diff options
| author | Witold Filipczyk <witekfl@poczta.onet.pl> | 2007-05-08 00:37:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:25 -0700 |
| commit | 125e1137cd2d93377028f521801d916729485733 (patch) | |
| tree | e7cc2bc82c19d760dad61d1dfbee515c668449d8 /drivers/video | |
| parent | c8e1693a4f63e317966f3dfe8f815eda95e26610 (diff) | |
aty128fb: fix blanking
I have a problem with blanking. The soundcard uses speakers of the monitor.
Sound is muted when the screen blanks due to a bug in aty128fb.c.
Here is a fragment of linux/fb.h
/* VESA Blanking Levels */
#define VESA_NO_BLANKING 0
#define VESA_VSYNC_SUSPEND 1
#define VESA_HSYNC_SUSPEND 2
#define VESA_POWERDOWN 3
enum {
/* screen: unblanked, hsync: on, vsync: on */
FB_BLANK_UNBLANK = VESA_NO_BLANKING,
/* screen: blanked, hsync: on, vsync: on */
FB_BLANK_NORMAL = VESA_NO_BLANKING + 1,
/* screen: blanked, hsync: on, vsync: off */
FB_BLANK_VSYNC_SUSPEND = VESA_VSYNC_SUSPEND + 1,
/* screen: blanked, hsync: off, vsync: on */
FB_BLANK_HSYNC_SUSPEND = VESA_HSYNC_SUSPEND + 1,
/* screen: blanked, hsync: off, vsync: off */
FB_BLANK_POWERDOWN = VESA_POWERDOWN + 1
};
So FB_BLANK_NORMAL is 1, FB_BLANK_VSYNC_SUSPEND is 2,
FB_BLANK_HSYNC_SUSPEND is 3, FB_BLANK_POWERDOWN is 4.
And now:
blank = FB_BLANK_NORMAL (1)
blank & FB_BLANK_HSYNC_SUSPEND (1 & 3) is true,
so normal blank caused hsync suspend and sound is muted.
Cc: James Simmons <jsimmons@infradead.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/aty/aty128fb.c | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/drivers/video/aty/aty128fb.c b/drivers/video/aty/aty128fb.c index e86d7e0c9825..7fea4d8ae8e2 100644 --- a/drivers/video/aty/aty128fb.c +++ b/drivers/video/aty/aty128fb.c @@ -2165,18 +2165,29 @@ static void __devexit aty128_remove(struct pci_dev *pdev) static int aty128fb_blank(int blank, struct fb_info *fb) { struct aty128fb_par *par = fb->par; - u8 state = 0; + u8 state; if (par->lock_blank || par->asleep) return 0; - if (blank & FB_BLANK_VSYNC_SUSPEND) - state |= 2; - if (blank & FB_BLANK_HSYNC_SUSPEND) - state |= 1; - if (blank & FB_BLANK_POWERDOWN) - state |= 4; - + switch (blank) { + case FB_BLANK_NORMAL: + state = 4; + break; + case FB_BLANK_VSYNC_SUSPEND: + state = 6; + break; + case FB_BLANK_HSYNC_SUSPEND: + state = 5; + break; + case FB_BLANK_POWERDOWN: + state = 7; + break; + case FB_BLANK_UNBLANK: + default: + state = 0; + break; + } aty_st_8(CRTC_EXT_CNTL+1, state); if (par->chip_gen == rage_M3) { @@ -2430,7 +2441,7 @@ static int aty128_pci_suspend(struct pci_dev *pdev, pm_message_t state) wait_for_idle(par); /* Blank display and LCD */ - aty128fb_blank(VESA_POWERDOWN, info); + aty128fb_blank(FB_BLANK_POWERDOWN, info); /* Sleep */ par->asleep = 1; |