path: root/common/recipes-kernel/linux/linux-yocto-4.14.71/0579-drm-amd-display-Commit-validation-set-from-state.patch

From 597a1c3327738758cd3c19491d3928212de2cc26 Mon Sep 17 00:00:00 2001
From: Harry Wentland <harry.wentland@amd.com>
Date: Mon, 6 Mar 2017 09:43:30 -0500
Subject: [PATCH 0579/4131] drm/amd/display: Commit validation set from state

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 .../drm/amd/display/amdgpu_dm/amdgpu_dm_types.c    |  34 +++---
 drivers/gpu/drm/amd/display/dc/core/dc.c           | 118 +++++++++++++++++++++
 drivers/gpu/drm/amd/display/dc/dc.h                |  16 +++
 3 files changed, 152 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
index 716b440..ee07b8c 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
@@ -2662,20 +2662,22 @@ void amdgpu_dm_atomic_commit_tail(
 	struct drm_device *dev = state->dev;
 	struct amdgpu_device *adev = dev->dev_private;
 	struct amdgpu_display_manager *dm = &adev->dm;
+	struct dm_atomic_state *dm_state;
 	uint32_t i, j;
-	uint32_t commit_streams_count = 0;
 	uint32_t new_crtcs_count = 0;
 	struct drm_crtc *crtc, *pcrtc;
 	struct drm_crtc_state *old_crtc_state;
-	const struct dc_stream *commit_streams[MAX_STREAMS];
 	struct amdgpu_crtc *new_crtcs[MAX_STREAMS];
-	const struct dc_stream *new_stream;
+	const struct dc_stream *new_stream = NULL;
 	unsigned long flags;
 	bool wait_for_vblank = true;
 	struct drm_connector *connector;
 	struct drm_connector_state *old_conn_state;
 
 	drm_atomic_helper_update_legacy_modeset_state(dev, state);
+
+	dm_state = to_dm_atomic_state(state);
+
 	/* update changed items */
 	for_each_crtc_in_state(state, crtc, old_crtc_state, i) {
 		struct amdgpu_crtc *acrtc;
@@ -2706,16 +2708,16 @@ void amdgpu_dm_atomic_commit_tail(
 		 */
 
 		if (modeset_required(new_state)) {
-			struct dm_connector_state *dm_state = NULL;
+			struct dm_connector_state *dm_conn_state = NULL;
 			new_stream = NULL;
 
 			if (aconnector)
-				dm_state = to_dm_connector_state(aconnector->base.state);
+				dm_conn_state = to_dm_connector_state(aconnector->base.state);
 
 			new_stream = create_stream_for_sink(
 					aconnector,
 					&crtc->state->mode,
-					dm_state);
+					dm_conn_state);
 
 			DRM_INFO("Atomic commit: SET crtc id %d: [%p]\n", acrtc->crtc_id, acrtc);
 
@@ -2743,6 +2745,13 @@ void amdgpu_dm_atomic_commit_tail(
 			if (acrtc->stream)
 				remove_stream(adev, acrtc);
 
+			/* TODO clean this stupid hack */
+			for (j = 0; j < dm_state->set_count; j++)
+				if (dm_state->set[j].stream->priv == acrtc) {
+					ASSERT(acrtc->stream == NULL);
+					new_stream = dm_state->set[j].stream;
+					break;
+				}
 			/*
 			 * this loop saves set mode crtcs
 			 * we needed to enable vblanks once all
@@ -2801,15 +2810,6 @@ void amdgpu_dm_atomic_commit_tail(
 			dm_error("%s: Failed to update stream scaling!\n", __func__);
 	}
 
-	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
-
-		struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
-
-		if (acrtc->stream) {
-			commit_streams[commit_streams_count] = acrtc->stream;
-			++commit_streams_count;
-		}
-	}
 
 	/*
 	 * Add streams after required streams from new and replaced streams
@@ -2838,7 +2838,8 @@ void amdgpu_dm_atomic_commit_tail(
 	}
 
 	/* DC is optimized not to do anything if 'streams' didn't change. */
-	WARN_ON(!dc_commit_streams(dm->dc, commit_streams, commit_streams_count));
+	WARN_ON(!dc_commit_validation_set(dm->dc, dm_state->set,
+					  dm_state->set_count));
 
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
@@ -3196,6 +3197,7 @@ int amdgpu_dm_atomic_check(struct drm_device *dev,
 			}
 
 			new_stream = create_stream_for_sink(aconnector, &crtc_state->mode, dm_conn_state);
+			new_stream->priv = acrtc;
 
 			/*
 			 * we can have no stream on ACTION_SET if a display
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 1d2e421e..b50fc0d 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -841,6 +841,24 @@ static void program_timing_sync(
 	}
 }
 
+static bool set_changed(
+		struct core_dc *dc,
+		const struct dc_validation_set set[],
+		uint8_t set_count)
+{
+	uint8_t i;
+
+	if (set_count != dc->current_context->stream_count)
+		return true;
+
+	for (i = 0; i < dc->current_context->stream_count; i++) {
+		if (&dc->current_context->streams[i]->public != set[i].stream)
+			return true;
+	}
+
+	return false;
+}
+
 static bool streams_changed(
 		struct core_dc *dc,
 		const struct dc_stream *streams[],
@@ -896,6 +914,106 @@ bool dc_enable_stereo(
 	return ret;
 }
 
+/* TODO operate on validation set (or something like it) */
+bool dc_commit_validation_set(
+	const struct dc *dc,
+	const struct dc_validation_set set[],
+	uint8_t set_count)
+{
+	struct core_dc *core_dc = DC_TO_CORE(dc);
+	struct dc_bios *dcb = core_dc->ctx->dc_bios;
+	enum dc_status result = DC_ERROR_UNEXPECTED;
+	struct validate_context *context;
+	struct pipe_ctx *pipe;
+	int i, j, k, l;
+
+	/* TODO check validation set changed */
+	if (false == set_changed(core_dc, set, set_count))
+		return DC_OK;
+
+	dm_logger_write(core_dc->ctx->logger, LOG_DC, "%s: %d streams\n",
+				__func__, set_count);
+
+	for (i = 0; i < set_count; i++)
+		dc_stream_log(set[i].stream,
+			      core_dc->ctx->logger,
+			      LOG_DC);
+
+	context = dm_alloc(sizeof(struct validate_context));
+	if (context == NULL)
+		goto context_alloc_fail;
+
+	/* TODO no need for validation. just rebuild context */
+	/* TODO check context is created deterministically */
+	result = core_dc->res_pool->funcs->validate_with_context(core_dc, set,
+								 set_count,
+								 context,
+								 core_dc->current_context);
+	if (result != DC_OK) {
+		dm_logger_write(core_dc->ctx->logger, LOG_ERROR,
+					"%s: Context validation failed! dc_status:%d\n",
+					__func__,
+					result);
+		BREAK_TO_DEBUGGER();
+		dc_resource_validate_ctx_destruct(context);
+		goto fail;
+	}
+
+	if (!dcb->funcs->is_accelerated_mode(dcb))
+		core_dc->hwss.enable_accelerated_mode(core_dc);
+
+	if (result == DC_OK)
+		result = core_dc->hwss.apply_ctx_to_hw(core_dc, context);
+
+	program_timing_sync(core_dc, context);
+
+	for (i = 0; i < context->stream_count; i++) {
+		const struct core_sink *sink = context->streams[i]->sink;
+
+		for (j = 0; j < context->stream_status[i].surface_count; j++) {
+			struct core_surface *surface =
+					DC_SURFACE_TO_CORE(context->stream_status[i].surfaces[j]);
+
+			core_dc->hwss.apply_ctx_for_surface(core_dc, surface, context);
+
+			/*
+			 * enable stereo
+			 * TODO rework dc_enable_stereo call to work with validation sets?
+			 */
+			for (k = 0; k < MAX_PIPES; k++) {
+				pipe = &context->res_ctx.pipe_ctx[k];
+
+				for (l = 0 ; pipe && l < context->stream_count; l++)  {
+					if (context->streams[l] &&
+					    context->streams[l] == pipe->stream &&
+					    core_dc->hwss.setup_stereo)
+						core_dc->hwss.setup_stereo(pipe, core_dc);
+				}
+			}
+		}
+
+		CONN_MSG_MODE(sink->link, "{%dx%d, %dx%d@%dKhz}",
+				context->streams[i]->public.timing.h_addressable,
+				context->streams[i]->public.timing.v_addressable,
+				context->streams[i]->public.timing.h_total,
+				context->streams[i]->public.timing.v_total,
+				context->streams[i]->public.timing.pix_clk_khz);
+	}
+
+	dc_resource_validate_ctx_destruct(core_dc->current_context);
+	dm_free(core_dc->current_context);
+
+	core_dc->current_context = context;
+
+	return (result == DC_OK);
+
+fail:
+	dm_free(context);
+
+context_alloc_fail:
+	return (result == DC_OK);
+}
+
 bool dc_commit_streams(
 	struct dc *dc,
 	const struct dc_stream *streams[],
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 93aff82..5487fb1 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -481,6 +481,8 @@ struct dc_stream {
 	/* TODO: ABM info (DMCU) */
 	/* TODO: PSR info */
 	/* TODO: CEA VIC */
+
+	void *priv;
 };
 
 struct dc_stream_update {
@@ -580,6 +582,20 @@ void dc_resource_validate_ctx_copy_construct(
 void dc_resource_validate_ctx_destruct(struct validate_context *context);
 
 /*
+ * TODO update to make it about validation sets
+ * Set up streams and links associated to drive sinks
+ * The streams parameter is an absolute set of all active streams.
+ *
+ * After this call:
+ *   Phy, Encoder, Timing Generator are programmed and enabled.
+ *   New streams are enabled with blank stream; no memory read.
+ */
+bool dc_commit_validation_set(
+		const struct dc *dc,
+		const struct dc_validation_set set[],
+		uint8_t set_count);
+
+/*
  * Set up streams and links associated to drive sinks
  * The streams parameter is an absolute set of all active streams.
  *
-- 
2.7.4