[PATCH v2 4/6] video: Skip framebuffer reservation if already reserved

[Devarsh Thakkar]

Skip framebufer reservation if it was already reserved
from previous stage and whose information was passed
using a bloblist.

Signed-off-by: Devarsh Thakkar <devar...@ti.com>
Reviewed-by: Simon Glass <s...@chromium.org>
---
V2:
- Add debug prints
- Fix commenting style
V3:
- Fix commenting style
---
 drivers/video/video-uclass.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/video/video-uclass.c b/drivers/video/video-uclass.c
index f743ed74c8..f619b5ae56 100644
--- a/drivers/video/video-uclass.c
+++ b/drivers/video/video-uclass.c
@@ -123,6 +123,19 @@ int video_reserve(ulong *addrp)
        struct udevice *dev;
        ulong size;
 
+       if (IS_ENABLED(CONFIG_SPL_VIDEO_HANDOFF) && spl_phase() > PHASE_SPL) {
+               /*
+                * Skip allocation if already received a bloblist which
+                * filled below fields
+                */
+               if (gd->fb_base && gd->video_top && gd->video_bottom) {
+                       debug("Found pre-reserved video memory from %lx to 
%lx\n",
+                             gd->video_bottom, gd->video_top);
+                       debug("Skipping video frame buffer allocation\n");
+                       return 0;
+               }
+       }
+
        gd->video_top = *addrp;
        for (uclass_find_first_device(UCLASS_VIDEO, &dev);
             dev;
-- 
2.34.1