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ab3595bc4f
Sometimes it would be most enlightening to debug systems by replacing the VBT to be used. For example, in the referenced bug the BIOS provides different VBT depending on the boot mode (UEFI vs. legacy). It would be interesting to try the failing boot mode with the VBT from the working boot, and see if that makes a difference. Add a module parameter to load the VBT using the firmware loader, not unlike the EDID firmware mechanism. As a starting point for experimenting, one can pick up the BIOS provided VBT from /sys/kernel/debug/dri/0/i915_opregion/i915_vbt. v2: clarify firmware load return value check (Bob) v3: kfree the loaded firmware blob References: https://bugs.freedesktop.org/show_bug.cgi?id=97822#c83 Reviewed-by: Bob Paauwe <bob.j.paauwe@intel.com> Acked-by: Daniel Vetter <daniel@ffwll.ch> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170817115209.25912-1-jani.nikula@intel.com
83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
/*
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* Copyright © 2015 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#ifndef _I915_PARAMS_H_
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#define _I915_PARAMS_H_
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#include <linux/cache.h> /* for __read_mostly */
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#define I915_PARAMS_FOR_EACH(func) \
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func(char *, vbt_firmware); \
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func(int, modeset); \
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func(int, panel_ignore_lid); \
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func(int, semaphores); \
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func(int, lvds_channel_mode); \
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func(int, panel_use_ssc); \
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func(int, vbt_sdvo_panel_type); \
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func(int, enable_rc6); \
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func(int, enable_dc); \
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func(int, enable_fbc); \
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func(int, enable_ppgtt); \
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func(int, enable_execlists); \
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func(int, enable_psr); \
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func(int, disable_power_well); \
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func(int, enable_ips); \
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func(int, invert_brightness); \
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func(int, enable_guc_loading); \
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func(int, enable_guc_submission); \
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func(int, guc_log_level); \
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func(char *, guc_firmware_path); \
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func(char *, huc_firmware_path); \
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func(int, use_mmio_flip); \
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func(int, mmio_debug); \
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func(int, edp_vswing); \
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func(int, reset); \
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func(unsigned int, inject_load_failure); \
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/* leave bools at the end to not create holes */ \
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func(bool, alpha_support); \
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func(bool, enable_cmd_parser); \
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func(bool, enable_hangcheck); \
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func(bool, fastboot); \
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func(bool, prefault_disable); \
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func(bool, load_detect_test); \
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func(bool, force_reset_modeset_test); \
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func(bool, error_capture); \
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func(bool, disable_display); \
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func(bool, verbose_state_checks); \
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func(bool, nuclear_pageflip); \
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func(bool, enable_dp_mst); \
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func(bool, enable_dpcd_backlight); \
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func(bool, enable_gvt)
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#define MEMBER(T, member) T member
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struct i915_params {
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I915_PARAMS_FOR_EACH(MEMBER);
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};
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#undef MEMBER
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extern struct i915_params i915 __read_mostly;
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#endif
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