diff options
| author | Wenjing Liu <wenjing.liu@amd.com> | 2021-04-09 21:55:18 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-04-29 06:35:50 +0300 |
| commit | 642d3a2bf234578da83ed1fb6ef87dba36d31dea (patch) | |
| tree | 371a293d776df14c218c31866079385fc466ff6c /drivers/gpu/drm/amd/display/dc/dc_dsc.h | |
| parent | abf1f863e08dc23764ce617dd55e1b533e525a3f (diff) | |
| download | linux-642d3a2bf234578da83ed1fb6ef87dba36d31dea.tar.xz | |
drm/amd/display: take max dsc stream bandwidth overhead into account
[why]
As hardware team suggested that we need to add a max dsc bw overhead
into existing stream bandwidth when DSC is used.
The formula as below:
max_dsc_bw_overhead =
v_addressable * slice_count * 256 bit * pixel clock / v_total / h_total
effective stream bandwidth = pixel clock * bpp
stream bandwidth = effective stream bandwidth + dsc stream overhead
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Reviewed-by: Eric Bernstein <Eric.Bernstein@amd.com>
Acked-by: Wayne Lin <waynelin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dc_dsc.h')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_dsc.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dc_dsc.h b/drivers/gpu/drm/amd/display/dc/dc_dsc.h index c51d2d961b7a..afddb8b7d3e4 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_dsc.h +++ b/drivers/gpu/drm/amd/display/dc/dc_dsc.h @@ -78,7 +78,8 @@ bool dc_dsc_compute_config( const struct dc_crtc_timing *timing, struct dc_dsc_config *dsc_cfg); -uint32_t dc_dsc_stream_bandwidth_in_kbps(uint32_t pix_clk_100hz, uint32_t bpp_x16); +uint32_t dc_dsc_stream_bandwidth_in_kbps(const struct dc_crtc_timing *timing, + uint32_t bpp_x16, uint32_t num_slices_h); void dc_dsc_get_policy_for_timing(const struct dc_crtc_timing *timing, uint32_t max_target_bpp_limit_override_x16, @@ -88,6 +89,4 @@ void dc_dsc_policy_set_max_target_bpp_limit(uint32_t limit); void dc_dsc_policy_set_enable_dsc_when_not_needed(bool enable); -uint32_t dc_dsc_stream_bandwidth_in_kbps(uint32_t pix_clk_100hz, uint32_t bpp_x16); - #endif |