This is a note to let you know that I've just added the patch titled
drm/amd/display: fix unbounded requesting for high pixel rate modes on dcn315
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-fix-unbounded-requesting-for-high-pi.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 8afb1be5e8773495b47113618466983efeee3b5e
Author: Dmytro Laktyushkin <Dmytro.Laktyushkin@xxxxxxx>
Date: Tue Nov 1 17:09:11 2022 -0400
drm/amd/display: fix unbounded requesting for high pixel rate modes on dcn315
[ Upstream commit 655435df0936ce2fda0d5ced7e50101179a3acfd ]
Unbounded requesting is getting configured for odm mode calculations which
is incorrect. This change checks whether mode requires odm ahead of time.
Reviewed-by: Jun Lei <Jun.Lei@xxxxxxx>
Acked-by: Tom Chung <chiahsuan.chung@xxxxxxx>
Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Stable-dep-of: 49f26218c344 ("drm/amd/display: fix dcn315 single stream crb allocation")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c b/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c
index 31cbc5762eab3..19f2025cb7907 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c
@@ -1707,7 +1707,9 @@ static int dcn315_populate_dml_pipes_from_context(
dc->config.enable_4to1MPC = true;
context->bw_ctx.dml.ip.det_buffer_size_kbytes =
(max_usable_det / DCN3_15_CRB_SEGMENT_SIZE_KB / 4) * DCN3_15_CRB_SEGMENT_SIZE_KB;
- } else if (!is_dual_plane(pipe->plane_state->format) && pipe->plane_state->src_rect.width <= 5120) {
+ } else if (!is_dual_plane(pipe->plane_state->format)
+ && pipe->plane_state->src_rect.width <= 5120
+ && pipe->stream->timing.pix_clk_100hz < dcn_get_max_non_odm_pix_rate_100hz(&dc->dml.soc)) {
/* Limit to 5k max to avoid forced pipe split when there is not enough detile for swath */
context->bw_ctx.dml.ip.det_buffer_size_kbytes = 192;
pipes[0].pipe.src.unbounded_req_mode = true;
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn31/dcn31_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn31/dcn31_fpu.c
index aa1c2917a4a1d..e48923f314b36 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn31/dcn31_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn31/dcn31_fpu.c
@@ -807,3 +807,8 @@ void dcn316_update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw_param
else
dml_init_instance(&dc->dml, &dcn3_16_soc, &dcn3_16_ip, DML_PROJECT_DCN31_FPGA);
}
+
+int dcn_get_max_non_odm_pix_rate_100hz(struct _vcs_dpi_soc_bounding_box_st *soc)
+{
+ return soc->clock_limits[0].dispclk_mhz * 10000.0 / (1.0 + soc->dcn_downspread_percent / 100.0);
+}
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn31/dcn31_fpu.h b/drivers/gpu/drm/amd/display/dc/dml/dcn31/dcn31_fpu.h
index fd58b2561ec9e..ab8c48b8b7e05 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn31/dcn31_fpu.h
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn31/dcn31_fpu.h
@@ -46,5 +46,6 @@ void dcn31_calculate_wm_and_dlg_fp(
void dcn31_update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw_params);
void dcn315_update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw_params);
void dcn316_update_bw_bounding_box(struct dc *dc, struct clk_bw_params *bw_params);
+int dcn_get_max_non_odm_pix_rate_100hz(struct _vcs_dpi_soc_bounding_box_st *soc);
#endif /* __DCN31_FPU_H__*/
