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@xxxxxx>
---
drivers/video/via/viafbdev.c | 22 ++++++++++++++++------
1 files changed, 16 insertions(+), 6 deletions(-)
diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c
index b417259..b1569a7 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
--
1.6.3.2
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