The patch below does not apply to the 4.19-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 <sta...@vger.kernel.org>.
Thanks, Sasha ------------------ original commit in Linus's tree ------------------ >From cf8c498694a443e28dc1222f3ab94677114a4724 Mon Sep 17 00:00:00 2001 From: Wenjing Liu <wenjing....@amd.com> Date: Mon, 4 Mar 2024 11:20:27 -0500 Subject: [PATCH] drm/amd/display: Revert Remove pixle rate limit for subvp This reverts commit 340383c734f8 ("drm/amd/display: Remove pixle rate limit for subvp") [why] The original commit causes a regression when subvp is applied on ODM required 8k60hz timing. The display shows black screen on boot. The issue can be recovered with hotplug. It also causes MPO to fail. We will temprarily revert this commit and investigate the root cause further. Cc: Mario Limonciello <mario.limoncie...@amd.com> Cc: Alex Deucher <alexander.deuc...@amd.com> Cc: sta...@vger.kernel.org Reviewed-by: Chaitanya Dhere <chaitanya.dh...@amd.com> Reviewed-by: Martin Leung <martin.le...@amd.com> Acked-by: Wayne Lin <wayne....@amd.com> Signed-off-by: Wenjing Liu <wenjing....@amd.com> Tested-by: Daniel Wheeler <daniel.whee...@amd.com> Signed-off-by: Alex Deucher <alexander.deuc...@amd.com> --- drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c index b49e1dc9d8ba5..a0a65e0991041 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c @@ -623,6 +623,7 @@ static bool dcn32_assign_subvp_pipe(struct dc *dc, * - Not TMZ surface */ if (pipe->plane_state && !pipe->top_pipe && !dcn32_is_center_timing(pipe) && + !(pipe->stream->timing.pix_clk_100hz / 10000 > DCN3_2_MAX_SUBVP_PIXEL_RATE_MHZ) && (!dcn32_is_psr_capable(pipe) || (context->stream_count == 1 && dc->caps.dmub_caps.subvp_psr)) && dc_state_get_pipe_subvp_type(context, pipe) == SUBVP_NONE && (refresh_rate < 120 || dcn32_allow_subvp_high_refresh_rate(dc, context, pipe)) && -- 2.43.0