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linux (Rockchip): BACKPORT: drm/rockchip: dw_hdmi: Filter modes based on hdmiphy_clk

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This commit is contained in:
ilmich 2024-12-15 12:40:15 +01:00
parent c1955650b8
commit 6fbf1d093a
1 changed files with 95 additions and 0 deletions
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95
projects/Rockchip/patches/linux/default/linux-1000-drm-rockchip.patch
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@ -2834,3 +2834,98 @@ index 49619f794061..9915bf124374 100644
}
port = of_get_child_by_name(dev->of_node, "port");
From 3303a206ae7474b2f8a5d17d8df9de08bac16ca5 Mon Sep 17 00:00:00 2001
From: Jonas Karlman <jonas@kwiboo.se>
Date: Sun, 8 Sep 2024 14:54:58 +0000
Subject: [PATCH] drm/rockchip: dw_hdmi: Filter modes based on hdmiphy_clk
RK3228 and RK3328 clock rate is being validated against a mpll config
table intended for a Synopsys phy, and not the used inno-hdmi-phy.
Instead get a reference to the hdmiphy clk and validate rates against
it to enable use of HDMI2.0 modes, e.g. 4K@60Hz, on RK3228 and RK3328.
For Synopsis phy the max_tmds_clock validation is sufficient.
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Tested-by: Diederik de Haas <didi.debian@cknow.org> # Rock64
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240908145511.3331451-2-jonas@kwiboo.se
---
drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 35 ++++++++++-----------
1 file changed, 17 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index 240552eb517f7e..36cc700766fd82 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -76,6 +76,7 @@ struct rockchip_hdmi {
struct rockchip_encoder encoder;
const struct rockchip_hdmi_chip_data *chip_data;
const struct dw_hdmi_plat_data *plat_data;
+ struct clk *hdmiphy_clk;
struct clk *ref_clk;
struct clk *grf_clk;
struct dw_hdmi *hdmi;
@@ -251,10 +252,7 @@ dw_hdmi_rockchip_mode_valid(struct dw_hdmi *dw_hdmi, void *data,
const struct drm_display_mode *mode)
{
struct rockchip_hdmi *hdmi = data;
- const struct dw_hdmi_mpll_config *mpll_cfg = rockchip_mpll_cfg;
int pclk = mode->clock * 1000;
- bool exact_match = hdmi->plat_data->phy_force_vendor;
- int i;
if (hdmi->chip_data->max_tmds_clock &&
mode->clock > hdmi->chip_data->max_tmds_clock)
@@ -263,26 +261,18 @@ dw_hdmi_rockchip_mode_valid(struct dw_hdmi *dw_hdmi, void *data,
if (hdmi->ref_clk) {
int rpclk = clk_round_rate(hdmi->ref_clk, pclk);
- if (abs(rpclk - pclk) > pclk / 1000)
+ if (rpclk < 0 || abs(rpclk - pclk) > pclk / 1000)
return MODE_NOCLOCK;
}
- for (i = 0; mpll_cfg[i].mpixelclock != (~0UL); i++) {
- /*
- * For vendor specific phys force an exact match of the pixelclock
- * to preserve the original behaviour of the driver.
- */
- if (exact_match && pclk == mpll_cfg[i].mpixelclock)
- return MODE_OK;
- /*
- * The Synopsys phy can work with pixelclocks up to the value given
- * in the corresponding mpll_cfg entry.
- */
- if (!exact_match && pclk <= mpll_cfg[i].mpixelclock)
- return MODE_OK;
+ if (hdmi->hdmiphy_clk) {
+ int rpclk = clk_round_rate(hdmi->hdmiphy_clk, pclk);
+
+ if (rpclk < 0 || abs(rpclk - pclk) > pclk / 1000)
+ return MODE_NOCLOCK;
}
- return MODE_BAD;
+ return MODE_OK;
}
static void dw_hdmi_rockchip_encoder_disable(struct drm_encoder *encoder)
@@ -607,6 +597,15 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
return ret;
}
+ if (hdmi->phy) {
+ struct of_phandle_args clkspec;
+
+ clkspec.np = hdmi->phy->dev.of_node;
+ hdmi->hdmiphy_clk = of_clk_get_from_provider(&clkspec);
+ if (IS_ERR(hdmi->hdmiphy_clk))
+ hdmi->hdmiphy_clk = NULL;
+ }
+
if (hdmi->chip_data == &rk3568_chip_data) {
regmap_write(hdmi->regmap, RK3568_GRF_VO_CON1,
HIWORD_UPDATE(RK3568_HDMI_SDAIN_MSK |