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drm/amd/display: Add dc cap to restrict VSR downscaling src size 

- Adds int max_downscale_src_width in dc struct
- Checks and does not support if downscale size is more than 4k (width > 3840)

Signed-off-by: Xingyue Tao <xingyue.tao@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Xingyue Tao 2018-04-19 16:23:12 -04:00 committed by Alex Deucher
parent 7ea034ce81
commit 3f460907be
3 changed files with 13 additions and 5 deletions
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1
drivers/gpu/drm/amd/display/dc/dc.h
View File

@ -203,6 +203,7 @@ struct dc_debug {
bool clock_trace;
bool validation_trace;
bool bandwidth_calcs_trace;
int max_downscale_src_width;
/* stutter efficiency related */
bool disable_stutter;

12
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp.c
View File

@ -145,13 +145,19 @@ bool dpp_get_optimal_number_of_taps(
else
pixel_width = scl_data->viewport.width;
/* Some ASICs does not support FP16 scaling, so we reject modes require this*/
if (scl_data->viewport.width != scl_data->h_active &&
scl_data->viewport.height != scl_data->v_active &&
dpp->caps->dscl_data_proc_format == DSCL_DATA_PRCESSING_FIXED_FORMAT &&
scl_data->viewport.height != scl_data->v_active) {
/* Some ASICs does not support FP16 scaling, so we reject modes require this*/
if (dpp->caps->dscl_data_proc_format == DSCL_DATA_PRCESSING_FIXED_FORMAT &&
scl_data->format == PIXEL_FORMAT_FP16)
return false;
if (dpp->ctx->dc->debug.max_downscale_src_width != 0 &&
scl_data->viewport.width > dpp->ctx->dc->debug.max_downscale_src_width)
return false;
}
/* TODO: add lb check */
/* No support for programming ratio of 4, drop to 3.99999.. */

1
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c
View File

@ -447,6 +447,7 @@ static const struct dc_debug debug_defaults_drv = {
.performance_trace = false,
.az_endpoint_mute_only = true,
.recovery_enabled = false, /*enable this by default after testing.*/
.max_downscale_src_width = 3840,
};
static const struct dc_debug debug_defaults_diags = {