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drm/msm/dp: Support the eDP modes given by panel

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The eDP controller does not have a reliable way keep panel
powered on to read the sink capabilities. So, the controller
driver cannot validate if a mode can be supported by the
source. We will rely on the panel driver to populate only
the supported modes for now.

Signed-off-by: Sankeerth Billakanti <quic_sbillaka@quicinc.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Patchwork: https://patchwork.freedesktop.org/patch/483313/
Link: https://lore.kernel.org/r/1650887072-16652-5-git-send-email-quic_sbillaka@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Sankeerth Billakanti 2022-04-25 17:14:32 +05:30 • committed by Dmitry Baryshkov
parent 86d56a7704
commit 3bc965f15e
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/msm/dp/dp_display.c
View file

@ -980,6 +980,14 @@ enum drm_mode_status dp_bridge_mode_valid(struct drm_bridge *bridge,
return -EINVAL;
}
/*
* The eDP controller currently does not have a reliable way of
* enabling panel power to read sink capabilities. So, we rely
* on the panel driver to populate only supported modes for now.
*/
if (dp->is_edp)
return MODE_OK;
if (mode->clock > DP_MAX_PIXEL_CLK_KHZ)
return MODE_BAD;