drm/amd/display: Move fpo_in_use to stream_status

[Description]
Refactor code and move fpo_in_use into stream_status to avoid
unexpected changes to previous dc_state (i.e., current_state).
Since stream pointers are shared between current and new dc_states,
updating parameters of one stream will update the other as well
which causes unexpected behaviors (i.e., checking that fpo_in_use
isn't set in previous state and set in the new state is invalid).
To avoid incorrect updates to current_state, move the fpo_in_use flag
into dc_stream_status since stream_status is owned by dc and are not
shared between different dc_states.
Reviewed-by: Samson Tam <samson.tam@amd.com>
Acked-by: Zaeem Mohamed <zaeem.mohamed@amd.com>
Signed-off-by: Alvin Lee <alvin.lee2@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dc_dmub_srv.c

@@ -427,6 +427,7 @@ bool dc_dmub_srv_p_state_delegate(struct dc *dc, bool should_manage_pstate, stru
 	int ramp_up_num_steps = 1; // TODO: Ramp is currently disabled. Reenable it.
 	uint8_t visual_confirm_enabled;
 	int pipe_idx = 0;
+	struct dc_stream_status *stream_status = NULL;
 
 	if (dc == NULL)
 		return false;
@@ -443,6 +444,7 @@ bool dc_dmub_srv_p_state_delegate(struct dc *dc, bool should_manage_pstate, stru
 		for (i = 0, pipe_idx = 0; i < dc->res_pool->pipe_count; i++) {
 			struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
 
+			stream_status = NULL;
 			if (!pipe->stream)
 				continue;
 
@@ -450,7 +452,8 @@ bool dc_dmub_srv_p_state_delegate(struct dc *dc, bool should_manage_pstate, stru
 			 * that does not use FAMS, we are in an FPO + VActive scenario.
 			 * Assign vactive stretch margin in this case.
 			 */
-			if (!pipe->stream->fpo_in_use) {
+			stream_status = dc_state_get_stream_status(context, pipe->stream);
+			if (stream_status && !stream_status->fpo_in_use) {
 				cmd.fw_assisted_mclk_switch.config_data.vactive_stretch_margin_us = dc->debug.fpo_vactive_margin_us;
 				break;
 			}
@@ -461,7 +464,12 @@ bool dc_dmub_srv_p_state_delegate(struct dc *dc, bool should_manage_pstate, stru
 	for (i = 0, k = 0; context && i < dc->res_pool->pipe_count; i++) {
 		struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
 
-		if (resource_is_pipe_type(pipe, OTG_MASTER) && pipe->stream->fpo_in_use) {
+		stream_status = NULL;
+		if (!resource_is_pipe_type(pipe, OTG_MASTER))
+			continue;
+
+		stream_status = dc_state_get_stream_status(context, pipe->stream);
+		if (stream_status && stream_status->fpo_in_use) {
 			struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
 			uint8_t min_refresh_in_hz = (pipe->stream->timing.min_refresh_in_uhz + 999999) / 1000000;
 

drivers/gpu/drm/amd/display/dc/dc_stream.h

@@ -59,6 +59,7 @@ struct dc_stream_status {
 	struct dc_plane_state *plane_states[MAX_SURFACE_NUM];
 	bool is_abm_supported;
 	struct mall_stream_config mall_stream_config;
+	bool fpo_in_use;
 };
 
 enum hubp_dmdata_mode {
@@ -296,7 +297,6 @@ struct dc_stream_state {
 
 	bool has_non_synchronizable_pclk;
 	bool vblank_synchronized;
-	bool fpo_in_use;
 	bool is_phantom;
 
 	struct luminance_data lumin_data;

drivers/gpu/drm/amd/display/dc/dml/dcn30/dcn30_fpu.c

@@ -387,13 +387,17 @@ void dcn30_fpu_calculate_wm_and_dlg(
 	double dcfclk = context->bw_ctx.dml.vba.DCFCLKState[vlevel][maxMpcComb];
 	bool pstate_en = context->bw_ctx.dml.vba.DRAMClockChangeSupport[vlevel][maxMpcComb] != dm_dram_clock_change_unsupported;
 	unsigned int dummy_latency_index = 0;
+	struct dc_stream_status *stream_status = NULL;
 
 	dc_assert_fp_enabled();
 
 	context->bw_ctx.bw.dcn.clk.fw_based_mclk_switching = false;
 	for (i = 0; i < context->stream_count; i++) {
+		stream_status = NULL;
 		if (context->streams[i])
-			context->streams[i]->fpo_in_use = false;
+			stream_status = dc_state_get_stream_status(context, context->streams[i]);
+		if (stream_status)
+			stream_status->fpo_in_use = false;
 	}
 
 	if (!pstate_en) {

drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c

@@ -2309,6 +2309,7 @@ void dcn32_calculate_wm_and_dlg_fpu(struct dc *dc, struct dc_state *context,
 	bool need_fclk_lat_as_dummy = false;
 	bool is_subvp_p_drr = false;
 	struct dc_stream_state *fpo_candidate_stream = NULL;
+	struct dc_stream_status *stream_status = NULL;
 
 	dc_assert_fp_enabled();
 
@@ -2343,8 +2344,11 @@ void dcn32_calculate_wm_and_dlg_fpu(struct dc *dc, struct dc_state *context,
 
 	context->bw_ctx.bw.dcn.clk.fw_based_mclk_switching = false;
 	for (i = 0; i < context->stream_count; i++) {
+		stream_status = NULL;
 		if (context->streams[i])
-			context->streams[i]->fpo_in_use = false;
+			stream_status = dc_state_get_stream_status(context, context->streams[i]);
+		if (stream_status)
+			stream_status->fpo_in_use = false;
 	}
 
 	if (!pstate_en || (!dc->debug.disable_fpo_optimizations &&
@@ -2352,7 +2356,9 @@ void dcn32_calculate_wm_and_dlg_fpu(struct dc *dc, struct dc_state *context,
 		/* only when the mclk switch can not be natural, is the fw based vblank stretch attempted */
 		fpo_candidate_stream = dcn32_can_support_mclk_switch_using_fw_based_vblank_stretch(dc, context);
 		if (fpo_candidate_stream) {
-			fpo_candidate_stream->fpo_in_use = true;
+			stream_status = dc_state_get_stream_status(context, fpo_candidate_stream);
+			if (stream_status)
+				stream_status->fpo_in_use = true;
 			context->bw_ctx.bw.dcn.clk.fw_based_mclk_switching = true;
 		}
 
@@ -2389,8 +2395,11 @@ void dcn32_calculate_wm_and_dlg_fpu(struct dc *dc, struct dc_state *context,
 				 */
 				context->bw_ctx.bw.dcn.clk.fw_based_mclk_switching = false;
 				for (i = 0; i < context->stream_count; i++) {
+					stream_status = NULL;
 					if (context->streams[i])
-						context->streams[i]->fpo_in_use = false;
+						stream_status = dc_state_get_stream_status(context, context->streams[i]);
+					if (stream_status)
+						stream_status->fpo_in_use = false;
 				}
 				context->bw_ctx.dml.soc.fclk_change_latency_us = dc->clk_mgr->bw_params->wm_table.nv_entries[WM_A].dml_input.fclk_change_latency_us;
 				dcn32_internal_validate_bw(dc, context, pipes, &pipe_cnt, &vlevel, false);

drivers/gpu/drm/amd/display/dc/hwss/dcn32/dcn32_hwseq.c

@@ -601,9 +601,13 @@ void dcn32_update_force_pstate(struct dc *dc, struct dc_state *context)
 	for (i = 0; i < dc->res_pool->pipe_count; i++) {
 		struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
 		struct hubp *hubp = pipe->plane_res.hubp;
+		struct dc_stream_status *stream_status = NULL;
+
+		if (pipe->stream)
+			stream_status = dc_state_get_stream_status(context, pipe->stream);
 
 		if (!pipe->stream || !(dc_state_get_pipe_subvp_type(context, pipe) == SUBVP_MAIN ||
-		    pipe->stream->fpo_in_use)) {
+		    (stream_status && stream_status->fpo_in_use))) {
 			if (hubp && hubp->funcs->hubp_update_force_pstate_disallow)
 				hubp->funcs->hubp_update_force_pstate_disallow(hubp, false);
 			if (hubp && hubp->funcs->hubp_update_force_cursor_pstate_disallow)
@@ -617,6 +621,8 @@ void dcn32_update_force_pstate(struct dc *dc, struct dc_state *context)
 		struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
 		struct pipe_ctx *old_pipe = &dc->current_state->res_ctx.pipe_ctx[i];
 		struct hubp *hubp = pipe->plane_res.hubp;
+		struct dc_stream_status *stream_status = NULL;
+		struct dc_stream_status *old_stream_status = NULL;
 
 		/* Today for MED update type we do not call update clocks. However, for FPO
 		 * the assumption is that update clocks should be called to disable P-State
@@ -630,11 +636,15 @@ void dcn32_update_force_pstate(struct dc *dc, struct dc_state *context)
 		 * time SubVP / FPO was enabled, so there's no need to update / reset it if the
 		 * pipe config has never exited SubVP / FPO.
 		 */
+		if (pipe->stream)
+			stream_status = dc_state_get_stream_status(context, pipe->stream);
+		if (old_pipe->stream)
+			old_stream_status = dc_state_get_stream_status(dc->current_state, old_pipe->stream);
+
 		if (pipe->stream && (dc_state_get_pipe_subvp_type(context, pipe) == SUBVP_MAIN ||
-				pipe->stream->fpo_in_use) &&
-				(!old_pipe->stream ||
-				(dc_state_get_pipe_subvp_type(context, old_pipe) != SUBVP_MAIN &&
-				!old_pipe->stream->fpo_in_use))) {
+				(stream_status && stream_status->fpo_in_use)) &&
+				(!old_pipe->stream || (dc_state_get_pipe_subvp_type(context, old_pipe) != SUBVP_MAIN &&
+				(old_stream_status && !old_stream_status->fpo_in_use)))) {
 			if (hubp && hubp->funcs->hubp_update_force_pstate_disallow)
 				hubp->funcs->hubp_update_force_pstate_disallow(hubp, true);
 			if (hubp && hubp->funcs->hubp_update_force_cursor_pstate_disallow)

drivers/gpu/drm/amd/display/dc/resource/dcn30/dcn30_resource.c

@@ -1966,6 +1966,7 @@ bool dcn30_can_support_mclk_switch_using_fw_based_vblank_stretch(struct dc *dc,
 {
 	int refresh_rate = 0;
 	const int minimum_refreshrate_supported = 120;
+	struct dc_stream_status *stream_status = NULL;
 
 	if (context == NULL || context->streams[0] == NULL)
 		return false;
@@ -1999,7 +2000,12 @@ bool dcn30_can_support_mclk_switch_using_fw_based_vblank_stretch(struct dc *dc,
 	if (context->streams[0]->vrr_active_variable && (dc->debug.disable_fams_gaming == INGAME_FAMS_DISABLE))
 		return false;
 
-	context->streams[0]->fpo_in_use = true;
+	stream_status = dc_state_get_stream_status(context, context->streams[0]);
+
+	if (!stream_status)
+		return false;
+
+	stream_status->fpo_in_use = true;
 
 	return true;
 }