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>
diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
index 14a8627..3a4cc32 100644
--- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
@@ -487,6 +487,7 @@
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nouveau_fbdev *nfbdev;
+ int preferred_bpp;
int ret;
nfbdev = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
@@ -505,7 +506,15 @@
}
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;
}
