From: Nicholas Kazlauskas nicholas.kazlauskas@amd.com

[Why] Idle optimizations are blocked if there's more than one eDP connector on the board - blocking S0i3 and IPS2 for static screen.

[How] Fix the checks to correctly detect number of active eDP. Also restrict the eDP support to panels that have correct feature support.

Cc: Mario Limonciello mario.limonciello@amd.com Cc: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Reviewed-by: Charlene Liu charlene.liu@amd.com Acked-by: Tom Chung chiahsuan.chung@amd.com Signed-off-by: Nicholas Kazlauskas nicholas.kazlauskas@amd.com --- .../amd/display/dc/hwss/dcn35/dcn35_hwseq.c | 33 +++++++++++++++---- 1 file changed, 27 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c index 1c71a5d4ac5d..bddcd23a2727 100644 --- a/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/hwss/dcn35/dcn35_hwseq.c @@ -660,22 +660,43 @@ void dcn35_power_down_on_boot(struct dc *dc)

bool dcn35_apply_idle_power_optimizations(struct dc *dc, bool enable) { - struct dc_link *edp_links[MAX_NUM_EDP]; - int i, edp_num; if (dc->debug.dmcub_emulation) return true;

if (enable) { - dc_get_edp_links(dc, edp_links, &edp_num); - if (edp_num == 0 || edp_num > 1) - return false; + uint32_t num_active_edp = 0; + int i;

for (i = 0; i < dc->current_state->stream_count; ++i) { struct dc_stream_state *stream = dc->current_state->streams[i]; + struct dc_link *link = stream->link; + bool is_psr = link && !link->panel_config.psr.disable_psr && + (link->psr_settings.psr_version == DC_PSR_VERSION_1 || + link->psr_settings.psr_version == DC_PSR_VERSION_SU_1); + bool is_replay = link && link->replay_settings.replay_feature_enabled; + + /* Ignore streams that disabled. */ + if (stream->dpms_off) + continue; + + /* Active external displays block idle optimizations. */ + if (!dc_is_embedded_signal(stream->signal)) + return false; + + /* If not PWRSEQ0 can't enter idle optimizations */ + if (link && link->link_index != 0) + return false;

- if (!stream->dpms_off && !dc_is_embedded_signal(stream->signal)) + /* Check for panel power features required for idle optimizations. */ + if (!is_psr && !is_replay) return false; + + num_active_edp += 1; } + + /* If more than one active eDP then disallow. */ + if (num_active_edp > 1) + return false; }

// TODO: review other cases when idle optimization is allowed