diff options
| author | Helge Deller <deller@gmx.de> | 2008-03-10 11:44:01 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-03-10 18:01:20 -0700 |
| commit | 62347218243179a6ab03fe9f965a5819c4714bf8 (patch) | |
| tree | 8e2d022e4ef01808fe523d558ff24b007b3dbd30 /drivers/video/stifb.c | |
| parent | 1039edc98a80aece735b0c6d8b4e5f9dcec2cc32 (diff) | |
stifb: fix crash A1439A CRX (Rattler) graphics card
Fix kernel crash when stifb driver is used with a A1439A CRX (Rattler)
graphics card. (Reference:
http://thread.gmane.org/gmane.linux.ports.hppa/1834)
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/stifb.c')
| -rw-r--r-- | drivers/video/stifb.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/drivers/video/stifb.c b/drivers/video/stifb.c index e7c8db2eb49b..f98be301140c 100644 --- a/drivers/video/stifb.c +++ b/drivers/video/stifb.c @@ -505,16 +505,24 @@ ngleSetupAttrPlanes(struct stifb_info *fb, int BufferNumber) static void rattlerSetupPlanes(struct stifb_info *fb) { + int saved_id, y; + + /* Write RAMDAC pixel read mask register so all overlay + * planes are display-enabled. (CRX24 uses Bt462 pixel + * read mask register for overlay planes, not image planes). + */ CRX24_SETUP_RAMDAC(fb); - /* replacement for: SETUP_FB(fb, CRX24_OVERLAY_PLANES); */ - WRITE_WORD(0x83000300, fb, REG_14); - SETUP_HW(fb); - WRITE_BYTE(1, fb, REG_16b1); + /* change fb->id temporarily to fool SETUP_FB() */ + saved_id = fb->id; + fb->id = CRX24_OVERLAY_PLANES; + SETUP_FB(fb); + fb->id = saved_id; + + for (y = 0; y < fb->info.var.yres; ++y) + memset(fb->info.screen_base + y * fb->info.fix.line_length, + 0xff, fb->info.var.xres * fb->info.var.bits_per_pixel/8); - fb_memset((void*)fb->info.fix.smem_start, 0xff, - fb->info.var.yres*fb->info.fix.line_length); - CRX24_SET_OVLY_MASK(fb); SETUP_FB(fb); } |