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[v2,03/35] video: Add a function to obtain the framebuffer address

Message ID 20240821161927.695717-4-sjg@chromium.org
State Accepted
Delegated to: Tom Rini
Headers show
Series global_data: Reduce size of struct global_data | expand

Commit Message

Simon Glass Aug. 21, 2024, 4:18 p.m. UTC 
Add a new function which returns the framebuffer address of the first
video device. This will allow the global_data field top be dropped.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

(no changes since v1)

 drivers/video/video-uclass.c | 14 ++++++++++++++
 include/video.h              | 11 +++++++++++
 2 files changed, 25 insertions(+)
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Patch

diff --git a/drivers/video/video-uclass.c b/drivers/video/video-uclass.c
index a5aa8dd5295..e358a7949e0 100644
--- a/drivers/video/video-uclass.c
+++ b/drivers/video/video-uclass.c
@@ -152,6 +152,20 @@  int video_reserve(ulong *addrp)
 	return 0;
 }
 
+ulong video_get_fb(void)
+{
+	struct udevice *dev;
+
+	uclass_find_first_device(UCLASS_VIDEO, &dev);
+	if (dev) {
+		const struct video_uc_plat *uc_plat = dev_get_uclass_plat(dev);
+
+		return uc_plat->base;
+	}
+
+	return 0;
+}
+
 int video_fill_part(struct udevice *dev, int xstart, int ystart, int xend,
 		    int yend, u32 colour)
 {
diff --git a/include/video.h b/include/video.h
index 4013a949983..606c8a37fb8 100644
--- a/include/video.h
+++ b/include/video.h
@@ -420,4 +420,15 @@  int bmp_info(ulong addr);
  */
 int video_reserve_from_bloblist(struct video_handoff *ho);
 
+/**
+ * video_get_fb() - Get the first framebuffer address
+ *
+ * This function does not probe video devices, so can only be used after a video
+ * device has been activated.
+ *
+ * Return: address of the framebuffer of the first video device found, or 0 if
+ * there is no device
+ */
+ulong video_get_fb(void);
+
 #endif