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SubjectRe: [PATCH v3 2/2] drm/bridge: anx7625: Add anx7625 MIPI DSI/DPI to DP bridge driver
  Hi,

On Tue, Oct 15, 2019 at 5:52 PM Xin Ji <xji@analogixsemi.com> wrote:
>
> The ANX7625 is an ultra-low power 4K Mobile HD Transmitter designed
> for portable device. It converts MIPI DSI/DPI to DisplayPort 1.3 4K.
>
> The ANX7625 can support both USB Type-C PD feature and MIPI DSI/DPI
> to DP feature. This driver only enabled MIPI DSI/DPI to DP feature.
>
> Signed-off-by: Xin Ji <xji@analogixsemi.com>
> ---
> drivers/gpu/drm/bridge/Makefile | 2 +-
> drivers/gpu/drm/bridge/analogix/Kconfig | 6 +
> drivers/gpu/drm/bridge/analogix/Makefile | 1 +
> drivers/gpu/drm/bridge/analogix/anx7625.c | 2043 +++++++++++++++++++++++++++++
> drivers/gpu/drm/bridge/analogix/anx7625.h | 406 ++++++
> 5 files changed, 2457 insertions(+), 1 deletion(-)
> create mode 100644 drivers/gpu/drm/bridge/analogix/anx7625.c
> create mode 100644 drivers/gpu/drm/bridge/analogix/anx7625.h
>
> diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
> index 4934fcf..bcd388a 100644
> --- a/drivers/gpu/drm/bridge/Makefile
> +++ b/drivers/gpu/drm/bridge/Makefile
> @@ -12,8 +12,8 @@ obj-$(CONFIG_DRM_SII9234) += sii9234.o
> obj-$(CONFIG_DRM_THINE_THC63LVD1024) += thc63lvd1024.o
> obj-$(CONFIG_DRM_TOSHIBA_TC358764) += tc358764.o
> obj-$(CONFIG_DRM_TOSHIBA_TC358767) += tc358767.o
> -obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix/
> obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511/
> obj-$(CONFIG_DRM_TI_SN65DSI86) += ti-sn65dsi86.o
> obj-$(CONFIG_DRM_TI_TFP410) += ti-tfp410.o
> +obj-y += analogix/
> obj-y += synopsys/
> diff --git a/drivers/gpu/drm/bridge/analogix/Kconfig b/drivers/gpu/drm/bridge/analogix/Kconfig
> index e930ff9..b2f127e 100644
> --- a/drivers/gpu/drm/bridge/analogix/Kconfig
> +++ b/drivers/gpu/drm/bridge/analogix/Kconfig
> @@ -2,3 +2,9 @@
> config DRM_ANALOGIX_DP
> tristate
> depends on DRM
> +
> +config ANALOGIX_ANX7625
> + tristate "Analogix MIPI to DP interface support"
> + help
> + ANX7625 is an ultra-low power 4K mobile HD transmitter designed
> + for portable devices. It converts MIPI/DPI to DisplayPort1.3 4K.
> diff --git a/drivers/gpu/drm/bridge/analogix/Makefile b/drivers/gpu/drm/bridge/analogix/Makefile
> index fdbf3fd..8a52867 100644
> --- a/drivers/gpu/drm/bridge/analogix/Makefile
> +++ b/drivers/gpu/drm/bridge/analogix/Makefile
> @@ -1,3 +1,4 @@
> # SPDX-License-Identifier: GPL-2.0-only
> +obj-$(CONFIG_ANALOGIX_ANX7625) += anx7625.o
> analogix_dp-objs := analogix_dp_core.o analogix_dp_reg.o
> obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix_dp.o
> diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
> new file mode 100644
> index 0000000..456b95c
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
> @@ -0,0 +1,2043 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright(c) 2016, Analogix Semiconductor. All rights reserved.
> + *
> + */
> +#include <linux/extcon.h>
> +#include <linux/gcd.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/i2c.h>
> +#include <linux/interrupt.h>
> +#include <linux/iopoll.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/mutex.h>
> +#include <linux/slab.h>
> +#include <linux/types.h>
> +#include <linux/workqueue.h>
> +
> +#include <linux/of_gpio.h>
> +#include <linux/of_graph.h>
> +#include <linux/of_platform.h>
> +
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_bridge.h>
> +#include <drm/drm_crtc_helper.h>
> +#include <drm/drm_dp_helper.h>
> +#include <drm/drm_edid.h>
> +#include <drm/drm_mipi_dsi.h>
> +#include <drm/drm_panel.h>
> +#include <drm/drm_print.h>
> +#include <drm/drm_probe_helper.h>
> +
> +#include <video/display_timing.h>
> +
> +#include "anx7625.h"
> +
> +/*
> + * there is a sync issue while access I2C register between AP(CPU) and
> + * internal firmware(OCM), to avoid the race condition, AP should access
> + * the reserved slave address before slave address occurs changes.
> + */
> +static int i2c_access_workaround(struct anx7625_data *ctx,
> + struct i2c_client *client)
> +{
> + u8 offset;
> + struct device *dev = &client->dev;
> + int ret;
> +
> + if (client == ctx->last_client)
> + return 0;
> +
> + ctx->last_client = client;
> +
> + if (client == ctx->i2c.tcpc_client)
> + offset = RSVD_00_ADDR;
> + else if (client == ctx->i2c.tx_p0_client)
> + offset = RSVD_D1_ADDR;
> + else if (client == ctx->i2c.tx_p1_client)
> + offset = RSVD_60_ADDR;
> + else if (client == ctx->i2c.rx_p0_client)
> + offset = RSVD_39_ADDR;
> + else if (client == ctx->i2c.rx_p1_client)
> + offset = RSVD_7F_ADDR;
> + else
> + offset = RSVD_00_ADDR;
> +
> + ret = i2c_smbus_write_byte_data(client, offset, 0x00);
> + if (ret < 0)
> + DRM_DEV_ERROR(dev,
> + "failed to access i2c id=%x\n:%x",
> + client->addr, offset);
> +
> + return ret;
> +}
> +
> +static int anx7625_reg_read(struct anx7625_data *ctx,
> + struct i2c_client *client, u8 reg_addr)
> +{
> + int ret;
> + struct device *dev = &client->dev;
> +
> + i2c_access_workaround(ctx, client);
> +
> + ret = i2c_smbus_read_byte_data(client, reg_addr);
> + if (ret < 0)
> + DRM_DEV_ERROR(dev, "read i2c failed id=%x:%x\n",
> + client->addr, reg_addr);
> +
> + return ret;
> +}
> +
> +static int anx7625_reg_block_read(struct anx7625_data *ctx,
> + struct i2c_client *client,
> + u8 reg_addr, u8 len, u8 *buf)
> +{
> + int ret;
> + struct device *dev = &client->dev;
> +
> + i2c_access_workaround(ctx, client);
> +
> + ret = i2c_smbus_read_i2c_block_data(client, reg_addr, len, buf);
> + if (ret < 0)
> + DRM_DEV_ERROR(dev, "read i2c block failed id=%x:%x\n",
> + client->addr, reg_addr);
> +
> + return ret;
> +}
> +
> +static int anx7625_reg_write(struct anx7625_data *ctx,
> + struct i2c_client *client,
> + u8 reg_addr, u8 reg_val)
> +{
> + int ret;
> + struct device *dev = &client->dev;
> +
> + i2c_access_workaround(ctx, client);
> +
> + ret = i2c_smbus_write_byte_data(client, reg_addr, reg_val);
> +
> + if (ret < 0)
> + DRM_DEV_ERROR(dev, "failed to write i2c id=%x\n:%x",
> + client->addr, reg_addr);
> +
> + return ret;
> +}
> +
> +static int anx7625_write_or(struct anx7625_data *ctx,
> + struct i2c_client *client,
> + u8 offset, u8 mask)
> +{
> + int val;
> +
> + val = anx7625_reg_read(ctx, client, offset);
> + if (val < 0)
> + return val;
> +
> + return anx7625_reg_write(ctx, client, offset, (val | (mask)));
> +}
> +
> +static int anx7625_write_and(struct anx7625_data *ctx,
> + struct i2c_client *client,
> + u8 offset, u8 mask)
> +{
> + int val;
> +
> + val = anx7625_reg_read(ctx, client, offset);
> + if (val < 0)
> + return val;
> +
> + return anx7625_reg_write(ctx, client, offset, (val & (mask)));
> +}
> +
> +static int anx7625_write_and_or(struct anx7625_data *ctx,
> + struct i2c_client *client,
> + u8 offset, u8 and_mask, u8 or_mask)
> +{
> + int val;
> +
> + val = anx7625_reg_read(ctx, client, offset);
> + if (val < 0)
> + return val;
> +
> + return anx7625_reg_write(ctx, client,
> + offset, (val & and_mask) | (or_mask));
> +}
> +
> +static int anx7625_config_bit_matrix(struct anx7625_data *ctx)
> +{
> + int i, ret;
> +
> + ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> + AUDIO_CONTROL_REGISTER, 0x80);
> + for (i = 0; i < 13; i++)
> + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> + VIDEO_BIT_MATRIX_12 + i,
> + 0x18 + i);
> +
> + return ret;
> +}
> +
> +static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
> +{
> + return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_CTRL_STATUS);
> +}
> +
> +static int wait_aux_op_finish(struct anx7625_data *ctx)
> +{
> + int val;
> + int ret;
> + struct device *dev = &ctx->client->dev;
> +
> + ret = readx_poll_timeout(anx7625_read_ctrl_status_p0,
> + ctx, val,
> + (!(val & AP_AUX_CTRL_OP_EN) || (val < 0)),
> + 2000,
> + 2000 * 150);
> + if (ret) {
> + DRM_DEV_ERROR(dev, "aux operation failed!\n");
> + return -EIO;
> + }
> +
> + val = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_CTRL_STATUS);
> + if (val < 0 || (val & 0x0F)) {
> + DRM_DEV_ERROR(dev, "aux status %02x\n", val);
> + val = -EIO;
> + }
> +
> + return val;
> +}
> +
> +static int anx7625_video_mute_control(struct anx7625_data *ctx,
> + u8 status)
> +{
> + int ret;
> +
> + if (status) { /* mute on */
> + /* set mute flag */
> + ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, AP_MIPI_MUTE);
> + /* clear mipi RX en */
> + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, (u8)~AP_MIPI_RX_EN);
> + } else { /* mute off */
> + /* clear mute flag */
> + ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
> + /* set MIPI RX EN */
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, AP_MIPI_RX_EN);
> + }
> +
> + return ret;
> +}
> +
> +static int anx7625_config_audio_input(struct anx7625_data *ctx)
> +{
> + int ret;
> +
> + /* channel num */
> + ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> + AUDIO_CHANNEL_STATUS_6, I2S_CH_2 << 5);
> + /* layout */
> + /* as I2S channel is 2, no need to set layout */
> +
> + /* FS */
> + ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> + AUDIO_CHANNEL_STATUS_4,
> + 0xf0, AUDIO_FS_48K);
> + /* word length */
> + ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
> + AUDIO_CHANNEL_STATUS_5,
> + 0xf0, AUDIO_W_LEN_24_24MAX);
> + /* I2S */
> + ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
> + AUDIO_CHANNEL_STATUS_6, I2S_SLAVE_MODE);
> + ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client,
> + AUDIO_CONTROL_REGISTER, ~TDM_TIMING_MODE);
> + /* audio change flag */
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, AP_AUDIO_CHG);
> +
> + if (ret < 0)
> + DRM_ERROR("failed to config audio.\n");
> +
> + return ret;
> +}
> +
> +/* reduction of fraction a/b */
> +static void anx7625_reduction_of_a_fraction(unsigned long *a, unsigned long *b)
> +{
> + unsigned long gcd_num;
> + unsigned long tmp_a, tmp_b;
> + u32 i = 1;
> +
> + gcd_num = gcd(*a, *b);
> + *a /= gcd_num;
> + *b /= gcd_num;
> +
> + tmp_a = *a;
> + tmp_b = *b;
> +
> + while ((*a > MAX_UNSIGNED_24BIT) || (*b > MAX_UNSIGNED_24BIT)) {
> + i++;
> + *a = tmp_a / i;
> + *b = tmp_b / i;
> + }
> +
> + /*
> + * in the end, make a, b larger to have higher ODFC PLL
> + * output frequency accuracy
> + */
> + while ((*a < MAX_UNSIGNED_24BIT) && (*b < MAX_UNSIGNED_24BIT)) {
> + *a <<= 1;
> + *b <<= 1;
> + }
> +
> + *a >>= 1;
> + *b >>= 1;
> +}
> +
> +static int anx7625_calculate_m_n(u32 pixelclock,
> + unsigned long *m,
> + unsigned long *n,
> + u8 *post_divider)
> +{
> + if (pixelclock > PLL_OUT_FREQ_ABS_MAX / POST_DIVIDER_MIN) {
> + /* pixel clock frequency is too high */
> + DRM_ERROR("pixelclock too high, act(%d), maximum(%lu)\n",
> + pixelclock,
> + PLL_OUT_FREQ_ABS_MAX / POST_DIVIDER_MIN);
> + return -EINVAL;
> + }
> +
> + if (pixelclock < PLL_OUT_FREQ_ABS_MIN / POST_DIVIDER_MAX) {
> + /* pixel clock frequency is too low */
> + DRM_ERROR("pixelclock too low, act(%d), maximum(%lu)\n",
> + pixelclock,
> + PLL_OUT_FREQ_ABS_MIN / POST_DIVIDER_MAX);
> + return -EINVAL;
> + }
> +
> + for (*post_divider = 1;
> + pixelclock < (PLL_OUT_FREQ_MIN / (*post_divider));)
> + *post_divider += 1;
> +
> + if (*post_divider > POST_DIVIDER_MAX) {
> + for (*post_divider = 1;
> + (pixelclock <
> + (PLL_OUT_FREQ_ABS_MIN / (*post_divider)));)
> + *post_divider += 1;
> +
> + if (*post_divider > POST_DIVIDER_MAX) {
> + DRM_ERROR("cannot find property post_divider(%d)\n",
> + *post_divider);
> + return -EDOM;
> + }
> + }
> +
> + /* patch to improve the accuracy */
> + if (*post_divider == 7) {
> + /* 27,000,000 is not divisible by 7 */
> + *post_divider = 8;
> + } else if (*post_divider == 11) {
> + /* 27,000,000 is not divisible by 11 */
> + *post_divider = 12;
> + } else if ((*post_divider == 13) || (*post_divider == 14)) {
> + /*27,000,000 is not divisible by 13 or 14*/
> + *post_divider = 15;
> + }
> +
> + if (pixelclock * (*post_divider) > PLL_OUT_FREQ_ABS_MAX) {
> + DRM_ERROR("act clock(%u) large than maximum(%lu)\n",
> + pixelclock * (*post_divider),
> + PLL_OUT_FREQ_ABS_MAX);
> + return -EDOM;
> + }
> +
> + *m = pixelclock;
> + *n = XTAL_FRQ / (*post_divider);
> +
> + anx7625_reduction_of_a_fraction(m, n);
> +
> + return 0;
> +}
> +
> +static int anx7625_odfc_config(struct anx7625_data *ctx,
> + u8 post_divider)
> +{
> + int ret;
> +
> + /* config input reference clock frequency 27MHz/19.2MHz */
> + ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_16,
> + ~(REF_CLK_27000KHZ << MIPI_FREF_D_IND));
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_16,
> + (REF_CLK_27000KHZ << MIPI_FREF_D_IND));
> + /* post divider */
> + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
> + MIPI_DIGITAL_PLL_8, 0x0f);
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_8,
> + post_divider << 4);
> +
> + /* add patch for MIS2-125 (5pcs ANX7625 fail ATE MBIST test) */
> + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
> + ~MIPI_PLL_VCO_TUNE_REG_VAL);
> +
> + /* reset ODFC PLL */
> + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
> + ~MIPI_PLL_RESET_N);
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
> + MIPI_PLL_RESET_N);
> +
> + if (ret < 0)
> + DRM_ERROR("IO error.\n");
> +
> + return ret;
> +}
> +
> +static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
> +{
> + struct device *dev = &ctx->client->dev;
> + unsigned long m, n;
> + u16 htotal;
> + int ret;
> + u8 post_divider = 0;
> +
> + ret = anx7625_calculate_m_n(ctx->dt.pixelclock.min * 1000,
> + &m, &n, &post_divider);
> +
> + if (ret) {
> + DRM_ERROR("cannot get property m n value.\n");
> + return ret;
> + }
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "compute M(%lu), N(%lu), divider(%d).\n",
> + m, n, post_divider);
> +
> + /* configure pixel clock */
> + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, PIXEL_CLOCK_L,
> + (ctx->dt.pixelclock.min / 1000) & 0xFF);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, PIXEL_CLOCK_H,
> + (ctx->dt.pixelclock.min / 1000) >> 8);
> + /* lane count */
> + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
> + MIPI_LANE_CTRL_0, 0xfc);
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client,
> + MIPI_LANE_CTRL_0, 3);
> +
> + /* Htotal */
> + htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
> + ctx->dt.hback_porch.min + ctx->dt.hsync_len.min;
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_TOTAL_PIXELS_L, htotal & 0xFF);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_TOTAL_PIXELS_H, htotal >> 8);
> + /* Hactive */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_ACTIVE_PIXELS_L, ctx->dt.hactive.min & 0xFF);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_ACTIVE_PIXELS_H, ctx->dt.hactive.min >> 8);
> + /* HFP */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_FRONT_PORCH_L, ctx->dt.hfront_porch.min);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_FRONT_PORCH_H,
> + ctx->dt.hfront_porch.min >> 8);
> + /* HWS */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_SYNC_WIDTH_L, ctx->dt.hsync_len.min);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_SYNC_WIDTH_H, ctx->dt.hsync_len.min >> 8);
> + /* HBP */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_BACK_PORCH_L, ctx->dt.hback_porch.min);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + HORIZONTAL_BACK_PORCH_H, ctx->dt.hback_porch.min >> 8);
> + /* Vactive */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, ACTIVE_LINES_L,
> + ctx->dt.vactive.min);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, ACTIVE_LINES_H,
> + ctx->dt.vactive.min >> 8);
> + /* VFP */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + VERTICAL_FRONT_PORCH, ctx->dt.vfront_porch.min);
> + /* VWS */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + VERTICAL_SYNC_WIDTH, ctx->dt.vsync_len.min);
> + /* VBP */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
> + VERTICAL_BACK_PORCH, ctx->dt.vback_porch.min);
> + /* M value */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_PLL_M_NUM_23_16, (m >> 16) & 0xff);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_PLL_M_NUM_15_8, (m >> 8) & 0xff);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_PLL_M_NUM_7_0, (m & 0xff));
> + /* N value */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_PLL_N_NUM_23_16, (n >> 16) & 0xff);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_PLL_N_NUM_15_8, (n >> 8) & 0xff);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_PLL_N_NUM_7_0,
> + (n & 0xff));
> + /* diff */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_DIGITAL_ADJ_1, 0x37);
> +
> + ret |= anx7625_odfc_config(ctx, post_divider - 1);
> +
> + if (ret < 0)
> + DRM_ERROR("mipi dsi setup IO error.\n");
> +
> + return ret;
> +}
> +
> +static int anx7625_swap_dsi_lane3(struct anx7625_data *ctx)
> +{
> + int val;
> +
> + /* swap MIPI-DSI data lane 3 P and N */
> + val = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, MIPI_SWAP);
> + if (val < 0) {
> + DRM_ERROR("IO error : access MIPI_SWAP.\n");
> + return -EIO;
> + }
> +
> + val |= (1 << MIPI_SWAP_CH3);
> + return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_SWAP, val);
> +}
> +
> +static int anx7625_api_dsi_config(struct anx7625_data *ctx)
> +
> +{
> + int val, ret;
> +
> + /* swap MIPI-DSI data lane 3 P and N */
> + ret = anx7625_swap_dsi_lane3(ctx);
> + if (ret < 0) {
> + DRM_ERROR("IO error : swap dsi lane 3 failed.\n");
> + return ret;
> + }
> +
> + /* DSI clock settings */
> + val = (0 << MIPI_HS_PWD_CLK) |
> + (0 << MIPI_HS_RT_CLK) |
> + (0 << MIPI_PD_CLK) |
> + (1 << MIPI_CLK_RT_MANUAL_PD_EN) |
> + (1 << MIPI_CLK_HS_MANUAL_PD_EN) |
> + (0 << MIPI_CLK_DET_DET_BYPASS) |
> + (0 << MIPI_CLK_MISS_CTRL) |
> + (0 << MIPI_PD_LPTX_CH_MANUAL_PD_EN);
> + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_PHY_CONTROL_3, val);
> +
> + /*
> + * Decreased HS prepare timing delay from 160ns to 80ns work with
> + * a) Dragon board 810 series (Qualcomm AP)
> + * b) Moving Pixel DSI source (PG3A pattern generator +
> + * P332 D-PHY Probe) default D-PHY timing
> + * 5ns/step
> + */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_TIME_HS_PRPR, 0x10);
> +
> + /* enable DSI mode*/
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_18,
> + SELECT_DSI << MIPI_DPI_SELECT);
> +
> + ret |= anx7625_dsi_video_timing_config(ctx);
> + if (ret < 0) {
> + DRM_ERROR("dsi video timing config failed\n");
> + return ret;
> + }
> +
> + /* toggle m, n ready */
> + ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_6,
> + ~(MIPI_M_NUM_READY | MIPI_N_NUM_READY));
> + usleep_range(1000, 1100);
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_6,
> + MIPI_M_NUM_READY | MIPI_N_NUM_READY);
> +
> + /* configure integer stable register */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_VIDEO_STABLE_CNT, 0x02);
> + /* power on MIPI RX */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_LANE_CTRL_10, 0x00);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_LANE_CTRL_10, 0x80);
> +
> + if (ret < 0)
> + DRM_ERROR("IO error : mipi dsi enable init failed.\n");
> +
> + return ret;
> +}
> +
> +static int anx7625_dsi_config(struct anx7625_data *ctx)
> +{
> + struct device *dev = &ctx->client->dev;
> + int ret;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "config dsi.\n");
> +
> + /* DSC disable */
> + ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> + R_DSC_CTRL_0, ~DSC_EN);
> +
> + ret |= anx7625_api_dsi_config(ctx);
> +
> + if (ret < 0) {
> + DRM_ERROR("IO error : api dsi config error.\n");
> + return ret;
> + }
> +
> + /* set MIPI RX EN */
> + ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, AP_MIPI_RX_EN);
> + /* clear mute flag */
> + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
> + if (ret < 0)
> + DRM_ERROR("IO error : enable mipi rx failed.\n");
> + else
> + DRM_DEV_DEBUG_DRIVER(dev, "success to config DSI\n");
> +
> + return ret;
> +}
> +
> +static int anx7625_api_dpi_config(struct anx7625_data *ctx)
> +{
> + u16 freq = ctx->dt.pixelclock.min / 1000;
> + int ret;
> +
> + /* configure pixel clock */
> + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + PIXEL_CLOCK_L, freq & 0xFF);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + PIXEL_CLOCK_H, (freq >> 8));
> +
> + /* set DPI mode */
> + /* set to DPI PLL module sel */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_DIGITAL_PLL_9, 0x20);
> + /* power down MIPI */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_LANE_CTRL_10, 0x08);
> + /* enable DPI mode */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
> + MIPI_DIGITAL_PLL_18, 0x1C);
> + /* set first edge */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
> + VIDEO_CONTROL_0, 0x05);
> + if (ret < 0)
> + DRM_ERROR("IO error : dpi phy set failed.\n");
> +
> + return ret;
> +}
> +
> +static int anx7625_dpi_config(struct anx7625_data *ctx)
> +{
> + struct device *dev = &ctx->client->dev;
> + int ret;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "config dpi\n");
> +
> + /* DSC disable */
> + ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> + R_DSC_CTRL_0, ~DSC_EN);
> + if (ret < 0) {
> + DRM_ERROR("IO error : disable dsc failed.\n");
> + return ret;
> + }
> +
> + ret = anx7625_config_bit_matrix(ctx);
> + if (ret < 0) {
> + DRM_ERROR("config bit matrix failed.\n");
> + return ret;
> + }
> +
> + ret = anx7625_api_dpi_config(ctx);
> + if (ret < 0) {
> + DRM_ERROR("mipi phy(dpi) setup failed.\n");
> + return ret;
> + }
> +
> + /* set MIPI RX EN */
> + ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, AP_MIPI_RX_EN);
> + /* clear mute flag */
> + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
> + if (ret < 0)
> + DRM_ERROR("IO error : enable mipi rx failed.\n");
> +
> + return ret;
> +}
> +
> +static void anx7625_dp_start(struct anx7625_data *ctx)
> +{
> + int ret;
> +
> + if (!ctx->display_timing_valid) {
> + DRM_ERROR("mipi drm haven't set display timing yet.\n");
> + return;
> + }
> +
> + anx7625_config_audio_input(ctx);
> +
> + if (ctx->pdata.dsi_supported)
> + ret = anx7625_dsi_config(ctx);
> + else
> + ret = anx7625_dpi_config(ctx);
> +
> + if (ret < 0)
> + DRM_ERROR("MIPI phy setup error.\n");
> +}
> +
> +static void anx7625_dp_stop(struct anx7625_data *ctx)
> +{
> + struct device *dev = &ctx->client->dev;
> + int ret;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "stop dp output\n");
> +
> + /*
> + * video disable: 0x72:08 bit 7 = 0;
> + * audio disable: 0x70:87 bit 0 = 0;
> + */
> + ret = anx7625_write_and(ctx, ctx->i2c.tx_p0_client, 0x87, 0xfe);
> + ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, 0x08, 0x7f);
> +
> + ret |= anx7625_video_mute_control(ctx, 1);
> + if (ret < 0)
> + DRM_ERROR("IO error : mute video failed\n");
> +}
> +
> +static int sp_tx_rst_aux(struct anx7625_data *ctx)
> +{
> + int ret;
> +
> + ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client, RST_CTRL2,
> + AUX_RST);
> + ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, RST_CTRL2,
> + ~AUX_RST);
> + return ret;
> +}
> +
> +static int sp_tx_aux_wr(struct anx7625_data *ctx, u8 offset)
> +{
> + int ret;
> +
> + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_BUFF_START, offset);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_COMMAND, 0x04);
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN);
> + return (ret | wait_aux_op_finish(ctx));
> +}
> +
> +static int sp_tx_aux_rd(struct anx7625_data *ctx, u8 len_cmd)
> +{
> + int ret;
> +
> + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_COMMAND, len_cmd);
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN);
> + return (ret | wait_aux_op_finish(ctx));
> +}
> +
> +static int sp_tx_get_edid_block(struct anx7625_data *ctx)
> +{
> + int c = 0;
> + struct device *dev = &ctx->client->dev;
> +
> + sp_tx_aux_wr(ctx, 0x7e);
> + sp_tx_aux_rd(ctx, 0x01);
> + c = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_BUFF_START);
> + if (c < 0) {
> + DRM_ERROR("IO error : access AUX BUFF.\n");
> + return -EIO;
> + }
> +
> + DRM_DEV_DEBUG_DRIVER(dev, " EDID Block = %d\n", c + 1);
> +
> + if (c > MAX_EDID_BLOCK)
> + c = 1;
> +
> + return c;
> +}
> +
> +static int edid_read(struct anx7625_data *ctx,
> + u8 offset, u8 *pblock_buf)
> +{
> + int ret, cnt;
> + struct device *dev = &ctx->client->dev;
> +
> + for (cnt = 0; cnt <= EDID_TRY_CNT; cnt++) {
> + sp_tx_aux_wr(ctx, offset);
> + /* set I2C read com 0x01 mot = 0 and read 16 bytes */
> + ret = sp_tx_aux_rd(ctx, 0xf1);
> +
> + if (ret) {
> + sp_tx_rst_aux(ctx);
> + DRM_DEV_DEBUG_DRIVER(dev, "edid read failed, reset!\n");
> + } else {
> + ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_BUFF_START,
> + MAX_DPCD_BUFFER_SIZE,
> + pblock_buf);
> + if (!ret)

The anx7625_reg_block_read (i2c_smbus_read_i2c_block_data) return
number of bytes read on success, so this should be if (ret > 0).

> + break;
> + }
> + }
> +
> + if (cnt > EDID_TRY_CNT)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static int segments_edid_read(struct anx7625_data *ctx,
> + u8 segment, u8 *buf, u8 offset)
> +{
> + u8 cnt;
> + int ret;
> + struct device *dev = &ctx->client->dev;
> +
> + /* write address only */
> + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_ADDR_7_0, 0x30);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_COMMAND, 0x04);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_CTRL_STATUS,
> + AP_AUX_CTRL_ADDRONLY | AP_AUX_CTRL_OP_EN);
> +
> + ret |= wait_aux_op_finish(ctx);
> + /* write segment address */
> + ret |= sp_tx_aux_wr(ctx, segment);
> + /* data read */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_ADDR_7_0, 0x50);
> + if (ret) {
> + DRM_ERROR("IO error : aux initial failed.\n");
> + return ret;
> + }
> +
> + for (cnt = 0; cnt <= EDID_TRY_CNT; cnt++) {
> + sp_tx_aux_wr(ctx, offset);
> + /* set I2C read com 0x01 mot = 0 and read 16 bytes */
> + ret = sp_tx_aux_rd(ctx, 0xf1);
> +
> + if (ret) {
> + ret = sp_tx_rst_aux(ctx);
> + DRM_DEV_ERROR(dev, "segment read failed, reset!\n");
> + } else {
> + ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_BUFF_START,
> + MAX_DPCD_BUFFER_SIZE, buf);
> + if (!ret)

Same here, if (ret > 0) ?

> + break;
> + }
> + }
> +
> + if (cnt > EDID_TRY_CNT)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static int sp_tx_edid_read(struct anx7625_data *ctx,
> + u8 *pedid_blocks_buf)
> +{
> + u8 offset, edid_pos;
> + int count, blocks_num;
> + u8 pblock_buf[MAX_DPCD_BUFFER_SIZE];
> + u8 i, j;
> + u8 g_edid_break = 0;
> + int ret;
> + struct device *dev = &ctx->client->dev;
> +
> + /* address initial */
> + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_ADDR_7_0, 0x50);
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_ADDR_15_8, 0);
> + ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
> + AP_AUX_ADDR_19_16, 0xf0);
> + if (ret < 0) {
> + DRM_ERROR("access aux channel IO error.\n");
> + return -EIO;
> + }
> +
> + blocks_num = sp_tx_get_edid_block(ctx);
> + if (blocks_num < 0)
> + return blocks_num;
> +
> + count = 0;
> +
> + do {
> + switch (count) {
> + case 0:
> + case 1:
> + for (i = 0; i < 8; i++) {
> + offset = (i + count * 8) * MAX_DPCD_BUFFER_SIZE;
> + g_edid_break = edid_read(ctx, offset,
> + pblock_buf);
> +
> + if (g_edid_break)
> + break;
> +
> + memcpy(&pedid_blocks_buf[offset],
> + pblock_buf,
> + MAX_DPCD_BUFFER_SIZE);
> + }
> +
> + break;
> + case 2:
> + offset = 0x00;
> +
> + for (j = 0; j < 8; j++) {
> + edid_pos = (j + count * 8) *
> + MAX_DPCD_BUFFER_SIZE;
> +
> + if (g_edid_break == 1)
> + break;
> +
> + segments_edid_read(ctx, count / 2,
> + pblock_buf, offset);
> + memcpy(&pedid_blocks_buf[edid_pos],
> + pblock_buf,
> + MAX_DPCD_BUFFER_SIZE);
> + offset = offset + 0x10;
> + }
> +
> + break;
> + case 3:
> + offset = 0x80;
> +
> + for (j = 0; j < 8; j++) {
> + edid_pos = (j + count * 8) *
> + MAX_DPCD_BUFFER_SIZE;
> + if (g_edid_break == 1)
> + break;
> +
> + segments_edid_read(ctx, count / 2,
> + pblock_buf, offset);
> + memcpy(&pedid_blocks_buf[edid_pos],
> + pblock_buf,
> + MAX_DPCD_BUFFER_SIZE);
> + offset = offset + 0x10;
> + }
> +
> + break;
> + default:
> + break;
> + }
> +
> + count++;
> +
> + } while (blocks_num >= count);
> +
> + /* check edid data */
> + if (!drm_edid_is_valid((struct edid *)pedid_blocks_buf)) {
> + DRM_DEV_ERROR(dev, "WARNING! edid check failed!\n");
> + return -EINVAL;
> + }
> +
> + /* reset aux channel */
> + sp_tx_rst_aux(ctx);
> +
> + return (blocks_num + 1);
> +}
> +
> +static void anx7625_power_on(struct anx7625_data *ctx)
> +{
> + struct device *dev = &ctx->client->dev;
> +
> + if (!ctx->pdata.low_power_mode) {
> + DRM_DEV_DEBUG_DRIVER(dev, "Anx7625 not low power mode!\n");
> + return;
> + }
> +
> + /* power on pin enable */
> + gpiod_set_value(ctx->pdata.gpio_p_on, 1);
> + usleep_range(10000, 11000);
> + /* power reset pin enable */
> + gpiod_set_value(ctx->pdata.gpio_reset, 1);
> + usleep_range(10000, 11000);
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "Anx7625 power on !\n");
> +}
> +
> +static void anx7625_power_standby(struct anx7625_data *ctx)
> +{
> + struct device *dev = &ctx->client->dev;
> +
> + if (!ctx->pdata.low_power_mode) {
> + DRM_DEV_DEBUG_DRIVER(dev, "anx7625 not low power mode!\n");
> + return;
> + }
> +
> + gpiod_set_value(ctx->pdata.gpio_reset, 0);
> + usleep_range(1000, 1100);
> + gpiod_set_value(ctx->pdata.gpio_p_on, 0);
> + usleep_range(1000, 1100);
> + DRM_DEV_DEBUG_DRIVER(dev, "anx7625 power down\n");
> +}
> +
> +/* basic configurations of ANX7625 */
> +static void anx7625_config(struct anx7625_data *ctx)
> +{
> + anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + XTAL_FRQ_SEL, XTAL_FRQ_27M);
> +}
> +
> +static void anx7625_disable_pd_protocol(struct anx7625_data *ctx)
> +{
> + struct device *dev = &ctx->client->dev;
> + int ret;
> +
> + /* reset main ocm */
> + ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x40);
> + /* Disable PD */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + AP_AV_STATUS, AP_DISABLE_PD);
> + /* release main ocm */
> + ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x00);
> +
> + if (ret < 0)
> + DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature failed.\n");
> + else
> + DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature succeeded.\n");
> +}
> +
> +static void anx7625_power_on_init(struct anx7625_data *ctx)
> +{
> + int retry_count, i;
> + int ret;
> + struct device *dev = &ctx->client->dev;
> +
> + for (retry_count = 0; retry_count < 3; retry_count++) {
> + anx7625_power_on(ctx);
> + anx7625_config(ctx);
> +
> + for (i = 0; i < OCM_LOADING_TIME; i++) {
> + /* check interface workable */
> + ret = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
> + FLASH_LOAD_STA);
> + if (ret < 0) {
> + DRM_ERROR("IO error : access flash load.\n");
> + return;
> + }
> + if ((ret & FLASH_LOAD_STA_CHK) == FLASH_LOAD_STA_CHK) {
> + anx7625_disable_pd_protocol(ctx);
> + DRM_DEV_DEBUG_DRIVER(dev,
> + "Firmware ver %02x%02x,",
> + anx7625_reg_read(ctx,
> + ctx->i2c.rx_p0_client,
> + OCM_FW_VERSION),
> + anx7625_reg_read(ctx,
> + ctx->i2c.rx_p0_client,
> + OCM_FW_REVERSION));
> + DRM_DEV_DEBUG_DRIVER(dev, "Driver version %s\n",
> + ANX7625_DRV_VERSION);
> +
> + return;
> + }
> + usleep_range(1000, 1100);
> + }
> + anx7625_power_standby(ctx);
> + }
> +}
> +
> +static int anx7625_extcon_notifier(struct notifier_block *nb,
> + unsigned long event, void *ptr)
> +{
> + struct anx7625_data *ctx =
> + container_of(nb, struct anx7625_data, event_nb);
> +
> + schedule_work(&ctx->extcon_wq);
> + return NOTIFY_DONE;
> +}
> +
> +static void anx7625_chip_control(struct anx7625_data *ctx, int state)
> +{
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "before set, power_state(%d).\n",
> + atomic_read(&ctx->power_status));
> +
> + if (!ctx->pdata.low_power_mode)
> + return;
> +
> + if (state) {
> + atomic_inc(&ctx->power_status);
> + if (atomic_read(&ctx->power_status) == 1)
> + anx7625_power_on_init(ctx);
> + } else {
> + if (atomic_read(&ctx->power_status)) {
> + atomic_dec(&ctx->power_status);
> +
> + if (atomic_read(&ctx->power_status) == 0)
> + anx7625_power_standby(ctx);
> + }
> + }
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "after set, power_state(%d).\n",
> + atomic_read(&ctx->power_status));
> +}
> +
> +static void anx7625_extcon_work(struct work_struct *work)
> +{
> + struct anx7625_data *ctx =
> + container_of(work, struct anx7625_data, extcon_wq);
> + int state = extcon_get_state(ctx->extcon, EXTCON_DISP_DP);
> +
> + mutex_lock(&ctx->lock);
> + anx7625_chip_control(ctx, state);
> + mutex_unlock(&ctx->lock);
> +}
> +
> +static int anx7625_extcon_notifier_init(struct anx7625_data *ctx)
> +{
> + int ret;
> + struct device *dev = &ctx->client->dev;
> +
> + ctx->event_nb.notifier_call = anx7625_extcon_notifier;
> + INIT_WORK(&ctx->extcon_wq, anx7625_extcon_work);
> + ret = devm_extcon_register_notifier(&ctx->client->dev, ctx->extcon,
> + EXTCON_DISP_DP, &ctx->event_nb);
> + if (ret) {
> + DRM_DEV_ERROR(dev, "failed to register notifier for DP");
> + return ret;
> + }
> + return 0;
> +}
> +
> +static void anx7625_init_gpio(struct anx7625_data *platform)
> +{
> + struct device *dev = &platform->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "anx7625 init gpio\n");
> +
> + /* gpio for chip power enable */
> + platform->pdata.gpio_p_on =
> + devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
> + /* gpio for chip reset */
> + platform->pdata.gpio_reset =
> + devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
> +
> + if (platform->pdata.gpio_p_on && platform->pdata.gpio_reset) {
> + platform->pdata.low_power_mode = 1;
> + DRM_DEV_DEBUG_DRIVER(dev, "low power mode, pon %d, reset %d.\n",
> + desc_to_gpio(platform->pdata.gpio_p_on),
> + desc_to_gpio(platform->pdata.gpio_reset));
> + } else {
> + platform->pdata.low_power_mode = 0;
> + DRM_DEV_DEBUG_DRIVER(dev, "not low power mode.\n");
> + }
> +}
> +
> +static void anx7625_stop_dp_work(struct anx7625_data *ctx)
> +{
> + ctx->hpd_status = 0;
> + ctx->hpd_high_cnt = 0;
> + ctx->display_timing_valid = 0;
> +
> + ctx->slimport_edid_p.edid_block_num = -1;
> +
> + if (ctx->pdata.low_power_mode == 0)
> + anx7625_disable_pd_protocol(ctx);
> +}
> +
> +static void anx7625_start_dp_work(struct anx7625_data *ctx)
> +{
> + int ret;
> + struct device *dev = &ctx->client->dev;
> +
> + if (ctx->hpd_high_cnt >= 2) {
> + DRM_DEV_DEBUG_DRIVER(dev, "anx7625 filter useless HPD\n");
> + return;
> + }
> +
> + ctx->hpd_high_cnt++;
> +
> + /* not support HDCP */
> + ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f);
> +
> + /* try auth flag */
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
> + /* interrupt for DRM */
> + ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
> + if (ret < 0)
> + return;
> +
> + ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
> + if (ret < 0)
> + return;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "Secure OCM version=%02x\n", ret);
> +}
> +
> +static int anx7625_read_hpd_status_p0(struct anx7625_data *ctx)
> +{
> + return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, SYSTEM_STSTUS);
> +}
> +
> +static void anx7625_hpd_polling(struct anx7625_data *ctx)
> +{
> + int ret, val;
> + struct device *dev = &ctx->client->dev;
> +
> + if (atomic_read(&ctx->power_status) != 1) {
> + DRM_DEV_DEBUG_DRIVER(dev, "No need to poling HPD status.\n");
> + return;
> + }
> +
> + ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
> + ctx, val,
> + ((val & HPD_STATUS) || (val < 0)),
> + 5000,
> + 5000 * 100);
> + if (ret) {
> + DRM_DEV_ERROR(dev, "HPD polling timeout!\n");
> + } else {
> + DRM_DEV_DEBUG_DRIVER(dev, "HPD raise up.\n");
> + anx7625_reg_write(ctx, ctx->i2c.tcpc_client,
> + INTR_ALERT_1, 0xFF);
> + anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + INTERFACE_CHANGE_INT, 0);
> + }
> +
> + anx7625_start_dp_work(ctx);
> +}
> +
> +static void anx7625_disconnect_check(struct anx7625_data *ctx)
> +{
> + if (atomic_read(&ctx->power_status) == 0)
> + anx7625_stop_dp_work(ctx);
> +}
> +
> +static void anx7625_low_power_mode_check(struct anx7625_data *ctx,
> + int state)
> +{
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "low power mode check, state(%d).\n", state);
> +
> + if (ctx->pdata.low_power_mode) {
> + anx7625_chip_control(ctx, state);
> + if (state)
> + anx7625_hpd_polling(ctx);
> + else
> + anx7625_disconnect_check(ctx);
> + }
> +}
> +
> +static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
> +{
> + struct device *dev = &ctx->client->dev;
> +
> + /* hpd changed */
> + DRM_DEV_DEBUG_DRIVER(dev, "dp_hpd_change_default_func: %d\n",
> + (u32)on);
> +
> + if (on == 0) {
> + DRM_DEV_DEBUG_DRIVER(dev, " HPD low\n");
> + anx7625_stop_dp_work(ctx);
> + } else {
> + DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
> + anx7625_start_dp_work(ctx);
> + }
> +
> + ctx->hpd_status = 1;
> +}
> +
> +static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
> +{
> + int intr_vector, status;
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "power_status=%d\n",
> + (u32)atomic_read(&ctx->power_status));
> +
> + status = anx7625_reg_write(ctx, ctx->i2c.tcpc_client,
> + INTR_ALERT_1, 0xFF);
> + if (status < 0) {
> + DRM_ERROR("IO error : clear alert register.\n");
> + return status;
> + }
> +
> + intr_vector = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
> + INTERFACE_CHANGE_INT);
> + if (intr_vector < 0) {
> + DRM_ERROR("IO error : access interrupt change register.\n");
> + return intr_vector;
> + }
> + DRM_DEV_DEBUG_DRIVER(dev, "0x7e:0x44=%x\n", intr_vector);
> + status = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
> + INTERFACE_CHANGE_INT,
> + intr_vector & (~intr_vector));
> + if (status < 0) {
> + DRM_ERROR("IO error : clear interrupt change register.\n");
> + return status;
> + }
> +
> + if (!(intr_vector & HPD_STATUS_CHANGE))
> + return -ENOENT;
> +
> + status = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
> + SYSTEM_STSTUS);
> + if (status < 0) {
> + DRM_ERROR("IO error : clear interrupt status.\n");
> + return status;
> + }
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "0x7e:0x45=%x\n", status);
> + dp_hpd_change_handler(ctx, status & HPD_STATUS);
> +
> + return 0;
> +}
> +
> +static void anx7625_work_func(struct work_struct *work)
> +{
> + int event;
> + struct anx7625_data *ctx = container_of(work,
> + struct anx7625_data, work);
> +
> + mutex_lock(&ctx->lock);
> + event = anx7625_hpd_change_detect(ctx);
> + mutex_unlock(&ctx->lock);
> +
> + if (event < 0)
> + return;
> +
> + if (ctx->bridge_attached)
> + drm_helper_hpd_irq_event(ctx->connector.dev);
> +}
> +
> +static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
> +{
> + struct anx7625_data *ctx = (struct anx7625_data *)data;
> +
> + if (atomic_read(&ctx->power_status) != 1)
> + return IRQ_NONE;
> +
> + queue_work(ctx->workqueue, &ctx->work);
> +
> + return IRQ_HANDLED;
> +}
> +
> +#ifdef CONFIG_OF
> +static int anx7625_parse_dt(struct device *dev,
> + struct anx7625_platform_data *pdata)
> +{
> + struct device_node *np = dev->of_node;
> + struct device_node *panel_node, *out_ep;
> +
> + of_property_read_u32(dev->of_node, "panel_flags",
> + &pdata->panel_flags);
> + DRM_DEV_DEBUG_DRIVER(dev, "panel_flags : %d\n", pdata->panel_flags);
> +
> + if (pdata->panel_flags == 1)
> + pdata->internal_panel = 1;
> + else if (pdata->panel_flags == 2)
> + pdata->extcon_supported = 1;
> + DRM_DEV_DEBUG_DRIVER(dev, "%s support extcon, %s internal panel\n",
> + pdata->extcon_supported ? "" : "not",
> + pdata->internal_panel ? "has" : "no");
> +
> + pdata->node.mipi_dsi_host_node = of_graph_get_remote_node(np, 0, 0);
> + if (pdata->node.mipi_dsi_host_node) {
> + of_node_put(pdata->node.mipi_dsi_host_node);
> + pdata->dsi_supported = 1;
> + DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
> + } else {
> + pdata->node.mipi_dpi_host_node =
> + of_graph_get_remote_node(np, 1, 0);
> +
> + if (pdata->node.mipi_dpi_host_node) {
> + of_node_put(pdata->node.mipi_dpi_host_node);
> + DRM_DEV_DEBUG_DRIVER(dev, "found dpi host node.\n");
> + }
> + }
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "dsi_supported : %d\n", pdata->dsi_supported);
> +
> + pdata->node.panel_node = of_graph_get_port_by_id(np, 2);
> + if (pdata->node.panel_node) {
> + of_node_put(pdata->node.panel_node);
> + out_ep = of_get_child_by_name(pdata->node.panel_node,
> + "endpoint");
> + if (!out_ep) {
> + DRM_DEV_DEBUG_DRIVER(dev, "cannot get endpoint.\n");
> + return -EPROBE_DEFER;
> + }
> +
> + panel_node = of_graph_get_remote_port_parent(out_ep);
> + of_node_put(out_ep);
> +
> + pdata->panel = of_drm_find_panel(panel_node);
> + DRM_DEV_DEBUG_DRIVER(dev, "get panel node.\n");
> + of_node_put(panel_node);
> + if (IS_ERR_OR_NULL(pdata->panel))
> + return -EPROBE_DEFER;
> + } else {
> + if (pdata->internal_panel) {
> + DRM_ERROR("failed to get internal panel.\n");
> + return -EPROBE_DEFER;
> + }
> + }
> +
> + return 0;
> +}
> +#else
> +static int anx7625_parse_dt(struct device *dev,
> + struct anx7625_platform_data *pdata)
> +{
> + return -ENODEV;
> +}
> +#endif
> +
> +static inline struct anx7625_data *connector_to_anx7625(struct drm_connector *c)
> +{
> + return container_of(c, struct anx7625_data, connector);
> +}
> +
> +static inline struct anx7625_data *bridge_to_anx7625(struct drm_bridge *bridge)
> +{
> + return container_of(bridge, struct anx7625_data, bridge);
> +}
> +
> +static void anx7625_post_disable(struct drm_bridge *bridge)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> + struct device *dev = &ctx->client->dev;
> + int ret;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "post disable\n");
> +
> + if (!ctx->pdata.panel)
> + return;
> +
> + ret = drm_panel_unprepare(ctx->pdata.panel);
> + if (ret)
> + DRM_ERROR("failed to unprepare panel: %d\n", ret);
> + else
> + DRM_DEV_DEBUG_DRIVER(dev, "backlight unprepared.\n");
> +
> + atomic_set(&ctx->panel_power, 0);
> +}
> +
> +static void anx7625_pre_enable(struct drm_bridge *bridge)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> + struct device *dev = &ctx->client->dev;
> + int ret;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "pre enable\n");
> +
> + if (!ctx->pdata.panel)
> + return;
> +
> + ret = drm_panel_prepare(ctx->pdata.panel);
> + if (ret < 0)
> + DRM_ERROR("failed to prepare panel: %d\n", ret);
> + else
> + DRM_DEV_DEBUG_DRIVER(dev, "backlight prepared.\n");
> + atomic_set(&ctx->panel_power, 1);
> +}
> +
> +static int anx7625_get_modes(struct drm_connector *connector)
> +{
> + struct anx7625_data *ctx = connector_to_anx7625(connector);
> + int err, num_modes = 0;
> + int turn_off_flag = 0;
> + struct s_edid_data *p_edid = &ctx->slimport_edid_p;
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm get modes\n");
> +
> + if (ctx->slimport_edid_p.edid_block_num > 0)
> + goto out;
> +
> + mutex_lock(&ctx->lock);
> +
> + if (ctx->pdata.panel && atomic_read(&ctx->panel_power) == 0) {
> + turn_off_flag = 1;
> + anx7625_pre_enable(&ctx->bridge);
> + }
> +
> + anx7625_low_power_mode_check(ctx, 1);
> +
> + p_edid->edid_block_num = sp_tx_edid_read(ctx, p_edid->edid_raw_data);
> +
> + err = -EIO;
> + if (p_edid->edid_block_num < 0) {
> + DRM_ERROR("Failed to read EDID.\n");
> + goto fail;
> + }
> +
> + err = drm_connector_update_edid_property(connector,
> + (struct edid *)
> + &p_edid->edid_raw_data);
> +
> + if (err)
> + DRM_ERROR("Failed to update EDID property: %d\n", err);
> +
> +fail:
> + mutex_unlock(&ctx->lock);
> + anx7625_low_power_mode_check(ctx, 0);
> + if (ctx->pdata.panel && turn_off_flag == 1)
> + anx7625_post_disable(&ctx->bridge);
> +
> + if (err)
> + return err;
> +
> +out:
> + num_modes = drm_add_edid_modes(connector,
> + (struct edid *)&p_edid->edid_raw_data);
> + DRM_DEV_DEBUG_DRIVER(dev, "num_modes(%d)\n", num_modes);
> +
> + return num_modes;
> +}
> +
> +static enum drm_mode_status
> +anx7625_connector_mode_valid(struct drm_connector *connector,
> + struct drm_display_mode *mode)
> +{
> + struct anx7625_data *ctx = connector_to_anx7625(connector);
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm modes valid verify\n");
> +
> + if (mode->clock > SUPPORT_PIXEL_CLOCK)
> + return MODE_CLOCK_HIGH;
> +
> + return MODE_OK;
> +}
> +
> +static struct drm_connector_helper_funcs anx7625_connector_helper_funcs = {
> + .get_modes = anx7625_get_modes,
> + .mode_valid = anx7625_connector_mode_valid,
> +};
> +
> +static enum drm_connector_status anx7625_detect(struct drm_connector *connector,
> + bool force)
> +{
> + struct anx7625_data *ctx = connector_to_anx7625(connector);
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm detect\n");
> +
> + if (ctx->pdata.internal_panel)
> + return connector_status_connected;
> +
> + if (!ctx->hpd_status)
> + return connector_status_disconnected;
> +
> + return connector_status_connected;
> +}
> +
> +static const struct drm_connector_funcs anx7625_connector_funcs = {
> + .fill_modes = drm_helper_probe_single_connector_modes,
> + .detect = anx7625_detect,
> + .destroy = drm_connector_cleanup,
> + .reset = drm_atomic_helper_connector_reset,
> + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> +};
> +
> +static int anx7625_attach_dsi(struct anx7625_data *ctx)
> +{
> + struct mipi_dsi_host *host;
> + struct mipi_dsi_device *dsi;
> + struct device_node *mipi_host_node;
> + struct device *dev = &ctx->client->dev;
> + const struct mipi_dsi_device_info info = {
> + .type = "anx7625",
> + .channel = 0,
> + .node = NULL,
> + };
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "attach dsi\n");
> +
> + if (ctx->pdata.dsi_supported)
> + mipi_host_node = ctx->pdata.node.mipi_dsi_host_node;
> + else
> + mipi_host_node = ctx->pdata.node.mipi_dpi_host_node;
> +
> + if (!mipi_host_node) {
> + DRM_ERROR("dsi host is not configured.\n");
> + return -EINVAL;
> + }
> +
> + host = of_find_mipi_dsi_host_by_node(mipi_host_node);
> + if (!host) {
> + DRM_ERROR("failed to find dsi host.\n");
> + return -EINVAL;
> + }
> +
> + dsi = mipi_dsi_device_register_full(host, &info);
> + if (IS_ERR(dsi)) {
> + DRM_ERROR("failed to create dsi device.\n");
> + return -EINVAL;
> + }
> +
> + dsi->lanes = 4;
> + dsi->format = MIPI_DSI_FMT_RGB888;
> + dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
> + MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
> + MIPI_DSI_MODE_EOT_PACKET |
> + MIPI_DSI_MODE_VIDEO_HSE;
> +
> + if (mipi_dsi_attach(dsi) < 0) {
> + DRM_ERROR("failed to attach dsi to host.\n");
> + mipi_dsi_device_unregister(dsi);
> + return -EINVAL;
> + }
> +
> + ctx->dsi = dsi;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "attach dsi succeeded.\n");
> +
> + return 0;
> +}
> +
> +static void anx7625_bridge_detach(struct drm_bridge *bridge)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> +
> + if (ctx->dsi) {
> + mipi_dsi_detach(ctx->dsi);
> + mipi_dsi_device_unregister(ctx->dsi);
> + }
> +
> + if (ctx->bridge_attached)
> + drm_connector_unregister(&ctx->connector);
> +}
> +
> +static int anx7625_bridge_attach(struct drm_bridge *bridge)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> + int err;
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm attach\n");
> + if (!bridge->encoder) {
> + DRM_ERROR("Parent encoder object not found");
> + return -ENODEV;
> + }
> +
> + err = drm_connector_init(bridge->dev, &ctx->connector,
> + &anx7625_connector_funcs,
> + DRM_MODE_CONNECTOR_DisplayPort);
> + if (err) {
> + DRM_ERROR("Failed to initialize connector: %d\n", err);
> + return err;
> + }
> +
> + drm_connector_helper_add(&ctx->connector,
> + &anx7625_connector_helper_funcs);
> +
> + err = drm_connector_register(&ctx->connector);
> + if (err) {
> + DRM_ERROR("Failed to register connector: %d\n", err);
> + return err;
> + }
> +
> + ctx->connector.polled = DRM_CONNECTOR_POLL_HPD;
> +
> + err = drm_connector_attach_encoder(&ctx->connector, bridge->encoder);
> + if (err) {
> + DRM_ERROR("Failed to link up connector to encoder: %d\n", err);
> + drm_connector_unregister(&ctx->connector);
> + return err;
> + }
> +
> + err = anx7625_attach_dsi(ctx);
> + if (err) {
> + DRM_ERROR("Failed to attach to dsi : %d\n", err);
> + drm_connector_unregister(&ctx->connector);
> + return err;
> + }
> +
> + ctx->bridge_attached = 1;
> +
> + return 0;
> +}
> +
> +static enum drm_mode_status
> +anx7625_bridge_mode_valid(struct drm_bridge *bridge,
> + const struct drm_display_mode *mode)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm mode checking\n");
> +
> + /* Max 1200p at 5.4 Ghz, one lane, pixel clock 300M */
> + if (mode->clock > SUPPORT_PIXEL_CLOCK) {
> + DRM_DEV_DEBUG_DRIVER(dev,
> + "drm mode invalid, pixelclock too high.\n");
> + return MODE_CLOCK_HIGH;
> + }
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm mode valid.\n");
> +
> + return MODE_OK;
> +}
> +
> +static void anx7625_bridge_mode_set(struct drm_bridge *bridge,
> + const struct drm_display_mode *old_mode,
> + const struct drm_display_mode *mode)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> + struct device *dev = &ctx->client->dev;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm mode set\n");
> +
> + mutex_lock(&ctx->lock);
> +
> + ctx->dt.pixelclock.min = mode->clock;
> + ctx->dt.hactive.min = mode->hdisplay;
> + ctx->dt.hsync_len.min = mode->hsync_end - mode->hsync_start;
> + ctx->dt.hfront_porch.min = mode->hsync_start - mode->hdisplay;
> + ctx->dt.hback_porch.min = mode->htotal - mode->hsync_end;
> + ctx->dt.vactive.min = mode->vdisplay;
> + ctx->dt.vsync_len.min = mode->vsync_end - mode->vsync_start;
> + ctx->dt.vfront_porch.min = mode->vsync_start - mode->vdisplay;
> + ctx->dt.vback_porch.min = mode->vtotal - mode->vsync_end;
> +
> + ctx->display_timing_valid = 1;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "pixelclock(%d).\n", ctx->dt.pixelclock.min);
> + DRM_DEV_DEBUG_DRIVER(dev, "hactive(%d), hsync(%d), hfp(%d), hbp(%d)\n",
> + ctx->dt.hactive.min,
> + ctx->dt.hsync_len.min,
> + ctx->dt.hfront_porch.min,
> + ctx->dt.hback_porch.min);
> + DRM_DEV_DEBUG_DRIVER(dev, "vactive(%d), vsync(%d), vfp(%d), vbp(%d)\n",
> + ctx->dt.vactive.min,
> + ctx->dt.vsync_len.min,
> + ctx->dt.vfront_porch.min,
> + ctx->dt.vback_porch.min);
> + DRM_DEV_DEBUG_DRIVER(dev, "hdisplay(%d),hsync_start(%d).\n",
> + mode->hdisplay,
> + mode->hsync_start);
> + DRM_DEV_DEBUG_DRIVER(dev, "hsync_end(%d),htotal(%d).\n",
> + mode->hsync_end,
> + mode->htotal);
> + DRM_DEV_DEBUG_DRIVER(dev, "vdisplay(%d),vsync_start(%d).\n",
> + mode->vdisplay,
> + mode->vsync_start);
> + DRM_DEV_DEBUG_DRIVER(dev, "vsync_end(%d),vtotal(%d).\n",
> + mode->vsync_end,
> + mode->vtotal);
> +
> + mutex_unlock(&ctx->lock);
> +}
> +
> +static void anx7625_bridge_enable(struct drm_bridge *bridge)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> + struct device *dev = &ctx->client->dev;
> + int ret;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm enable\n");
> +
> + anx7625_low_power_mode_check(ctx, 1);
> +
> + if (WARN_ON(!atomic_read(&ctx->power_status)))
> + return;
> +
> + if (ctx->pdata.panel) {
> + ret = drm_panel_enable(ctx->pdata.panel);
> + if (ret < 0) {
> + DRM_ERROR("failed to enable panel: %d.\n", ret);
> + return;
> + }
> + }
> +
> + mutex_lock(&ctx->lock);
> + anx7625_dp_start(ctx);
> + mutex_unlock(&ctx->lock);
> +}
> +
> +static void anx7625_bridge_disable(struct drm_bridge *bridge)
> +{
> + struct anx7625_data *ctx = bridge_to_anx7625(bridge);
> + struct device *dev = &ctx->client->dev;
> + int ret;
> +
> + if (WARN_ON(!atomic_read(&ctx->power_status)))
> + return;
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm disable\n");
> +
> + if (ctx->pdata.panel) {
> + ret = drm_panel_disable(ctx->pdata.panel);
> + if (ret < 0)
> + DRM_ERROR("failed to disable panel: %d.\n", ret);
> + }
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "drm disable\n");
> + mutex_lock(&ctx->lock);
> +
> + anx7625_dp_stop(ctx);
> +
> + anx7625_low_power_mode_check(ctx, 0);
> +
> + mutex_unlock(&ctx->lock);
> +}
> +
> +static const struct drm_bridge_funcs anx7625_bridge_funcs = {
> + .attach = anx7625_bridge_attach,
> + .detach = anx7625_bridge_detach,
> + .disable = anx7625_bridge_disable,
> + .post_disable = anx7625_post_disable,
> + .pre_enable = anx7625_pre_enable,
> + .mode_valid = anx7625_bridge_mode_valid,
> + .mode_set = anx7625_bridge_mode_set,
> + .enable = anx7625_bridge_enable,
> +};
> +
> +static int anx7625_register_i2c_dummy_clients(struct anx7625_data *ctx,
> + struct i2c_client *client)
> +{
> + ctx->i2c.tx_p0_client = i2c_new_dummy(client->adapter,
> + TX_P0_ADDR >> 1);
> + if (!ctx->i2c.tx_p0_client)
> + return -ENOMEM;
> +
> + ctx->i2c.tx_p1_client = i2c_new_dummy(client->adapter,
> + TX_P1_ADDR >> 1);
> + if (!ctx->i2c.tx_p1_client)
> + goto free_tx_p0;
> +
> + ctx->i2c.tx_p2_client = i2c_new_dummy(client->adapter,
> + TX_P2_ADDR >> 1);
> + if (!ctx->i2c.tx_p2_client)
> + goto free_tx_p1;
> +
> + ctx->i2c.rx_p0_client = i2c_new_dummy(client->adapter,
> + RX_P0_ADDR >> 1);
> + if (!ctx->i2c.rx_p0_client)
> + goto free_tx_p2;
> +
> + ctx->i2c.rx_p1_client = i2c_new_dummy(client->adapter,
> + RX_P1_ADDR >> 1);
> + if (!ctx->i2c.rx_p1_client)
> + goto free_rx_p0;
> +
> + ctx->i2c.rx_p2_client = i2c_new_dummy(client->adapter,
> + RX_P2_ADDR >> 1);
> + if (!ctx->i2c.rx_p2_client)
> + goto free_rx_p1;
> +
> + ctx->i2c.tcpc_client = i2c_new_dummy(client->adapter,
> + TCPC_INTERFACE_ADDR >> 1);
> + if (!ctx->i2c.tcpc_client)
> + goto free_rx_p2;
> +
> + return 0;
> +
> +free_rx_p2:
> + i2c_unregister_device(ctx->i2c.rx_p2_client);
> +free_rx_p1:
> + i2c_unregister_device(ctx->i2c.rx_p1_client);
> +free_rx_p0:
> + i2c_unregister_device(ctx->i2c.rx_p0_client);
> +free_tx_p2:
> + i2c_unregister_device(ctx->i2c.tx_p2_client);
> +free_tx_p1:
> + i2c_unregister_device(ctx->i2c.tx_p1_client);
> +free_tx_p0:
> + i2c_unregister_device(ctx->i2c.tx_p0_client);
> +
> + return -ENOMEM;
> +}
> +
> +static void anx7625_unregister_i2c_dummy_clients(struct anx7625_data *ctx)
> +{
> + i2c_unregister_device(ctx->i2c.tx_p0_client);
> + i2c_unregister_device(ctx->i2c.tx_p1_client);
> + i2c_unregister_device(ctx->i2c.tx_p2_client);
> + i2c_unregister_device(ctx->i2c.rx_p0_client);
> + i2c_unregister_device(ctx->i2c.rx_p1_client);
> + i2c_unregister_device(ctx->i2c.rx_p2_client);
> + i2c_unregister_device(ctx->i2c.tcpc_client);
> +}
> +
> +static int anx7625_i2c_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct anx7625_data *platform;
> + struct anx7625_platform_data *pdata;
> + int ret = 0;
> + struct device *dev = &client->dev;
> +
> + if (!i2c_check_functionality(client->adapter,
> + I2C_FUNC_SMBUS_I2C_BLOCK)) {
> + DRM_DEV_ERROR(dev, "anx7625's i2c bus doesn't support\n");
> + return -ENODEV;
> + }
> +
> + platform = kzalloc(sizeof(*platform), GFP_KERNEL);
> + if (!platform) {
> + DRM_DEV_ERROR(dev, "failed to allocate driver data\n");
> + return -ENOMEM;
> + }
> +
> + pdata = &platform->pdata;
> +
> + ret = anx7625_parse_dt(dev, pdata);
> + if (ret) {
> + DRM_DEV_ERROR(dev, "failed to parse devicetree.\n");
> + goto free_platform;
> + }
> +
> + anx7625_init_gpio(platform);

platform->client is used inside the anx7625_init_gpio, so this should
be after the ->client is set.

> +
> + /* to access global platform data */
> + platform->client = client;
> + i2c_set_clientdata(client, platform);
> +
> + if (platform->pdata.extcon_supported) {
> + /* get extcon device from DTS */
> + ret = -EINVAL;
> + platform->extcon = extcon_get_edev_by_phandle(dev, 0);
> + if (PTR_ERR(platform->extcon) == -EPROBE_DEFER)
> + goto free_platform;
> +
> + if (IS_ERR(platform->extcon)) {
> + DRM_DEV_ERROR(dev,
> + "can not get extcon device!");
> + goto free_platform;
> + }
> +
> + ret = anx7625_extcon_notifier_init(platform);
> + if (ret)
> + goto free_platform;
> + }
> +
> + atomic_set(&platform->power_status, 0);
> +
> + mutex_init(&platform->lock);
> +
> + platform->pdata.intp_irq = client->irq;
> + if (platform->pdata.intp_irq) {
> + INIT_WORK(&platform->work, anx7625_work_func);
> + platform->workqueue = create_workqueue("anx7625_work");
> + if (!platform->workqueue) {
> + DRM_DEV_ERROR(dev, "failed to create work queue\n");
> + ret = -ENOMEM;
> + goto free_platform;
> + }
> +
> + ret = devm_request_threaded_irq(dev, platform->pdata.intp_irq,
> + NULL, anx7625_intr_hpd_isr,
> + IRQF_TRIGGER_FALLING |
> + IRQF_ONESHOT,
> + "anx7625-intp", platform);
> + if (ret) {
> + DRM_DEV_ERROR(dev, "failed to request irq\n");
> + goto free_wq;
> + }
> + }
> +
> + if (anx7625_register_i2c_dummy_clients(platform, client) != 0) {
> + ret = -ENOMEM;
> + DRM_ERROR("Failed to reserve I2C bus.\n");
> + goto free_wq;
> + }
> +
> + if (platform->pdata.low_power_mode == 0) {
> + anx7625_disable_pd_protocol(platform);
> + atomic_set(&platform->power_status, 1);
> + }
> +
> + /* add work function */
> + if (platform->pdata.intp_irq)
> + queue_work(platform->workqueue, &platform->work);
> +
> + platform->bridge.funcs = &anx7625_bridge_funcs;
> + if (IS_ENABLED(CONFIG_OF))
> + platform->bridge.of_node = client->dev.of_node;
> + drm_bridge_add(&platform->bridge);
> +
> + DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
> +
> + return 0;
> +
> +free_wq:
> + if (platform->workqueue)
> + destroy_workqueue(platform->workqueue);
> +
> +free_platform:
> + kfree(platform);
> +
> + return ret;
> +}
> +
> +static int anx7625_i2c_remove(struct i2c_client *client)
> +{
> + struct anx7625_data *platform = i2c_get_clientdata(client);
> +
> + drm_bridge_remove(&platform->bridge);
> +
> + if (platform->pdata.intp_irq)
> + destroy_workqueue(platform->workqueue);
> +
> + if (platform->pdata.extcon_supported) {
> + devm_extcon_unregister_notifier(&platform->client->dev,
> + platform->extcon,
> + EXTCON_DISP_DP,
> + &platform->event_nb);
> + flush_work(&platform->extcon_wq);
> + }
> +
> + anx7625_unregister_i2c_dummy_clients(platform);
> +
> + kfree(platform);
> + return 0;
> +}
> +
> +static const struct i2c_device_id anx7625_id[] = {
> + {"anx7625", 0},
> + {}
> +};
> +
> +MODULE_DEVICE_TABLE(i2c, anx7625_id);
> +
> +#ifdef CONFIG_OF
> +static const struct of_device_id anx_match_table[] = {
> + {.compatible = "analogix,anx7625",},
> + {},
> +};
> +#endif
> +
> +static struct i2c_driver anx7625_driver = {
> + .driver = {
> + .name = "anx7625",
> +#ifdef CONFIG_OF
> + .of_match_table = anx_match_table,
> +#endif
> + },
> + .probe = anx7625_i2c_probe,
> + .remove = anx7625_i2c_remove,
> +
> + .id_table = anx7625_id,
> +};
> +
> +module_i2c_driver(anx7625_driver);
> +
> +MODULE_DESCRIPTION("MIPI2DP anx7625 driver");
> +MODULE_AUTHOR("Xin Ji <xji@analogixsemi.com>");
> +MODULE_LICENSE("GPL v2");
> +MODULE_VERSION(ANX7625_DRV_VERSION);
> diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
> new file mode 100644
> index 0000000..c871a6c
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
> @@ -0,0 +1,406 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * Copyright(c) 2016, Analogix Semiconductor. All rights reserved.
> + *
> + */
> +
> +#ifndef __ANX7625_H__
> +#define __ANX7625_H__
> +
> +#ifndef LOG_TAG
> +#define LOG_TAG "anx7625dp"
> +#endif
> +
> +#define ANX7625_DRV_VERSION "0.1.04"
> +
> +/* Loading OCM re-trying times */
> +#define OCM_LOADING_TIME 10
> +
> +/********* ANX7625 Register **********/
> +#define TX_P0_ADDR 0x70
> +#define TX_P1_ADDR 0x7A
> +#define TX_P2_ADDR 0x72
> +
> +#define RX_P0_ADDR 0x7e
> +#define RX_P1_ADDR 0x84
> +#define RX_P2_ADDR 0x54
> +
> +#define RSVD_00_ADDR 0x00
> +#define RSVD_D1_ADDR 0xD1
> +#define RSVD_60_ADDR 0x60
> +#define RSVD_39_ADDR 0x39
> +#define RSVD_7F_ADDR 0x7F
> +
> +#define TCPC_INTERFACE_ADDR 0x58
> +
> +/* anx7625 clock frequency in Hz */
> +#define XTAL_FRQ (27 * 1000000)
> +
> +#define POST_DIVIDER_MIN 1
> +#define POST_DIVIDER_MAX 16
> +#define PLL_OUT_FREQ_MIN 520000000UL
> +#define PLL_OUT_FREQ_MAX 730000000UL
> +#define PLL_OUT_FREQ_ABS_MIN 300000000UL
> +#define PLL_OUT_FREQ_ABS_MAX 800000000UL
> +#define MAX_UNSIGNED_24BIT 16777215UL
> +
> +/***************************************************************/
> +/* Register definition of device address 0x58 */
> +
> +#define PRODUCT_ID_L 0x02
> +#define PRODUCT_ID_H 0x03
> +
> +#define INTR_ALERT_1 0xCC
> +#define INTR_SOFTWARE_INT BIT(3)
> +#define INTR_RECEIVED_MSG BIT(5)
> +
> +#define SYSTEM_STSTUS 0x45
> +#define INTERFACE_CHANGE_INT 0x44
> +#define HPD_STATUS_CHANGE 0x80
> +#define HPD_STATUS 0x80
> +
> +/******** END of I2C Address 0x58 ********/
> +
> +/***************************************************************/
> +/* Register definition of device address 0x70 */
> +#define I2C_ADDR_70_DPTX 0x70
> +
> +#define SP_TX_LINK_BW_SET_REG 0xA0
> +#define SP_TX_LANE_COUNT_SET_REG 0xA1
> +
> +#define M_VID_0 0xC0
> +#define M_VID_1 0xC1
> +#define M_VID_2 0xC2
> +#define N_VID_0 0xC3
> +#define N_VID_1 0xC4
> +#define N_VID_2 0xC5
> +
> +/***************************************************************/
> +/* Register definition of device address 0x72 */
> +#define AUX_RST 0x04
> +#define RST_CTRL2 0x07
> +
> +#define SP_TX_TOTAL_LINE_STA_L 0x24
> +#define SP_TX_TOTAL_LINE_STA_H 0x25
> +#define SP_TX_ACT_LINE_STA_L 0x26
> +#define SP_TX_ACT_LINE_STA_H 0x27
> +#define SP_TX_V_F_PORCH_STA 0x28
> +#define SP_TX_V_SYNC_STA 0x29
> +#define SP_TX_V_B_PORCH_STA 0x2A
> +#define SP_TX_TOTAL_PIXEL_STA_L 0x2B
> +#define SP_TX_TOTAL_PIXEL_STA_H 0x2C
> +#define SP_TX_ACT_PIXEL_STA_L 0x2D
> +#define SP_TX_ACT_PIXEL_STA_H 0x2E
> +#define SP_TX_H_F_PORCH_STA_L 0x2F
> +#define SP_TX_H_F_PORCH_STA_H 0x30
> +#define SP_TX_H_SYNC_STA_L 0x31
> +#define SP_TX_H_SYNC_STA_H 0x32
> +#define SP_TX_H_B_PORCH_STA_L 0x33
> +#define SP_TX_H_B_PORCH_STA_H 0x34
> +
> +#define SP_TX_VID_CTRL 0x84
> +#define SP_TX_BPC_MASK 0xE0
> +#define SP_TX_BPC_6 0x00
> +#define SP_TX_BPC_8 0x20
> +#define SP_TX_BPC_10 0x40
> +#define SP_TX_BPC_12 0x60
> +
> +#define VIDEO_BIT_MATRIX_12 0x4c
> +
> +#define AUDIO_CHANNEL_STATUS_1 0xd0
> +#define AUDIO_CHANNEL_STATUS_2 0xd1
> +#define AUDIO_CHANNEL_STATUS_3 0xd2
> +#define AUDIO_CHANNEL_STATUS_4 0xd3
> +#define AUDIO_CHANNEL_STATUS_5 0xd4
> +#define AUDIO_CHANNEL_STATUS_6 0xd5
> +#define TDM_SLAVE_MODE 0x10
> +#define I2S_SLAVE_MODE 0x08
> +
> +#define AUDIO_CONTROL_REGISTER 0xe6
> +#define TDM_TIMING_MODE 0x08
> +
> +#define I2C_ADDR_72_DPTX 0x72
> +
> +#define VIDEO_CONTROL_0 0x08
> +
> +#define ACTIVE_LINES_L 0x14
> +#define ACTIVE_LINES_H 0x15 /* note: bit[7:6] are reserved */
> +#define VERTICAL_FRONT_PORCH 0x16
> +#define VERTICAL_SYNC_WIDTH 0x17
> +#define VERTICAL_BACK_PORCH 0x18
> +
> +#define HORIZONTAL_TOTAL_PIXELS_L 0x19
> +#define HORIZONTAL_TOTAL_PIXELS_H 0x1A /* note: bit[7:6] are reserved */
> +#define HORIZONTAL_ACTIVE_PIXELS_L 0x1B
> +#define HORIZONTAL_ACTIVE_PIXELS_H 0x1C /* note: bit[7:6] are reserved */
> +#define HORIZONTAL_FRONT_PORCH_L 0x1D
> +#define HORIZONTAL_FRONT_PORCH_H 0x1E /* note: bit[7:4] are reserved */
> +#define HORIZONTAL_SYNC_WIDTH_L 0x1F
> +#define HORIZONTAL_SYNC_WIDTH_H 0x20 /* note: bit[7:4] are reserved */
> +#define HORIZONTAL_BACK_PORCH_L 0x21
> +#define HORIZONTAL_BACK_PORCH_H 0x22 /* note: bit[7:4] are reserved */
> +
> +/******** END of I2C Address 0x72 *********/
> +/***************************************************************/
> +/* Register definition of device address 0x7e */
> +
> +#define I2C_ADDR_7E_FLASH_CONTROLLER 0x7E
> +
> +#define FLASH_LOAD_STA 0x05
> +#define FLASH_LOAD_STA_CHK BIT(7)
> +
> +#define XTAL_FRQ_SEL 0x3F
> +/* bit field positions */
> +#define XTAL_FRQ_SEL_POS 5
> +/* bit field values */
> +#define XTAL_FRQ_19M2 (0 << XTAL_FRQ_SEL_POS)
> +#define XTAL_FRQ_27M (4 << XTAL_FRQ_SEL_POS)
> +
> +#define R_DSC_CTRL_0 0x40
> +#define READ_STATUS_EN 7
> +#define CLK_1MEG_RB 6 /* 1MHz clock reset; 0=reset, 0=reset release */
> +#define DSC_BIST_DONE 1 /* bit[5:1]: 1=DSC MBIST pass */
> +#define DSC_EN 0x01 /* 1=DSC enabled, 0=DSC disabled */
> +
> +#define OCM_FW_VERSION 0x31
> +#define OCM_FW_REVERSION 0x32
> +
> +#define AP_AUX_ADDR_7_0 0x11
> +#define AP_AUX_ADDR_15_8 0x12
> +#define AP_AUX_ADDR_19_16 0x13
> +
> +/* note: bit[0:3] AUX status, bit 4 op_en, bit 5 address only */
> +#define AP_AUX_CTRL_STATUS 0x14
> +#define AP_AUX_CTRL_OP_EN 0x10
> +#define AP_AUX_CTRL_ADDRONLY 0x20
> +
> +#define AP_AUX_BUFF_START 0x15
> +#define PIXEL_CLOCK_L 0x25
> +#define PIXEL_CLOCK_H 0x26
> +
> +#define AP_AUX_COMMAND 0x27 /* com+len */
> +/* bit 0&1: 3D video structure */
> +/* 0x01: frame packing, 0x02:Line alternative, 0x03:Side-by-side(full) */
> +#define AP_AV_STATUS 0x28
> +#define AP_VIDEO_CHG BIT(2)
> +#define AP_AUDIO_CHG BIT(3)
> +#define AP_MIPI_MUTE BIT(4) /* 1:MIPI input mute, 0: ummute */
> +#define AP_MIPI_RX_EN BIT(5) /* 1: MIPI RX input in 0: no RX in */
> +#define AP_DISABLE_PD BIT(6)
> +#define AP_DISABLE_DISPLAY BIT(7)
> +/***************************************************************/
> +/* Register definition of device address 0x84 */
> +#define MIPI_PHY_CONTROL_3 0x03
> +#define MIPI_HS_PWD_CLK 7
> +#define MIPI_HS_RT_CLK 6
> +#define MIPI_PD_CLK 5
> +#define MIPI_CLK_RT_MANUAL_PD_EN 4
> +#define MIPI_CLK_HS_MANUAL_PD_EN 3
> +#define MIPI_CLK_DET_DET_BYPASS 2
> +#define MIPI_CLK_MISS_CTRL 1
> +#define MIPI_PD_LPTX_CH_MANUAL_PD_EN 0
> +
> +#define MIPI_LANE_CTRL_0 0x05
> +#define MIPI_TIME_HS_PRPR 0x08
> +
> +/* After MIPI RX protocol layer received this many video frames, */
> +/* protocol layer starts to reconstruct video stream from PHY */
> +#define MIPI_VIDEO_STABLE_CNT 0x0A
> +
> +#define MIPI_LANE_CTRL_10 0x0F
> +#define MIPI_DIGITAL_ADJ_1 0x1B
> +
> +#define MIPI_PLL_M_NUM_23_16 0x1E
> +#define MIPI_PLL_M_NUM_15_8 0x1F
> +#define MIPI_PLL_M_NUM_7_0 0x20
> +#define MIPI_PLL_N_NUM_23_16 0x21
> +#define MIPI_PLL_N_NUM_15_8 0x22
> +#define MIPI_PLL_N_NUM_7_0 0x23
> +
> +#define MIPI_DIGITAL_PLL_6 0x2A
> +/* bit[7:6]: VCO band control, only effective */
> +/* when MIPI_PLL_FORCE_BAND_EN (0x84:0x2B[6]) is 1 */
> +#define MIPI_M_NUM_READY 0x10
> +#define MIPI_N_NUM_READY 0x08
> +#define STABLE_INTEGER_CNT_EN 0x04
> +#define MIPI_PLL_TEST_BIT 0
> +/* bit[1:0]: test point output select - */
> +/* 00: VCO power, 01: dvdd_pdt, 10: dvdd, 11: vcox */
> +
> +#define MIPI_DIGITAL_PLL_7 0x2B
> +#define MIPI_PLL_FORCE_N_EN 7
> +#define MIPI_PLL_FORCE_BAND_EN 6
> +
> +#define MIPI_PLL_VCO_TUNE_REG 4
> +/* bit[5:4]: VCO metal capacitance - */
> +/* 00: +20% fast, 01: +10% fast (default), 10: typical, 11: -10% slow */
> +#define MIPI_PLL_VCO_TUNE_REG_VAL 0x30
> +
> +#define MIPI_PLL_PLL_LDO_BIT 2
> +/* bit[3:2]: vco_v2i power - */
> +/* 00: 1.40V, 01: 1.45V (default), 10: 1.50V, 11: 1.55V */
> +#define MIPI_PLL_RESET_N 0x02
> +#define MIPI_FRQ_FORCE_NDET 0
> +
> +#define MIPI_ALERT_CLR_0 0x2D
> +#define HS_link_error_clear 7
> +/* This bit itself is S/C, and it clears 0x84:0x31[7] */
> +
> +#define MIPI_ALERT_OUT_0 0x31
> +#define check_sum_err_hs_sync 7
> +/* This bit is cleared by 0x84:0x2D[7] */
> +
> +#define MIPI_DIGITAL_PLL_8 0x33
> +#define MIPI_POST_DIV_VAL 4
> +/* n means divided by (n+1), n = 0~15 */
> +#define MIPI_EN_LOCK_FRZ 3
> +#define MIPI_FRQ_COUNTER_RST 2
> +#define MIPI_FRQ_SET_REG_8 1
> +/* bit 0 is reserved */
> +
> +#define MIPI_DIGITAL_PLL_9 0x34
> +
> +#define MIPI_DIGITAL_PLL_16 0x3B
> +#define MIPI_FRQ_FREEZE_NDET 7
> +#define MIPI_FRQ_REG_SET_ENABLE 6
> +#define MIPI_REG_FORCE_SEL_EN 5
> +#define MIPI_REG_SEL_DIV_REG 4
> +#define MIPI_REG_FORCE_PRE_DIV_EN 3
> +/* bit 2 is reserved */
> +#define MIPI_FREF_D_IND 1
> +#define REF_CLK_27000KHZ 1
> +#define REF_CLK_19200KHZ 0
> +#define MIPI_REG_PLL_PLL_TEST_ENABLE 0
> +
> +#define MIPI_DIGITAL_PLL_18 0x3D
> +#define FRQ_COUNT_RB_SEL 7
> +#define REG_FORCE_POST_DIV_EN 6
> +#define MIPI_DPI_SELECT 5
> +#define SELECT_DSI 1
> +#define SELECT_DPI 0
> +#define REG_BAUD_DIV_RATIO 0
> +
> +#define H_BLANK_L 0x3E
> +/* for DSC only */
> +#define H_BLANK_H 0x3F
> +/* for DSC only; note: bit[7:6] are reserved */
> +#define MIPI_SWAP 0x4A
> +#define MIPI_SWAP_CH0 7
> +#define MIPI_SWAP_CH1 6
> +#define MIPI_SWAP_CH2 5
> +#define MIPI_SWAP_CH3 4
> +#define MIPI_SWAP_CLK 3
> +/* bit[2:0] are reserved */
> +
> +/******** END of I2C Address 0x84 *********/
> +
> +/* DPCD regs */
> +#define DPCD_DPCD_REV 0x00
> +#define DPCD_MAX_LINK_RATE 0x01
> +#define DPCD_MAX_LANE_COUNT 0x02
> +
> +/********* ANX7625 Register End **********/
> +
> +/***************** Display *****************/
> +enum audio_fs {
> + AUDIO_FS_441K = 0x00,
> + AUDIO_FS_48K = 0x02,
> + AUDIO_FS_32K = 0x03,
> + AUDIO_FS_882K = 0x08,
> + AUDIO_FS_96K = 0x0a,
> + AUDIO_FS_1764K = 0x0c,
> + AUDIO_FS_192K = 0x0e
> +};
> +
> +enum audio_wd_len {
> + AUDIO_W_LEN_16_20MAX = 0x02,
> + AUDIO_W_LEN_18_20MAX = 0x04,
> + AUDIO_W_LEN_17_20MAX = 0x0c,
> + AUDIO_W_LEN_19_20MAX = 0x08,
> + AUDIO_W_LEN_20_20MAX = 0x0a,
> + AUDIO_W_LEN_20_24MAX = 0x03,
> + AUDIO_W_LEN_22_24MAX = 0x05,
> + AUDIO_W_LEN_21_24MAX = 0x0d,
> + AUDIO_W_LEN_23_24MAX = 0x09,
> + AUDIO_W_LEN_24_24MAX = 0x0b
> +};
> +
> +#define I2S_CH_2 0x01
> +#define TDM_CH_4 0x03
> +#define TDM_CH_6 0x05
> +#define TDM_CH_8 0x07
> +
> +#define MAX_DPCD_BUFFER_SIZE 16
> +
> +#define ONE_BLOCK_SIZE 128
> +#define FOUR_BLOCK_SIZE (128 * 4)
> +
> +#define MAX_EDID_BLOCK 3
> +#define EDID_TRY_CNT 3
> +#define SUPPORT_PIXEL_CLOCK 300000
> +
> +struct s_edid_data {
> + int edid_block_num;
> + u8 edid_raw_data[FOUR_BLOCK_SIZE];
> +};
> +
> +/***************** Display End *****************/
> +
> +struct anx7625_device_node {
> + struct device_node *mipi_dsi_host_node;
> + struct device_node *mipi_dpi_host_node;
> + struct device_node *panel_node;
> +};
> +
> +struct anx7625_platform_data {
> + struct gpio_desc *gpio_p_on;
> + struct gpio_desc *gpio_reset;
> + struct drm_panel *panel;
> + int intp_irq;
> + u32 panel_flags;
> + u32 low_power_mode;
> + u32 dsi_supported;
> + u32 internal_panel;
> + u32 extcon_supported;
> + struct anx7625_device_node node;
> +};
> +
> +struct anx7625_i2c_client {
> + struct i2c_client *tx_p0_client;
> + struct i2c_client *tx_p1_client;
> + struct i2c_client *tx_p2_client;
> + struct i2c_client *rx_p0_client;
> + struct i2c_client *rx_p1_client;
> + struct i2c_client *rx_p2_client;
> + struct i2c_client *tcpc_client;
> +};
> +
> +struct anx7625_data {
> + struct anx7625_platform_data pdata;
> + atomic_t power_status;
> + atomic_t panel_power;
> + int hpd_status;
> + int hpd_high_cnt;
> + struct i2c_client *client;
> + struct anx7625_i2c_client i2c;
> + struct i2c_client *last_client;
> + struct s_edid_data slimport_edid_p;
> + struct work_struct work;
> + struct workqueue_struct *workqueue;
> + /* drm bridge mutex lock */
> + struct mutex lock;
> + char edid_block;
> + struct display_timing dt;
> + u8 display_timing_valid;
> + struct drm_bridge bridge;
> + u8 bridge_attached;
> + struct drm_connector connector;
> + struct mipi_dsi_device *dsi;
> + struct drm_dp_link link;
> + struct drm_display_mode vid_info;
> + struct notifier_block event_nb;
> + struct extcon_dev *extcon;
> + struct work_struct extcon_wq;
> +};
> +
> +#endif /* __ANX7625_H__ */
> --
> 2.7.4

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