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drm/amd/display: Check frame skip capability in Sink side

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[Why&How]
Frame skip capability is described in AMD VSDB in EDID.
Need to retrieve the cap and determine fr.skipping mode enablement

Reviewed-by: ChunTao Tso <chuntao.tso@amd.com>
Signed-off-by: Leon Huang <Leon.Huang1@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Leon Huang 2026-01-20 16:04:09 +08:00 committed by Alex Deucher
parent 1a38ded4bc
commit d2ca311a83
1 changed files with 10 additions and 0 deletions
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10
drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_panel_replay.c
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@ -34,6 +34,7 @@
link->ctx->logger
#define DP_SINK_PR_ENABLE_AND_CONFIGURATION 0x37B
#define DP_SINK_ENABLE_FRAME_SKIPPING_MODE_SHIFT (5)
static unsigned int dp_pr_calc_num_static_frames(unsigned int vsync_rate_hz)
{
@ -89,6 +90,7 @@ static bool dp_setup_panel_replay(struct dc_link *link, const struct dc_stream_s
union panel_replay_enable_and_configuration_2 pr_config_2 = { 0 };
union dpcd_alpm_configuration alpm_config;
uint8_t data = 0;
replay_context.controllerId = CONTROLLER_ID_UNDEFINED;
@ -186,6 +188,14 @@ static bool dp_setup_panel_replay(struct dc_link *link, const struct dc_stream_s
DP_RECEIVER_ALPM_CONFIG,
&alpm_config.raw,
sizeof(alpm_config.raw));
//Enable frame skipping
if (link->replay_settings.config.frame_skip_supported)
data = data | (1 << DP_SINK_ENABLE_FRAME_SKIPPING_MODE_SHIFT);
dm_helpers_dp_write_dpcd(link->ctx, link,
DP_SINK_PR_ENABLE_AND_CONFIGURATION,
(uint8_t *)&(data), sizeof(uint8_t));
}
return true;