286 lines
10 KiB
C
286 lines
10 KiB
C
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/*
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* Copyright © 2014 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
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the 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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#include <linux/string_helpers.h>
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#include <drm/drm_print.h>
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#include "i915_params.h"
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#include "i915_drv.h"
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DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0,
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"DRM_UT_CORE",
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"DRM_UT_DRIVER",
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"DRM_UT_KMS",
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"DRM_UT_PRIME",
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"DRM_UT_ATOMIC",
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"DRM_UT_VBL",
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"DRM_UT_STATE",
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"DRM_UT_LEASE",
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"DRM_UT_DP",
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"DRM_UT_DRMRES");
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#define i915_param_named(name, T, perm, desc) \
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module_param_named(name, i915_modparams.name, T, perm); \
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MODULE_PARM_DESC(name, desc)
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#define i915_param_named_unsafe(name, T, perm, desc) \
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module_param_named_unsafe(name, i915_modparams.name, T, perm); \
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MODULE_PARM_DESC(name, desc)
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struct i915_params i915_modparams __read_mostly = {
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#define MEMBER(T, member, value, ...) .member = (value),
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I915_PARAMS_FOR_EACH(MEMBER)
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#undef MEMBER
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};
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/*
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* Note: As a rule, keep module parameter sysfs permissions read-only
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* 0400. Runtime changes are only supported through i915 debugfs.
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*
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* For any exceptions requiring write access and runtime changes through module
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* parameter sysfs, prevent debugfs file creation by setting the parameter's
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* debugfs mode to 0.
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*/
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i915_param_named(modeset, int, 0400,
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"Use kernel modesetting [KMS] (0=disable, "
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"1=on, -1=force vga console preference [default])");
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i915_param_named_unsafe(enable_dc, int, 0400,
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"Enable power-saving display C-states. "
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"(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6; "
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"3=up to DC5 with DC3CO; 4=up to DC6 with DC3CO)");
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i915_param_named_unsafe(enable_fbc, int, 0400,
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"Enable frame buffer compression for power savings "
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"(default: -1 (use per-chip default))");
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i915_param_named_unsafe(lvds_channel_mode, int, 0400,
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"Specify LVDS channel mode "
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"(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
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i915_param_named_unsafe(panel_use_ssc, int, 0400,
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"Use Spread Spectrum Clock with panels [LVDS/eDP] "
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"(default: auto from VBT)");
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i915_param_named_unsafe(vbt_sdvo_panel_type, int, 0400,
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"Override/Ignore selection of SDVO panel mode in the VBT "
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"(-2=ignore, -1=auto [default], index in VBT BIOS table)");
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i915_param_named_unsafe(reset, uint, 0400,
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"Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])");
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i915_param_named_unsafe(vbt_firmware, charp, 0400,
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"Load VBT from specified file under /lib/firmware");
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#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
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i915_param_named(error_capture, bool, 0400,
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"Record the GPU state following a hang. "
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"This information in /sys/class/drm/card<N>/error is vital for "
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"triaging and debugging hangs.");
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#endif
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i915_param_named_unsafe(enable_hangcheck, bool, 0400,
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"Periodically check GPU activity for detecting hangs. "
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"WARNING: Disabling this can cause system wide hangs. "
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"(default: true)");
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i915_param_named_unsafe(enable_psr, int, 0400,
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"Enable PSR "
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"(0=disabled, 1=enable up to PSR1, 2=enable up to PSR2) "
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"Default: -1 (use per-chip default)");
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i915_param_named(psr_safest_params, bool, 0400,
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"Replace PSR VBT parameters by the safest and not optimal ones. This "
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"is helpful to detect if PSR issues are related to bad values set in "
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" VBT. (0=use VBT parameters, 1=use safest parameters)");
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i915_param_named_unsafe(enable_psr2_sel_fetch, bool, 0400,
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"Enable PSR2 selective fetch "
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"(0=disabled, 1=enabled) "
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"Default: 0");
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i915_param_named_unsafe(force_probe, charp, 0400,
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"Force probe options for specified supported devices. "
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"See CONFIG_DRM_I915_FORCE_PROBE for details.");
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i915_param_named_unsafe(disable_power_well, int, 0400,
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"Disable display power wells when possible "
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"(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
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i915_param_named_unsafe(enable_ips, int, 0400, "Enable IPS (default: true)");
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i915_param_named(fastboot, int, 0400,
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"Try to skip unnecessary mode sets at boot time "
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"(0=disabled, 1=enabled) "
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"Default: -1 (use per-chip default)");
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i915_param_named_unsafe(load_detect_test, bool, 0400,
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"Force-enable the VGA load detect code for testing (default:false). "
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"For developers only.");
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i915_param_named_unsafe(force_reset_modeset_test, bool, 0400,
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"Force a modeset during gpu reset for testing (default:false). "
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"For developers only.");
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i915_param_named_unsafe(invert_brightness, int, 0400,
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"Invert backlight brightness "
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"(-1 force normal, 0 machine defaults, 1 force inversion), please "
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"report PCI device ID, subsystem vendor and subsystem device ID "
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"to dri-devel@lists.freedesktop.org, if your machine needs it. "
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"It will then be included in an upcoming module version.");
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i915_param_named(disable_display, bool, 0400,
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"Disable display (default: false)");
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i915_param_named(memtest, bool, 0400,
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"Perform a read/write test of all device memory on module load (default: off)");
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i915_param_named(mmio_debug, int, 0400,
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"Enable the MMIO debug code for the first N failures (default: off). "
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"This may negatively affect performance.");
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/* Special case writable file */
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i915_param_named(verbose_state_checks, bool, 0600,
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"Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
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i915_param_named_unsafe(nuclear_pageflip, bool, 0400,
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"Force enable atomic functionality on platforms that don't have full support yet.");
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/* WA to get away with the default setting in VBT for early platforms.Will be removed */
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i915_param_named_unsafe(edp_vswing, int, 0400,
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"Ignore/Override vswing pre-emph table selection from VBT "
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"(0=use value from vbt [default], 1=low power swing(200mV),"
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"2=default swing(400mV))");
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i915_param_named_unsafe(enable_guc, int, 0400,
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"Enable GuC load for GuC submission and/or HuC load. "
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"Required functionality can be selected using bitmask values. "
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"(-1=auto [default], 0=disable, 1=GuC submission, 2=HuC load)");
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i915_param_named(guc_log_level, int, 0400,
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"GuC firmware logging level. Requires GuC to be loaded. "
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"(-1=auto [default], 0=disable, 1..4=enable with verbosity min..max)");
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i915_param_named_unsafe(guc_firmware_path, charp, 0400,
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"GuC firmware path to use instead of the default one");
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i915_param_named_unsafe(huc_firmware_path, charp, 0400,
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"HuC firmware path to use instead of the default one");
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i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
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"DMC firmware path to use instead of the default one");
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i915_param_named_unsafe(enable_dp_mst, bool, 0400,
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"Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
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#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
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i915_param_named_unsafe(inject_probe_failure, uint, 0400,
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"Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
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#endif
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i915_param_named(enable_dpcd_backlight, int, 0400,
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"Enable support for DPCD backlight control"
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"(-1=use per-VBT LFP backlight type setting [default], 0=disabled, 1=enable, 2=force VESA interface, 3=force Intel interface)");
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#if IS_ENABLED(CONFIG_DRM_I915_GVT)
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i915_param_named(enable_gvt, bool, 0400,
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"Enable support for Intel GVT-g graphics virtualization host support(default:false)");
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#endif
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#if CONFIG_DRM_I915_REQUEST_TIMEOUT
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i915_param_named_unsafe(request_timeout_ms, uint, 0600,
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"Default request/fence/batch buffer expiration timeout.");
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#endif
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i915_param_named_unsafe(lmem_size, uint, 0400,
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"Set the lmem size(in MiB) for each region. (default: 0, all memory)");
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i915_param_named_unsafe(lmem_bar_size, uint, 0400,
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"Set the lmem bar size(in MiB).");
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static __always_inline void _print_param(struct drm_printer *p,
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const char *name,
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const char *type,
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const void *x)
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{
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if (!__builtin_strcmp(type, "bool"))
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drm_printf(p, "i915.%s=%s\n", name,
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str_yes_no(*(const bool *)x));
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else if (!__builtin_strcmp(type, "int"))
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drm_printf(p, "i915.%s=%d\n", name, *(const int *)x);
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else if (!__builtin_strcmp(type, "unsigned int"))
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drm_printf(p, "i915.%s=%u\n", name, *(const unsigned int *)x);
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else if (!__builtin_strcmp(type, "unsigned long"))
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drm_printf(p, "i915.%s=%lu\n", name, *(const unsigned long *)x);
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else if (!__builtin_strcmp(type, "char *"))
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drm_printf(p, "i915.%s=%s\n", name, *(const char **)x);
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else
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WARN_ONCE(1, "no printer defined for param type %s (i915.%s)\n",
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type, name);
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}
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/**
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* i915_params_dump - dump i915 modparams
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* @params: i915 modparams
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* @p: the &drm_printer
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*
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* Pretty printer for i915 modparams.
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*/
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void i915_params_dump(const struct i915_params *params, struct drm_printer *p)
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{
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#define PRINT(T, x, ...) _print_param(p, #x, #T, ¶ms->x);
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I915_PARAMS_FOR_EACH(PRINT);
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#undef PRINT
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}
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static __always_inline void dup_param(const char *type, void *x)
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{
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if (!__builtin_strcmp(type, "char *"))
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*(void **)x = kstrdup(*(void **)x, GFP_ATOMIC);
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}
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void i915_params_copy(struct i915_params *dest, const struct i915_params *src)
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{
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*dest = *src;
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#define DUP(T, x, ...) dup_param(#T, &dest->x);
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I915_PARAMS_FOR_EACH(DUP);
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#undef DUP
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}
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static __always_inline void free_param(const char *type, void *x)
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{
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if (!__builtin_strcmp(type, "char *")) {
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kfree(*(void **)x);
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*(void **)x = NULL;
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}
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}
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/* free the allocated members, *not* the passed in params itself */
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void i915_params_free(struct i915_params *params)
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{
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#define FREE(T, x, ...) free_param(#T, ¶ms->x);
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I915_PARAMS_FOR_EACH(FREE);
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#undef FREE
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}
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