6.15-stable review patch. If anyone has any objections, please let me know.
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From: Andy Yan andy.yan@rock-chips.com
[ Upstream commit ad10b82c2bcac7f87ac6eaecfca33378b43425ee ]
The HSYNC/VSYNC polarity of rk3036 HDMI are controlled by GRF. Without the polarity configuration in GRF, it can be observed from the HDMI protocol analyzer that the H/V front/back timing output by RK3036 HDMI are currently not in line with the specifications.
Signed-off-by: Andy Yan andy.yan@rock-chips.com Tested-by: Heiko Stuebner heiko@sntech.de #rk3036-kylin Signed-off-by: Heiko Stuebner heiko@sntech.de Link: https://lore.kernel.org/r/20250422070455.432666-5-andyshrk@163.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/rockchip/inno_hdmi.c | 36 +++++++++++++++++++++++++++- 1 file changed, 35 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/rockchip/inno_hdmi.c b/drivers/gpu/drm/rockchip/inno_hdmi.c index 483ecfeaebb08..87dfd30001583 100644 --- a/drivers/gpu/drm/rockchip/inno_hdmi.c +++ b/drivers/gpu/drm/rockchip/inno_hdmi.c @@ -10,10 +10,12 @@ #include <linux/delay.h> #include <linux/err.h> #include <linux/hdmi.h> +#include <linux/mfd/syscon.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/platform_device.h> +#include <linux/regmap.h>
#include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> @@ -29,8 +31,19 @@
#include "inno_hdmi.h"
+#define HIWORD_UPDATE(val, mask) ((val) | (mask) << 16) + #define INNO_HDMI_MIN_TMDS_CLOCK 25000000U
+#define RK3036_GRF_SOC_CON2 0x148 +#define RK3036_HDMI_PHSYNC BIT(4) +#define RK3036_HDMI_PVSYNC BIT(5) + +enum inno_hdmi_dev_type { + RK3036_HDMI, + RK3128_HDMI, +}; + struct inno_hdmi_phy_config { unsigned long pixelclock; u8 pre_emphasis; @@ -38,6 +51,7 @@ struct inno_hdmi_phy_config { };
struct inno_hdmi_variant { + enum inno_hdmi_dev_type dev_type; struct inno_hdmi_phy_config *phy_configs; struct inno_hdmi_phy_config *default_phy_config; }; @@ -58,6 +72,7 @@ struct inno_hdmi { struct clk *pclk; struct clk *refclk; void __iomem *regs; + struct regmap *grf;
struct drm_connector connector; struct rockchip_encoder encoder; @@ -374,7 +389,15 @@ static int inno_hdmi_config_video_csc(struct inno_hdmi *hdmi) static int inno_hdmi_config_video_timing(struct inno_hdmi *hdmi, struct drm_display_mode *mode) { - int value; + int value, psync; + + if (hdmi->variant->dev_type == RK3036_HDMI) { + psync = mode->flags & DRM_MODE_FLAG_PHSYNC ? RK3036_HDMI_PHSYNC : 0; + value = HIWORD_UPDATE(psync, RK3036_HDMI_PHSYNC); + psync = mode->flags & DRM_MODE_FLAG_PVSYNC ? RK3036_HDMI_PVSYNC : 0; + value |= HIWORD_UPDATE(psync, RK3036_HDMI_PVSYNC); + regmap_write(hdmi->grf, RK3036_GRF_SOC_CON2, value); + }
/* Set detail external video timing polarity and interlace mode */ value = v_EXTERANL_VIDEO(1); @@ -911,6 +934,15 @@ static int inno_hdmi_bind(struct device *dev, struct device *master, goto err_disable_pclk; }
+ if (hdmi->variant->dev_type == RK3036_HDMI) { + hdmi->grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,grf"); + if (IS_ERR(hdmi->grf)) { + ret = dev_err_probe(dev, PTR_ERR(hdmi->grf), + "Unable to get rockchip,grf\n"); + goto err_disable_clk; + } + } + irq = platform_get_irq(pdev, 0); if (irq < 0) { ret = irq; @@ -995,11 +1027,13 @@ static void inno_hdmi_remove(struct platform_device *pdev) }
static const struct inno_hdmi_variant rk3036_inno_hdmi_variant = { + .dev_type = RK3036_HDMI, .phy_configs = rk3036_hdmi_phy_configs, .default_phy_config = &rk3036_hdmi_phy_configs[1], };
static const struct inno_hdmi_variant rk3128_inno_hdmi_variant = { + .dev_type = RK3128_HDMI, .phy_configs = rk3128_hdmi_phy_configs, .default_phy_config = &rk3128_hdmi_phy_configs[1], };