[PATCH 13/21] drm/amd/display: Added debug option for forcing subvp num ways

[Pavle Kotarac]

From: "Lee, Alvin" <Alvin.Lee2 at amd.com>

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

Reviewed-by: Jun Lei <Jun.Lei at amd.com>
Acked-by: Pavle Kotarac <Pavle.Kotarac at amd.com>
Signed-off-by: Alvin Lee <Alvin.Lee2 at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dc.h                   |  1 +
 .../drm/amd/display/dc/dcn32/dcn32_resource_helpers.c | 11 ++++++++---
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index c48403d49f2e..e8e8e031b9d7 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 13cd1f2e50ca..7c37575d69c7 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;
 }
 
-- 
2.34.1