The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 5922deae69beabae98644f3cd902df45da932297 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024081233-mumbling-hangout-5990@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^..

Possible dependencies:

5922deae69be ("drm/amd/display: Fix idle optimization checks for multi-display and dual eDP") ac9c748362fd ("drm/amd/display: Allow IPS2 during Replay") 16927047b396 ("drm/amd/display: Disable IPS by default") 198891fd2902 ("drm/amd/display: Create one virtual connector in DC") 0c9ae5cfefb0 ("Revert "drm/amd/display: Create one virtual connector in DC"") 7d3dc50e241d ("Revert "drm/amd/display: Disable virtual links"") 3dcb66171583 ("Revert "drm/amd/display: Initialize writeback connector"") c66705c5a87e ("Revert "drm/amd/display: Create amdgpu_dm_wb_connector"") b22c336268e4 ("drm/amd/display: Disable virtual links") c0af8c744e7e ("drm/amd/display: Make driver backwards-compatible with non-IPS PMFW") a5f9523c9ca3 ("drm/amd/display: Create amdgpu_dm_wb_connector") a2830b9e852f ("drm/amd/display: Initialize writeback connector") 554340133e4f ("drm/amd/display: Create one virtual connector in DC") 1b097bcd224e ("drm/amd/display: Skip entire amdgpu_dm build if !CONFIG_DRM_AMD_DC") 1288d7020809 ("drm/amd/display: Improve x86 and dmub ips handshake") c0f8b83188c7 ("drm/amd/display: disable IPS") 93a66cef607c ("drm/amd/display: Add IPS control flag") dc01c4b79bfe ("drm/amd/display: Update driver and IPS interop") 77ad5f6febdc ("drm/amd/display: Add new logs for AutoDPMTest") 0fa45b6aeae4 ("drm/amd/display: Add DCN35 Resource")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 5922deae69beabae98644f3cd902df45da932297 Mon Sep 17 00:00:00 2001 From: Nicholas Kazlauskas nicholas.kazlauskas@amd.com Date: Thu, 25 Apr 2024 11:26:59 -0400 Subject: [PATCH] drm/amd/display: Fix idle optimization checks for multi-display and dual eDP

[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 Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com

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;

- if (!stream->dpms_off && !dc_is_embedded_signal(stream->signal)) + /* 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; + + /* 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