Merge "drm/msm/sde: output black frame during resume operation"

drivers/gpu/drm/msm/msm_drv.c

@@ -1923,8 +1923,75 @@ static struct drm_driver msm_driver = {
 #ifdef CONFIG_PM_SLEEP
 static int msm_pm_suspend(struct device *dev)
 {
-	struct drm_device *ddev = dev_get_drvdata(dev);
+	struct drm_device *ddev;
+	struct drm_modeset_acquire_ctx *ctx;
+	struct drm_connector *conn;
+	struct drm_atomic_state *state;
+	struct drm_crtc_state *crtc_state;
+	struct msm_drm_private *priv;
+	int ret = 0;
 
+	if (!dev)
+		return -EINVAL;
+
+	ddev = dev_get_drvdata(dev);
+	if (!ddev || !ddev->dev_private)
+		return -EINVAL;
+
+	priv = ddev->dev_private;
+	SDE_EVT32(0);
+
+	/* acquire modeset lock(s) */
+	drm_modeset_lock_all(ddev);
+	ctx = ddev->mode_config.acquire_ctx;
+
+	/* save current state for resume */
+	if (priv->suspend_state)
+		drm_atomic_state_free(priv->suspend_state);
+	priv->suspend_state = drm_atomic_helper_duplicate_state(ddev, ctx);
+	if (IS_ERR_OR_NULL(priv->suspend_state)) {
+		DRM_ERROR("failed to back up suspend state\n");
+		priv->suspend_state = NULL;
+		goto unlock;
+	}
+
+	/* create atomic state to disable all CRTCs */
+	state = drm_atomic_state_alloc(ddev);
+	if (IS_ERR_OR_NULL(state)) {
+		DRM_ERROR("failed to allocate crtc disable state\n");
+		goto unlock;
+	}
+
+	state->acquire_ctx = ctx;
+	drm_for_each_connector(conn, ddev) {
+
+		if (!conn->state || !conn->state->crtc ||
+				conn->dpms != DRM_MODE_DPMS_ON)
+			continue;
+
+		/* force CRTC to be inactive */
+		crtc_state = drm_atomic_get_crtc_state(state,
+				conn->state->crtc);
+		if (IS_ERR_OR_NULL(crtc_state)) {
+			DRM_ERROR("failed to get crtc %d state\n",
+					conn->state->crtc->base.id);
+			drm_atomic_state_free(state);
+			goto unlock;
+		}
+		crtc_state->active = false;
+	}
+
+	/* commit the "disable all" state */
+	ret = drm_atomic_commit(state);
+	if (ret < 0) {
+		DRM_ERROR("failed to disable crtcs, %d\n", ret);
+		drm_atomic_state_free(state);
+	}
+
+unlock:
+	drm_modeset_unlock_all(ddev);
+
+	/* disable hot-plug polling */
 	drm_kms_helper_poll_disable(ddev);
 
 	return 0;
@@ -1932,8 +1999,38 @@ static int msm_pm_suspend(struct device *dev)
 
 static int msm_pm_resume(struct device *dev)
 {
-	struct drm_device *ddev = dev_get_drvdata(dev);
+	struct drm_device *ddev;
+	struct msm_drm_private *priv;
+	int ret;
 
+	if (!dev)
+		return -EINVAL;
+
+	ddev = dev_get_drvdata(dev);
+	if (!ddev || !ddev->dev_private)
+		return -EINVAL;
+
+	priv = ddev->dev_private;
+
+	SDE_EVT32(priv->suspend_state != NULL);
+
+	drm_mode_config_reset(ddev);
+
+	drm_modeset_lock_all(ddev);
+
+	if (priv->suspend_state) {
+		priv->suspend_state->acquire_ctx =
+			ddev->mode_config.acquire_ctx;
+		ret = drm_atomic_commit(priv->suspend_state);
+		if (ret < 0) {
+			DRM_ERROR("failed to restore state, %d\n", ret);
+			drm_atomic_state_free(priv->suspend_state);
+		}
+		priv->suspend_state = NULL;
+	}
+	drm_modeset_unlock_all(ddev);
+
+	/* enable hot-plug polling */
 	drm_kms_helper_poll_enable(ddev);
 
 	return 0;

drivers/gpu/drm/msm/msm_drv.h

@@ -367,6 +367,9 @@ struct msm_drm_private {
 
 	struct msm_vblank_ctrl vblank_ctrl;
 
+	/* saved atomic state during system suspend */
+	struct drm_atomic_state *suspend_state;
+
 	/* list of clients waiting for events */
 	struct list_head client_event_list;
 };
@@ -414,6 +417,15 @@ void __msm_fence_worker(struct work_struct *work);
 		(_cb)->func = _func;                         \
 	} while (0)
 
+static inline bool msm_is_suspend_state(struct drm_device *dev)
+{
+	if (!dev || !dev->dev_private)
+		return false;
+
+	return ((struct msm_drm_private *)dev->dev_private)->suspend_state !=
+		NULL;
+}
+
 int msm_atomic_commit(struct drm_device *dev,
 		struct drm_atomic_state *state, bool async);
 

drivers/gpu/drm/msm/sde/sde_crtc.c

@@ -57,7 +57,17 @@
 
 static inline struct sde_kms *_sde_crtc_get_kms(struct drm_crtc *crtc)
 {
-	struct msm_drm_private *priv = crtc->dev->dev_private;
+	struct msm_drm_private *priv;
+
+	if (!crtc || !crtc->dev || !crtc->dev->dev_private) {
+		SDE_ERROR("invalid crtc\n");
+		return NULL;
+	}
+	priv = crtc->dev->dev_private;
+	if (!priv || !priv->kms) {
+		SDE_ERROR("invalid kms\n");
+		return NULL;
+	}
 
 	return to_sde_kms(priv->kms);
 }
@@ -77,10 +87,10 @@ static void sde_crtc_destroy(struct drm_crtc *crtc)
 	sde_cp_crtc_destroy_properties(crtc);
 
 	debugfs_remove_recursive(sde_crtc->debugfs_root);
-	mutex_destroy(&sde_crtc->crtc_lock);
 	sde_fence_deinit(&sde_crtc->output_fence);
 
 	drm_crtc_cleanup(crtc);
+	mutex_destroy(&sde_crtc->crtc_lock);
 	kfree(sde_crtc);
 }
 
@@ -940,6 +950,112 @@ end:
 	return;
 }
 
+/**
+ * _sde_crtc_vblank_enable_nolock - update power resource and vblank request
+ * @sde_crtc: Pointer to sde crtc structure
+ * @enable: Whether to enable/disable vblanks
+ */
+static void _sde_crtc_vblank_enable_nolock(
+		struct sde_crtc *sde_crtc, bool enable)
+{
+	struct drm_device *dev;
+	struct drm_crtc *crtc;
+	struct drm_encoder *enc;
+	struct msm_drm_private *priv;
+	struct sde_kms *sde_kms;
+
+	if (!sde_crtc) {
+		SDE_ERROR("invalid crtc\n");
+		return;
+	}
+
+	crtc = &sde_crtc->base;
+	dev = crtc->dev;
+	priv = dev->dev_private;
+
+	if (!priv->kms) {
+		SDE_ERROR("invalid kms\n");
+		return;
+	}
+	sde_kms = to_sde_kms(priv->kms);
+
+	if (enable) {
+		sde_power_resource_enable(&priv->phandle,
+				sde_kms->core_client, true);
+		list_for_each_entry(enc, &dev->mode_config.encoder_list, head) {
+			if (enc->crtc != crtc)
+				continue;
+
+			SDE_EVT32(DRMID(crtc), DRMID(enc), enable);
+
+			sde_encoder_register_vblank_callback(enc,
+					sde_crtc_vblank_cb, (void *)crtc);
+		}
+	} else {
+		list_for_each_entry(enc, &dev->mode_config.encoder_list, head) {
+			if (enc->crtc != crtc)
+				continue;
+
+			SDE_EVT32(DRMID(crtc), DRMID(enc), enable);
+
+			sde_encoder_register_vblank_callback(enc, NULL, NULL);
+		}
+		sde_power_resource_enable(&priv->phandle,
+				sde_kms->core_client, false);
+	}
+}
+
+/**
+ * _sde_crtc_set_suspend - notify crtc of suspend enable/disable
+ * @crtc: Pointer to drm crtc object
+ * @enable: true to enable suspend, false to indicate resume
+ */
+static void _sde_crtc_set_suspend(struct drm_crtc *crtc, bool enable)
+{
+	struct sde_crtc *sde_crtc;
+	struct msm_drm_private *priv;
+	struct sde_kms *sde_kms;
+
+	if (!crtc || !crtc->dev || !crtc->dev->dev_private) {
+		SDE_ERROR("invalid crtc\n");
+		return;
+	}
+	sde_crtc = to_sde_crtc(crtc);
+	priv = crtc->dev->dev_private;
+
+	if (!priv->kms) {
+		SDE_ERROR("invalid crtc kms\n");
+		return;
+	}
+	sde_kms = to_sde_kms(priv->kms);
+
+	SDE_DEBUG("crtc%d suspend = %d\n", crtc->base.id, enable);
+
+	mutex_lock(&sde_crtc->crtc_lock);
+
+	/*
+	 * Update CP on suspend/resume transitions
+	 */
+	if (enable && !sde_crtc->suspend)
+		sde_cp_crtc_suspend(crtc);
+	else if (!enable && sde_crtc->suspend)
+		sde_cp_crtc_resume(crtc);
+
+	/*
+	 * If the vblank refcount != 0, release a power reference on suspend
+	 * and take it back during resume (if it is still != 0).
+	 */
+	if (sde_crtc->suspend == enable)
+		SDE_DEBUG("crtc%d suspend already set to %d, ignoring update\n",
+				crtc->base.id, enable);
+	else if (atomic_read(&sde_crtc->vblank_refcount) != 0)
+		_sde_crtc_vblank_enable_nolock(sde_crtc, !enable);
+
+	sde_crtc->suspend = enable;
+
+	mutex_unlock(&sde_crtc->crtc_lock);
+}
+
 /**
  * sde_crtc_duplicate_state - state duplicate hook
  * @crtc: Pointer to drm crtc structure
@@ -990,6 +1106,10 @@ static void sde_crtc_reset(struct drm_crtc *crtc)
 		return;
 	}
 
+	/* revert suspend actions, if necessary */
+	if (msm_is_suspend_state(crtc->dev))
+		_sde_crtc_set_suspend(crtc, false);
+
 	/* remove previous state, if present */
 	if (crtc->state) {
 		sde_crtc_destroy_state(crtc, crtc->state);
@@ -1015,25 +1135,32 @@ static void sde_crtc_reset(struct drm_crtc *crtc)
 
 static void sde_crtc_disable(struct drm_crtc *crtc)
 {
-	struct msm_drm_private *priv;
-	struct sde_crtc *sde_crtc;
 	struct drm_encoder *encoder;
+	struct sde_crtc *sde_crtc;
 	struct sde_kms *sde_kms;
+	struct msm_drm_private *priv;
 
-	if (!crtc) {
+	if (!crtc || !crtc->dev || !crtc->state) {
 		SDE_ERROR("invalid crtc\n");
 		return;
 	}
 	sde_crtc = to_sde_crtc(crtc);
 	sde_kms = _sde_crtc_get_kms(crtc);
+	if (!sde_kms || !sde_kms->dev || !sde_kms->dev->dev_private) {
+		SDE_ERROR("invalid kms handle\n");
+		return;
+	}
 	priv = sde_kms->dev->dev_private;
 
 	SDE_DEBUG("crtc%d\n", crtc->base.id);
 
+	if (msm_is_suspend_state(crtc->dev))
+		_sde_crtc_set_suspend(crtc, true);
+
 	mutex_lock(&sde_crtc->crtc_lock);
 	SDE_EVT32(DRMID(crtc));
 
-	if (atomic_read(&sde_crtc->vblank_refcount)) {
+	if (atomic_read(&sde_crtc->vblank_refcount) && !sde_crtc->suspend) {
 		SDE_ERROR("crtc%d invalid vblank refcount\n",
 				crtc->base.id);
 		SDE_EVT32(DRMID(crtc));
@@ -1262,40 +1389,36 @@ end:
 
 int sde_crtc_vblank(struct drm_crtc *crtc, bool en)
 {
-	struct sde_crtc *sde_crtc = to_sde_crtc(crtc);
-	struct drm_encoder *encoder;
-	struct drm_device *dev = crtc->dev;
+	struct sde_crtc *sde_crtc;
+	int rc = 0;
 
+	if (!crtc) {
+		SDE_ERROR("invalid crtc\n");
+		return -EINVAL;
+	}
+	sde_crtc = to_sde_crtc(crtc);
+
+	mutex_lock(&sde_crtc->crtc_lock);
 	if (en && atomic_inc_return(&sde_crtc->vblank_refcount) == 1) {
 		SDE_DEBUG("crtc%d vblank enable\n", crtc->base.id);
+		if (!sde_crtc->suspend)
+			_sde_crtc_vblank_enable_nolock(sde_crtc, true);
 	} else if (!en && atomic_read(&sde_crtc->vblank_refcount) < 1) {
 		SDE_ERROR("crtc%d invalid vblank disable\n", crtc->base.id);
-		return -EINVAL;
+		rc = -EINVAL;
 	} else if (!en && atomic_dec_return(&sde_crtc->vblank_refcount) == 0) {
 		SDE_DEBUG("crtc%d vblank disable\n", crtc->base.id);
+		if (!sde_crtc->suspend)
+			_sde_crtc_vblank_enable_nolock(sde_crtc, false);
 	} else {
 		SDE_DEBUG("crtc%d vblank %s refcount:%d\n",
 				crtc->base.id,
 				en ? "enable" : "disable",
 				atomic_read(&sde_crtc->vblank_refcount));
-		return 0;
 	}
 
-	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
-		if (encoder->crtc != crtc)
-			continue;
-
-		SDE_EVT32(DRMID(crtc), en);
-
-		if (en)
-			sde_encoder_register_vblank_callback(encoder,
-					sde_crtc_vblank_cb, (void *)crtc);
-		else
-			sde_encoder_register_vblank_callback(encoder, NULL,
-					NULL);
-	}
-
-	return 0;
+	mutex_unlock(&sde_crtc->crtc_lock);
+	return rc;
 }
 
 void sde_crtc_cancel_pending_flip(struct drm_crtc *crtc,
@@ -1739,6 +1862,7 @@ struct drm_crtc *sde_crtc_init(struct drm_device *dev,
 	crtc->dev = dev;
 	atomic_set(&sde_crtc->vblank_refcount, 0);
 
+	mutex_init(&sde_crtc->crtc_lock);
 	spin_lock_init(&sde_crtc->spin_lock);
 	atomic_set(&sde_crtc->frame_pending, 0);
 
@@ -1760,7 +1884,6 @@ struct drm_crtc *sde_crtc_init(struct drm_device *dev,
 	snprintf(sde_crtc->name, SDE_CRTC_NAME_SIZE, "crtc%u", crtc->base.id);
 
 	/* initialize output fence support */
-	mutex_init(&sde_crtc->crtc_lock);
 	sde_fence_init(&sde_crtc->output_fence, sde_crtc->name, crtc->base.id);
 
 	/* initialize debugfs support */

drivers/gpu/drm/msm/sde/sde_crtc.h

@@ -82,6 +82,7 @@ struct sde_crtc_frame_event {
  * @vblank_cb_count : count of vblank callback since last reset
  * @vblank_cb_time  : ktime at vblank count reset
  * @vblank_refcount : reference count for vblank enable request
+ * @suspend         : whether or not a suspend operation is in progress
  * @feature_list  : list of color processing features supported on a crtc
  * @active_list   : list of color processing features are active
  * @dirty_list    : list of color processing features are dirty
@@ -117,6 +118,7 @@ struct sde_crtc {
 	u32 vblank_cb_count;
 	ktime_t vblank_cb_time;
 	atomic_t vblank_refcount;
+	bool suspend;
 
 	struct list_head feature_list;
 	struct list_head active_list;

drivers/gpu/drm/msm/sde/sde_kms.c

@@ -328,24 +328,12 @@ static int sde_debugfs_danger_init(struct sde_kms *sde_kms,
 
 static int sde_kms_enable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
 {
-	struct sde_kms *sde_kms = to_sde_kms(kms);
-	struct drm_device *dev = sde_kms->dev;
-	struct msm_drm_private *priv = dev->dev_private;
-
-	sde_power_resource_enable(&priv->phandle, sde_kms->core_client, true);
-
 	return sde_crtc_vblank(crtc, true);
 }
 
 static void sde_kms_disable_vblank(struct msm_kms *kms, struct drm_crtc *crtc)
 {
-	struct sde_kms *sde_kms = to_sde_kms(kms);
-	struct drm_device *dev = sde_kms->dev;
-	struct msm_drm_private *priv = dev->dev_private;
-
 	sde_crtc_vblank(crtc, false);
-
-	sde_power_resource_enable(&priv->phandle, sde_kms->core_client, false);
 }
 
 static void sde_kms_prepare_commit(struct msm_kms *kms,

drivers/gpu/drm/msm/sde/sde_plane.c

@@ -34,6 +34,14 @@
 #include "sde_plane.h"
 #include "sde_color_processing.h"
 
+static bool suspend_blank = true;
+module_param(suspend_blank, bool, 0400);
+MODULE_PARM_DESC(suspend_blank,
+		"If set, active planes will force their outputs to black,\n"
+		"by temporarily enabling the color fill, when recovering\n"
+		"from a system resume instead of attempting to display the\n"
+		"last provided frame buffer.");
+
 #define SDE_DEBUG_PLANE(pl, fmt, ...) SDE_DEBUG("plane%d " fmt,\
 		(pl) ? (pl)->base.base.id : -1, ##__VA_ARGS__)
 
@@ -138,6 +146,7 @@ struct sde_plane {
 	struct sde_debugfs_regset32 debugfs_src;
 	struct sde_debugfs_regset32 debugfs_scaler;
 	struct sde_debugfs_regset32 debugfs_csc;
+	bool debugfs_default_scale;
 };
 
 #define to_sde_plane(x) container_of(x, struct sde_plane, base)
@@ -686,9 +695,20 @@ static int _sde_plane_setup_scaler3_lut(struct sde_phy_plane *pp,
 		struct sde_plane_state *pstate)
 {
 	struct sde_plane *psde = pp->sde_plane;
-	struct sde_hw_scaler3_cfg *cfg = pp->scaler3_cfg;
+	struct sde_hw_scaler3_cfg *cfg;
 	int ret = 0;
 
+	if (!pp || !pp->scaler3_cfg) {
+		SDE_ERROR("invalid args\n");
+		return -EINVAL;
+	} else if (!pstate) {
+		/* pstate is expected to be null on forced color fill */
+		SDE_DEBUG("null pstate\n");
+		return -EINVAL;
+	}
+
+	cfg = pp->scaler3_cfg;
+
 	cfg->dir_lut = msm_property_get_blob(
 			&psde->property_info,
 			pstate->property_blobs, &cfg->dir_len,
@@ -723,6 +743,7 @@ static void _sde_plane_setup_scaler3(struct sde_phy_plane *pp,
 	}
 
 	memset(scale_cfg, 0, sizeof(*scale_cfg));
+	memset(&pp->pixel_ext, 0, sizeof(struct sde_hw_pixel_ext));
 
 	decimated = DECIMATED_DIMENSION(src_w,
 			pp->pipe_cfg.horz_decimation);
@@ -1070,7 +1091,8 @@ static void _sde_plane_setup_scaler(struct sde_phy_plane *pp,
 		int error;
 
 		error = _sde_plane_setup_scaler3_lut(pp, pstate);
-		if (error || !pp->pixel_ext_usr) {
+		if (error || !pp->pixel_ext_usr ||
+				psde->debugfs_default_scale) {
 			memset(pe, 0, sizeof(struct sde_hw_pixel_ext));
 			/* calculate default config for QSEED3 */
 			_sde_plane_setup_scaler3(pp,
@@ -1081,7 +1103,8 @@ static void _sde_plane_setup_scaler(struct sde_phy_plane *pp,
 					pp->scaler3_cfg, fmt,
 					chroma_subsmpl_h, chroma_subsmpl_v);
 		}
-	} else if (!pp->pixel_ext_usr) {
+	} else if (!pp->pixel_ext_usr || !pstate ||
+			psde->debugfs_default_scale) {
 		uint32_t deci_dim, i;
 
 		/* calculate default configuration for QSEED2 */
@@ -1701,8 +1724,8 @@ void sde_plane_flush(struct drm_plane *plane)
 	 */
 	list_for_each_entry(pp, &psde->phy_plane_head, phy_plane_list) {
 		if (psde->is_error)
-		/* force white frame with 0% alpha pipe output on error */
-			_sde_plane_color_fill(pp, 0xFFFFFF, 0x0);
+		/* force white frame with 100% alpha pipe output on error */
+			_sde_plane_color_fill(pp, 0xFFFFFF, 0xFF);
 		else if (pp->color_fill & SDE_PLANE_COLOR_FILL_FLAG)
 			/* force 100% alpha */
 			_sde_plane_color_fill(pp, pp->color_fill, 0xFF);
@@ -1711,6 +1734,10 @@ void sde_plane_flush(struct drm_plane *plane)
 			pp->pipe_hw->ops.setup_csc(pp->pipe_hw, pp->csc_ptr);
 	}
 
+	/* force black color fill during suspend */
+	if (msm_is_suspend_state(plane->dev) && suspend_blank)
+		_sde_plane_color_fill(pp, 0x0, 0x0);
+
 	/* flag h/w flush complete */
 	if (plane->state)
 		to_sde_plane_state(plane->state)->pending = false;
@@ -2582,6 +2609,10 @@ static void _sde_plane_init_debugfs(struct sde_plane *psde,
 		sde_debugfs_create_regset32("scaler_blk", S_IRUGO,
 				psde->debugfs_root,
 				&psde->debugfs_scaler);
+		debugfs_create_bool("default_scaling",
+				0644,
+				psde->debugfs_root,
+				&psde->debugfs_default_scale);
 
 		sde_debugfs_setup_regset32(&psde->debugfs_csc,
 				sblk->csc_blk.base + cfg->base,