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drm/amd/display: Only set default brightness for OLED

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[Why]
We used to unconditionally set backlight path as AUX for panels capable
of backlight adjustment via DPCD in set default brightness.

[How]
This should be limited to OLED panel only since we control backlight via
PWM path for SDR mode in LCD HDR panel.

Reviewed-by: Krunoslav Kovac <krunoslav.kovac@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Camille Cho <Camille.Cho@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Camille Cho 2021-07-08 18:28:37 +08:00 committed by Alex Deucher
parent a8e380fd8d
commit 2d73eabe29
1 changed files with 1 additions and 3 deletions
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4
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
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@ -4914,9 +4914,7 @@ bool dc_link_set_default_brightness_aux(struct dc_link *link)
{
uint32_t default_backlight;
if (link &&
(link->dpcd_sink_ext_caps.bits.hdr_aux_backlight_control == 1 ||
link->dpcd_sink_ext_caps.bits.sdr_aux_backlight_control == 1)) {
if (link && link->dpcd_sink_ext_caps.bits.oled == 1) {
if (!dc_link_read_default_bl_aux(link, &default_backlight))
default_backlight = 150000;
// if < 5 nits or > 5000, it might be wrong readback