linux_dsm_epyc7002/drivers/gpu/drm/i915/i915_params.h
Jani Nikula c43c5a8818 drm/i915/params: add i915 parameters to debugfs
Add a debugfs subdirectory i915_params with all the i915 module
parameters. This is a first step, with lots of boilerplate, and not much
benefit yet.

This will result in a new device specific debugfs directory at
/sys/kernel/debug/dri/<N>/i915_params duplicating the module specific
sysfs directory at /sys/module/i915/parameters/. Going forward, all
users of the parameters should use the debugfs, with the module
parameters being phased out.

Add debugfs permissions to I915_PARAMS_FOR_EACH(). This duplicates the
mode with module parameter sysfs, but the goal is to make the module
parameters read-only initial values for device specific parameters.

0 mode will bypass debugfs creation. Use it for verbose_state_checks
which will need special attention in follow-up work.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/600101c8433e7caf9303663fc85a9972fa1f05e7.1575560168.git.jani.nikula@intel.com
2020-01-15 15:10:16 +02:00

99 lines
3.7 KiB
C

/*
* Copyright © 2015 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
*/
#ifndef _I915_PARAMS_H_
#define _I915_PARAMS_H_
#include <linux/bitops.h>
#include <linux/cache.h> /* for __read_mostly */
struct drm_printer;
#define ENABLE_GUC_SUBMISSION BIT(0)
#define ENABLE_GUC_LOAD_HUC BIT(1)
/*
* Invoke param, a function-like macro, for each i915 param, with arguments:
*
* param(type, name, value, mode)
*
* type: parameter type, one of {bool, int, unsigned int, unsigned long, char *}
* name: name of the parameter
* value: initial/default value of the parameter
* mode: debugfs file permissions, one of {0400, 0600, 0}, use 0 to not create
* debugfs file
*/
#define I915_PARAMS_FOR_EACH(param) \
param(char *, vbt_firmware, NULL, 0400) \
param(int, modeset, -1, 0400) \
param(int, lvds_channel_mode, 0, 0400) \
param(int, panel_use_ssc, -1, 0600) \
param(int, vbt_sdvo_panel_type, -1, 0400) \
param(int, enable_dc, -1, 0400) \
param(int, enable_fbc, -1, 0600) \
param(int, enable_psr, -1, 0600) \
param(int, disable_power_well, -1, 0400) \
param(int, enable_ips, 1, 0600) \
param(int, invert_brightness, 0, 0600) \
param(int, enable_guc, 0, 0400) \
param(int, guc_log_level, -1, 0400) \
param(char *, guc_firmware_path, NULL, 0400) \
param(char *, huc_firmware_path, NULL, 0400) \
param(char *, dmc_firmware_path, NULL, 0400) \
param(int, mmio_debug, -IS_ENABLED(CONFIG_DRM_I915_DEBUG_MMIO), 0600) \
param(int, edp_vswing, 0, 0400) \
param(int, reset, 3, 0600) \
param(unsigned int, inject_probe_failure, 0, 0600) \
param(int, fastboot, -1, 0600) \
param(int, enable_dpcd_backlight, 0, 0600) \
param(char *, force_probe, CONFIG_DRM_I915_FORCE_PROBE, 0400) \
param(unsigned long, fake_lmem_start, 0, 0400) \
/* leave bools at the end to not create holes */ \
param(bool, alpha_support, IS_ENABLED(CONFIG_DRM_I915_ALPHA_SUPPORT), 0400) \
param(bool, enable_hangcheck, true, 0600) \
param(bool, prefault_disable, false, 0600) \
param(bool, load_detect_test, false, 0600) \
param(bool, force_reset_modeset_test, false, 0600) \
param(bool, error_capture, true, 0600) \
param(bool, disable_display, false, 0400) \
param(bool, verbose_state_checks, true, 0) \
param(bool, nuclear_pageflip, false, 0400) \
param(bool, enable_dp_mst, true, 0600) \
param(bool, enable_gvt, false, 0400)
#define MEMBER(T, member, ...) T member;
struct i915_params {
I915_PARAMS_FOR_EACH(MEMBER);
};
#undef MEMBER
extern struct i915_params i915_modparams __read_mostly;
void i915_params_dump(const struct i915_params *params, struct drm_printer *p);
void i915_params_copy(struct i915_params *dest, const struct i915_params *src);
void i915_params_free(struct i915_params *params);
#endif