5 files changed, 64 insertions, 12 deletions

diff --git a/drivers/media/v4l2-core/v4l2-cci.c b/drivers/media/v4l2-core/v4l2-cci.c
index 1ff94affbaf3..e9ecf4785946 100644
--- a/drivers/media/v4l2-core/v4l2-cci.c
+++ b/drivers/media/v4l2-core/v4l2-cci.c
@@ -12,7 +12,7 @@
 #include <linux/regmap.h>
 #include <linux/types.h>
 
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
 
 #include <media/v4l2-cci.h>
 
diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c
index be2ba7ca5de2..3d7711cc42bc 100644
--- a/drivers/media/v4l2-core/v4l2-dev.c
+++ b/drivers/media/v4l2-core/v4l2-dev.c
@@ -483,7 +483,6 @@ static const struct file_operations v4l2_fops = {
 #endif
 	.release = v4l2_release,
 	.poll = v4l2_poll,
-	.llseek = no_llseek,
 };
 
 /**
@@ -557,6 +556,7 @@ static void determine_valid_ioctls(struct video_device *vdev)
 	bool is_tx = vdev->vfl_dir != VFL_DIR_RX;
 	bool is_io_mc = vdev->device_caps & V4L2_CAP_IO_MC;
 	bool has_streaming = vdev->device_caps & V4L2_CAP_STREAMING;
+	bool is_edid =  vdev->device_caps & V4L2_CAP_EDID;
 
 	bitmap_zero(valid_ioctls, BASE_VIDIOC_PRIVATE);
 
@@ -784,6 +784,20 @@ static void determine_valid_ioctls(struct video_device *vdev)
 		SET_VALID_IOCTL(ops, VIDIOC_S_TUNER, vidioc_s_tuner);
 		SET_VALID_IOCTL(ops, VIDIOC_S_HW_FREQ_SEEK, vidioc_s_hw_freq_seek);
 	}
+	if (is_edid) {
+		SET_VALID_IOCTL(ops, VIDIOC_G_EDID, vidioc_g_edid);
+		if (is_tx) {
+			SET_VALID_IOCTL(ops, VIDIOC_G_OUTPUT, vidioc_g_output);
+			SET_VALID_IOCTL(ops, VIDIOC_S_OUTPUT, vidioc_s_output);
+			SET_VALID_IOCTL(ops, VIDIOC_ENUMOUTPUT, vidioc_enum_output);
+		}
+		if (is_rx) {
+			SET_VALID_IOCTL(ops, VIDIOC_ENUMINPUT, vidioc_enum_input);
+			SET_VALID_IOCTL(ops, VIDIOC_G_INPUT, vidioc_g_input);
+			SET_VALID_IOCTL(ops, VIDIOC_S_INPUT, vidioc_s_input);
+			SET_VALID_IOCTL(ops, VIDIOC_S_EDID, vidioc_s_edid);
+		}
+	}
 
 	bitmap_andnot(vdev->valid_ioctls, valid_ioctls, vdev->valid_ioctls,
 			BASE_VIDIOC_PRIVATE);
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 5eb4d797d259..e14db67be97c 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -484,7 +484,7 @@ static void v4l_print_create_buffers(const void *arg, bool write_only)
 {
 	const struct v4l2_create_buffers *p = arg;
 
-	pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, max num buffers=%u",
+	pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, max num buffers=%u, ",
 		p->index, p->count, prt_names(p->memory, v4l2_memory_names),
 		p->capabilities, p->max_num_buffers);
 	v4l_print_format(&p->format, write_only);
@@ -1458,6 +1458,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
 	case V4L2_META_FMT_VIVID:       descr = "Vivid Metadata"; break;
 	case V4L2_META_FMT_RK_ISP1_PARAMS:	descr = "Rockchip ISP1 3A Parameters"; break;
 	case V4L2_META_FMT_RK_ISP1_STAT_3A:	descr = "Rockchip ISP1 3A Statistics"; break;
+	case V4L2_META_FMT_RK_ISP1_EXT_PARAMS:	descr = "Rockchip ISP1 Ext 3A Params"; break;
 	case V4L2_PIX_FMT_NV12_8L128:	descr = "NV12 (8x128 Linear)"; break;
 	case V4L2_PIX_FMT_NV12M_8L128:	descr = "NV12M (8x128 Linear)"; break;
 	case V4L2_PIX_FMT_NV12_10BE_8L128:	descr = "10-bit NV12 (8x128 Linear, BE)"; break;
diff --git a/drivers/media/v4l2-core/v4l2-jpeg.c b/drivers/media/v4l2-core/v4l2-jpeg.c
index b8bece739d07..6e2647323522 100644
--- a/drivers/media/v4l2-core/v4l2-jpeg.c
+++ b/drivers/media/v4l2-core/v4l2-jpeg.c
@@ -9,7 +9,7 @@
  * [1] https://www.w3.org/Graphics/JPEG/itu-t81.pdf
  */
 
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 7c5812d55315..3a4ba08810d2 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -1443,16 +1443,53 @@ int v4l2_subdev_link_validate(struct media_link *link)
 	bool states_locked;
 	int ret;
 
-	if (!is_media_entity_v4l2_subdev(link->sink->entity) ||
-	    !is_media_entity_v4l2_subdev(link->source->entity)) {
-		pr_warn_once("%s of link '%s':%u->'%s':%u is not a V4L2 sub-device, driver bug!\n",
-			     !is_media_entity_v4l2_subdev(link->sink->entity) ?
-			     "sink" : "source",
-			     link->source->entity->name, link->source->index,
-			     link->sink->entity->name, link->sink->index);
-		return 0;
+	/*
+	 * Links are validated in the context of the sink entity. Usage of this
+	 * helper on a sink that is not a subdev is a clear driver bug.
+	 */
+	if (WARN_ON_ONCE(!is_media_entity_v4l2_subdev(link->sink->entity)))
+		return -EINVAL;
+
+	/*
+	 * If the source is a video device, delegate link validation to it. This
+	 * allows usage of this helper for subdev connected to a video output
+	 * device, provided that the driver implement the video output device's
+	 * .link_validate() operation.
+	 */
+	if (is_media_entity_v4l2_video_device(link->source->entity)) {
+		struct media_entity *source = link->source->entity;
+
+		if (!source->ops || !source->ops->link_validate) {
+			/*
+			 * Many existing drivers do not implement the required
+			 * .link_validate() operation for their video devices.
+			 * Print a warning to get the drivers fixed, and return
+			 * 0 to avoid breaking userspace. This should
+			 * eventually be turned into a WARN_ON() when all
+			 * drivers will have been fixed.
+			 */
+			pr_warn_once("video device '%s' does not implement .link_validate(), driver bug!\n",
+				     source->name);
+			return 0;
+		}
+
+		/*
+		 * Avoid infinite loops in case a video device incorrectly uses
+		 * this helper function as its .link_validate() handler.
+		 */
+		if (WARN_ON(source->ops->link_validate == v4l2_subdev_link_validate))
+			return -EINVAL;
+
+		return source->ops->link_validate(link);
 	}
 
+	/*
+	 * If the source is still not a subdev, usage of this helper is a clear
+	 * driver bug.
+	 */
+	if (WARN_ON(!is_media_entity_v4l2_subdev(link->source->entity)))
+		return -EINVAL;
+
 	sink_sd = media_entity_to_v4l2_subdev(link->sink->entity);
 	source_sd = media_entity_to_v4l2_subdev(link->source->entity);