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drm/nouveau: Ignore broken legacy I2C entries.

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The nv05 card in the bug report [1] doesn't have usable I2C port
register offsets (they're all filled with zeros). Ignore them and use
the defaults.

[1] http://bugs.launchpad.net/bugs/569505

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Francisco Jerez 2010-06-19 13:54:48 +02:00 committed by Ben Skeggs
parent 190a43783f
commit 3af76454a7
1 changed files with 8 additions and 4 deletions
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12
drivers/gpu/drm/nouveau/nouveau_bios.c
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@ -5167,10 +5167,14 @@ static int parse_bmp_structure(struct drm_device *dev, struct nvbios *bios, unsi
bios->legacy.i2c_indices.crt = bios->data[legacy_i2c_offset];
bios->legacy.i2c_indices.tv = bios->data[legacy_i2c_offset + 1];
bios->legacy.i2c_indices.panel = bios->data[legacy_i2c_offset + 2];
bios->dcb.i2c[0].write = bios->data[legacy_i2c_offset + 4];
bios->dcb.i2c[0].read = bios->data[legacy_i2c_offset + 5];
bios->dcb.i2c[1].write = bios->data[legacy_i2c_offset + 6];
bios->dcb.i2c[1].read = bios->data[legacy_i2c_offset + 7];
if (bios->data[legacy_i2c_offset + 4])
bios->dcb.i2c[0].write = bios->data[legacy_i2c_offset + 4];
if (bios->data[legacy_i2c_offset + 5])
bios->dcb.i2c[0].read = bios->data[legacy_i2c_offset + 5];
if (bios->data[legacy_i2c_offset + 6])
bios->dcb.i2c[1].write = bios->data[legacy_i2c_offset + 6];
if (bios->data[legacy_i2c_offset + 7])
bios->dcb.i2c[1].read = bios->data[legacy_i2c_offset + 7];
if (bmplength > 74) {
bios->fmaxvco = ROM32(bmp[67]);