tree a97dc33b2ce9a0553fb6b9b3206ee7674ae4d06a parent 53eed4ec8bcd8701b9135859ec46b10a0d88ba25 author Antonino A. Daplas <[EMAIL PROTECTED]> Sat, 10 Sep 2005 03:04:34 -0700 committer Linus Torvalds <[EMAIL PROTECTED]> Sat, 10 Sep 2005 03:57:59 -0700
[PATCH] fbdev: Resurrect hooks to get EDID from firmware For the i386, code is already present in video.S that gets the EDID from the video BIOS. Make this visible so drivers can also use this data as fallback when i2c does not work. To ensure that the EDID block is returned for the primary graphics adapter only, by check if the IORESOURCE_ROM_SHADOW flag is set. Signed-off-by: Antonino Daplas <[EMAIL PROTECTED]> Signed-off-by: Andrew Morton <[EMAIL PROTECTED]> Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]> arch/i386/boot/video.S | 2 +- arch/i386/kernel/setup.c | 1 + drivers/video/fbmon.c | 35 ++++++++++++++++++++++++++++++++++- include/linux/fb.h | 4 +++- 4 files changed, 39 insertions(+), 3 deletions(-) diff --git a/arch/i386/boot/video.S b/arch/i386/boot/video.S --- a/arch/i386/boot/video.S +++ b/arch/i386/boot/video.S @@ -1949,7 +1949,7 @@ store_edid: movw $0x4f15, %ax # do VBE/DDC movw $0x01, %bx movw $0x00, %cx - movw $0x01, %dx + movw $0x00, %dx movw $0x140, %di int $0x10 diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c --- a/arch/i386/kernel/setup.c +++ b/arch/i386/kernel/setup.c @@ -139,6 +139,7 @@ struct sys_desc_table_struct { unsigned char table[0]; }; struct edid_info edid_info; +EXPORT_SYMBOL_GPL(edid_info); struct ist_info ist_info; #if defined(CONFIG_X86_SPEEDSTEP_SMI) || \ defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE) diff --git a/drivers/video/fbmon.c b/drivers/video/fbmon.c --- a/drivers/video/fbmon.c +++ b/drivers/video/fbmon.c @@ -29,6 +29,7 @@ #include <linux/tty.h> #include <linux/fb.h> #include <linux/module.h> +#include <video/edid.h> #ifdef CONFIG_PPC_OF #include <linux/pci.h> #include <asm/prom.h> @@ -1251,9 +1252,41 @@ int fb_validate_mode(const struct fb_var -EINVAL : 0; } +#if defined(__i386__) +#include <linux/pci.h> + +/* + * We need to ensure that the EDID block is only returned for + * the primary graphics adapter. + */ + +const unsigned char *fb_firmware_edid(struct device *device) +{ + struct pci_dev *dev = NULL; + struct resource *res = NULL; + unsigned char *edid = NULL; + + if (device) + dev = to_pci_dev(device); + + if (dev) + res = &dev->resource[PCI_ROM_RESOURCE]; + + if (res && res->flags & IORESOURCE_ROM_SHADOW) + edid = edid_info.dummy; + + return edid; +} +#else +const unsigned char *fb_firmware_edid(struct device *device) +{ + return NULL; +} +#endif /* _i386_ */ + EXPORT_SYMBOL(fb_parse_edid); EXPORT_SYMBOL(fb_edid_to_monspecs); - +EXPORT_SYMBOL(fb_firmware_edid); EXPORT_SYMBOL(fb_get_mode); EXPORT_SYMBOL(fb_validate_mode); EXPORT_SYMBOL(fb_destroy_modedb); diff --git a/include/linux/fb.h b/include/linux/fb.h --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -859,7 +859,9 @@ extern int fb_get_mode(int flags, u32 va extern int fb_validate_mode(const struct fb_var_screeninfo *var, struct fb_info *info); extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var); -extern void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs); +extern const unsigned char *fb_firmware_edid(struct device *device); +extern void fb_edid_to_monspecs(unsigned char *edid, + struct fb_monspecs *specs); extern void fb_destroy_modedb(struct fb_videomode *modedb); /* drivers/video/modedb.c */ - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html