Re: [PATCH] drm/fbdev-dma: Fix framebuffer mode for big endian devices

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Hi

Am 02.07.24 um 14:17 schrieb Thomas Huth:
The drm_mode_legacy_fb_format() function only generates formats suitable
for little endian devices. switch to drm_driver_legacy_fb_format() here
instead to take the device endianness into consideration, too.

Suggested-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Signed-off-by: Thomas Huth <thuth@xxxxxxxxxx>

Reviewed-by: Thomas Zimmermann <tzimmermann@xxxxxxx>

Thank you for taking the time to make the patch for fbdev-dma. I'll take care of merging both patches into the correct branches.

Best regards
Thomas

---
  Note: Patch has only been compile-tested since I lack an environment
        for testing it. But it's the same fix as I required for the
        drm_mode_legacy_fb_format() in drm_fbdev_generic.c / drm_fbdev_ttm.c
        so I think this should be fine.

  drivers/gpu/drm/drm_fbdev_dma.c | 3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_fbdev_dma.c b/drivers/gpu/drm/drm_fbdev_dma.c
index 97ef6300d47e..fdef4a2f883f 100644
--- a/drivers/gpu/drm/drm_fbdev_dma.c
+++ b/drivers/gpu/drm/drm_fbdev_dma.c
@@ -101,7 +101,8 @@ static int drm_fbdev_dma_helper_fb_probe(struct drm_fb_helper *fb_helper,
  		    sizes->surface_width, sizes->surface_height,
  		    sizes->surface_bpp);
- format = drm_mode_legacy_fb_format(sizes->surface_bpp, sizes->surface_depth);
+	format = drm_driver_legacy_fb_format(dev, sizes->surface_bpp,
+					     sizes->surface_depth);
  	buffer = drm_client_framebuffer_create(client, sizes->surface_width,
  					       sizes->surface_height, format);
  	if (IS_ERR(buffer))

--
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)




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