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drm/bridge: lt9611: fix HPD reenablement
[ Upstream commita7790f6bd3
] The driver will reset the bridge in the atomic_pre_enable(). However this will also drop the HPD interrupt state. Instead of resetting the bridge, properly wake it up. This fixes the HPD interrupt delivery after the disable/enable cycle. Fixes:23278bf54a
("drm/bridge: Introduce LT9611 DSI to HDMI bridge") 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/20230118081658.2198520-3-dmitry.baryshkov@linaro.org Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 8 additions and 2 deletions
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@ -856,12 +856,18 @@ static enum drm_mode_status lt9611_bridge_mode_valid(struct drm_bridge *bridge,
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static void lt9611_bridge_pre_enable(struct drm_bridge *bridge)
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{
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struct lt9611 *lt9611 = bridge_to_lt9611(bridge);
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static const struct reg_sequence reg_cfg[] = {
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{ 0x8102, 0x12 },
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{ 0x8123, 0x40 },
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{ 0x8130, 0xea },
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{ 0x8011, 0xfa },
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};
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if (!lt9611->sleep)
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return;
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lt9611_reset(lt9611);
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regmap_write(lt9611->regmap, 0x80ee, 0x01);
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regmap_multi_reg_write(lt9611->regmap,
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reg_cfg, ARRAY_SIZE(reg_cfg));
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lt9611->sleep = false;
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}
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