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Subject[PATCH 2/7] drm/rockchip/dsi: add dual mipi channel support
Date
Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
---
drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 353 ++++++++++++++++++++--------
drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 1 +
drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 2 +
drivers/gpu/drm/rockchip/rockchip_drm_vop.h | 3 +
4 files changed, 257 insertions(+), 102 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
index 52698b7..9265b7f 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -42,6 +42,17 @@
#define RK3399_GRF_SOC_CON22 0x6258
#define RK3399_GRF_DSI_MODE 0xffff0000

+/* disable turndisable, forcetxstopmode, forcerxmode, enable */
+#define RK3399_GRF_SOC_CON23 0x625c
+#define RK3399_GRF_DSI1_MODE1 0xffff0000
+#define RK3399_GRF_DSI1_ENABLE 0x000f000f
+/* disable basedir and enable clk*/
+#define RK3399_GRF_SOC_CON24 0x6260
+#define RK3399_TXRX_MASTERSLAVEZ BIT(7)
+#define RK3399_TXRX_ENABLECLK BIT(6)
+#define RK3399_TXRX_BASEDIR BIT(5)
+#define RK3399_GRF_DSI1_MODE2 0x00e00080
+
#define DSI_VERSION 0x00
#define DSI_PWR_UP 0x04
#define RESET 0
@@ -282,6 +293,12 @@ struct dw_mipi_dsi_plat_data {
u32 grf_switch_reg;
u32 grf_dsi0_mode;
u32 grf_dsi0_mode_reg;
+ u32 grf_dsi1_mode;
+ u32 grf_dsi1_mode_reg1;
+ u32 dsi1_basedir;
+ u32 dsi1_masterslavez;
+ u32 dsi1_enableclk;
+ u32 grf_dsi1_mode_reg2;
unsigned int flags;
unsigned int max_data_lanes;
};
@@ -300,6 +317,12 @@ struct dw_mipi_dsi {
struct clk *pclk;
struct clk *phy_cfg_clk;

+ /* dual-channel */
+ struct dw_mipi_dsi *master;
+ struct dw_mipi_dsi *slave;
+ struct device_node *panel_node;
+ int id;
+
int dpms_mode;
unsigned int lane_mbps; /* per lane */
u32 channel;
@@ -526,6 +549,7 @@ static int dw_mipi_dsi_get_lane_bps(struct dw_mipi_dsi *dsi,
unsigned int target_mbps = 1000;
unsigned int max_mbps = dptdin_map[ARRAY_SIZE(dptdin_map) - 1].max_mbps;
int bpp;
+ int lanes = dsi->lanes;
unsigned long best_freq = 0;
unsigned long fvco_min, fvco_max, fin ,fout;
unsigned int min_prediv, max_prediv;
@@ -540,10 +564,13 @@ static int dw_mipi_dsi_get_lane_bps(struct dw_mipi_dsi *dsi,
return bpp;
}

+ if (dsi->slave || dsi->master)
+ lanes = dsi->lanes * 2;
+
mpclk = DIV_ROUND_UP(mode->clock, MSEC_PER_SEC);
if (mpclk) {
/* take 1 / 0.8, since mbps must big than bandwidth of RGB */
- tmp = mpclk * (bpp / dsi->lanes) * 10 / 8;
+ tmp = mpclk * (bpp / lanes) * 10 / 8;
if (tmp < max_mbps)
target_mbps = tmp;
else
@@ -605,17 +632,26 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
struct mipi_dsi_device *device)
{
struct dw_mipi_dsi *dsi = host_to_dsi(host);
+ int lanes = dsi->slave ? device->lanes / 2 : device->lanes;

- if (device->lanes > dsi->pdata->max_data_lanes) {
+ if (lanes > dsi->pdata->max_data_lanes) {
dev_err(dsi->dev, "the number of data lanes(%u) is too many\n",
- device->lanes);
+ lanes);
return -EINVAL;
}

- dsi->lanes = device->lanes;
+ dsi->lanes = lanes;
dsi->channel = device->channel;
dsi->format = device->format;
dsi->mode_flags = device->mode_flags;
+
+ if (dsi->slave) {
+ dsi->slave->lanes = lanes;
+ dsi->slave->channel = device->channel;
+ dsi->slave->format = device->format;
+ dsi->slave->mode_flags = device->mode_flags;
+ }
+
dsi->panel = of_drm_find_panel(device->dev.of_node);
if (dsi->panel)
return drm_panel_attach(dsi->panel, &dsi->connector);
@@ -745,15 +781,22 @@ static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host,
int ret;

dw_mipi_message_config(dsi, msg);
+ if (dsi->slave)
+ dw_mipi_message_config(dsi->slave, msg);

switch (msg->type) {
case MIPI_DSI_DCS_SHORT_WRITE:
case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE:
+ case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM:
ret = dw_mipi_dsi_dcs_short_write(dsi, msg);
+ if (dsi->slave)
+ ret = dw_mipi_dsi_dcs_short_write(dsi->slave, msg);
break;
case MIPI_DSI_DCS_LONG_WRITE:
ret = dw_mipi_dsi_dcs_long_write(dsi, msg);
+ if (dsi->slave)
+ ret = dw_mipi_dsi_dcs_long_write(dsi->slave, msg);
break;
default:
dev_err(dsi->dev, "unsupported message type 0x%02x\n",
@@ -827,6 +870,64 @@ static void dw_mipi_dsi_init(struct dw_mipi_dsi *dsi)
TX_ESC_CLK_DIVIDSION(esc_clk_division));
}

+static void rockchip_dsi_grf_config(struct dw_mipi_dsi *dsi, int vop_id)
+{
+ const struct dw_mipi_dsi_plat_data *pdata = dsi->pdata;
+ int val = 0;
+ int ret;
+
+ /*
+ * For the RK3399, the clk of grf must be enabled before writing grf
+ * register. And for RK3288 or other soc, this grf_clk must be NULL,
+ * the clk_prepare_enable return true directly.
+ */
+ ret = clk_prepare_enable(dsi->grf_clk);
+ if (ret) {
+ dev_err(dsi->dev, "Failed to enable grf_clk: %d\n", ret);
+ return;
+ }
+
+ if (dsi->slave) {
+ if (vop_id)
+ val = pdata->dsi0_en_bit |
+ (pdata->dsi0_en_bit << 16) |
+ pdata->dsi1_en_bit |
+ (pdata->dsi1_en_bit << 16);
+ else
+ val = (pdata->dsi0_en_bit << 16) |
+ (pdata->dsi1_en_bit << 16);
+
+ regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);
+
+ if (pdata->grf_dsi0_mode_reg)
+ regmap_write(dsi->grf_regmap, pdata->grf_dsi0_mode_reg,
+ pdata->grf_dsi0_mode);
+ if (pdata->grf_dsi1_mode_reg1)
+ regmap_write(dsi->grf_regmap, pdata->grf_dsi1_mode_reg1,
+ pdata->grf_dsi1_mode);
+ if (pdata->grf_dsi1_mode_reg2)
+ regmap_write(dsi->grf_regmap, pdata->grf_dsi1_mode_reg2,
+ RK3399_GRF_DSI1_MODE2);
+ if (pdata->grf_dsi1_mode_reg1)
+ regmap_write(dsi->grf_regmap, pdata->grf_dsi1_mode_reg1,
+ RK3399_GRF_DSI1_ENABLE);
+ } else {
+ if (vop_id)
+ val = pdata->dsi0_en_bit |
+ (pdata->dsi0_en_bit << 16);
+ else
+ val = pdata->dsi0_en_bit << 16;
+
+ regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);
+
+ if (pdata->grf_dsi0_mode_reg)
+ regmap_write(dsi->grf_regmap, pdata->grf_dsi0_mode_reg,
+ pdata->grf_dsi0_mode);
+ }
+
+ clk_disable_unprepare(dsi->grf_clk);
+}
+
static void dw_mipi_dsi_dpi_config(struct dw_mipi_dsi *dsi,
struct drm_display_mode *mode)
{
@@ -867,7 +968,14 @@ static void dw_mipi_dsi_packet_handler_config(struct dw_mipi_dsi *dsi)
static void dw_mipi_dsi_video_packet_config(struct dw_mipi_dsi *dsi,
struct drm_display_mode *mode)
{
- dsi_write(dsi, DSI_VID_PKT_SIZE, VID_PKT_SIZE(mode->hdisplay));
+ int pkt_size;
+
+ if (dsi->slave || dsi->master)
+ pkt_size = VID_PKT_SIZE(mode->hdisplay / 2 + 4);
+ else
+ pkt_size = VID_PKT_SIZE(mode->hdisplay);
+
+ dsi_write(dsi, DSI_VID_PKT_SIZE, pkt_size);
}

static void dw_mipi_dsi_command_mode_config(struct dw_mipi_dsi *dsi)
@@ -971,24 +1079,24 @@ static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder)

dw_mipi_dsi_disable(dsi);
pm_runtime_put(dsi->dev);
+
+ if (dsi->slave) {
+ if (clk_prepare_enable(dsi->slave->pclk)) {
+ dev_err(dsi->slave->dev, "%s: Failed to enable pclk\n", __func__);
+ return;
+ }
+ dw_mipi_dsi_disable(dsi->slave);
+ pm_runtime_put(dsi->slave->dev);
+ clk_disable_unprepare(dsi->slave->pclk);
+ }
+
clk_disable_unprepare(dsi->pclk);
dsi->dpms_mode = DRM_MODE_DPMS_OFF;
}

-static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
+static void dw_mipi_dsi_enable(struct dw_mipi_dsi *dsi, struct drm_display_mode *mode)
{
- struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
- struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
- const struct dw_mipi_dsi_plat_data *pdata = dsi->pdata;
- int mux = drm_of_encoder_active_endpoint_id(dsi->dev->of_node, encoder);
- u32 val;
- int ret;
-
- ret = dw_mipi_dsi_get_lane_bps(dsi, mode);
- if (ret < 0)
- return;
-
- if (dsi->dpms_mode == DRM_MODE_DPMS_ON)
+ if (dw_mipi_dsi_get_lane_bps(dsi, mode) < 0)
return;

if (clk_prepare_enable(dsi->pclk)) {
@@ -1009,43 +1117,42 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
dw_mipi_dsi_dphy_interface_config(dsi);
dw_mipi_dsi_clear_err(dsi);

- /*
- * For the RK3399, the clk of grf must be enabled before writing grf
- * register. And for RK3288 or other soc, this grf_clk must be NULL,
- * the clk_prepare_enable return true directly.
- */
- ret = clk_prepare_enable(dsi->grf_clk);
- if (ret) {
- dev_err(dsi->dev, "Failed to enable grf_clk: %d\n", ret);
- return;
- }
-
- if (pdata->grf_dsi0_mode_reg)
- regmap_write(dsi->grf_regmap, pdata->grf_dsi0_mode_reg,
- pdata->grf_dsi0_mode);
-
dw_mipi_dsi_phy_init(dsi);
dw_mipi_dsi_wait_for_two_frames(mode);

dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_CMD_MODE);
+}
+
+static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
+{
+ struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
+ struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
+ int mux = drm_of_encoder_active_endpoint_id(dsi->dev->of_node, encoder);
+
+ if (dsi->dpms_mode == DRM_MODE_DPMS_ON)
+ return;
+
+ rockchip_dsi_grf_config(dsi, mux);
+ dev_dbg(dsi->dev, "vop %s output to dsi0\n", (mux) ? "LIT" : "BIG");
+
+ dw_mipi_dsi_enable(dsi, mode);
+ if (dsi->slave)
+ dw_mipi_dsi_enable(dsi->slave, mode);
+
if (drm_panel_prepare(dsi->panel))
dev_err(dsi->dev, "failed to prepare panel\n");

dw_mipi_dsi_set_mode(dsi, DW_MIPI_DSI_VID_MODE);
+ if (dsi->slave)
+ dw_mipi_dsi_set_mode(dsi->slave, DW_MIPI_DSI_VID_MODE);
+
drm_panel_enable(dsi->panel);

clk_disable_unprepare(dsi->pclk);
+ if (dsi->slave)
+ clk_disable_unprepare(dsi->slave->pclk);

- if (mux)
- val = pdata->dsi0_en_bit | (pdata->dsi0_en_bit << 16);
- else
- val = pdata->dsi0_en_bit << 16;
-
- regmap_write(dsi->grf_regmap, pdata->grf_switch_reg, val);
- dev_dbg(dsi->dev, "vop %s output to dsi0\n", (mux) ? "LIT" : "BIG");
dsi->dpms_mode = DRM_MODE_DPMS_ON;
-
- clk_disable_unprepare(dsi->grf_clk);
}

static int
@@ -1073,6 +1180,9 @@ static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)

s->output_type = DRM_MODE_CONNECTOR_DSI;

+ if (dsi->slave)
+ s->output_flags = ROCKCHIP_OUTPUT_DSI_DUAL_CHANNEL;
+
return 0;
}

@@ -1178,6 +1288,12 @@ static int rockchip_mipi_parse_dt(struct dw_mipi_dsi *dsi)
.grf_switch_reg = RK3399_GRF_SOC_CON20,
.grf_dsi0_mode = RK3399_GRF_DSI_MODE,
.grf_dsi0_mode_reg = RK3399_GRF_SOC_CON22,
+ .grf_dsi1_mode = RK3399_GRF_DSI1_MODE1,
+ .grf_dsi1_mode_reg1 = RK3399_GRF_SOC_CON23,
+ .dsi1_basedir = RK3399_TXRX_BASEDIR,
+ .dsi1_masterslavez = RK3399_TXRX_MASTERSLAVEZ,
+ .dsi1_enableclk = RK3399_TXRX_ENABLECLK,
+ .grf_dsi1_mode_reg2 = RK3399_GRF_SOC_CON24,
.flags = DW_MIPI_NEEDS_PHY_CFG_CLK | DW_MIPI_NEEDS_GRF_CLK,
.max_data_lanes = 4,
};
@@ -1194,17 +1310,106 @@ static int rockchip_mipi_parse_dt(struct dw_mipi_dsi *dsi)
};
MODULE_DEVICE_TABLE(of, dw_mipi_dsi_dt_ids);

+
+static int rockchip_dsi_dual_channel_probe(struct dw_mipi_dsi *dsi)
+{
+ struct device_node *np;
+ struct platform_device *secondary;
+
+ np = of_parse_phandle(dsi->dev->of_node, "rockchip,dual-channel", 0);
+ if (np) {
+ secondary = of_find_device_by_node(np);
+ dsi->slave = platform_get_drvdata(secondary);
+ of_node_put(np);
+
+ if (!dsi->slave)
+ return -EPROBE_DEFER;
+
+ dsi->slave->master = dsi;
+ }
+
+ return 0;
+}
+
static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
void *data)
{
+ struct drm_device *drm = data;
+ struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
+ int ret;
+
+ ret = rockchip_dsi_dual_channel_probe(dsi);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(dsi->pllref_clk);
+ if (ret) {
+ dev_err(dev, "%s: Failed to enable pllref_clk\n", __func__);
+ return ret;
+ }
+
+ pm_runtime_enable(dev);
+
+ if (dsi->master)
+ return 0;
+
+ ret = dw_mipi_dsi_register(drm, dsi);
+ if (ret) {
+ dev_err(dev, "Failed to register mipi_dsi: %d\n", ret);
+ goto err_pllref;
+ }
+
+ dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
+ dsi->dsi_host.dev = dev;
+ ret = mipi_dsi_host_register(&dsi->dsi_host);
+ if (ret) {
+ dev_err(dev, "Failed to register MIPI host: %d\n", ret);
+ goto err_cleanup;
+ }
+
+ if (!dsi->panel) {
+ ret = -EPROBE_DEFER;
+ goto err_mipi_dsi_host;
+ }
+
+ return 0;
+
+err_mipi_dsi_host:
+ mipi_dsi_host_unregister(&dsi->dsi_host);
+err_cleanup:
+ drm_encoder_cleanup(&dsi->encoder);
+ drm_connector_cleanup(&dsi->connector);
+err_pllref:
+ clk_disable_unprepare(dsi->pllref_clk);
+ return ret;
+}
+
+static void dw_mipi_dsi_unbind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
+
+ mipi_dsi_host_unregister(&dsi->dsi_host);
+ pm_runtime_disable(dev);
+ if (dsi->slave)
+ pm_runtime_disable(dsi->slave->dev);
+ clk_disable_unprepare(dsi->pllref_clk);
+}
+
+static const struct component_ops dw_mipi_dsi_ops = {
+ .bind = dw_mipi_dsi_bind,
+ .unbind = dw_mipi_dsi_unbind,
+};
+
+static int dw_mipi_dsi_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
const struct of_device_id *of_id =
of_match_device(dw_mipi_dsi_dt_ids, dev);
const struct dw_mipi_dsi_plat_data *pdata = of_id->data;
- struct platform_device *pdev = to_platform_device(dev);
- struct reset_control *apb_rst;
- struct drm_device *drm = data;
struct dw_mipi_dsi *dsi;
struct resource *res;
+ struct reset_control *apb_rst;
int ret;

dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
@@ -1214,6 +1419,7 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
dsi->dev = dev;
dsi->pdata = pdata;
dsi->dpms_mode = DRM_MODE_DPMS_OFF;
+ dev_set_drvdata(dev, dsi);

ret = rockchip_mipi_parse_dt(dsi);
if (ret)
@@ -1288,63 +1494,6 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master,
}
}

- ret = clk_prepare_enable(dsi->pllref_clk);
- if (ret) {
- dev_err(dev, "%s: Failed to enable pllref_clk\n", __func__);
- return ret;
- }
-
- ret = dw_mipi_dsi_register(drm, dsi);
- if (ret) {
- dev_err(dev, "Failed to register mipi_dsi: %d\n", ret);
- goto err_pllref;
- }
-
- pm_runtime_enable(dev);
-
- dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
- dsi->dsi_host.dev = dev;
- ret = mipi_dsi_host_register(&dsi->dsi_host);
- if (ret) {
- dev_err(dev, "Failed to register MIPI host: %d\n", ret);
- goto err_cleanup;
- }
-
- if (!dsi->panel) {
- ret = -EPROBE_DEFER;
- goto err_mipi_dsi_host;
- }
-
- dev_set_drvdata(dev, dsi);
- return 0;
-
-err_mipi_dsi_host:
- mipi_dsi_host_unregister(&dsi->dsi_host);
-err_cleanup:
- drm_encoder_cleanup(&dsi->encoder);
- drm_connector_cleanup(&dsi->connector);
-err_pllref:
- clk_disable_unprepare(dsi->pllref_clk);
- return ret;
-}
-
-static void dw_mipi_dsi_unbind(struct device *dev, struct device *master,
- void *data)
-{
- struct dw_mipi_dsi *dsi = dev_get_drvdata(dev);
-
- mipi_dsi_host_unregister(&dsi->dsi_host);
- pm_runtime_disable(dev);
- clk_disable_unprepare(dsi->pllref_clk);
-}
-
-static const struct component_ops dw_mipi_dsi_ops = {
- .bind = dw_mipi_dsi_bind,
- .unbind = dw_mipi_dsi_unbind,
-};
-
-static int dw_mipi_dsi_probe(struct platform_device *pdev)
-{
return component_add(&pdev->dev, &dw_mipi_dsi_ops);
}

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
index c7e96b8..51ad1c2 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
@@ -36,6 +36,7 @@ struct rockchip_crtc_state {
struct drm_crtc_state base;
int output_type;
int output_mode;
+ int output_flags;
};
#define to_rockchip_crtc_state(s) \
container_of(s, struct rockchip_crtc_state, base)
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index bf9ed0e..cb40cdd 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -917,6 +917,8 @@ static void vop_crtc_atomic_enable(struct drm_crtc *crtc,
case DRM_MODE_CONNECTOR_DSI:
VOP_REG_SET(vop, output, mipi_pin_pol, pin_pol);
VOP_REG_SET(vop, output, mipi_en, 1);
+ VOP_REG_SET(vop, output, mipi_dual_channel_en,
+ !!(s->output_flags & ROCKCHIP_OUTPUT_DSI_DUAL_CHANNEL));
break;
case DRM_MODE_CONNECTOR_DisplayPort:
pin_pol &= ~BIT(DCLK_INVERT);
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
index 56bbd2e..d184531 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.h
@@ -60,6 +60,7 @@ struct vop_output {
struct vop_reg edp_en;
struct vop_reg hdmi_en;
struct vop_reg mipi_en;
+ struct vop_reg mipi_dual_channel_en;
struct vop_reg rgb_en;
};

@@ -212,6 +213,8 @@ struct vop_data {
/* for use special outface */
#define ROCKCHIP_OUT_MODE_AAAA 15

+#define ROCKCHIP_OUTPUT_DSI_DUAL_CHANNEL BIT(0)
+
enum alpha_mode {
ALPHA_STRAIGHT,
ALPHA_INVERSE,
--
1.9.1

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