From 1f997af90102d99e14e59c72122ffa3a53752063 Mon Sep 17 00:00:00 2001 From: Alvin Lee Date: Wed, 9 Nov 2022 09:27:45 -0500 Subject: [PATCH] drm/amd/display: Limit HW cursor size of >= 4k [Description] - For SubVP, we cannot support HW cursor if it's greater than 64 x 64 x 4 bytes in size - However, on certain config changes (i.e. pixel format) we can exit SubVP (then change to HW cursor) then re-enter SubVP without changing back to SW cursor because there is no SetCursorAttributes call - To workaround this issue, limit the HW cursor size to be less than 64 x 64 x 4 bytes whenever the stream is >= 4K - Also ensure this W/A only affects DCN that supports SubVP Reviewed-by: Jun Lei Acked-by: Brian Chang Signed-off-by: Alvin Lee Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc_stream.c | 16 ++++++++++++++-- .../drm/amd/display/dc/dcn32/dcn32_resource.c | 2 +- .../drm/amd/display/dc/dcn321/dcn321_resource.c | 2 +- 3 files changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c index 38d71b5c1f2d..20e534f73513 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_stream.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_stream.c @@ -332,9 +332,21 @@ bool dc_stream_set_cursor_attributes( dc = stream->ctx->dc; - if (dc->debug.allow_sw_cursor_fallback && attributes->height * attributes->width * 4 > 16384) - if (stream->mall_stream_config.type == SUBVP_MAIN) + /* SubVP is not compatible with HW cursor larger than 64 x 64 x 4. + * Therefore, if cursor is greater than 64 x 64 x 4, fallback to SW cursor in the following case: + * 1. For single display cases, if resolution is >= 5K and refresh rate < 120hz + * 2. For multi display cases, if resolution is >= 4K and refresh rate < 120hz + * + * [< 120hz is a requirement for SubVP configs] + */ + if (dc->debug.allow_sw_cursor_fallback && attributes->height * attributes->width * 4 > 16384) { + if (dc->current_state->stream_count == 1 && stream->timing.v_addressable >= 2880 && + ((stream->timing.pix_clk_100hz * 100) / stream->timing.v_total / stream->timing.h_total) < 120) return false; + else if (dc->current_state->stream_count > 1 && stream->timing.v_addressable >= 2160 && + ((stream->timing.pix_clk_100hz * 100) / stream->timing.v_total / stream->timing.h_total) < 120) + return false; + } stream->cursor_attributes = *attributes; diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c index 0c13fe0239d8..c40dccef6843 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c @@ -723,7 +723,7 @@ static const struct dc_debug_options debug_defaults_drv = { /* Must match enable_single_display_2to1_odm_policy to support dynamic ODM transitions*/ .enable_double_buffered_dsc_pg_support = true, .enable_dp_dig_pixel_rate_div_policy = 1, - .allow_sw_cursor_fallback = false, + .allow_sw_cursor_fallback = false, // Linux can't do SW cursor "fallback" .alloc_extra_way_for_cursor = true, .min_prefetch_in_strobe_ns = 60000, // 60us }; diff --git a/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c b/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c index d17d0f22be1f..06f144189e9d 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn321/dcn321_resource.c @@ -721,7 +721,7 @@ static const struct dc_debug_options debug_defaults_drv = { /*must match enable_single_display_2to1_odm_policy to support dynamic ODM transitions*/ .enable_double_buffered_dsc_pg_support = true, .enable_dp_dig_pixel_rate_div_policy = 1, - .allow_sw_cursor_fallback = false, + .allow_sw_cursor_fallback = false, // Linux can't do SW cursor "fallback" .alloc_extra_way_for_cursor = true, .min_prefetch_in_strobe_ns = 60000, // 60us }; -- 2.34.1