drm/i915/dg1: Read OPROM via SPI controller

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Read OPROM SPI through MMIO and find VBT entry since we can't use
OpRegion and PCI mapping may not work on some systems due to most BIOSes
not leaving the Option ROM mapped.

v2: Remove message with allocation failure

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Clint Taylor <clinton.a.taylor@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211216062645.3477854-1-lucas.demarchi@intel.com

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Clint Taylor 2021-12-15 22:26:45 -08:00 • committed by Lucas De Marchi

parent d0c0cf22d7

commit a36e7dc0af

2 changed files with 79 additions and 6 deletions

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77

drivers/gpu/drm/i915/display/intel_bios.c

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8

drivers/gpu/drm/i915/i915_reg.h

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