gxfb: replace FBSIZE config option with a module parameter (fa20c8a6) · Commits · 戴 / test

Documentation/fb/gxfb.txt

0 → 100644

+51 −0

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		[This file is cloned from VesaFB/aty128fb]

		What is gxfb?
		=================

		This is a graphics framebuffer driver for AMD Geode GX2 based processors.

		Advantages:

		* No need to use AMD's VSA code (or other VESA emulation layer) in the
		BIOS.
		* It provides a nice large console (128 cols + 48 lines with 1024x768)
		without using tiny, unreadable fonts.
		* You can run XF68_FBDev on top of /dev/fb0
		* Most important: boot logo :-)

		Disadvantages:

		* graphic mode is slower than text mode...


		How to use it?
		==============

		Switching modes is done using gxfb.mode_option=<resolution>... boot
		parameter or using `fbset' program.

		See Documentation/fb/modedb.txt for more information on modedb
		resolutions.


		X11
		===

		XF68_FBDev should generally work fine, but it is non-accelerated.


		Configuration
		=============

		You can pass kernel command line options to gxfb with gxfb.<option>.
		For example, gxfb.mode_option=800x600@75.
		Accepted options:

		mode_option - specify the video mode. Of the form
		<x>x<y>[-<bpp>][@<refresh>]
		vram - size of video ram (normally auto-detected)


		--
		Andres Salomon <dilinger@debian.org>

drivers/video/geode/Kconfig

+0 −20

Original line number	Diff line number	Diff line
		@@ -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

drivers/video/geode/display_gx.c

+0 −7

Original line number	Diff line number	Diff line
		@@ -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)
		{

drivers/video/geode/gxfb_core.c

+8 −6

Original line number	Diff line number	Diff line
		@@ -37,6 +37,7 @@
		#include "video_gx.h"

		static char *mode_option;
		static int vram;

		/* Modes relevant to the GX (taken from modedb.c) */
		static const struct fb_videomode gx_modedb[] __initdata = {
		@@ -208,7 +209,6 @@ 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);
		@@ -233,21 +233,20 @@ 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 = vram ? vram : 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;
		@@ -455,5 +454,8 @@ module_exit(gxfb_cleanup);
		module_param(mode_option, charp, 0);
		MODULE_PARM_DESC(mode_option, "video mode (<x>x<y>[-<bpp>][@<refr>])");

		module_param(vram, int, 0);
		MODULE_PARM_DESC(vram, "video memory size");

		MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode GX");
		MODULE_LICENSE("GPL");

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