diff options
| author | Roy Chan <roy.chan@amd.com> | 2020-10-30 18:00:02 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-11-16 12:19:17 -0500 |
| commit | 65e870dfa6741e0c1199946faa4a1113bfb23916 (patch) | |
| tree | 4e0df38fac0ba4d349139a0bdec19fee25f1e74d /drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | |
| parent | 786b4061742be1b494f1ca046c385717e6aa4434 (diff) | |
drm/amd/display: Detect dynamic backlight support in eDP sink
[Why]
Check if the eDP sink supports the dynamic backlight control
[How]
Query the dynamic backlight capability in DPCD (eDP case only)
Signed-off-by: Roy Chan <roy.chan@amd.com>
Acked-by: Bindu Ramamurthy <bindu.r@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index f2023d2b5323..1dfcaf1acbfc 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -3745,6 +3745,7 @@ void detect_edp_sink_caps(struct dc_link *link) uint32_t entry; uint32_t link_rate_in_khz; enum dc_link_rate link_rate = LINK_RATE_UNKNOWN; + uint8_t backlight_adj_cap; retrieve_link_cap(link); link->dpcd_caps.edp_supported_link_rates_count = 0; @@ -3775,6 +3776,12 @@ void detect_edp_sink_caps(struct dc_link *link) } link->verified_link_cap = link->reported_link_cap; + core_link_read_dpcd(link, DP_EDP_BACKLIGHT_ADJUSTMENT_CAP, + &backlight_adj_cap, sizeof(backlight_adj_cap)); + + link->dpcd_caps.dynamic_backlight_capable_edp = + (backlight_adj_cap & DP_EDP_DYNAMIC_BACKLIGHT_CAP) ? true:false; + dc_link_set_default_brightness_aux(link); } |