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drm/mediatek: Disable tmds on mt2701

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Without that patch if you use specific resolutions like 1280x1024,
I can see distortion in the output. It seems as if the
frequency for updating the pixel of the image is out of sync.

For initialization tmds needs to be active, but can be disabled after init
to fix blurry display

Signed-off-by: chunhui dai <chunhui.dai@mediatek.com>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Tested-by: Frank Wunderlich <frank-w@public-files.de>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
This commit is contained in:
chunhui dai 2020-09-04 12:59:59 +02:00 committed by Chun-Kuang Hu
parent f89c696e7f
commit 09e872d558
3 changed files with 5 additions and 0 deletions
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1
drivers/phy/mediatek/phy-mtk-hdmi-mt2701.c
View File

@ -238,6 +238,7 @@ static void mtk_hdmi_phy_disable_tmds(struct mtk_hdmi_phy *hdmi_phy)
struct mtk_hdmi_phy_conf mtk_hdmi_phy_2701_conf = {
.flags = CLK_SET_RATE_GATE,
.pll_default_off = true,
.hdmi_phy_clk_ops = &mtk_hdmi_phy_pll_ops,
.hdmi_phy_enable_tmds = mtk_hdmi_phy_enable_tmds,
.hdmi_phy_disable_tmds = mtk_hdmi_phy_disable_tmds,

3
drivers/phy/mediatek/phy-mtk-hdmi.c
View File

@ -184,6 +184,9 @@ static int mtk_hdmi_phy_probe(struct platform_device *pdev)
return PTR_ERR(phy_provider);
}
if (hdmi_phy->conf->pll_default_off)
hdmi_phy->conf->hdmi_phy_disable_tmds(hdmi_phy);
return of_clk_add_provider(dev->of_node, of_clk_src_simple_get,
hdmi_phy->pll);
}

1
drivers/phy/mediatek/phy-mtk-hdmi.h
View File

@ -21,6 +21,7 @@ struct mtk_hdmi_phy;
struct mtk_hdmi_phy_conf {
unsigned long flags;
bool pll_default_off;
const struct clk_ops *hdmi_phy_clk_ops;
void (*hdmi_phy_enable_tmds)(struct mtk_hdmi_phy *hdmi_phy);
void (*hdmi_phy_disable_tmds)(struct mtk_hdmi_phy *hdmi_phy);