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authorDave Airlie <airlied@redhat.com>2014-01-21 01:47:46 -0500
committerDave Airlie <airlied@redhat.com>2014-01-23 11:01:35 +1000
commit918be888d613e58938338b4b0c895de97579173d (patch)
treed81c238aaf85a9100b7d64eed836fc684089bb3d /drivers/gpu
parentf5395ba35f2ae52eb5839f8046e4aeef6df7f357 (diff)
drm/mgag200: on cards with < 2MB VRAM default to 16-bit
This aligns with what the userspace -mga driver does in the same situation. Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/mgag200/mgag200_fb.c7
-rw-r--r--drivers/gpu/drm/mgag200/mgag200_main.c5
2 files changed, 10 insertions, 2 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_fb.c b/drivers/gpu/drm/mgag200/mgag200_fb.c
index 964f58cee5ea..005b60aa2a00 100644
--- a/drivers/gpu/drm/mgag200/mgag200_fb.c
+++ b/drivers/gpu/drm/mgag200/mgag200_fb.c
@@ -282,6 +282,11 @@ int mgag200_fbdev_init(struct mga_device *mdev)
{
struct mga_fbdev *mfbdev;
int ret;
+ int bpp_sel = 32;
+
+ /* prefer 16bpp on low end gpus with limited VRAM */
+ if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024))
+ bpp_sel = 16;
mfbdev = devm_kzalloc(mdev->dev->dev, sizeof(struct mga_fbdev), GFP_KERNEL);
if (!mfbdev)
@@ -301,7 +306,7 @@ int mgag200_fbdev_init(struct mga_device *mdev)
/* disable all the possible outputs/crtcs before entering KMS mode */
drm_helper_disable_unused_functions(mdev->dev);
- drm_fb_helper_initial_config(&mfbdev->helper, 32);
+ drm_fb_helper_initial_config(&mfbdev->helper, bpp_sel);
return 0;
}
diff --git a/drivers/gpu/drm/mgag200/mgag200_main.c b/drivers/gpu/drm/mgag200/mgag200_main.c
index a1bfe7258364..26868e5c55b0 100644
--- a/drivers/gpu/drm/mgag200/mgag200_main.c
+++ b/drivers/gpu/drm/mgag200/mgag200_main.c
@@ -217,7 +217,10 @@ int mgag200_driver_load(struct drm_device *dev, unsigned long flags)
drm_mode_config_init(dev);
dev->mode_config.funcs = (void *)&mga_mode_funcs;
- dev->mode_config.preferred_depth = 24;
+ if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024))
+ dev->mode_config.preferred_depth = 16;
+ else
+ dev->mode_config.preferred_depth = 24;
dev->mode_config.prefer_shadow = 1;
r = mgag200_modeset_init(mdev);