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authorFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>2010-03-10 15:21:34 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-12 15:52:33 -0800
commit5c9443ed284fc6ec8a4f702c66e9ad6bdf912c05 (patch)
tree3eee936484402bcaf06c99e593707ca256e305aa /drivers/video
parentee79d54db45bb5e6da3eb76bae162c920aeb9763 (diff)
viafb: make viafb_set_par more dual framebuffer compatible
This patch is an attempt to make viafb_set_par work correctly with more than one framebuffer. As modesetting is not (yet/easily) possible for each individual IGA it uses the (normally to be avoided) global variables viafbinfo{,1} to ensure that each function is called with the correct values. This patch (finally) allows usable dual framebuffer setups and should not affect non dual fb ones. It works in some (most?) configurations as sometimes the driver still gets device connections wrong. It can be worth to try the devices in reverse order (in viafb_active_dev). The user experience is still not very nice as: - on the second fb you'll normally have a garbled picture as long as no application draws to it goal: auto on/off devices depending on reference counting - as the whole machinery is always done you can see mode changes also in an unaffected framebuffer goal: split modesetting up for each individual IGA Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Scott Fang <ScottFang@viatech.com.cn> Cc: Joseph Chan <JosephChan@via.com.tw> 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/via/viafbdev.c20
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c
index b417259868a..b1569a73e4b 100644
--- a/drivers/video/via/viafbdev.c
+++ b/drivers/video/via/viafbdev.c
@@ -160,11 +160,17 @@ static int viafb_set_par(struct fb_info *info)
DEBUG_MSG(KERN_INFO "viafb_set_par!\n");
viapar->depth = fb_get_color_depth(&info->var, &info->fix);
- viafb_update_device_setting(info->var.xres, info->var.yres,
- info->var.bits_per_pixel, viafb_refresh, 0);
+ viafb_update_device_setting(viafbinfo->var.xres, viafbinfo->var.yres,
+ viafbinfo->var.bits_per_pixel, viafb_refresh, 0);
- vmode_entry = viafb_get_mode(info->var.xres, info->var.yres);
- if (viafb_SAMM_ON == 1) {
+ vmode_entry = viafb_get_mode(viafbinfo->var.xres, viafbinfo->var.yres);
+ if (viafb_dual_fb) {
+ vmode_entry1 = viafb_get_mode(viafbinfo1->var.xres,
+ viafbinfo1->var.yres);
+ viafb_update_device_setting(viafbinfo1->var.xres,
+ viafbinfo1->var.yres, viafbinfo1->var.bits_per_pixel,
+ viafb_refresh1, 1);
+ } else if (viafb_SAMM_ON == 1) {
DEBUG_MSG(KERN_INFO
"viafb_second_xres = %d, viafb_second_yres = %d, bpp = %d\n",
viafb_second_xres, viafb_second_yres, viafb_bpp1);
@@ -177,7 +183,11 @@ static int viafb_set_par(struct fb_info *info)
if (vmode_entry) {
viafb_update_fix(info);
- viafb_bpp = info->var.bits_per_pixel;
+ if (viafb_dual_fb && viapar->iga_path == IGA2)
+ viafb_bpp1 = info->var.bits_per_pixel;
+ else
+ viafb_bpp = info->var.bits_per_pixel;
+
if (info->var.accel_flags & FB_ACCELF_TEXT)
info->flags &= ~FBINFO_HWACCEL_DISABLED;
else