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drm/nouveau/bios: allow loading alternate vbios image as firmware

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Useful for debugging different VBIOS versions.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2012-03-30 13:14:45 +10:00
parent c6b7e89582
commit 78339fb75c
1 changed files with 21 additions and 0 deletions
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21
drivers/gpu/drm/nouveau/nouveau_bios.c
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@ -30,6 +30,7 @@
#include "nouveau_gpio.h"
#include <linux/io-mapping.h>
#include <linux/firmware.h>
/* these defines are made up */
#define NV_CIO_CRE_44_HEADA 0x0
@ -249,8 +250,12 @@ bios_shadow(struct drm_device *dev)
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nvbios *bios = &dev_priv->vbios;
struct methods *mthd, *best;
const struct firmware *fw;
char fname[32];
int ret;
if (nouveau_vbios) {
/* try to match one of the built-in methods */
mthd = shadow_methods;
do {
if (strcasecmp(nouveau_vbios, mthd->desc))
@ -263,6 +268,22 @@ bios_shadow(struct drm_device *dev)
return true;
} while ((++mthd)->shadow);
/* attempt to load firmware image */
snprintf(fname, sizeof(fname), "nouveau/%s", nouveau_vbios);
ret = request_firmware(&fw, fname, &dev->pdev->dev);
if (ret == 0) {
bios->length = fw->size;
bios->data = kmemdup(fw->data, fw->size, GFP_KERNEL);
release_firmware(fw);
NV_INFO(dev, "VBIOS image: %s\n", nouveau_vbios);
if (score_vbios(bios, 1))
return true;
kfree(bios->data);
bios->data = NULL;
}
NV_ERROR(dev, "VBIOS source \'%s\' invalid\n", nouveau_vbios);
}