Merge tag 'drm-misc-next-2021-04-09' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for 5.13:

UAPI Changes:

Cross-subsystem Changes:

Core Changes:
  - bridge: Fix Kconfig dependency
  - cmdline: Refuse zero width/height mode
  - ttm: Ignore signaled move fences, ioremap buffer according to mem
         caching settins

Driver Changes:
  - Conversions to sysfs_emit
  - tegra: Don't register DP AUX channels before connectors
  - zynqmp: Fix for an out-of-bound (but within struct padding) memset

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20210409090020.jroa2d4p4qansrpa@gilmour

Author: airlied

drivers/dma-buf/dma-fence.c

@@ -123,7 +123,9 @@ static const struct dma_fence_ops dma_fence_stub_ops = {
 /**
  * dma_fence_get_stub - return a signaled fence
  *
- * Return a stub fence which is already signaled.
+ * Return a stub fence which is already signaled. The fence's
+ * timestamp corresponds to the first time after boot this
+ * function is called.
  */
 struct dma_fence *dma_fence_get_stub(void)
 {
@@ -141,6 +143,29 @@ struct dma_fence *dma_fence_get_stub(void)
 }
 EXPORT_SYMBOL(dma_fence_get_stub);
 
+/**
+ * dma_fence_allocate_private_stub - return a private, signaled fence
+ *
+ * Return a newly allocated and signaled stub fence.
+ */
+struct dma_fence *dma_fence_allocate_private_stub(void)
+{
+	struct dma_fence *fence;
+
+	fence = kzalloc(sizeof(*fence), GFP_KERNEL);
+	if (fence == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	dma_fence_init(fence,
+		       &dma_fence_stub_ops,
+		       &dma_fence_stub_lock,
+		       0, 0);
+	dma_fence_signal(fence);
+
+	return fence;
+}
+EXPORT_SYMBOL(dma_fence_allocate_private_stub);
+
 /**
  * dma_fence_context_alloc - allocate an array of fence contexts
  * @num: amount of contexts to allocate

drivers/gpu/drm/arm/display/include/malidp_utils.h

@@ -13,9 +13,6 @@
 #define has_bit(nr, mask)	(BIT(nr) & (mask))
 #define has_bits(bits, mask)	(((bits) & (mask)) == (bits))
 
-#define dp_for_each_set_bit(bit, mask) \
-	for_each_set_bit((bit), ((unsigned long *)&(mask)), sizeof(mask) * 8)
-
 #define dp_wait_cond(__cond, __tries, __min_range, __max_range)	\
 ({							\
 	int num_tries = __tries;			\

drivers/gpu/drm/arm/display/komeda/komeda_dev.c

@@ -62,7 +62,7 @@ core_id_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct komeda_dev *mdev = dev_to_mdev(dev);
 
-	return snprintf(buf, PAGE_SIZE, "0x%08x\n", mdev->chip.core_id);
+	return sysfs_emit(buf, "0x%08x\n", mdev->chip.core_id);
 }
 static DEVICE_ATTR_RO(core_id);
 
@@ -85,7 +85,7 @@ config_id_show(struct device *dev, struct device_attribute *attr, char *buf)
 		if (pipe->layers[i]->layer_type == KOMEDA_FMT_RICH_LAYER)
 			config_id.n_richs++;
 	}
-	return snprintf(buf, PAGE_SIZE, "0x%08x\n", config_id.value);
+	return sysfs_emit(buf, "0x%08x\n", config_id.value);
 }
 static DEVICE_ATTR_RO(config_id);
 
@@ -94,7 +94,7 @@ aclk_hz_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct komeda_dev *mdev = dev_to_mdev(dev);
 
-	return snprintf(buf, PAGE_SIZE, "%lu\n", clk_get_rate(mdev->aclk));
+	return sysfs_emit(buf, "%lu\n", clk_get_rate(mdev->aclk));
 }
 static DEVICE_ATTR_RO(aclk_hz);
 

drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c

@@ -46,8 +46,9 @@ void komeda_pipeline_destroy(struct komeda_dev *mdev,
 {
 	struct komeda_component *c;
 	int i;
+	unsigned long avail_comps = pipe->avail_comps;
 
-	dp_for_each_set_bit(i, pipe->avail_comps) {
+	for_each_set_bit(i, &avail_comps, 32) {
 		c = komeda_pipeline_get_component(pipe, i);
 		komeda_component_destroy(mdev, c);
 	}
@@ -247,6 +248,7 @@ static void komeda_pipeline_dump(struct komeda_pipeline *pipe)
 {
 	struct komeda_component *c;
 	int id;
+	unsigned long avail_comps = pipe->avail_comps;
 
 	DRM_INFO("Pipeline-%d: n_layers: %d, n_scalers: %d, output: %s.\n",
 		 pipe->id, pipe->n_layers, pipe->n_scalers,
@@ -258,7 +260,7 @@ static void komeda_pipeline_dump(struct komeda_pipeline *pipe)
 		 pipe->of_output_links[1] ?
 		 pipe->of_output_links[1]->full_name : "none");
 
-	dp_for_each_set_bit(id, pipe->avail_comps) {
+	for_each_set_bit(id, &avail_comps, 32) {
 		c = komeda_pipeline_get_component(pipe, id);
 
 		komeda_component_dump(c);
@@ -270,8 +272,9 @@ static void komeda_component_verify_inputs(struct komeda_component *c)
 	struct komeda_pipeline *pipe = c->pipeline;
 	struct komeda_component *input;
 	int id;
+	unsigned long supported_inputs = c->supported_inputs;
 
-	dp_for_each_set_bit(id, c->supported_inputs) {
+	for_each_set_bit(id, &supported_inputs, 32) {
 		input = komeda_pipeline_get_component(pipe, id);
 		if (!input) {
 			c->supported_inputs &= ~(BIT(id));
@@ -302,8 +305,9 @@ static void komeda_pipeline_assemble(struct komeda_pipeline *pipe)
 	struct komeda_component *c;
 	struct komeda_layer *layer;
 	int i, id;
+	unsigned long avail_comps = pipe->avail_comps;
 
-	dp_for_each_set_bit(id, pipe->avail_comps) {
+	for_each_set_bit(id, &avail_comps, 32) {
 		c = komeda_pipeline_get_component(pipe, id);
 		komeda_component_verify_inputs(c);
 	}
@@ -355,13 +359,15 @@ void komeda_pipeline_dump_register(struct komeda_pipeline *pipe,
 {
 	struct komeda_component *c;
 	u32 id;
+	unsigned long avail_comps;
 
 	seq_printf(sf, "\n======== Pipeline-%d ==========\n", pipe->id);
 
 	if (pipe->funcs && pipe->funcs->dump_register)
 		pipe->funcs->dump_register(pipe, sf);
 
-	dp_for_each_set_bit(id, pipe->avail_comps) {
+	avail_comps = pipe->avail_comps;
+	for_each_set_bit(id, &avail_comps, 32) {
 		c = komeda_pipeline_get_component(pipe, id);
 
 		seq_printf(sf, "\n------%s------\n", c->name);

drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c

@@ -1231,14 +1231,15 @@ komeda_pipeline_unbound_components(struct komeda_pipeline *pipe,
 	struct komeda_pipeline_state *old = priv_to_pipe_st(pipe->obj.state);
 	struct komeda_component_state *c_st;
 	struct komeda_component *c;
-	u32 disabling_comps, id;
+	u32 id;
+	unsigned long disabling_comps;
 
 	WARN_ON(!old);
 
 	disabling_comps = (~new->active_comps) & old->active_comps;
 
 	/* unbound all disabling component */
-	dp_for_each_set_bit(id, disabling_comps) {
+	for_each_set_bit(id, &disabling_comps, 32) {
 		c = komeda_pipeline_get_component(pipe, id);
 		c_st = komeda_component_get_state_and_set_user(c,
 				drm_st, NULL, new->crtc);
@@ -1286,7 +1287,8 @@ bool komeda_pipeline_disable(struct komeda_pipeline *pipe,
 	struct komeda_pipeline_state *old;
 	struct komeda_component *c;
 	struct komeda_component_state *c_st;
-	u32 id, disabling_comps = 0;
+	u32 id;
+	unsigned long disabling_comps;
 
 	old = komeda_pipeline_get_old_state(pipe, old_state);
 
@@ -1296,10 +1298,10 @@ bool komeda_pipeline_disable(struct komeda_pipeline *pipe,
 		disabling_comps = old->active_comps &
 				  pipe->standalone_disabled_comps;
 
-	DRM_DEBUG_ATOMIC("PIPE%d: active_comps: 0x%x, disabling_comps: 0x%x.\n",
+	DRM_DEBUG_ATOMIC("PIPE%d: active_comps: 0x%x, disabling_comps: 0x%lx.\n",
 			 pipe->id, old->active_comps, disabling_comps);
 
-	dp_for_each_set_bit(id, disabling_comps) {
+	for_each_set_bit(id, &disabling_comps, 32) {
 		c = komeda_pipeline_get_component(pipe, id);
 		c_st = priv_to_comp_st(c->obj.state);
 
@@ -1330,16 +1332,17 @@ void komeda_pipeline_update(struct komeda_pipeline *pipe,
 	struct komeda_pipeline_state *new = priv_to_pipe_st(pipe->obj.state);
 	struct komeda_pipeline_state *old;
 	struct komeda_component *c;
-	u32 id, changed_comps = 0;
+	u32 id;
+	unsigned long changed_comps;
 
 	old = komeda_pipeline_get_old_state(pipe, old_state);
 
 	changed_comps = new->active_comps | old->active_comps;
 
-	DRM_DEBUG_ATOMIC("PIPE%d: active_comps: 0x%x, changed: 0x%x.\n",
+	DRM_DEBUG_ATOMIC("PIPE%d: active_comps: 0x%x, changed: 0x%lx.\n",
 			 pipe->id, new->active_comps, changed_comps);
 
-	dp_for_each_set_bit(id, changed_comps) {
+	for_each_set_bit(id, &changed_comps, 32) {
 		c = komeda_pipeline_get_component(pipe, id);
 
 		if (new->active_comps & BIT(c->id))

drivers/gpu/drm/bridge/Kconfig

@@ -55,7 +55,7 @@ config DRM_DISPLAY_CONNECTOR
 	depends on OF
 	help
 	  Driver for display connectors with support for DDC and hot-plug
-	  detection. Most display controller handle display connectors
+	  detection. Most display controllers handle display connectors
 	  internally and don't need this driver, but the DRM subsystem is
 	  moving towards separating connector handling from display controllers
 	  on ARM-based platforms. Saying Y here when this driver is not needed
@@ -210,6 +210,7 @@ config DRM_TOSHIBA_TC358762
 	tristate "TC358762 DSI/DPI bridge"
 	depends on OF
 	select DRM_MIPI_DSI
+	select DRM_KMS_HELPER
 	select DRM_PANEL_BRIDGE
 	help
 	  Toshiba TC358762 DSI/DPI bridge driver.

drivers/gpu/drm/bridge/lontium-lt8912b.c

@@ -5,6 +5,7 @@
 
 #include <linux/device.h>
 #include <linux/delay.h>
+#include <linux/gpio/consumer.h>
 #include <linux/i2c.h>
 #include <linux/gpio.h>
 #include <linux/of_gpio.h>

drivers/gpu/drm/drm_dp_mst_topology.c

@@ -4109,10 +4109,9 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr)
 		return 0;
 
 	up_req = kzalloc(sizeof(*up_req), GFP_KERNEL);
-	if (!up_req) {
-		DRM_ERROR("Not enough memory to process MST up req\n");
+	if (!up_req)
 		return -ENOMEM;
-	}
+
 	INIT_LIST_HEAD(&up_req->next);
 
 	drm_dp_sideband_parse_req(&mgr->up_req_recv, &up_req->msg);

drivers/gpu/drm/drm_internal.h

@@ -170,7 +170,6 @@ void drm_sysfs_connector_remove(struct drm_connector *connector);
 void drm_sysfs_lease_event(struct drm_device *dev);
 
 /* drm_gem.c */
-struct drm_gem_object;
 int drm_gem_init(struct drm_device *dev);
 int drm_gem_handle_create_tail(struct drm_file *file_priv,
 			       struct drm_gem_object *obj,

drivers/gpu/drm/drm_modes.c

@@ -1864,6 +1864,9 @@ drm_mode_create_from_cmdline_mode(struct drm_device *dev,
 {
 	struct drm_display_mode *mode;
 
+	if (cmd->xres == 0 || cmd->yres == 0)
+		return NULL;
+
 	if (cmd->cvt)
 		mode = drm_cvt_mode(dev,
 				    cmd->xres, cmd->yres,