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drm/bridge: lt9611: fix sync polarity for DVI output

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Attaching DVI sink to the lt9611 requires different setup. Fix the
register write to make the DVI displays sync onto the correct sync
pulse.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230118081658.2198520-10-dmitry.baryshkov@linaro.org
This commit is contained in:
Dmitry Baryshkov
2023-01-18 10:16:54 +02:00
committed by Neil Armstrong
parent 0c3997b0fe
commit 0c74746948
1 changed files with 6 additions and 3 deletions
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9
drivers/gpu/drm/bridge/lontium-lt9611.c
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@@ -353,13 +353,16 @@ static int lt9611_video_check(struct lt9611 *lt9611)
return temp;
}
static void lt9611_hdmi_tx_digital(struct lt9611 *lt9611)
static void lt9611_hdmi_tx_digital(struct lt9611 *lt9611, bool is_hdmi)
{
regmap_write(lt9611->regmap, 0x8443, 0x46 - lt9611->vic);
regmap_write(lt9611->regmap, 0x8447, lt9611->vic);
regmap_write(lt9611->regmap, 0x843d, 0x0a); /* UD1 infoframe */
regmap_write(lt9611->regmap, 0x82d6, 0x8c);
if (is_hdmi)
regmap_write(lt9611->regmap, 0x82d6, 0x8c);
else
regmap_write(lt9611->regmap, 0x82d6, 0x0c);
regmap_write(lt9611->regmap, 0x82d7, 0x04);
}
@@ -720,7 +723,7 @@ lt9611_bridge_atomic_enable(struct drm_bridge *bridge,
}
lt9611_mipi_input_analog(lt9611);
lt9611_hdmi_tx_digital(lt9611);
lt9611_hdmi_tx_digital(lt9611, connector->display_info.is_hdmi);
lt9611_hdmi_tx_phy(lt9611);
msleep(500);