From: Lee, Alvin <Alvin.Lee2@amd.com>
Date: Thu, 25 Aug 2022 20:05:03 +0000 (-0400)
Subject: drm/amd/display: Added debug option for forcing subvp num ways
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5c1a431aaf52bbba8b6e2c4e9b4037a09509c0e3;p=linux.git

drm/amd/display: Added debug option for forcing subvp num ways

[Description]
Regkey option for forcing num ways for subvp for debug purposes

Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Pavle Kotarac <Pavle.Kotarac@amd.com>
Signed-off-by: Alvin Lee <Alvin.Lee2@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index c48403d49f2e7..e8e8e031b9d7d 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -831,6 +831,7 @@ struct dc_debug_options {
 	bool force_disable_subvp;
 	bool force_subvp_mclk_switch;
 	bool allow_sw_cursor_fallback;
+	unsigned int force_subvp_num_ways;
 	bool force_usr_allow;
 	/* uses value at boot and disables switch */
 	bool disable_dtb_ref_clk_switch;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c
index 1f195c5b3377d..417dfdcf95962 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c
@@ -54,13 +54,14 @@ uint32_t dcn32_helper_calculate_num_ways_for_subvp(struct dc *dc, struct dc_stat
 	uint32_t num_mblks = 0;
 	uint32_t cache_lines_per_plane = 0;
 	uint32_t i = 0, j = 0;
-	uint32_t mblk_width = 0;
-	uint32_t mblk_height = 0;
+	uint16_t mblk_width = 0;
+	uint16_t mblk_height = 0;
 	uint32_t full_vp_width_blk_aligned = 0;
 	uint32_t full_vp_height_blk_aligned = 0;
 	uint32_t mall_alloc_width_blk_aligned = 0;
 	uint32_t mall_alloc_height_blk_aligned = 0;
-	uint32_t full_vp_height = 0;
+	uint16_t full_vp_height = 0;
+	bool subvp_in_use = false;
 
 	for (i = 0; i < dc->res_pool->pipe_count; i++) {
 		struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
@@ -70,6 +71,7 @@ uint32_t dcn32_helper_calculate_num_ways_for_subvp(struct dc *dc, struct dc_stat
 				pipe->stream->mall_stream_config.type == SUBVP_PHANTOM) {
 			struct pipe_ctx *main_pipe = NULL;
 
+			subvp_in_use = true;
 			/* Get full viewport height from main pipe (required for MBLK calculation) */
 			for (j = 0; j < dc->res_pool->pipe_count; j++) {
 				main_pipe = &context->res_ctx.pipe_ctx[j];
@@ -129,6 +131,9 @@ uint32_t dcn32_helper_calculate_num_ways_for_subvp(struct dc *dc, struct dc_stat
 	if (cache_lines_used % lines_per_way > 0)
 		num_ways++;
 
+	if (subvp_in_use && dc->debug.force_subvp_num_ways > 0)
+		num_ways = dc->debug.force_subvp_num_ways;
+
 	return num_ways;
 }