From ee79d54db45bb5e6da3eb76bae162c920aeb9763 Mon Sep 17 00:00:00 2001 From: Florian Tobias Schandinat Date: Wed, 10 Mar 2010 15:21:32 -0800 Subject: [PATCH] viafb: video address setting revisited Set always the correct video address. Especially do panning right on multiple IGAs. This should have no effect on single monitor mode (no SAMM, no dual fb). For SAMM without dual fb this might break something as I really cannot image what we are supposed to do for different resolutions with a single framebuffer as we can't get data out of nowhere (no, they are not set up in something one would call "expanded"). Previously I got for that funny colored pictures as the second IGA pointed to video memory that was never written to. After the patch it'll work as cloning if the first and second mode are identical (this was working already without SAMM). Finally for dual fb this should push us a step in the right direction. Signed-off-by: Florian Tobias Schandinat Cc: Scott Fang Cc: Joseph Chan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/via/hw.c | 2 -- drivers/video/via/viafbdev.c | 23 +++++++++++++++-------- 2 files changed, 15 insertions(+), 10 deletions(-) diff --git a/drivers/video/via/hw.c b/drivers/video/via/hw.c index 1aa3bb2f1a4e..400373fda210 100644 --- a/drivers/video/via/hw.c +++ b/drivers/video/via/hw.c @@ -2206,8 +2206,6 @@ int viafb_setmode(struct VideoModeTable *vmode_tbl, int video_bpp, outb(VPIT.SR[i - 1], VIASR + 1); } - viafb_set_primary_address(0); - viafb_set_secondary_address(viafb_SAMM_ON ? viafb_second_offset : 0); viafb_set_iga_path(); /* Write CRTC */ diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c index 4d955ca0a1d2..b417259868a8 100644 --- a/drivers/video/via/viafbdev.c +++ b/drivers/video/via/viafbdev.c @@ -50,6 +50,8 @@ static void apply_second_mode_setting(struct fb_var_screeninfo *sec_var); static void retrieve_device_setting(struct viafb_ioctl_setting *setting_info); +static int viafb_pan_display(struct fb_var_screeninfo *var, + struct fb_info *info); static struct fb_ops viafb_ops; @@ -182,6 +184,7 @@ static int viafb_set_par(struct fb_info *info) info->flags |= FBINFO_HWACCEL_DISABLED; viafb_setmode(vmode_entry, info->var.bits_per_pixel, vmode_entry1, viafb_bpp1); + viafb_pan_display(&info->var, info); } return 0; @@ -410,15 +413,19 @@ static int viafb_setcmap(struct fb_cmap *cmap, struct fb_info *info) static int viafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) { - unsigned int offset; - - DEBUG_MSG(KERN_INFO "viafb_pan_display!\n"); - - offset = (var->xoffset + (var->yoffset * var->xres_virtual)) * - var->bits_per_pixel / 16; + struct viafb_par *viapar = info->par; + u32 vram_addr = (var->yoffset * var->xres_virtual + var->xoffset) + * (var->bits_per_pixel / 8) + viapar->vram_addr; + + DEBUG_MSG(KERN_DEBUG "viafb_pan_display, address = %d\n", vram_addr); + if (!viafb_dual_fb) { + viafb_set_primary_address(vram_addr); + viafb_set_secondary_address(vram_addr); + } else if (viapar->iga_path == IGA1) + viafb_set_primary_address(vram_addr); + else + viafb_set_secondary_address(vram_addr); - DEBUG_MSG(KERN_INFO "\nviafb_pan_display,offset =%d ", offset); - viafb_set_primary_address(offset); return 0; } -- 2.39.5