[PATCH] powerpc: Fix platinumfb for some modes
DORMANTno replies
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: 2005-12-13 06:48:35
The platinumfb driver used only on some powermacs has an issue with some video modes & limited VRAM. This patch fixes it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Index: linux-work/drivers/video/platinumfb.h ===================================================================
--- linux-work.orig/drivers/video/platinumfb.h 2005-09-22 14:07:19.000000000 +1000
+++ linux-work/drivers/video/platinumfb.h 2005-11-25 17:17:17.000000000 +1100@@ -158,7 +158,9 @@ /* 832x624, 75Hz (13) */ static struct platinum_regvals platinum_reg_init_13 = { 0x70, - { 864, 1680, 3360 }, /* MacOS does 1680 instead of 1696 to fit 16bpp in 1MB */ + { 864, 1680, 3344 }, /* MacOS does 1680 instead of 1696 to fit 16bpp in 1MB, + * and we use 3344 instead of 3360 to fit in 2Mb + */ { 0xff0, 4, 0, 0, 0, 0, 0x299, 0, 0, 0x21e, 0x120, 0x10, 0x23f, 0x1f, 0x25, 0x37, 0x8a, 0x22a, 0x23e, 0x536, 0x534, 4, 9, 0x52,
Index: linux-work/drivers/video/platinumfb.c ===================================================================
--- linux-work.orig/drivers/video/platinumfb.c 2005-11-10 08:20:23.000000000 +1100
+++ linux-work/drivers/video/platinumfb.c 2005-11-25 17:17:17.000000000 +1100@@ -138,13 +138,15 @@ init = platinum_reg_init[pinfo->vmode-1]; - if (pinfo->vmode == 13 && pinfo->cmode > 0) - offset = 0x10; + if ((pinfo->vmode == VMODE_832_624_75) && (pinfo->cmode > CMODE_8)) + offset = 0x10; + info->screen_base = pinfo->frame_buffer + init->fb_offset + offset; info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset; info->fix.visual = (pinfo->cmode == CMODE_8) ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR; - info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode) + offset; + info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode) + + offset; printk("line_length: %x\n", info->fix.line_length); return 0; }
@@ -221,7 +223,9 @@ static inline int platinum_vram_reqd(int video_mode, int color_mode) { return vmode_attrs[video_mode-1].vres * - (vmode_attrs[video_mode-1].hres * (1<<color_mode) + 0x20) +0x1000; + (vmode_attrs[video_mode-1].hres * (1<<color_mode) + + ((video_mode == VMODE_832_624_75) && + (color_mode > CMODE_8)) ? 0x10 : 0x20) + 0x1000; } #define STORE_D2(a, d) { \