diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2021-drm-amd-display-fix-calculation-of-total_data_read_b.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2021-drm-amd-display-fix-calculation-of-total_data_read_b.patch | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2021-drm-amd-display-fix-calculation-of-total_data_read_b.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2021-drm-amd-display-fix-calculation-of-total_data_read_b.patch new file mode 100644 index 00000000..b11d2df1 --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/2021-drm-amd-display-fix-calculation-of-total_data_read_b.patch @@ -0,0 +1,85 @@ +From 41c5c2d67d52d3cd57b0ca58a2ce01eaa5fe85b0 Mon Sep 17 00:00:00 2001 +From: Su Sung Chung <Su.Chung@amd.com> +Date: Wed, 1 May 2019 16:54:56 -0400 +Subject: [PATCH 2021/2940] drm/amd/display: fix calculation of + total_data_read_bandwidth + +[why] +by adding fast_validate flag, we are skipping some portion of +dcn_validate_bandwidth code that is not necessary for mode validation. +However we have a bug where it does not calculate +v->total_data_read_bandwidth, which is one of the factors determines the +result of the validation, and therefore report false positive during +mode validation. + +[how] +add calculation of v->total_data_read_bandwidth outside of the region +that is guarded by fast_validate flag + +Signed-off-by: Su Sung Chung <Su.Chung@amd.com> +Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com> +Acked-by: Leo Li <sunpeng.li@amd.com> +--- + .../gpu/drm/amd/display/dc/calcs/dcn_calcs.c | 39 ++++++++++++++++++- + 1 file changed, 38 insertions(+), 1 deletion(-) + +diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c +index d53306de2e16..0a336c80c7bb 100644 +--- a/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c ++++ b/drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c +@@ -711,7 +711,7 @@ bool dcn_validate_bandwidth( + + const struct resource_pool *pool = dc->res_pool; + struct dcn_bw_internal_vars *v = &context->dcn_bw_vars; +- int i, input_idx; ++ int i, input_idx, k; + int vesa_sync_start, asic_blank_end, asic_blank_start; + bool bw_limit_pass; + float bw_limit; +@@ -1022,6 +1022,43 @@ bool dcn_validate_bandwidth( + mode_support_and_system_configuration(v); + } + ++ display_pipe_configuration(v); ++ ++ for (k = 0; k <= v->number_of_active_planes - 1; k++) { ++ if (v->source_scan[k] == dcn_bw_hor) ++ v->swath_width_y[k] = v->viewport_width[k] / v->dpp_per_plane[k]; ++ else ++ v->swath_width_y[k] = v->viewport_height[k] / v->dpp_per_plane[k]; ++ } ++ for (k = 0; k <= v->number_of_active_planes - 1; k++) { ++ if (v->source_pixel_format[k] == dcn_bw_rgb_sub_64) { ++ v->byte_per_pixel_dety[k] = 8.0; ++ v->byte_per_pixel_detc[k] = 0.0; ++ } else if (v->source_pixel_format[k] == dcn_bw_rgb_sub_32) { ++ v->byte_per_pixel_dety[k] = 4.0; ++ v->byte_per_pixel_detc[k] = 0.0; ++ } else if (v->source_pixel_format[k] == dcn_bw_rgb_sub_16) { ++ v->byte_per_pixel_dety[k] = 2.0; ++ v->byte_per_pixel_detc[k] = 0.0; ++ } else if (v->source_pixel_format[k] == dcn_bw_yuv420_sub_8) { ++ v->byte_per_pixel_dety[k] = 1.0; ++ v->byte_per_pixel_detc[k] = 2.0; ++ } else { ++ v->byte_per_pixel_dety[k] = 4.0f / 3.0f; ++ v->byte_per_pixel_detc[k] = 8.0f / 3.0f; ++ } ++ } ++ ++ v->total_data_read_bandwidth = 0.0; ++ for (k = 0; k <= v->number_of_active_planes - 1; k++) { ++ v->read_bandwidth_plane_luma[k] = v->swath_width_y[k] * v->dpp_per_plane[k] * ++ dcn_bw_ceil2(v->byte_per_pixel_dety[k], 1.0) / (v->htotal[k] / v->pixel_clock[k]) * v->v_ratio[k]; ++ v->read_bandwidth_plane_chroma[k] = v->swath_width_y[k] / 2.0 * v->dpp_per_plane[k] * ++ dcn_bw_ceil2(v->byte_per_pixel_detc[k], 2.0) / (v->htotal[k] / v->pixel_clock[k]) * v->v_ratio[k] / 2.0; ++ v->total_data_read_bandwidth = v->total_data_read_bandwidth + ++ v->read_bandwidth_plane_luma[k] + v->read_bandwidth_plane_chroma[k]; ++ } ++ + BW_VAL_TRACE_END_VOLTAGE_LEVEL(); + + if (v->voltage_level != number_of_states_plus_one && !fast_validate) { +-- +2.17.1 + |