phy: rockchip: samsung-hdptx: Add high color depth management

Add support for 8-bit, 10-bit, 12-bit and 16-bit color depth setup.

Reviewed-by: Dmitry Baryshkov <[email protected]>
Signed-off-by: Cristian Ciocaltea <[email protected]>
Reviewed-by: Dmitry Baryshkov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: cristicc

drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c

@@ -1028,6 +1028,9 @@ static int rk_hdptx_ropll_tmds_cmn_config(struct rk_hdptx_phy *hdptx)
 	regmap_update_bits(hdptx->regmap, CMN_REG(0086), PLL_PCG_POSTDIV_SEL_MASK,
 			   FIELD_PREP(PLL_PCG_POSTDIV_SEL_MASK, cfg->pms_sdiv));
 
+	regmap_update_bits(hdptx->regmap, CMN_REG(0086), PLL_PCG_CLK_SEL_MASK,
+			   FIELD_PREP(PLL_PCG_CLK_SEL_MASK, (hdptx->hdmi_cfg.bpc - 8) >> 1));
+
 	regmap_update_bits(hdptx->regmap, CMN_REG(0086), PLL_PCG_CLK_EN_MASK,
 			   FIELD_PREP(PLL_PCG_CLK_EN_MASK, 0x1));
 
@@ -1427,7 +1430,8 @@ static int rk_hdptx_phy_power_on(struct phy *phy)
 			hdptx->hdmi_cfg.tmds_char_rate *= 100;
 		}
 
-		dev_dbg(hdptx->dev, "%s rate=%llu\n", __func__, hdptx->hdmi_cfg.tmds_char_rate);
+		dev_dbg(hdptx->dev, "%s rate=%llu bpc=%u\n", __func__,
+			hdptx->hdmi_cfg.tmds_char_rate, hdptx->hdmi_cfg.bpc);
 	}
 
 	ret = rk_hdptx_phy_consumer_get(hdptx);
@@ -1492,6 +1496,19 @@ static int rk_hdptx_phy_verify_hdmi_config(struct rk_hdptx_phy *hdptx,
 	    !rk_hdptx_phy_clk_pll_calc(hdmi->tmds_char_rate, NULL))
 		return -EINVAL;
 
+	if (!hdmi->bpc)
+		hdmi->bpc = 8;
+
+	switch (hdmi->bpc) {
+	case 8:
+	case 10:
+	case 12:
+	case 16:
+		break;
+	default:
+		return -EINVAL;
+	};
+
 	return 0;
 }
 
@@ -1764,6 +1781,9 @@ static int rk_hdptx_phy_configure(struct phy *phy, union phy_configure_opts *opt
 			hdptx->hdmi_cfg = opts->hdmi;
 			hdptx->restrict_rate_change = true;
 		}
+
+		dev_dbg(hdptx->dev, "%s rate=%llu bpc=%u\n", __func__,
+			hdptx->hdmi_cfg.tmds_char_rate, hdptx->hdmi_cfg.bpc);
 		return ret;
 	}
 
@@ -1972,6 +1992,7 @@ static int rk_hdptx_phy_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	hdptx->dev = dev;
+	hdptx->hdmi_cfg.bpc = 8;
 
 	regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
 	if (IS_ERR(regs))