From: Alvin Lee Alvin.Lee2@amd.com

[Description] - Enabling SubVP on high refresh rate displays had a side effect of also enabling on high bandwidth displays such as 8K60 - However, these are not validated and should be blocked for the time being - Block SubVP on displays that have pix rate > 1800Mhz (includes 8K60 displays)

Reviewed-by: Jun Lei Jun.Lei@amd.com Reviewed-by: Nevenko Stupar Nevenko.Stupar@amd.com Cc: Mario Limonciello mario.limonciello@amd.com Cc: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Acked-by: Alex Hung alex.hung@amd.com Signed-off-by: Alvin Lee Alvin.Lee2@amd.com --- drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.h | 1 + drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c | 1 + 2 files changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.h b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.h index 04be01ae1ecf..42ccfd13a37c 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.h +++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.h @@ -41,6 +41,7 @@ #define DCN3_2_DCFCLK_DS_INIT_KHZ 10000 // Choose 10Mhz for init DCFCLK DS freq #define DCN3_2_MIN_ACTIVE_SWITCH_MARGIN_FPO_US 100 // Only allow FPO + Vactive if active margin >= 100 #define SUBVP_HIGH_REFRESH_LIST_LEN 3 +#define DCN3_2_MAX_SUBVP_PIXEL_RATE_MHZ 1800

#define TO_DCN32_RES_POOL(pool)\ container_of(pool, struct dcn32_resource_pool, base) 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 cd28980b2b56..f7e45d935a29 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 @@ -703,6 +703,7 @@ 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)) && pipe->stream->mall_stream_config.type == SUBVP_NONE && (refresh_rate < 120 || dcn32_allow_subvp_high_refresh_rate(dc, context, pipe)) &&