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| author | Dillon Varone <Dillon.Varone@amd.com> | 2026-08-12 15:36:31 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-09-02 15:04:43 -0400 |
| commit | 61ba35abd86b25aa835b7e382bba49856b410ced (patch) | |
| tree | 1d43773554b79d174aab0cfb3c34474003480fa2 | |
| parent | 86cc88af18cc4205f479d0e66fffe79160ff0d01 (diff) | |
| download | linux-next-61ba35abd86b25aa835b7e382bba49856b410ced.tar.gz linux-next-61ba35abd86b25aa835b7e382bba49856b410ced.zip | |
drm/amd/display: Re-enable multi-dwb support
[WHY&HOW]
DCN5+ supports multi-dwb per stream.
Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Dillon Varone <Dillon.Varone@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
3 files changed, 2 insertions, 11 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn5_calcs_dchub.c b/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn5_calcs_dchub.c index bd2494c976ac..ab778fac34b2 100644 --- a/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn5_calcs_dchub.c +++ b/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn5_calcs_dchub.c @@ -4225,9 +4225,9 @@ static double dcn5_calculate_writeback_latency_hiding_us( unsigned int dwb_index) { double byte_per_pixel_luma_in_buffer = 1.0; - double buffer_for_luma_bytes = (double)writeback_buffer_size_bytes * 1024.0; + double buffer_for_luma_bytes = (double)writeback_buffer_size_bytes; double line_time_us = (double)display_cfg->stream_descriptors[stream_index].timing.h_total / - (double)display_cfg->stream_descriptors[stream_index].timing.pixel_clock_khz / 1000.0; + ((double)display_cfg->stream_descriptors[stream_index].timing.pixel_clock_khz / 1000.0); if (display_cfg->stream_descriptors[stream_index].writeback.writeback_stream[dwb_index].pixel_format == dml2_444_64) { byte_per_pixel_luma_in_buffer = 8.0; diff --git a/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn5_funcs_mode_support.c b/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn5_funcs_mode_support.c index 2e86a134e074..fde2e0ad2529 100644 --- a/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn5_funcs_mode_support.c +++ b/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn5_funcs_mode_support.c @@ -992,11 +992,6 @@ static bool dcn5_ms_check_writeback_count_support( for (stream_idx = 0; stream_idx < display_cfg->num_streams; stream_idx++) { totalNumberOfActiveWriteback += display_cfg->stream_descriptors[stream_idx].writeback.active_writebacks_per_stream; - - /* >1 writeback per stream is currently not supported */ - if (display_cfg->stream_descriptors[stream_idx].writeback.active_writebacks_per_stream > 1) { - writeback_per_stream_supported = false; - } } return writeback_per_stream_supported && diff --git a/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn6_funcs_mode_support.c b/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn6_funcs_mode_support.c index ca3b8b82ec04..5de84d6c73c0 100644 --- a/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn6_funcs_mode_support.c +++ b/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn6_funcs_mode_support.c @@ -1292,10 +1292,6 @@ static bool dcn6_ms_check_writeback_count_support( totalNumberOfActiveWriteback += display_cfg->stream_descriptors[display_cfg->plane_descriptors[k].stream_index].writeback.active_writebacks_per_stream; - - /* >1 writeback per stream is currently not supported */ - if (display_cfg->stream_descriptors[display_cfg->plane_descriptors[k].stream_index].writeback.active_writebacks_per_stream > 1) - writeback_per_stream_supported = false; } outputs->support.EnoughWritebackUnits = writeback_per_stream_supported && totalNumberOfActiveWriteback <= ip->max_num_wb; |