drm/amd/display: decouple dsc adjustment out of enablement

[why]
dsc adjustment is allowed via stream update sequence.
dsc enablement is only allowed via commit stream sequence.
with the current unified dsc set function, it is hard
to determine which sequence it is called by.
The solution is to decouple dsc adjustment out of enablement
sequence so we can handle them separately.

[how]
decouple dsc adjustment out of enablement.
Signed-off-by: Wenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: Nikola Cornij <Nikola.Cornij@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1746,14 +1746,9 @@ static void commit_planes_do_stream_update(struct dc *dc,
 
 #if defined(CONFIG_DRM_AMD_DC_DSC_SUPPORT)
 			if (stream_update->dsc_config && dc->hwss.pipe_control_lock_global) {
-				bool enable_dsc = (stream_update->dsc_config->num_slices_h && stream_update->dsc_config->num_slices_v);
-
 				dc->hwss.pipe_control_lock_global(dc, pipe_ctx, true);
-				dp_set_dsc_enable(pipe_ctx, enable_dsc);
+				dp_update_dsc_config(pipe_ctx);
 				dc->hwss.pipe_control_lock_global(dc, pipe_ctx, false);
-
-				if (!stream->is_dsc_enabled)
-					dc->res_pool->funcs->remove_dsc_from_stream_resource(dc, context, stream);
 			}
 #endif
 			/* Full fe update*/

drivers/gpu/drm/amd/display/dc/core/dc_link.c

@@ -2817,7 +2817,7 @@ void core_link_disable_stream(struct pipe_ctx *pipe_ctx, int option)
 
 	disable_link(pipe_ctx->stream->link, pipe_ctx->stream->signal);
 #ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
-	if (pipe_ctx->stream->is_dsc_enabled &&
+	if (pipe_ctx->stream->timing.flags.DSC &&
 			dc_is_dp_signal(pipe_ctx->stream->signal)) {
 		dp_set_dsc_enable(pipe_ctx, false);
 	}

drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c

@@ -467,41 +467,40 @@ static void dp_set_dsc_on_stream(struct pipe_ctx *pipe_ctx, bool enable)
 
 bool dp_set_dsc_enable(struct pipe_ctx *pipe_ctx, bool enable)
 {
-	struct dc_stream_state *stream = pipe_ctx->stream;
 	struct display_stream_compressor *dsc = pipe_ctx->stream_res.dsc;
 	bool result = false;
 
+	if (!pipe_ctx->stream->timing.flags.DSC)
+		goto out;
 	if (!dsc)
 		goto out;
 
-	if (enable && stream->is_dsc_enabled) {
-		/* update dsc stream */
-		dp_set_dsc_on_stream(pipe_ctx, true);
-		stream->is_dsc_enabled = true;
-		result = true;
-	} else if (enable && !stream->is_dsc_enabled) {
-		/* enable dsc on non dsc stream */
+	if (enable) {
 		if (dp_set_dsc_on_rx(pipe_ctx, true)) {
 			dp_set_dsc_on_stream(pipe_ctx, true);
-			stream->is_dsc_enabled = true;
 			result = true;
-		} else {
-			stream->is_dsc_enabled = false;
-			result = false;
 		}
-	} else if (!enable && stream->is_dsc_enabled) {
-		/* disable dsc on dsc stream */
+	} else {
 		dp_set_dsc_on_rx(pipe_ctx, false);
 		dp_set_dsc_on_stream(pipe_ctx, false);
-		stream->is_dsc_enabled = false;
-		result = true;
-	} else {
-		/* disable dsc on non dsc stream */
 		result = true;
 	}
 out:
 	return result;
 }
 
+bool dp_update_dsc_config(struct pipe_ctx *pipe_ctx)
+{
+	struct display_stream_compressor *dsc = pipe_ctx->stream_res.dsc;
+
+	if (!pipe_ctx->stream->timing.flags.DSC)
+		return false;
+	if (!dsc)
+		return false;
+
+	dp_set_dsc_on_stream(pipe_ctx, true);
+	return true;
+}
+
 #endif
 

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c

@@ -1318,7 +1318,7 @@ static void release_dsc(struct resource_context *res_ctx,
 
 
 #ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
-enum dc_status dcn20_add_dsc_to_stream_resource(struct dc *dc,
+static enum dc_status add_dsc_to_stream_resource(struct dc *dc,
 		struct dc_state *dc_ctx,
 		struct dc_stream_state *dc_stream)
 {
@@ -1348,7 +1348,7 @@ enum dc_status dcn20_add_dsc_to_stream_resource(struct dc *dc,
 }
 
 
-enum dc_status dcn20_remove_dsc_from_stream_resource(struct dc *dc,
+static enum dc_status remove_dsc_from_stream_resource(struct dc *dc,
 		struct dc_state *new_ctx,
 		struct dc_stream_state *dc_stream)
 {
@@ -1390,7 +1390,7 @@ enum dc_status dcn20_add_stream_to_ctx(struct dc *dc, struct dc_state *new_ctx,
 #ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
 	/* Get a DSC if required and available */
 	if (result == DC_OK && dc_stream->timing.flags.DSC)
-		result = dcn20_add_dsc_to_stream_resource(dc, new_ctx, dc_stream);
+		result = add_dsc_to_stream_resource(dc, new_ctx, dc_stream);
 #endif
 
 	if (result == DC_OK)
@@ -1405,7 +1405,7 @@ enum dc_status dcn20_remove_stream_from_ctx(struct dc *dc, struct dc_state *new_
 	enum dc_status result = DC_OK;
 
 #ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
-	result = dcn20_remove_dsc_from_stream_resource(dc, new_ctx, dc_stream);
+	result = remove_dsc_from_stream_resource(dc, new_ctx, dc_stream);
 #endif
 
 	return result;
@@ -2435,10 +2435,6 @@ static struct resource_funcs dcn20_res_pool_funcs = {
 	.populate_dml_writeback_from_context = dcn20_populate_dml_writeback_from_context,
 	.get_default_swizzle_mode = dcn20_get_default_swizzle_mode,
 	.set_mcif_arb_params = dcn20_set_mcif_arb_params,
-#ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
-	.add_dsc_to_stream_resource = dcn20_add_dsc_to_stream_resource,
-	.remove_dsc_from_stream_resource = dcn20_remove_dsc_from_stream_resource,
-#endif
 	.find_first_free_match_stream_enc_for_link = dcn10_find_first_free_match_stream_enc_for_link
 };
 

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.h

@@ -121,8 +121,6 @@ enum dc_status dcn20_build_mapped_resource(const struct dc *dc, struct dc_state
 enum dc_status dcn20_add_stream_to_ctx(struct dc *dc, struct dc_state *new_ctx, struct dc_stream_state *dc_stream);
 enum dc_status dcn20_remove_stream_from_ctx(struct dc *dc, struct dc_state *new_ctx, struct dc_stream_state *dc_stream);
 enum dc_status dcn20_get_default_swizzle_mode(struct dc_plane_state *plane_state);
-enum dc_status dcn20_add_dsc_to_stream_resource(struct dc *dc, struct dc_state *dc_ctx, struct dc_stream_state *dc_stream);
-enum dc_status dcn20_remove_dsc_from_stream_resource(struct dc *dc, struct dc_state *new_ctx, struct dc_stream_state *dc_stream);
 
 void dcn20_patch_bounding_box(
 		struct dc *dc,

drivers/gpu/drm/amd/display/dc/inc/core_types.h

@@ -148,15 +148,6 @@ struct resource_funcs {
 			int pipe_cnt);
 #endif
 
-#ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
-enum dc_status (*add_dsc_to_stream_resource)(struct dc *dc,
-			struct dc_state *dc_ctx,
-			struct dc_stream_state *dc_stream);
-
-enum dc_status (*remove_dsc_from_stream_resource)(struct dc *dc,
-			struct dc_state *new_ctx,
-			struct dc_stream_state *dc_stream);
-#endif
 };
 
 struct audio_support{

drivers/gpu/drm/amd/display/dc/inc/dc_link_dp.h

@@ -66,6 +66,7 @@ void dp_enable_mst_on_sink(struct dc_link *link, bool enable);
 void dp_set_fec_ready(struct dc_link *link, bool ready);
 void dp_set_fec_enable(struct dc_link *link, bool enable);
 bool dp_set_dsc_enable(struct pipe_ctx *pipe_ctx, bool enable);
+bool dp_update_dsc_config(struct pipe_ctx *pipe_ctx);
 #endif
 
 #endif /* __DC_LINK_DP_H__ */