2 * Copyright © 2014 Intel Corporation
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16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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25 #include "i915_params.h"
28 #define i915_param_named(name, T, perm, desc) \
29 module_param_named(name, i915_modparams.name, T, perm); \
30 MODULE_PARM_DESC(name, desc)
31 #define i915_param_named_unsafe(name, T, perm, desc) \
32 module_param_named_unsafe(name, i915_modparams.name, T, perm); \
33 MODULE_PARM_DESC(name, desc)
35 struct i915_params i915_modparams __read_mostly = {
36 #define MEMBER(T, member, value) .member = (value),
37 I915_PARAMS_FOR_EACH(MEMBER)
41 i915_param_named(modeset, int, 0400,
42 "Use kernel modesetting [KMS] (0=disable, "
43 "1=on, -1=force vga console preference [default])");
45 i915_param_named_unsafe(panel_ignore_lid, int, 0600,
46 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
47 "-1=force lid closed, -2=force lid open)");
49 i915_param_named_unsafe(semaphores, int, 0400,
50 "Use semaphores for inter-ring sync "
51 "(default: -1 (use per-chip defaults))");
53 i915_param_named_unsafe(enable_rc6, int, 0400,
54 "Enable power-saving render C-state 6. "
55 "Different stages can be selected via bitmask values "
56 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
57 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
58 "default: -1 (use per-chip default)");
60 i915_param_named_unsafe(enable_dc, int, 0400,
61 "Enable power-saving display C-states. "
62 "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)");
64 i915_param_named_unsafe(enable_fbc, int, 0600,
65 "Enable frame buffer compression for power savings "
66 "(default: -1 (use per-chip default))");
68 i915_param_named_unsafe(lvds_channel_mode, int, 0400,
69 "Specify LVDS channel mode "
70 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
72 i915_param_named_unsafe(panel_use_ssc, int, 0600,
73 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
74 "(default: auto from VBT)");
76 i915_param_named_unsafe(vbt_sdvo_panel_type, int, 0400,
77 "Override/Ignore selection of SDVO panel mode in the VBT "
78 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
80 i915_param_named_unsafe(reset, int, 0600,
81 "Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])");
83 i915_param_named_unsafe(vbt_firmware, charp, 0400,
84 "Load VBT from specified file under /lib/firmware");
86 #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
87 i915_param_named(error_capture, bool, 0600,
88 "Record the GPU state following a hang. "
89 "This information in /sys/class/drm/card<N>/error is vital for "
90 "triaging and debugging hangs.");
93 i915_param_named_unsafe(enable_hangcheck, bool, 0644,
94 "Periodically check GPU activity for detecting hangs. "
95 "WARNING: Disabling this can cause system wide hangs. "
98 i915_param_named_unsafe(enable_ppgtt, int, 0400,
99 "Override PPGTT usage. "
100 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)");
102 i915_param_named_unsafe(enable_execlists, int, 0400,
103 "Override execlists usage. "
104 "(-1=auto [default], 0=disabled, 1=enabled)");
106 i915_param_named_unsafe(enable_psr, int, 0600,
108 "(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) "
109 "Default: -1 (use per-chip default)");
111 i915_param_named_unsafe(alpha_support, bool, 0400,
112 "Enable alpha quality driver support for latest hardware. "
113 "See also CONFIG_DRM_I915_ALPHA_SUPPORT.");
115 i915_param_named_unsafe(disable_power_well, int, 0400,
116 "Disable display power wells when possible "
117 "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
119 i915_param_named_unsafe(enable_ips, int, 0600, "Enable IPS (default: true)");
121 i915_param_named(fastboot, bool, 0600,
122 "Try to skip unnecessary mode sets at boot time (default: false)");
124 i915_param_named_unsafe(prefault_disable, bool, 0600,
125 "Disable page prefaulting for pread/pwrite/reloc (default:false). "
126 "For developers only.");
128 i915_param_named_unsafe(load_detect_test, bool, 0600,
129 "Force-enable the VGA load detect code for testing (default:false). "
130 "For developers only.");
132 i915_param_named_unsafe(force_reset_modeset_test, bool, 0600,
133 "Force a modeset during gpu reset for testing (default:false). "
134 "For developers only.");
136 i915_param_named_unsafe(invert_brightness, int, 0600,
137 "Invert backlight brightness "
138 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
139 "report PCI device ID, subsystem vendor and subsystem device ID "
140 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
141 "It will then be included in an upcoming module version.");
143 i915_param_named(disable_display, bool, 0400,
144 "Disable display (default: false)");
146 i915_param_named_unsafe(enable_cmd_parser, bool, 0400,
147 "Enable command parsing (true=enabled [default], false=disabled)");
149 i915_param_named(mmio_debug, int, 0600,
150 "Enable the MMIO debug code for the first N failures (default: off). "
151 "This may negatively affect performance.");
153 i915_param_named(verbose_state_checks, bool, 0600,
154 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
156 i915_param_named_unsafe(nuclear_pageflip, bool, 0400,
157 "Force enable atomic functionality on platforms that don't have full support yet.");
159 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
160 i915_param_named_unsafe(edp_vswing, int, 0400,
161 "Ignore/Override vswing pre-emph table selection from VBT "
162 "(0=use value from vbt [default], 1=low power swing(200mV),"
163 "2=default swing(400mV))");
165 i915_param_named_unsafe(enable_guc_loading, int, 0400,
166 "Enable GuC firmware loading "
167 "(-1=auto, 0=never [default], 1=if available, 2=required)");
169 i915_param_named_unsafe(enable_guc_submission, int, 0400,
170 "Enable GuC submission "
171 "(-1=auto, 0=never [default], 1=if available, 2=required)");
173 i915_param_named(guc_log_level, int, 0400,
174 "GuC firmware logging level (-1:disabled (default), 0-3:enabled)");
176 i915_param_named_unsafe(guc_firmware_path, charp, 0400,
177 "GuC firmware path to use instead of the default one");
179 i915_param_named_unsafe(huc_firmware_path, charp, 0400,
180 "HuC firmware path to use instead of the default one");
182 i915_param_named_unsafe(enable_dp_mst, bool, 0600,
183 "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
185 i915_param_named_unsafe(inject_load_failure, uint, 0400,
186 "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
188 i915_param_named(enable_dpcd_backlight, bool, 0600,
189 "Enable support for DPCD backlight control (default:false)");
191 i915_param_named(enable_gvt, bool, 0400,
192 "Enable support for Intel GVT-g graphics virtualization host support(default:false)");