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Date: Sat, 23 Feb 2008 01:10:45 -0500
From: Andres Salomon <dilinger@...ued.net>
To: adaplas@...il.com
Cc: linux-kernel@...r.kernel.org,
linux-fbdev-devel@...ts.sourceforge.net, info-linux@...de.amd.com,
Jordan Crouse <jordan.crouse@....com>, dwmw2@...radead.org
Subject: [PATCH 1/4] gxfb: Replace FBSIZE config option with a kernel
argument
Use a command line option (fbsize:) rather than hardcoding the vram size.
LxFB already does this; it's useful for machines that can't query the
BIOS for fb size. This patch originated from David Woodhouse, was
modified by Jordan Crouse, and was then modified further by me.
Signed-off-by: Andres Salomon <dilinger@...ian.org>
Acked-by: Jordan Crouse <jordan.crouse@....com>
---
drivers/video/geode/Kconfig | 20 --------------------
drivers/video/geode/display_gx.c | 7 -------
drivers/video/geode/gxfb_core.c | 19 ++++++++++++-------
3 files changed, 12 insertions(+), 34 deletions(-)
diff --git a/drivers/video/geode/Kconfig b/drivers/video/geode/Kconfig
index 7608429..c5d8ba4 100644
--- a/drivers/video/geode/Kconfig
+++ b/drivers/video/geode/Kconfig
@@ -38,26 +38,6 @@ config FB_GEODE_GX
If unsure, say N.
-config FB_GEODE_GX_SET_FBSIZE
- bool "Manually specify the Geode GX framebuffer size"
- depends on FB_GEODE_GX
- default n
- ---help---
- If you want to manually specify the size of your GX framebuffer,
- say Y here, otherwise say N to dynamically probe it.
-
- Say N unless you know what you are doing.
-
-config FB_GEODE_GX_FBSIZE
- hex "Size of the GX framebuffer, in bytes"
- depends on FB_GEODE_GX_SET_FBSIZE
- default "0x1600000"
- ---help---
- Specify the size of the GX framebuffer. Normally, you will
- want this to be MB aligned. Common values are 0x80000 (8MB)
- and 0x1600000 (16MB). Don't change this unless you know what
- you are doing
-
config FB_GEODE_GX1
tristate "AMD Geode GX1 framebuffer support (EXPERIMENTAL)"
depends on FB && FB_GEODE && EXPERIMENTAL
diff --git a/drivers/video/geode/display_gx.c b/drivers/video/geode/display_gx.c
index 0f16e4b..8cd7572 100644
--- a/drivers/video/geode/display_gx.c
+++ b/drivers/video/geode/display_gx.c
@@ -21,12 +21,6 @@
#include "geodefb.h"
#include "display_gx.h"
-#ifdef CONFIG_FB_GEODE_GX_SET_FBSIZE
-unsigned int gx_frame_buffer_size(void)
-{
- return CONFIG_FB_GEODE_GX_FBSIZE;
-}
-#else
unsigned int gx_frame_buffer_size(void)
{
unsigned int val;
@@ -41,7 +35,6 @@ unsigned int gx_frame_buffer_size(void)
val = (unsigned int)(inw(0xAC1E)) & 0xFFl;
return (val << 19);
}
-#endif
int gx_line_delta(int xres, int bpp)
{
diff --git a/drivers/video/geode/gxfb_core.c b/drivers/video/geode/gxfb_core.c
index cf841ef..07ff4bc 100644
--- a/drivers/video/geode/gxfb_core.c
+++ b/drivers/video/geode/gxfb_core.c
@@ -36,6 +36,7 @@
#include "video_gx.h"
static char *mode_option;
+static int fbsize;
/* Modes relevant to the GX (taken from modedb.c) */
static const struct fb_videomode gx_modedb[] __initdata = {
@@ -207,7 +208,6 @@ static int gxfb_blank(int blank_mode, struct fb_info *info)
static int __init gxfb_map_video_memory(struct fb_info *info, struct pci_dev *dev)
{
struct geodefb_par *par = info->par;
- int fb_len;
int ret;
ret = pci_enable_device(dev);
@@ -232,21 +232,20 @@ static int __init gxfb_map_video_memory(struct fb_info *info, struct pci_dev *de
ret = pci_request_region(dev, 0, "gxfb (framebuffer)");
if (ret < 0)
return ret;
- if ((fb_len = gx_frame_buffer_size()) < 0)
- return -ENOMEM;
+
info->fix.smem_start = pci_resource_start(dev, 0);
- info->fix.smem_len = fb_len;
+ info->fix.smem_len = fbsize ? fbsize : gx_frame_buffer_size();
info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
if (!info->screen_base)
return -ENOMEM;
- /* Set the 16MB aligned base address of the graphics memory region
+ /* Set the 16MiB aligned base address of the graphics memory region
* in the display controller */
writel(info->fix.smem_start & 0xFF000000,
par->dc_regs + DC_GLIU0_MEM_OFFSET);
- dev_info(&dev->dev, "%d Kibyte of video memory at 0x%lx\n",
+ dev_info(&dev->dev, "%d KiB of video memory at 0x%lx\n",
info->fix.smem_len / 1024, info->fix.smem_start);
return 0;
@@ -425,7 +424,10 @@ static int __init gxfb_setup(char *options)
if (!*opt)
continue;
- mode_option = opt;
+ if (!strncmp(opt, "fbsize:", 7))
+ fbsize = simple_strtoul(opt+7, NULL, 0);
+ else
+ mode_option = opt;
}
return 0;
@@ -456,5 +458,8 @@ module_exit(gxfb_cleanup);
module_param(mode_option, charp, 0);
MODULE_PARM_DESC(mode_option, "video mode (<x>x<y>[-<bpp>][@<refr>])");
+module_param(fbsize, int, 0);
+MODULE_PARM_DESC(fbsize, "video memory size");
+
MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode GX");
MODULE_LICENSE("GPL");
--
1.5.3.7
--
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