From: Takashi Iwai Date: Fri, 25 Jan 2013 17:08:03 +0100 Subject: [PATCH] drm/cirrus: Use 16bpp as default Patch-mainline: Submitted References: bnc#799216 We've got a bug report that GNOME on QEMU shows wrong colors. It turned out that it's because Cairo doesn't support 24bpp well. This hasn't been an issue until now because we (at least SUSE and Fedora) have a patch to use 16bpp for QEMU in Xorg cirrus UMS driver. Since cirrus KMS driver is mainly targeted for the use on QEMU/KVM, we should choose 16bpp as default, too. Also, it's not convenient to set the default bpp in multiple places. cirrus_fbdev_init() should check the original preferred depth set in cirrus_modeset_init(). Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=799216 Signed-off-by: Takashi Iwai --- drivers/gpu/drm/cirrus/cirrus_fbdev.c | 2 +- drivers/gpu/drm/cirrus/cirrus_mode.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/cirrus/cirrus_fbdev.c +++ b/drivers/gpu/drm/cirrus/cirrus_fbdev.c @@ -273,7 +273,7 @@ int cirrus_fbdev_init(struct cirrus_devi { struct cirrus_fbdev *gfbdev; int ret; - int bpp_sel = 24; + int bpp_sel = cdev->dev->mode_config.preferred_depth; /*bpp_sel = 8;*/ gfbdev = kzalloc(sizeof(struct cirrus_fbdev), GFP_KERNEL); --- a/drivers/gpu/drm/cirrus/cirrus_mode.c +++ b/drivers/gpu/drm/cirrus/cirrus_mode.c @@ -588,7 +588,7 @@ int cirrus_modeset_init(struct cirrus_de cdev->dev->mode_config.max_height = CIRRUS_MAX_FB_HEIGHT; cdev->dev->mode_config.fb_base = cdev->mc.vram_base; - cdev->dev->mode_config.preferred_depth = 24; + cdev->dev->mode_config.preferred_depth = 16; /* don't prefer a shadow on virt GPU */ cdev->dev->mode_config.prefer_shadow = 0;