[PATCH 47/49] drm/amd/display: plumb PMO per-plane pstate methods into mode_support

[Fangzhi Zuo <jerry.zuo@amd.com>]

From: Alexander Chechik <alexander.chechik@amd.com>

[Why]
mode_support reads mode_lib.ms.uclk_pstate_switch_modes to enforce the
vactive pstate margin, but nothing populates it: the memset clears it and
the PMO selection is never passed in. The check always sees na and never
runs, so a plane with negative vactive margin can still pass and blank the
display.

[How]
Add a const per-plane pstate-method pointer to mode_support_ex, point it at
stage3.pstate_switch_modes when stage 3 has run (NULL otherwise), and copy
it into mode_lib.ms after the memset. Scope the support-required check to
the vactive methods it governs (vactive, fw_vactive_drr) so SVP, DRR and
vblank planes are not rejected by the vactive support flag.

Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Signed-off-by: Alexander Chechik <alexander.chechik@amd.com>
Signed-off-by: Matthew Stewart <matthew.stewart2@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
---
 .../dml2_0/dml21/src/dml2_core/dml2_core_dcn4.c | 10 +++-------
 .../dml21/src/dml2_core/dml2_core_dcn4_calcs.c  | 17 +++++++++++++----
 .../src/dml2_core/dml2_core_shared_types.h      |  1 +
 3 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn4.c b/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn4.c
index 45f1bf5e14bf..6ea36aedcf20 100644
--- a/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn4.c
+++ b/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn4.c
@@ -554,13 +554,9 @@ bool core_dcn4_mode_support(struct dml2_core_mode_support_in_out *in_out)
 	l->mode_support_ex_params.min_clk_index = in_out->min_clk_index;
 	l->mode_support_ex_params.out_evaluation_info = &in_out->mode_support_result.cfg_support_info.clean_me_up.support_info;
 
-	for (i = 0; i < l->svp_expanded_display_cfg.num_planes; i++) {
-		if (i < in_out->display_cfg->display_config.num_planes)
-			core->clean_me_up.mode_lib.ms.uclk_pstate_switch_modes[i] =
-				in_out->display_cfg->stage3.pstate_switch_modes[i];
-		else
-			core->clean_me_up.mode_lib.ms.uclk_pstate_switch_modes[i] = dml2_pstate_method_na;
-	}
+	l->mode_support_ex_params.uclk_pstate_switch_modes =
+		in_out->display_cfg->stage3.performed ?
+			in_out->display_cfg->stage3.pstate_switch_modes : NULL;
 
 	result = dml2_core_calcs_mode_support_ex(&l->mode_support_ex_params);
 
diff --git a/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn4_calcs.c b/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn4_calcs.c
index 4ca6a4521f11..09452f3e49db 100644
--- a/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn4_calcs.c
+++ b/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_dcn4_calcs.c
@@ -8057,6 +8057,16 @@ static bool dml_core_mode_support(struct dml2_core_calcs_mode_support_ex *in_out
 	memset(&mode_lib->ms, 0, sizeof(struct dml2_core_internal_mode_support));
 
 	mode_lib->ms.num_active_planes = display_cfg->num_planes;
+
+	for (k = 0; k < mode_lib->ms.num_active_planes; k++) {
+		if (in_out_params->uclk_pstate_switch_modes &&
+				!dml_is_phantom_pipe(&display_cfg->plane_descriptors[k]))
+			mode_lib->ms.uclk_pstate_switch_modes[k] =
+				in_out_params->uclk_pstate_switch_modes[k];
+		else
+			mode_lib->ms.uclk_pstate_switch_modes[k] = dml2_pstate_method_na;
+	}
+
 	get_stream_output_bpp(s->OutputBpp, display_cfg);
 
 	mode_lib->ms.state_idx = in_out_params->min_clk_index;
@@ -9644,14 +9654,13 @@ static bool dml_core_mode_support(struct dml2_core_calcs_mode_support_ex *in_out
 
 	if (!display_cfg->overrides.all_streams_blanked) {
 		for (k = 0; k < mode_lib->ms.num_active_planes; k++) {
-			if (mode_lib->ms.uclk_pstate_switch_modes[k] == dml2_pstate_method_na)
+			if (mode_lib->ms.uclk_pstate_switch_modes[k] != dml2_pstate_method_vactive &&
+					mode_lib->ms.uclk_pstate_switch_modes[k] != dml2_pstate_method_fw_vactive_drr)
 				continue;
 
 			mode_lib->ms.support.global_dram_clock_change_support_required = true;
 
-			if ((mode_lib->ms.uclk_pstate_switch_modes[k] == dml2_pstate_method_vactive ||
-					mode_lib->ms.uclk_pstate_switch_modes[k] == dml2_pstate_method_fw_vactive_drr) &&
-					mode_lib->ms.VActiveLatencyHidingMargin[k] < 0)
+			if (mode_lib->ms.VActiveLatencyHidingMargin[k] < 0)
 				mode_lib->ms.support.global_dram_clock_change_supported = false;
 		}
 	}
diff --git a/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_shared_types.h b/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_shared_types.h
index 131cec64aa48..b8af72392176 100644
--- a/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_shared_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/src/dml2_core/dml2_core_shared_types.h
@@ -2333,6 +2333,7 @@ struct dml2_core_calcs_mode_support_ex {
 	int min_clk_index;
 	//unsigned int in_state_index;
 	struct dml2_core_internal_mode_support_info *out_evaluation_info;
+	const enum dml2_pstate_method *uclk_pstate_switch_modes;
 };
 
 struct core_display_cfg_support_info;
-- 
2.53.0