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drm/i915: fix gpio register detection logic for BIOS without VBT

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if no VBT is present, crt_ddc_bus will be left at 0, and cause us
to use that for the GPIO register offset. That's never a valid register
offset, so let the "undefined" value be 0 instead of -1.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
[anholt: clarified the commit message a bit]
This commit is contained in:
Shaohua Li
2009-11-18 15:15:02 +08:00
committed by Eric Anholt
parent d271817bae
commit 29874f44fb
3 changed files with 2 additions and 6 deletions
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4
drivers/gpu/drm/i915/intel_bios.c
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@@ -283,10 +283,6 @@ parse_general_definitions(struct drm_i915_private *dev_priv,
GPIOF,
};
/* Set sensible defaults in case we can't find the general block
or it is the wrong chipset */
dev_priv->crt_ddc_bus = -1;
general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
if (general) {
u16 block_size = get_blocksize(general);