Hi Am 13.09.22 um 17:15 schrieb Wang Yugui: [...]
so I tried to revert patch of mgag200 driver in batch of 2 or 3, the I noticed the patch 'Subject: drm/mgag200: Remove special case for G200SE with <2 MiB' and then tried this dirty fix.Oh, great work! Thank you. From looking at the screenshot that you provided, it seems as if the 24-bit mode setting is broken. I'm not sure why the G200SE workaround applies to a G200ER, but we'll see.I tested 'preferred_depth = 32' too. it works on T630 too. so both 16 and 32 work, but 24 failed on DELL/T630.
I tried on my test machine with a 5.19 kernel and found that 32-bit and 24-bit pixels work, but 16-bit looks incorrect.
What are the results if you boot your kernel 5.19.3 with the parameter video=1024x768-24? This should enable 24-bit pixels.
How does video=1024x768-16 look with the 5.19 kernel? Best regards Thomas
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c
b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 225cca2ed60e..563e3ab05fbc 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -1070,7 +1070,7 @@ int mgag200_modeset_init(struct mga_device *mdev, resource_size_t vram_available
dev->mode_config.max_width = MGAG200_MAX_FB_WIDTH;
dev->mode_config.max_height = MGAG200_MAX_FB_HEIGHT;
- dev->mode_config.preferred_depth = 24;
+ dev->mode_config.preferred_depth = 32;
dev->mode_config.fb_base = mdev->vram_res->start;
dev->mode_config.funcs = &mgag200_mode_config_funcs;
Best Regards
Wang Yugui (wangyugui@xxxxxxxxxxxx)
2022/09/13
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Ivo Totev
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