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From 481b210e42288c12e4a6a5f73282345f3df79caa Mon Sep 17 00:00:00 2001
From: Xingyue Tao <xingyue.tao@amd.com>
Date: Thu, 19 Apr 2018 16:23:12 -0400
Subject: [PATCH 4464/5725] 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>
---
drivers/gpu/drm/amd/display/dc/dc.h | 1 +
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp.c | 16 +++++++++++-----
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c | 1 +
3 files changed, 13 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 28c6210..2023080 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -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;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp.c
index 20796da..2da1389 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_dpp.c
@@ -145,12 +145,18 @@ 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->format == PIXEL_FORMAT_FP16)
- return false;
+ 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 */
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c
index 16c84e9..f69f3a5 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c
@@ -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 = {
--
2.7.4
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