Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm gixes from Dave Airlie:
 - exynos: infinite loop regressions fixed
 - i915: one regression
 - radeon: one race condition on monitor probing
 - noveau: two regressions
 - tegra: one vblank regression fix

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/tegra: dc: Add missing call to drm_vblank_on()
  drm/nouveau/nv50/disp: Fix modeset on G94
  drm/gk20a/fb: fix setting of large page size bit
  drm/radeon: add locking around atombios scratch space usage
  drm/i915: Fix obj->map_and_fenceable across tiling changes
  drm/exynos: fix possible infinite loop issue
  drm/exynos: g2d: fix null pointer dereference
  drm/exynos: resolve infinite loop issue on non multi-platform
  drm/exynos: resolve infinite loop issue on multi-platform

11 files changed, 103 insertions, 46 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index c57466edf45b..e5c4c6c8c967 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -495,6 +495,12 @@ static struct component_match *exynos_drm_match_add(struct device *dev)
 
 	mutex_lock(&drm_component_lock);
 
+	/* Do not retry to probe if there is no any kms driver regitered. */
+	if (list_empty(&drm_component_list)) {
+		mutex_unlock(&drm_component_lock);
+		return ERR_PTR(-ENODEV);
+	}
+
 	list_for_each_entry(cdev, &drm_component_list, list) {
 		/*
 		 * Add components to master only in case that crtc and
@@ -585,10 +591,21 @@ static int exynos_drm_platform_probe(struct platform_device *pdev)
 		goto err_unregister_mixer_drv;
 #endif
 
+	match = exynos_drm_match_add(&pdev->dev);
+	if (IS_ERR(match)) {
+		ret = PTR_ERR(match);
+		goto err_unregister_hdmi_drv;
+	}
+
+	ret = component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
+						match);
+	if (ret < 0)
+		goto err_unregister_hdmi_drv;
+
 #ifdef CONFIG_DRM_EXYNOS_G2D
 	ret = platform_driver_register(&g2d_driver);
 	if (ret < 0)
-		goto err_unregister_hdmi_drv;
+		goto err_del_component_master;
 #endif
 
 #ifdef CONFIG_DRM_EXYNOS_FIMC
@@ -619,23 +636,9 @@ static int exynos_drm_platform_probe(struct platform_device *pdev)
 		goto err_unregister_ipp_drv;
 #endif
 
-	match = exynos_drm_match_add(&pdev->dev);
-	if (IS_ERR(match)) {
-		ret = PTR_ERR(match);
-		goto err_unregister_resources;
-	}
-
-	ret = component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
-						match);
-	if (ret < 0)
-		goto err_unregister_resources;
-
 	return ret;
 
-err_unregister_resources:
-
 #ifdef CONFIG_DRM_EXYNOS_IPP
-	exynos_platform_device_ipp_unregister();
 err_unregister_ipp_drv:
 	platform_driver_unregister(&ipp_driver);
 err_unregister_gsc_drv:
@@ -658,9 +661,11 @@ err_unregister_g2d_drv:
 
 #ifdef CONFIG_DRM_EXYNOS_G2D
 	platform_driver_unregister(&g2d_driver);
-err_unregister_hdmi_drv:
+err_del_component_master:
 #endif
+	component_master_del(&pdev->dev, &exynos_drm_ops);
 
+err_unregister_hdmi_drv:
 #ifdef CONFIG_DRM_EXYNOS_HDMI
 	platform_driver_unregister(&hdmi_driver);
 err_unregister_mixer_drv:
@@ -741,6 +746,18 @@ static int exynos_drm_init(void)
 {
 	int ret;
 
+	/*
+	 * Register device object only in case of Exynos SoC.
+	 *
+	 * Below codes resolves temporarily infinite loop issue incurred
+	 * by Exynos drm driver when using multi-platform kernel.
+	 * So these codes will be replaced with more generic way later.
+	 */
+	if (!of_machine_is_compatible("samsung,exynos3") &&
+			!of_machine_is_compatible("samsung,exynos4") &&
+			!of_machine_is_compatible("samsung,exynos5"))
+		return -ENODEV;
+
 	exynos_drm_pdev = platform_device_register_simple("exynos-drm", -1,
 								NULL, 0);
 	if (IS_ERR(exynos_drm_pdev))
diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
index df7a77d3eff8..6ff8599f6cbf 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_g2d.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
@@ -302,9 +302,12 @@ static void g2d_fini_cmdlist(struct g2d_data *g2d)
 	struct exynos_drm_subdrv *subdrv = &g2d->subdrv;
 
 	kfree(g2d->cmdlist_node);
-	dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
-			g2d->cmdlist_pool_virt,
-			g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
+
+	if (g2d->cmdlist_pool_virt && g2d->cmdlist_pool) {
+		dma_free_attrs(subdrv->drm_dev->dev, G2D_CMDLIST_POOL_SIZE,
+				g2d->cmdlist_pool_virt,
+				g2d->cmdlist_pool, &g2d->cmdlist_dma_attrs);
+	}
 }
 
 static struct g2d_cmdlist_node *g2d_get_cmdlist(struct g2d_data *g2d)
diff --git a/drivers/gpu/drm/i915/i915_gem_tiling.c b/drivers/gpu/drm/i915/i915_gem_tiling.c
index 2cefb597df6d..2b1eaa29ada4 100644
--- a/drivers/gpu/drm/i915/i915_gem_tiling.c
+++ b/drivers/gpu/drm/i915/i915_gem_tiling.c
@@ -364,22 +364,9 @@ i915_gem_set_tiling(struct drm_device *dev, void *data,
 		 * has to also include the unfenced register the GPU uses
 		 * whilst executing a fenced command for an untiled object.
 		 */
-
-		obj->map_and_fenceable =
-			!i915_gem_obj_ggtt_bound(obj) ||
-			(i915_gem_obj_ggtt_offset(obj) +
-			 obj->base.size <= dev_priv->gtt.mappable_end &&
-			 i915_gem_object_fence_ok(obj, args->tiling_mode));
-
-		/* Rebind if we need a change of alignment */
-		if (!obj->map_and_fenceable) {
-			u32 unfenced_align =
-				i915_gem_get_gtt_alignment(dev, obj->base.size,
-							    args->tiling_mode,
-							    false);
-			if (i915_gem_obj_ggtt_offset(obj) & (unfenced_align - 1))
-				ret = i915_gem_object_ggtt_unbind(obj);
-		}
+		if (obj->map_and_fenceable &&
+		    !i915_gem_object_fence_ok(obj, args->tiling_mode))
+			ret = i915_gem_object_ggtt_unbind(obj);
 
 		if (ret == 0) {
 			obj->fence_dirty =
diff --git a/drivers/gpu/drm/nouveau/core/subdev/fb/gk20a.c b/drivers/gpu/drm/nouveau/core/subdev/fb/gk20a.c
index a16024a74771..fde42e4d1b56 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/fb/gk20a.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/fb/gk20a.c
@@ -27,6 +27,20 @@ struct gk20a_fb_priv {
 };
 
 static int
+gk20a_fb_init(struct nouveau_object *object)
+{
+	struct gk20a_fb_priv *priv = (void *)object;
+	int ret;
+
+	ret = nouveau_fb_init(&priv->base);
+	if (ret)
+		return ret;
+
+	nv_mask(priv, 0x100c80, 0x00000001, 0x00000000); /* 128KiB lpg */
+	return 0;
+}
+
+static int
 gk20a_fb_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	     struct nouveau_oclass *oclass, void *data, u32 size,
 	     struct nouveau_object **pobject)
@@ -48,7 +62,7 @@ gk20a_fb_oclass = &(struct nouveau_fb_impl) {
 	.base.ofuncs = &(struct nouveau_ofuncs) {
 		.ctor = gk20a_fb_ctor,
 		.dtor = _nouveau_fb_dtor,
-		.init = _nouveau_fb_init,
+		.init = gk20a_fb_init,
 		.fini = _nouveau_fb_fini,
 	},
 	.memtype = nvc0_fb_memtype_valid,
diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c
index ae873d1a8d46..eb8b36714fa1 100644
--- a/drivers/gpu/drm/nouveau/nv50_display.c
+++ b/drivers/gpu/drm/nouveau/nv50_display.c
@@ -791,6 +791,22 @@ nv50_crtc_set_scale(struct nouveau_crtc *nv_crtc, bool update)
 }
 
 static int
+nv50_crtc_set_raster_vblank_dmi(struct nouveau_crtc *nv_crtc, u32 usec)
+{
+	struct nv50_mast *mast = nv50_mast(nv_crtc->base.dev);
+	u32 *push;
+
+	push = evo_wait(mast, 8);
+	if (!push)
+		return -ENOMEM;
+
+	evo_mthd(push, 0x0828 + (nv_crtc->index * 0x400), 1);
+	evo_data(push, usec);
+	evo_kick(push, mast);
+	return 0;
+}
+
+static int
 nv50_crtc_set_color_vibrance(struct nouveau_crtc *nv_crtc, bool update)
 {
 	struct nv50_mast *mast = nv50_mast(nv_crtc->base.dev);
@@ -1104,14 +1120,14 @@ nv50_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *umode,
 			evo_mthd(push, 0x0804 + (nv_crtc->index * 0x400), 2);
 			evo_data(push, 0x00800000 | mode->clock);
 			evo_data(push, (ilace == 2) ? 2 : 0);
-			evo_mthd(push, 0x0810 + (nv_crtc->index * 0x400), 8);
+			evo_mthd(push, 0x0810 + (nv_crtc->index * 0x400), 6);
 			evo_data(push, 0x00000000);
 			evo_data(push, (vactive << 16) | hactive);
 			evo_data(push, ( vsynce << 16) | hsynce);
 			evo_data(push, (vblanke << 16) | hblanke);
 			evo_data(push, (vblanks << 16) | hblanks);
 			evo_data(push, (vblan2e << 16) | vblan2s);
-			evo_data(push, vblankus);
+			evo_mthd(push, 0x082c + (nv_crtc->index * 0x400), 1);
 			evo_data(push, 0x00000000);
 			evo_mthd(push, 0x0900 + (nv_crtc->index * 0x400), 2);
 			evo_data(push, 0x00000311);
@@ -1141,6 +1157,11 @@ nv50_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *umode,
 	nv_connector = nouveau_crtc_connector_get(nv_crtc);
 	nv50_crtc_set_dither(nv_crtc, false);
 	nv50_crtc_set_scale(nv_crtc, false);
+
+	/* G94 only accepts this after setting scale */
+	if (nv50_vers(mast) < GF110_DISP_CORE_CHANNEL_DMA)
+		nv50_crtc_set_raster_vblank_dmi(nv_crtc, vblankus);
+
 	nv50_crtc_set_color_vibrance(nv_crtc, false);
 	nv50_crtc_set_image(nv_crtc, crtc->primary->fb, x, y, false);
 	return 0;
diff --git a/drivers/gpu/drm/radeon/atom.c b/drivers/gpu/drm/radeon/atom.c
index 15da7ef344a4..ec1593a6a561 100644
--- a/drivers/gpu/drm/radeon/atom.c
+++ b/drivers/gpu/drm/radeon/atom.c
@@ -1217,7 +1217,7 @@ free:
 	return ret;
 }
 
-int atom_execute_table(struct atom_context *ctx, int index, uint32_t * params)
+int atom_execute_table_scratch_unlocked(struct atom_context *ctx, int index, uint32_t * params)
 {
 	int r;
 
@@ -1238,6 +1238,15 @@ int atom_execute_table(struct atom_context *ctx, int index, uint32_t * params)
 	return r;
 }
 
+int atom_execute_table(struct atom_context *ctx, int index, uint32_t * params)
+{
+	int r;
+	mutex_lock(&ctx->scratch_mutex);
+	r = atom_execute_table_scratch_unlocked(ctx, index, params);
+	mutex_unlock(&ctx->scratch_mutex);
+	return r;
+}
+
 static int atom_iio_len[] = { 1, 2, 3, 3, 3, 3, 4, 4, 4, 3 };
 
 static void atom_index_iio(struct atom_context *ctx, int base)
diff --git a/drivers/gpu/drm/radeon/atom.h b/drivers/gpu/drm/radeon/atom.h
index feba6b8d36b3..6d014ddb6b78 100644
--- a/drivers/gpu/drm/radeon/atom.h
+++ b/drivers/gpu/drm/radeon/atom.h
@@ -125,6 +125,7 @@ struct card_info {
 struct atom_context {
 	struct card_info *card;
 	struct mutex mutex;
+	struct mutex scratch_mutex;
 	void *bios;
 	uint32_t cmd_table, data_table;
 	uint16_t *iio;
@@ -145,6 +146,7 @@ extern int atom_debug;
 
 struct atom_context *atom_parse(struct card_info *, void *);
 int atom_execute_table(struct atom_context *, int, uint32_t *);
+int atom_execute_table_scratch_unlocked(struct atom_context *, int, uint32_t *);
 int atom_asic_init(struct atom_context *);
 void atom_destroy(struct atom_context *);
 bool atom_parse_data_header(struct atom_context *ctx, int index, uint16_t *size,
diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c
index 95d5d4ab3335..11ba9d21b89b 100644
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -100,6 +100,7 @@ static int radeon_process_aux_ch(struct radeon_i2c_chan *chan,
 	memset(&args, 0, sizeof(args));
 
 	mutex_lock(&chan->mutex);
+	mutex_lock(&rdev->mode_info.atom_context->scratch_mutex);
 
 	base = (unsigned char *)(rdev->mode_info.atom_context->scratch + 1);
 
@@ -113,7 +114,7 @@ static int radeon_process_aux_ch(struct radeon_i2c_chan *chan,
 	if (ASIC_IS_DCE4(rdev))
 		args.v2.ucHPD_ID = chan->rec.hpd;
 
-	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
+	atom_execute_table_scratch_unlocked(rdev->mode_info.atom_context, index, (uint32_t *)&args);
 
 	*ack = args.v1.ucReplyStatus;
 
@@ -147,6 +148,7 @@ static int radeon_process_aux_ch(struct radeon_i2c_chan *chan,
 
 	r = recv_bytes;
 done:
+	mutex_unlock(&rdev->mode_info.atom_context->scratch_mutex);
 	mutex_unlock(&chan->mutex);
 
 	return r;
diff --git a/drivers/gpu/drm/radeon/atombios_i2c.c b/drivers/gpu/drm/radeon/atombios_i2c.c
index 9c570fb15b8c..4157780585a0 100644
--- a/drivers/gpu/drm/radeon/atombios_i2c.c
+++ b/drivers/gpu/drm/radeon/atombios_i2c.c
@@ -48,6 +48,7 @@ static int radeon_process_i2c_ch(struct radeon_i2c_chan *chan,
 	memset(&args, 0, sizeof(args));
 
 	mutex_lock(&chan->mutex);
+	mutex_lock(&rdev->mode_info.atom_context->scratch_mutex);
 
 	base = (unsigned char *)rdev->mode_info.atom_context->scratch;
 
@@ -82,7 +83,7 @@ static int radeon_process_i2c_ch(struct radeon_i2c_chan *chan,
 	args.ucSlaveAddr = slave_addr << 1;
 	args.ucLineNumber = chan->rec.i2c_id;
 
-	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
+	atom_execute_table_scratch_unlocked(rdev->mode_info.atom_context, index, (uint32_t *)&args);
 
 	/* error */
 	if (args.ucStatus != HW_ASSISTED_I2C_STATUS_SUCCESS) {
@@ -95,6 +96,7 @@ static int radeon_process_i2c_ch(struct radeon_i2c_chan *chan,
 		radeon_atom_copy_swap(buf, base, num, false);
 
 done:
+	mutex_unlock(&rdev->mode_info.atom_context->scratch_mutex);
 	mutex_unlock(&chan->mutex);
 
 	return r;
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index ea2676954dde..995a8b1770dd 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -952,6 +952,7 @@ int radeon_atombios_init(struct radeon_device *rdev)
 	}
 
 	mutex_init(&rdev->mode_info.atom_context->mutex);
+	mutex_init(&rdev->mode_info.atom_context->scratch_mutex);
 	radeon_atom_initialize_bios_scratch_regs(rdev->ddev);
 	atom_allocate_fb_scratch(rdev->mode_info.atom_context);
 	return 0;
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index 6553fd238685..054a79f143ae 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -736,7 +736,6 @@ static const struct drm_crtc_funcs tegra_crtc_funcs = {
 
 static void tegra_crtc_disable(struct drm_crtc *crtc)
 {
-	struct tegra_dc *dc = to_tegra_dc(crtc);
 	struct drm_device *drm = crtc->dev;
 	struct drm_plane *plane;
 
@@ -752,7 +751,7 @@ static void tegra_crtc_disable(struct drm_crtc *crtc)
 		}
 	}
 
-	drm_vblank_off(drm, dc->pipe);
+	drm_crtc_vblank_off(crtc);
 }
 
 static bool tegra_crtc_mode_fixup(struct drm_crtc *crtc,
@@ -841,8 +840,6 @@ static int tegra_crtc_mode_set(struct drm_crtc *crtc,
 	u32 value;
 	int err;
 
-	drm_vblank_pre_modeset(crtc->dev, dc->pipe);
-
 	err = tegra_crtc_setup_clk(crtc, mode);
 	if (err) {
 		dev_err(dc->dev, "failed to setup clock for CRTC: %d\n", err);
@@ -896,6 +893,8 @@ static void tegra_crtc_prepare(struct drm_crtc *crtc)
 	unsigned int syncpt;
 	unsigned long value;
 
+	drm_crtc_vblank_off(crtc);
+
 	/* hardware initialization */
 	reset_control_deassert(dc->rst);
 	usleep_range(10000, 20000);
@@ -943,7 +942,7 @@ static void tegra_crtc_commit(struct drm_crtc *crtc)
 	value = GENERAL_ACT_REQ | WIN_A_ACT_REQ;
 	tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
 
-	drm_vblank_post_modeset(crtc->dev, dc->pipe);
+	drm_crtc_vblank_on(crtc);
 }
 
 static void tegra_crtc_load_lut(struct drm_crtc *crtc)