From c02b04633c4f4654331c53966cb937df1c73a9bb Mon Sep 17 00:00:00 2001
From: Daniel Miess <daniel.miess@amd.com>
Date: Thu, 11 May 2023 09:12:09 -0400
Subject: [PATCH] drm/amd/display: Revert vblank change that causes null pointer crash
Git-commit: c02b04633c4f4654331c53966cb937df1c73a9bb
Patch-mainline: v6.5-rc1
References: git-fixes
Revert commit 1a4bcdbea431 ("drm/amd/display: Fix possible underflow for displays with large vblank")
Because it cause some regression
Fixes: 1a4bcdbea431 ("drm/amd/display: Fix possible underflow for displays with large vblank")
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Daniel Miess <daniel.miess@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
.../amd/display/dc/dml/dcn314/dcn314_fpu.c | 19 ++++++++++++-------
1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c
index 554152371eb5..1d00eb9e73c6 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn314/dcn314_fpu.c
@@ -33,7 +33,7 @@
#include "dml/display_mode_vba.h"
struct _vcs_dpi_ip_params_st dcn3_14_ip = {
- .VBlankNomDefaultUS = 800,
+ .VBlankNomDefaultUS = 668,
.gpuvm_enable = 1,
.gpuvm_max_page_table_levels = 1,
.hostvm_enable = 1,
@@ -286,7 +286,7 @@ int dcn314_populate_dml_pipes_from_context_fpu(struct dc *dc, struct dc_state *c
struct resource_context *res_ctx = &context->res_ctx;
struct pipe_ctx *pipe;
bool upscaled = false;
- const unsigned int max_allowed_vblank_nom = 1023;
+ bool isFreesyncVideo = false;
dc_assert_fp_enabled();
@@ -300,11 +300,16 @@ int dcn314_populate_dml_pipes_from_context_fpu(struct dc *dc, struct dc_state *c
pipe = &res_ctx->pipe_ctx[i];
timing = &pipe->stream->timing;
- pipes[pipe_cnt].pipe.dest.vtotal = pipe->stream->adjust.v_total_min;
- pipes[pipe_cnt].pipe.dest.vblank_nom = timing->v_total - pipes[pipe_cnt].pipe.dest.vactive;
- pipes[pipe_cnt].pipe.dest.vblank_nom = min(pipes[pipe_cnt].pipe.dest.vblank_nom, dcn3_14_ip.VBlankNomDefaultUS);
- pipes[pipe_cnt].pipe.dest.vblank_nom = max(pipes[pipe_cnt].pipe.dest.vblank_nom, timing->v_sync_width);
- pipes[pipe_cnt].pipe.dest.vblank_nom = min(pipes[pipe_cnt].pipe.dest.vblank_nom, max_allowed_vblank_nom);
+ isFreesyncVideo = pipe->stream->adjust.v_total_max == pipe->stream->adjust.v_total_min;
+ isFreesyncVideo = isFreesyncVideo && pipe->stream->adjust.v_total_min > timing->v_total;
+
+ if (!isFreesyncVideo) {
+ pipes[pipe_cnt].pipe.dest.vblank_nom =
+ dcn3_14_ip.VBlankNomDefaultUS / (timing->h_total / (timing->pix_clk_100hz / 10000.0));
+ } else {
+ pipes[pipe_cnt].pipe.dest.vtotal = pipe->stream->adjust.v_total_min;
+ pipes[pipe_cnt].pipe.dest.vblank_nom = timing->v_total - pipes[pipe_cnt].pipe.dest.vactive;
+ }
if (pipe->plane_state &&
(pipe->plane_state->src_rect.height < pipe->plane_state->dst_rect.height ||
--
2.43.0