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drm/nouveau: by default use low bpp framebuffer on low memory cards 

Framebuffer's BPP is not that important but can waste significant part
of memory on low-VRAM cards. Lower it to 8bpp on < 32MB cards and to
16bpp on 64MB cards. It can still be overridden by video= option.

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Marcin Slusarz 2011-11-06 20:32:04 +01:00 committed by Ben Skeggs
parent 4beb116a45
commit 1e482f75f1
1 changed files with 10 additions and 1 deletions
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11
drivers/gpu/drm/nouveau/nouveau_fbcon.c
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@ -487,6 +487,7 @@ int nouveau_fbcon_init(struct drm_device *dev)
{ {
struct drm_nouveau_private *dev_priv = dev->dev_private; struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_fbdev *nfbdev; struct nouveau_fbdev *nfbdev;
int preferred_bpp;
int ret; int ret;
nfbdev = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL); nfbdev = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
@ -505,7 +506,15 @@ int nouveau_fbcon_init(struct drm_device *dev)
} }
drm_fb_helper_single_add_all_connectors(&nfbdev->helper); drm_fb_helper_single_add_all_connectors(&nfbdev->helper);
drm_fb_helper_initial_config(&nfbdev->helper, 32);
if (dev_priv->vram_size <= 32 * 1024 * 1024)
preferred_bpp = 8;
else if (dev_priv->vram_size <= 64 * 1024 * 1024)
preferred_bpp = 16;
else
preferred_bpp = 32;
drm_fb_helper_initial_config(&nfbdev->helper, preferred_bpp);
return 0; return 0;
} }