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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2005-12-13 17:48:35 +1100
committerPaul Mackerras <paulus@samba.org>2006-01-09 14:53:51 +1100
commit9cf84d7c97992dbe5360b241327341c07ce30fc9 (patch)
treede606aa77fb0d8c4d4c32106ac4fe7fa287cf27e
parentf75225d0a01e4f468b0395b02e549d2763bbabfb (diff)
downloadblackbird-op-linux-9cf84d7c97992dbe5360b241327341c07ce30fc9.tar.gz
blackbird-op-linux-9cf84d7c97992dbe5360b241327341c07ce30fc9.zip
[PATCH] powerpc: Fix platinumfb for some modes
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> Signed-off-by: Paul Mackerras <paulus@samba.org>
-rw-r--r--drivers/video/platinumfb.c12
-rw-r--r--drivers/video/platinumfb.h4
2 files changed, 11 insertions, 5 deletions
diff --git a/drivers/video/platinumfb.c b/drivers/video/platinumfb.c
index ca4082ae5a18..ba0af1b66bb6 100644
--- a/drivers/video/platinumfb.c
+++ b/drivers/video/platinumfb.c
@@ -138,13 +138,15 @@ static int platinumfb_set_par (struct fb_info *info)
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 int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
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) { \
diff --git a/drivers/video/platinumfb.h b/drivers/video/platinumfb.h
index 2834fc1c344b..f6bd77cafd17 100644
--- a/drivers/video/platinumfb.h
+++ b/drivers/video/platinumfb.h
@@ -158,7 +158,9 @@ static struct platinum_regvals platinum_reg_init_14 = {
/* 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,
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