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Subject[PATCH v3 12/14] drm/sun4i: hdmi: Add support for A31's HDMI controller
Date
The HDMI controller found in the A31 SoCs is slightly different
from the one already supported, which is found in the A10s:

- Need different initial values for the PLL related registers

- Different behavior of the DDC and TMDS clocks

- Different register layout for the DDC portion

- Separate DDC parent clock

This patch adds support for it.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
---
drivers/gpu/drm/sun4i/sun4i_hdmi.h | 3 ++
drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c | 58 ++++++++++++++++++++++++++++++++++
2 files changed, 61 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi.h b/drivers/gpu/drm/sun4i/sun4i_hdmi.h
index da4ea9efc6fa..186624de9b60 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi.h
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi.h
@@ -59,10 +59,13 @@
#define SUN4I_HDMI_PAD_CTRL0_TXEN BIT(23)

#define SUN4I_HDMI_PAD_CTRL1_REG 0x204
+#define SUN4I_HDMI_PAD_CTRL1_UNKNOWN BIT(24) /* set on A31 */
#define SUN4I_HDMI_PAD_CTRL1_AMP_OPT BIT(23)
#define SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT BIT(22)
#define SUN4I_HDMI_PAD_CTRL1_EMP_OPT BIT(20)
#define SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT BIT(19)
+#define SUN4I_HDMI_PAD_CTRL1_PWSCK BIT(18)
+#define SUN4I_HDMI_PAD_CTRL1_PWSDT BIT(17)
#define SUN4I_HDMI_PAD_CTRL1_REG_DEN BIT(15)
#define SUN4I_HDMI_PAD_CTRL1_REG_DENCK BIT(14)
#define SUN4I_HDMI_PAD_CTRL1_REG_EMP(n) (((n) & 7) << 10)
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
index 114cbe60b3e6..027b5608dbe6 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
@@ -324,6 +324,63 @@ static const struct sun4i_hdmi_variant sun5i_variant = {
.ddc_fifo_has_dir = true,
};

+static const struct sun4i_hdmi_variant sun6i_variant = {
+ .has_ddc_parent_clk = true,
+ .has_reset_control = true,
+ .pad_ctrl0_init_val = 0xff |
+ SUN4I_HDMI_PAD_CTRL0_TXEN |
+ SUN4I_HDMI_PAD_CTRL0_CKEN |
+ SUN4I_HDMI_PAD_CTRL0_PWENG |
+ SUN4I_HDMI_PAD_CTRL0_PWEND |
+ SUN4I_HDMI_PAD_CTRL0_PWENC |
+ SUN4I_HDMI_PAD_CTRL0_LDODEN |
+ SUN4I_HDMI_PAD_CTRL0_LDOCEN,
+ .pad_ctrl1_init_val = SUN4I_HDMI_PAD_CTRL1_REG_AMP(6) |
+ SUN4I_HDMI_PAD_CTRL1_REG_EMP(4) |
+ SUN4I_HDMI_PAD_CTRL1_REG_DENCK |
+ SUN4I_HDMI_PAD_CTRL1_REG_DEN |
+ SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT |
+ SUN4I_HDMI_PAD_CTRL1_EMP_OPT |
+ SUN4I_HDMI_PAD_CTRL1_PWSDT |
+ SUN4I_HDMI_PAD_CTRL1_PWSCK |
+ SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT |
+ SUN4I_HDMI_PAD_CTRL1_AMP_OPT |
+ SUN4I_HDMI_PAD_CTRL1_UNKNOWN,
+ .pll_ctrl_init_val = SUN4I_HDMI_PLL_CTRL_VCO_S(8) |
+ SUN4I_HDMI_PLL_CTRL_CS(3) |
+ SUN4I_HDMI_PLL_CTRL_CP_S(10) |
+ SUN4I_HDMI_PLL_CTRL_S(4) |
+ SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) |
+ SUN4I_HDMI_PLL_CTRL_SDIV2 |
+ SUN4I_HDMI_PLL_CTRL_LDO2_EN |
+ SUN4I_HDMI_PLL_CTRL_LDO1_EN |
+ SUN4I_HDMI_PLL_CTRL_HV_IS_33 |
+ SUN4I_HDMI_PLL_CTRL_PLL_EN,
+
+ .ddc_clk_reg = REG_FIELD(SUN6I_HDMI_DDC_CLK_REG, 0, 6),
+ .ddc_clk_pre_divider = 1,
+ .ddc_clk_m_offset = 2,
+
+ .tmds_clk_div_offset = 1,
+
+ .field_ddc_en = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 0, 0),
+ .field_ddc_start = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 27, 27),
+ .field_ddc_reset = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 31, 31),
+ .field_ddc_addr_reg = REG_FIELD(SUN6I_HDMI_DDC_ADDR_REG, 1, 31),
+ .field_ddc_slave_addr = REG_FIELD(SUN6I_HDMI_DDC_ADDR_REG, 1, 7),
+ .field_ddc_int_status = REG_FIELD(SUN6I_HDMI_DDC_INT_STATUS_REG, 0, 8),
+ .field_ddc_fifo_clear = REG_FIELD(SUN6I_HDMI_DDC_FIFO_CTRL_REG, 18, 18),
+ .field_ddc_fifo_rx_thres = REG_FIELD(SUN6I_HDMI_DDC_FIFO_CTRL_REG, 4, 7),
+ .field_ddc_fifo_tx_thres = REG_FIELD(SUN6I_HDMI_DDC_FIFO_CTRL_REG, 0, 3),
+ .field_ddc_byte_count = REG_FIELD(SUN6I_HDMI_DDC_CMD_REG, 16, 25),
+ .field_ddc_cmd = REG_FIELD(SUN6I_HDMI_DDC_CMD_REG, 0, 2),
+ .field_ddc_sda_en = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 6, 6),
+ .field_ddc_sck_en = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 4, 4),
+
+ .ddc_fifo_reg = SUN6I_HDMI_DDC_FIFO_DATA_REG,
+ .ddc_fifo_thres_incl = true,
+};
+
static const struct regmap_config sun4i_hdmi_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
@@ -551,6 +608,7 @@ static int sun4i_hdmi_remove(struct platform_device *pdev)

static const struct of_device_id sun4i_hdmi_of_table[] = {
{ .compatible = "allwinner,sun5i-a10s-hdmi", .data = &sun5i_variant, },
+ { .compatible = "allwinner,sun6i-a31-hdmi", .data = &sun6i_variant, },
{ }
};
MODULE_DEVICE_TABLE(of, sun4i_hdmi_of_table);
--
2.14.2
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