From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Paul Mackerras <paulus@samba.org>
Cc: linuxppc64-dev <linuxppc64-dev@ozlabs.org>,
linuxppc-dev list <linuxppc-dev@ozlabs.org>
Subject: [PATCH] powerpc: Fix platinumfb for some modes
Date: Tue, 13 Dec 2005 17:48:35 +1100 [thread overview]
Message-ID: <1134456515.6989.180.camel@gaston> (raw)
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) { \
reply other threads:[~2005-12-13 6:48 UTC|newest]
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