This is a note to let you know that I've just added the patch titled
drm/amd/display: Add missing WA and MCLK validation
to the 6.2-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-add-missing-wa-and-mclk-validation.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b4c1d6e751096a8c30aed9da2d405eaa2fee03f2
Author: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx>
Date: Tue Apr 4 14:54:05 2023 -0600
drm/amd/display: Add missing WA and MCLK validation
[ Upstream commit 822b84ecfc646da0f87fd947fa00dc3be5e45ecc ]
When the commit fff7eb56b376 ("drm/amd/display: Don't set dram clock
change requirement for SubVP") was merged, we missed some parts
associated with the MCLK switch. This commit adds all the missing parts.
Fixes: fff7eb56b376 ("drm/amd/display: Don't set dram clock change requirement for SubVP")
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@xxxxxxx>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
index 30d15a94f720d..578a715040ac3 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
@@ -992,6 +992,7 @@ void dcn32_init_hw(struct dc *dc)
if (dc->ctx->dmub_srv) {
dc_dmub_srv_query_caps_cmd(dc->ctx->dmub_srv->dmub);
dc->caps.dmub_caps.psr = dc->ctx->dmub_srv->dmub->feature_caps.psr;
+ dc->caps.dmub_caps.mclk_sw = dc->ctx->dmub_srv->dmub->feature_caps.fw_assisted_mclk_switch;
}
}
diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c
index 6187aba1362b8..41c3620546c2b 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c
@@ -2021,7 +2021,7 @@ int dcn32_populate_dml_pipes_from_context(
// In general cases we want to keep the dram clock change requirement
// (prefer configs that support MCLK switch). Only override to false
// for SubVP
- if (subvp_in_use)
+ if (context->bw_ctx.bw.dcn.clk.fw_based_mclk_switching || subvp_in_use)
context->bw_ctx.dml.soc.dram_clock_change_requirement_final = false;
else
context->bw_ctx.dml.soc.dram_clock_change_requirement_final = true;
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 4fa6363647937..fdfb19337ea6e 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
@@ -368,7 +368,9 @@ void dcn30_fpu_update_soc_for_wm_a(struct dc *dc, struct dc_state *context)
dc_assert_fp_enabled();
if (dc->clk_mgr->bw_params->wm_table.nv_entries[WM_A].valid) {
- context->bw_ctx.dml.soc.dram_clock_change_latency_us = dc->clk_mgr->bw_params->wm_table.nv_entries[WM_A].dml_input.pstate_latency_us;
+ if (!context->bw_ctx.bw.dcn.clk.fw_based_mclk_switching ||
+ context->bw_ctx.dml.soc.dram_clock_change_latency_us == 0)
+ context->bw_ctx.dml.soc.dram_clock_change_latency_us = dc->clk_mgr->bw_params->wm_table.nv_entries[WM_A].dml_input.pstate_latency_us;
context->bw_ctx.dml.soc.sr_enter_plus_exit_time_us = dc->clk_mgr->bw_params->wm_table.nv_entries[WM_A].dml_input.sr_enter_plus_exit_time_us;
context->bw_ctx.dml.soc.sr_exit_time_us = dc->clk_mgr->bw_params->wm_table.nv_entries[WM_A].dml_input.sr_exit_time_us;
}
@@ -520,6 +522,20 @@ void dcn30_fpu_calculate_wm_and_dlg(
pipe_idx++;
}
+ // WA: restrict FPO to use first non-strobe mode (NV24 BW issue)
+ if (context->bw_ctx.bw.dcn.clk.fw_based_mclk_switching &&
+ dc->dml.soc.num_chans <= 4 &&
+ context->bw_ctx.dml.vba.DRAMSpeed <= 1700 &&
+ context->bw_ctx.dml.vba.DRAMSpeed >= 1500) {
+
+ for (i = 0; i < dc->dml.soc.num_states; i++) {
+ if (dc->dml.soc.clock_limits[i].dram_speed_mts > 1700) {
+ context->bw_ctx.dml.vba.DRAMSpeed = dc->dml.soc.clock_limits[i].dram_speed_mts;
+ break;
+ }
+ }
+ }
+
dcn20_calculate_dlg_params(dc, context, pipes, pipe_cnt, vlevel);
if (!pstate_en)
