diff options
author | Witold Filipczyk <witekfl@poczta.onet.pl> | 2007-05-08 03:37:07 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 14:15:25 -0400 |
commit | 125e1137cd2d93377028f521801d916729485733 (patch) | |
tree | e7cc2bc82c19d760dad61d1dfbee515c668449d8 /drivers/video/aty/aty128fb.c | |
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/aty/aty128fb.c')
-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) | |||
2165 | static int aty128fb_blank(int blank, struct fb_info *fb) | 2165 | static int aty128fb_blank(int blank, struct fb_info *fb) |
2166 | { | 2166 | { |
2167 | struct aty128fb_par *par = fb->par; | 2167 | struct aty128fb_par *par = fb->par; |
2168 | u8 state = 0; | 2168 | u8 state; |
2169 | 2169 | ||
2170 | if (par->lock_blank || par->asleep) | 2170 | if (par->lock_blank || par->asleep) |
2171 | return 0; | 2171 | return 0; |
2172 | 2172 | ||
2173 | if (blank & FB_BLANK_VSYNC_SUSPEND) | 2173 | switch (blank) { |
2174 | state |= 2; | 2174 | case FB_BLANK_NORMAL: |
2175 | if (blank & FB_BLANK_HSYNC_SUSPEND) | 2175 | state = 4; |
2176 | state |= 1; | 2176 | break; |
2177 | if (blank & FB_BLANK_POWERDOWN) | 2177 | case FB_BLANK_VSYNC_SUSPEND: |
2178 | state |= 4; | 2178 | state = 6; |
2179 | 2179 | break; | |
2180 | case FB_BLANK_HSYNC_SUSPEND: | ||
2181 | state = 5; | ||
2182 | break; | ||
2183 | case FB_BLANK_POWERDOWN: | ||
2184 | state = 7; | ||
2185 | break; | ||
2186 | case FB_BLANK_UNBLANK: | ||
2187 | default: | ||
2188 | state = 0; | ||
2189 | break; | ||
2190 | } | ||
2180 | aty_st_8(CRTC_EXT_CNTL+1, state); | 2191 | aty_st_8(CRTC_EXT_CNTL+1, state); |
2181 | 2192 | ||
2182 | if (par->chip_gen == rage_M3) { | 2193 | if (par->chip_gen == rage_M3) { |
@@ -2430,7 +2441,7 @@ static int aty128_pci_suspend(struct pci_dev *pdev, pm_message_t state) | |||
2430 | wait_for_idle(par); | 2441 | wait_for_idle(par); |
2431 | 2442 | ||
2432 | /* Blank display and LCD */ | 2443 | /* Blank display and LCD */ |
2433 | aty128fb_blank(VESA_POWERDOWN, info); | 2444 | aty128fb_blank(FB_BLANK_POWERDOWN, info); |
2434 | 2445 | ||
2435 | /* Sleep */ | 2446 | /* Sleep */ |
2436 | par->asleep = 1; | 2447 | par->asleep = 1; |