From: Jordan Crouse Use the Geode GX BIOS virtual registers to get the actual size of the framebuffer. Signed-off-by: Jordan Crouse Signed-off-by: David Vrabel Signed-off-by: Antonino Daplas Signed-off-by: Andrew Morton --- drivers/video/geode/display_gx.c | 15 ++++++++++++--- drivers/video/geode/display_gx.h | 2 +- 2 files changed, 13 insertions(+), 4 deletions(-) diff -puN drivers/video/geode/display_gx.c~gxfb-get-the-frambuffer-size-from-the-bios drivers/video/geode/display_gx.c --- devel/drivers/video/geode/display_gx.c~gxfb-get-the-frambuffer-size-from-the-bios 2006-06-04 23:27:34.000000000 -0700 +++ devel-akpm/drivers/video/geode/display_gx.c 2006-06-04 23:27:34.000000000 -0700 @@ -21,10 +21,19 @@ #include "geodefb.h" #include "display_gx.h" -int gx_frame_buffer_size(void) +unsigned int gx_frame_buffer_size(void) { - /* Assuming 16 MiB. */ - return 16*1024*1024; + unsigned int val; + + /* FB size is reported by a virtual register */ + /* Virtual register class = 0x02 */ + /* VG_MEM_SIZE(512Kb units) = 0x00 */ + + outw(0XFC53, 0xAC1C); + outw(0x0200, 0xAC1C); + + val = (unsigned int)(inw(0xAC1E)) & 0xFFl; + return (val << 19); } int gx_line_delta(int xres, int bpp) diff -puN drivers/video/geode/display_gx.h~gxfb-get-the-frambuffer-size-from-the-bios drivers/video/geode/display_gx.h --- devel/drivers/video/geode/display_gx.h~gxfb-get-the-frambuffer-size-from-the-bios 2006-06-04 23:27:34.000000000 -0700 +++ devel-akpm/drivers/video/geode/display_gx.h 2006-06-04 23:27:34.000000000 -0700 @@ -11,7 +11,7 @@ #ifndef __DISPLAY_GX_H__ #define __DISPLAY_GX_H__ -int gx_frame_buffer_size(void); +unsigned int gx_frame_buffer_size(void); int gx_line_delta(int xres, int bpp); extern struct geode_dc_ops gx_dc_ops; _