This is a note to let you know that I've just added the patch titled
drm/amd/display: Remove stutter only configurations
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-remove-stutter-only-configurations.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 b22d45789d7f172982da7f886fde36675510c7bb
Author: Nasir Osman <nasir.osman@xxxxxxx>
Date: Wed Feb 1 14:16:12 2023 -0500
drm/amd/display: Remove stutter only configurations
[ Upstream commit 71c4ca2d3b079d0ba4d9b3033641fea906cebfb6 ]
[why]
Newer ASICs such as DCN314 needs to allow for both self refresh and mem
clk switching rather than just self refresh only. Otherwise, we can see
some p-state hangs on ASICs that do support mem clk switching.
[how]
Added an allow_self_refresh_only flag for dcn30_internal_validate_bw
and created a validate_bw method for DCN314 with the allow_self_refresh_only
flag set to false (to support mem clk switching).
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@xxxxxxx>
Acked-by: Qingqing Zhuo <qingqing.zhuo@xxxxxxx>
Signed-off-by: Nasir Osman <nasir.osman@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Stable-dep-of: 1e994cc0956b ("drm/amd/display: limit timing for single dimm memory")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
index 020f512e9690e..e958f838c8041 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
@@ -1641,7 +1641,8 @@ noinline bool dcn30_internal_validate_bw(
display_e2e_pipe_params_st *pipes,
int *pipe_cnt_out,
int *vlevel_out,
- bool fast_validate)
+ bool fast_validate,
+ bool allow_self_refresh_only)
{
bool out = false;
bool repopulate_pipes = false;
@@ -1668,7 +1669,7 @@ noinline bool dcn30_internal_validate_bw(
dml_log_pipe_params(&context->bw_ctx.dml, pipes, pipe_cnt);
- if (!fast_validate) {
+ if (!fast_validate || !allow_self_refresh_only) {
/*
* DML favors voltage over p-state, but we're more interested in
* supporting p-state over voltage. We can't support p-state in
@@ -1681,11 +1682,12 @@ noinline bool dcn30_internal_validate_bw(
if (vlevel < context->bw_ctx.dml.soc.num_states)
vlevel = dcn20_validate_apply_pipe_split_flags(dc, context, vlevel, split, merge);
}
- if (fast_validate || vlevel == context->bw_ctx.dml.soc.num_states ||
- vba->DRAMClockChangeSupport[vlevel][vba->maxMpcComb] == dm_dram_clock_change_unsupported) {
+ if (allow_self_refresh_only &&
+ (fast_validate || vlevel == context->bw_ctx.dml.soc.num_states ||
+ vba->DRAMClockChangeSupport[vlevel][vba->maxMpcComb] == dm_dram_clock_change_unsupported)) {
/*
- * If mode is unsupported or there's still no p-state support then
- * fall back to favoring voltage.
+ * If mode is unsupported or there's still no p-state support
+ * then fall back to favoring voltage.
*
* We don't actually support prefetch mode 2, so require that we
* at least support prefetch mode 1.
@@ -2056,7 +2058,7 @@ bool dcn30_validate_bandwidth(struct dc *dc,
BW_VAL_TRACE_COUNT();
DC_FP_START();
- out = dcn30_internal_validate_bw(dc, context, pipes, &pipe_cnt, &vlevel, fast_validate);
+ out = dcn30_internal_validate_bw(dc, context, pipes, &pipe_cnt, &vlevel, fast_validate, true);
DC_FP_END();
if (pipe_cnt == 0)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.h b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.h
index 7d063c7d6a4bf..8e6b8b7368fdb 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.h
@@ -64,7 +64,8 @@ bool dcn30_internal_validate_bw(
display_e2e_pipe_params_st *pipes,
int *pipe_cnt_out,
int *vlevel_out,
- bool fast_validate);
+ bool fast_validate,
+ bool allow_self_refresh_only);
void dcn30_calculate_wm_and_dlg(
struct dc *dc, struct dc_state *context,
display_e2e_pipe_params_st *pipes,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
index fddc21a5a04c4..d825f11b4feaa 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_resource.c
@@ -1770,7 +1770,7 @@ bool dcn31_validate_bandwidth(struct dc *dc,
BW_VAL_TRACE_COUNT();
DC_FP_START();
- out = dcn30_internal_validate_bw(dc, context, pipes, &pipe_cnt, &vlevel, fast_validate);
+ out = dcn30_internal_validate_bw(dc, context, pipes, &pipe_cnt, &vlevel, fast_validate, true);
DC_FP_END();
// Disable fast_validate to set min dcfclk in alculate_wm_and_dlg
diff --git a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
index 9918bccd6defb..2f9c6d64b98bc 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.c
@@ -1689,6 +1689,61 @@ static void dcn314_get_panel_config_defaults(struct dc_panel_config *panel_confi
*panel_config = panel_config_defaults;
}
+bool dcn314_validate_bandwidth(struct dc *dc,
+ struct dc_state *context,
+ bool fast_validate)
+{
+ bool out = false;
+
+ BW_VAL_TRACE_SETUP();
+
+ int vlevel = 0;
+ int pipe_cnt = 0;
+ display_e2e_pipe_params_st *pipes = kzalloc(dc->res_pool->pipe_count * sizeof(display_e2e_pipe_params_st), GFP_KERNEL);
+ DC_LOGGER_INIT(dc->ctx->logger);
+
+ BW_VAL_TRACE_COUNT();
+
+ DC_FP_START();
+ // do not support self refresh only
+ out = dcn30_internal_validate_bw(dc, context, pipes, &pipe_cnt, &vlevel, fast_validate, false);
+ DC_FP_END();
+
+ // Disable fast_validate to set min dcfclk in calculate_wm_and_dlg
+ if (pipe_cnt == 0)
+ fast_validate = false;
+
+ if (!out)
+ goto validate_fail;
+
+ BW_VAL_TRACE_END_VOLTAGE_LEVEL();
+
+ if (fast_validate) {
+ BW_VAL_TRACE_SKIP(fast);
+ goto validate_out;
+ }
+
+ dc->res_pool->funcs->calculate_wm_and_dlg(dc, context, pipes, pipe_cnt, vlevel);
+
+ BW_VAL_TRACE_END_WATERMARKS();
+
+ goto validate_out;
+
+validate_fail:
+ DC_LOG_WARNING("Mode Validation Warning: %s failed validation.\n",
+ dml_get_status_message(context->bw_ctx.dml.vba.ValidationStatus[context->bw_ctx.dml.vba.soc.num_states]));
+
+ BW_VAL_TRACE_SKIP(fail);
+ out = false;
+
+validate_out:
+ kfree(pipes);
+
+ BW_VAL_TRACE_FINISH();
+
+ return out;
+}
+
static struct resource_funcs dcn314_res_pool_funcs = {
.destroy = dcn314_destroy_resource_pool,
.link_enc_create = dcn31_link_encoder_create,
@@ -1696,7 +1751,7 @@ static struct resource_funcs dcn314_res_pool_funcs = {
.link_encs_assign = link_enc_cfg_link_encs_assign,
.link_enc_unassign = link_enc_cfg_link_enc_unassign,
.panel_cntl_create = dcn31_panel_cntl_create,
- .validate_bandwidth = dcn31_validate_bandwidth,
+ .validate_bandwidth = dcn314_validate_bandwidth,
.calculate_wm_and_dlg = dcn31_calculate_wm_and_dlg,
.update_soc_for_wm_a = dcn31_update_soc_for_wm_a,
.populate_dml_pipes = dcn314_populate_dml_pipes_from_context,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.h b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.h
index 0dd3153aa5c17..49ffe71018dfb 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_resource.h
@@ -39,6 +39,10 @@ struct dcn314_resource_pool {
struct resource_pool base;
};
+bool dcn314_validate_bandwidth(struct dc *dc,
+ struct dc_state *context,
+ bool fast_validate);
+
struct resource_pool *dcn314_create_resource_pool(
const struct dc_init_data *init_data,
struct dc *dc);
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn30/dcn30_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn30/dcn30_fpu.c
index e1e92daba6686..990dbd736e2ce 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn30/dcn30_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn30/dcn30_fpu.c
@@ -636,7 +636,7 @@ int dcn30_find_dummy_latency_index_for_fw_based_mclk_switch(struct dc *dc,
while (dummy_latency_index < max_latency_table_entries) {
context->bw_ctx.dml.soc.dram_clock_change_latency_us =
dc->clk_mgr->bw_params->dummy_pstate_table[dummy_latency_index].dummy_pstate_latency_us;
- dcn30_internal_validate_bw(dc, context, pipes, &pipe_cnt, &vlevel, false);
+ dcn30_internal_validate_bw(dc, context, pipes, &pipe_cnt, &vlevel, false, true);
if (context->bw_ctx.dml.soc.allow_dram_self_refresh_or_dram_clock_change_in_vblank ==
dm_allow_self_refresh_and_mclk_switch)
