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1/*
2 * Copyright © 2014 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sub license, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the
13 * next paragraph) shall be included in all copies or substantial portions
14 * of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25#include "i915_params.h"
26#include "i915_drv.h"
27
28struct i915_params i915 __read_mostly = {
29 .modeset = -1,
30 .panel_ignore_lid = 1,
31 .semaphores = -1,
32 .lvds_channel_mode = 0,
33 .panel_use_ssc = -1,
34 .vbt_sdvo_panel_type = -1,
35 .enable_rc6 = -1,
36 .enable_dc = -1,
37 .enable_fbc = -1,
38 .enable_execlists = -1,
39 .enable_hangcheck = true,
40 .enable_ppgtt = -1,
41 .enable_psr = -1,
42 .preliminary_hw_support = IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT),
43 .disable_power_well = -1,
44 .enable_ips = 1,
45 .fastboot = 0,
46 .prefault_disable = 0,
47 .load_detect_test = 0,
48 .reset = true,
49 .invert_brightness = 0,
50 .disable_display = 0,
51 .enable_cmd_parser = 1,
52 .use_mmio_flip = 0,
53 .mmio_debug = 0,
54 .verbose_state_checks = 1,
55 .nuclear_pageflip = 0,
56 .edp_vswing = 0,
57 .enable_guc_submission = false,
58 .guc_log_level = -1,
59};
60
61module_param_named(modeset, i915.modeset, int, 0400);
62MODULE_PARM_DESC(modeset,
63 "Use kernel modesetting [KMS] (0=disable, "
64 "1=on, -1=force vga console preference [default])");
65
66module_param_named_unsafe(panel_ignore_lid, i915.panel_ignore_lid, int, 0600);
67MODULE_PARM_DESC(panel_ignore_lid,
68 "Override lid status (0=autodetect, 1=autodetect disabled [default], "
69 "-1=force lid closed, -2=force lid open)");
70
71module_param_named_unsafe(semaphores, i915.semaphores, int, 0400);
72MODULE_PARM_DESC(semaphores,
73 "Use semaphores for inter-ring sync "
74 "(default: -1 (use per-chip defaults))");
75
76module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400);
77MODULE_PARM_DESC(enable_rc6,
78 "Enable power-saving render C-state 6. "
79 "Different stages can be selected via bitmask values "
80 "(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
81 "For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
82 "default: -1 (use per-chip default)");
83
84module_param_named_unsafe(enable_dc, i915.enable_dc, int, 0400);
85MODULE_PARM_DESC(enable_dc,
86 "Enable power-saving display C-states. "
87 "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6)");
88
89module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600);
90MODULE_PARM_DESC(enable_fbc,
91 "Enable frame buffer compression for power savings "
92 "(default: -1 (use per-chip default))");
93
94module_param_named_unsafe(lvds_channel_mode, i915.lvds_channel_mode, int, 0400);
95MODULE_PARM_DESC(lvds_channel_mode,
96 "Specify LVDS channel mode "
97 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
98
99module_param_named_unsafe(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
100MODULE_PARM_DESC(lvds_use_ssc,
101 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
102 "(default: auto from VBT)");
103
104module_param_named_unsafe(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0400);
105MODULE_PARM_DESC(vbt_sdvo_panel_type,
106 "Override/Ignore selection of SDVO panel mode in the VBT "
107 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
108
109module_param_named_unsafe(reset, i915.reset, bool, 0600);
110MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
111
112module_param_named_unsafe(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
113MODULE_PARM_DESC(enable_hangcheck,
114 "Periodically check GPU activity for detecting hangs. "
115 "WARNING: Disabling this can cause system wide hangs. "
116 "(default: true)");
117
118module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400);
119MODULE_PARM_DESC(enable_ppgtt,
120 "Override PPGTT usage. "
121 "(-1=auto [default], 0=disabled, 1=aliasing, 2=full, 3=full with extended address space)");
122
123module_param_named_unsafe(enable_execlists, i915.enable_execlists, int, 0400);
124MODULE_PARM_DESC(enable_execlists,
125 "Override execlists usage. "
126 "(-1=auto [default], 0=disabled, 1=enabled)");
127
128module_param_named_unsafe(enable_psr, i915.enable_psr, int, 0600);
129MODULE_PARM_DESC(enable_psr, "Enable PSR "
130 "(0=disabled, 1=enabled - link mode chosen per-platform, 2=force link-standby mode, 3=force link-off mode) "
131 "Default: -1 (use per-chip default)");
132
133module_param_named_unsafe(preliminary_hw_support, i915.preliminary_hw_support, int, 0400);
134MODULE_PARM_DESC(preliminary_hw_support,
135 "Enable preliminary hardware support.");
136
137module_param_named_unsafe(disable_power_well, i915.disable_power_well, int, 0400);
138MODULE_PARM_DESC(disable_power_well,
139 "Disable display power wells when possible "
140 "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
141
142module_param_named_unsafe(enable_ips, i915.enable_ips, int, 0600);
143MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
144
145module_param_named(fastboot, i915.fastboot, bool, 0600);
146MODULE_PARM_DESC(fastboot,
147 "Try to skip unnecessary mode sets at boot time (default: false)");
148
149module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600);
150MODULE_PARM_DESC(prefault_disable,
151 "Disable page prefaulting for pread/pwrite/reloc (default:false). "
152 "For developers only.");
153
154module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600);
155MODULE_PARM_DESC(load_detect_test,
156 "Force-enable the VGA load detect code for testing (default:false). "
157 "For developers only.");
158
159module_param_named_unsafe(invert_brightness, i915.invert_brightness, int, 0600);
160MODULE_PARM_DESC(invert_brightness,
161 "Invert backlight brightness "
162 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
163 "report PCI device ID, subsystem vendor and subsystem device ID "
164 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
165 "It will then be included in an upcoming module version.");
166
167module_param_named(disable_display, i915.disable_display, bool, 0400);
168MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
169
170module_param_named_unsafe(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
171MODULE_PARM_DESC(enable_cmd_parser,
172 "Enable command parsing (1=enabled [default], 0=disabled)");
173
174module_param_named_unsafe(use_mmio_flip, i915.use_mmio_flip, int, 0600);
175MODULE_PARM_DESC(use_mmio_flip,
176 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
177
178module_param_named(mmio_debug, i915.mmio_debug, int, 0600);
179MODULE_PARM_DESC(mmio_debug,
180 "Enable the MMIO debug code for the first N failures (default: off). "
181 "This may negatively affect performance.");
182
183module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600);
184MODULE_PARM_DESC(verbose_state_checks,
185 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
186
187module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0600);
188MODULE_PARM_DESC(nuclear_pageflip,
189 "Force atomic modeset functionality; asynchronous mode is not yet supported. (default: false).");
190
191/* WA to get away with the default setting in VBT for early platforms.Will be removed */
192module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400);
193MODULE_PARM_DESC(edp_vswing,
194 "Ignore/Override vswing pre-emph table selection from VBT "
195 "(0=use value from vbt [default], 1=low power swing(200mV),"
196 "2=default swing(400mV))");
197
198module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, bool, 0400);
199MODULE_PARM_DESC(enable_guc_submission, "Enable GuC submission (default:false)");
200
201module_param_named(guc_log_level, i915.guc_log_level, int, 0400);
202MODULE_PARM_DESC(guc_log_level,
203 "GuC firmware logging level (-1:disabled (default), 0-3:enabled)");
1/*
2 * Copyright © 2014 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sub license, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the
13 * next paragraph) shall be included in all copies or substantial portions
14 * of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25#include <linux/string_helpers.h>
26
27#include <drm/drm_print.h>
28
29#include "i915_params.h"
30#include "i915_drv.h"
31
32DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0,
33 "DRM_UT_CORE",
34 "DRM_UT_DRIVER",
35 "DRM_UT_KMS",
36 "DRM_UT_PRIME",
37 "DRM_UT_ATOMIC",
38 "DRM_UT_VBL",
39 "DRM_UT_STATE",
40 "DRM_UT_LEASE",
41 "DRM_UT_DP",
42 "DRM_UT_DRMRES");
43
44#define i915_param_named(name, T, perm, desc) \
45 module_param_named(name, i915_modparams.name, T, perm); \
46 MODULE_PARM_DESC(name, desc)
47#define i915_param_named_unsafe(name, T, perm, desc) \
48 module_param_named_unsafe(name, i915_modparams.name, T, perm); \
49 MODULE_PARM_DESC(name, desc)
50
51struct i915_params i915_modparams __read_mostly = {
52#define MEMBER(T, member, value, ...) .member = (value),
53 I915_PARAMS_FOR_EACH(MEMBER)
54#undef MEMBER
55};
56
57/*
58 * Note: As a rule, keep module parameter sysfs permissions read-only
59 * 0400. Runtime changes are only supported through i915 debugfs.
60 *
61 * For any exceptions requiring write access and runtime changes through module
62 * parameter sysfs, prevent debugfs file creation by setting the parameter's
63 * debugfs mode to 0.
64 */
65
66i915_param_named(modeset, int, 0400,
67 "Use kernel modesetting [KMS] (0=disable, "
68 "1=on, -1=force vga console preference [default])");
69
70i915_param_named_unsafe(enable_dc, int, 0400,
71 "Enable power-saving display C-states. "
72 "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6; "
73 "3=up to DC5 with DC3CO; 4=up to DC6 with DC3CO)");
74
75i915_param_named_unsafe(enable_fbc, int, 0400,
76 "Enable frame buffer compression for power savings "
77 "(default: -1 (use per-chip default))");
78
79i915_param_named_unsafe(lvds_channel_mode, int, 0400,
80 "Specify LVDS channel mode "
81 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
82
83i915_param_named_unsafe(panel_use_ssc, int, 0400,
84 "Use Spread Spectrum Clock with panels [LVDS/eDP] "
85 "(default: auto from VBT)");
86
87i915_param_named_unsafe(vbt_sdvo_panel_type, int, 0400,
88 "Override/Ignore selection of SDVO panel mode in the VBT "
89 "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
90
91i915_param_named_unsafe(reset, uint, 0400,
92 "Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])");
93
94i915_param_named_unsafe(vbt_firmware, charp, 0400,
95 "Load VBT from specified file under /lib/firmware");
96
97#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
98i915_param_named(error_capture, bool, 0400,
99 "Record the GPU state following a hang. "
100 "This information in /sys/class/drm/card<N>/error is vital for "
101 "triaging and debugging hangs.");
102#endif
103
104i915_param_named_unsafe(enable_hangcheck, bool, 0400,
105 "Periodically check GPU activity for detecting hangs. "
106 "WARNING: Disabling this can cause system wide hangs. "
107 "(default: true)");
108
109i915_param_named_unsafe(enable_psr, int, 0400,
110 "Enable PSR "
111 "(0=disabled, 1=enable up to PSR1, 2=enable up to PSR2) "
112 "Default: -1 (use per-chip default)");
113
114i915_param_named(psr_safest_params, bool, 0400,
115 "Replace PSR VBT parameters by the safest and not optimal ones. This "
116 "is helpful to detect if PSR issues are related to bad values set in "
117 " VBT. (0=use VBT parameters, 1=use safest parameters)");
118
119i915_param_named_unsafe(enable_psr2_sel_fetch, bool, 0400,
120 "Enable PSR2 selective fetch "
121 "(0=disabled, 1=enabled) "
122 "Default: 0");
123
124i915_param_named_unsafe(force_probe, charp, 0400,
125 "Force probe the driver for specified devices. "
126 "See CONFIG_DRM_I915_FORCE_PROBE for details.");
127
128i915_param_named_unsafe(disable_power_well, int, 0400,
129 "Disable display power wells when possible "
130 "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
131
132i915_param_named_unsafe(enable_ips, int, 0400, "Enable IPS (default: true)");
133
134i915_param_named(fastboot, int, 0400,
135 "Try to skip unnecessary mode sets at boot time "
136 "(0=disabled, 1=enabled) "
137 "Default: -1 (use per-chip default)");
138
139i915_param_named_unsafe(load_detect_test, bool, 0400,
140 "Force-enable the VGA load detect code for testing (default:false). "
141 "For developers only.");
142
143i915_param_named_unsafe(force_reset_modeset_test, bool, 0400,
144 "Force a modeset during gpu reset for testing (default:false). "
145 "For developers only.");
146
147i915_param_named_unsafe(invert_brightness, int, 0400,
148 "Invert backlight brightness "
149 "(-1 force normal, 0 machine defaults, 1 force inversion), please "
150 "report PCI device ID, subsystem vendor and subsystem device ID "
151 "to dri-devel@lists.freedesktop.org, if your machine needs it. "
152 "It will then be included in an upcoming module version.");
153
154i915_param_named(disable_display, bool, 0400,
155 "Disable display (default: false)");
156
157i915_param_named(memtest, bool, 0400,
158 "Perform a read/write test of all device memory on module load (default: off)");
159
160i915_param_named(mmio_debug, int, 0400,
161 "Enable the MMIO debug code for the first N failures (default: off). "
162 "This may negatively affect performance.");
163
164/* Special case writable file */
165i915_param_named(verbose_state_checks, bool, 0600,
166 "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
167
168i915_param_named_unsafe(nuclear_pageflip, bool, 0400,
169 "Force enable atomic functionality on platforms that don't have full support yet.");
170
171/* WA to get away with the default setting in VBT for early platforms.Will be removed */
172i915_param_named_unsafe(edp_vswing, int, 0400,
173 "Ignore/Override vswing pre-emph table selection from VBT "
174 "(0=use value from vbt [default], 1=low power swing(200mV),"
175 "2=default swing(400mV))");
176
177i915_param_named_unsafe(enable_guc, int, 0400,
178 "Enable GuC load for GuC submission and/or HuC load. "
179 "Required functionality can be selected using bitmask values. "
180 "(-1=auto [default], 0=disable, 1=GuC submission, 2=HuC load)");
181
182i915_param_named(guc_log_level, int, 0400,
183 "GuC firmware logging level. Requires GuC to be loaded. "
184 "(-1=auto [default], 0=disable, 1..4=enable with verbosity min..max)");
185
186i915_param_named_unsafe(guc_firmware_path, charp, 0400,
187 "GuC firmware path to use instead of the default one");
188
189i915_param_named_unsafe(huc_firmware_path, charp, 0400,
190 "HuC firmware path to use instead of the default one");
191
192i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
193 "DMC firmware path to use instead of the default one");
194
195i915_param_named_unsafe(enable_dp_mst, bool, 0400,
196 "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
197
198#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
199i915_param_named_unsafe(inject_probe_failure, uint, 0400,
200 "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
201#endif
202
203i915_param_named(enable_dpcd_backlight, int, 0400,
204 "Enable support for DPCD backlight control"
205 "(-1=use per-VBT LFP backlight type setting [default], 0=disabled, 1=enable, 2=force VESA interface, 3=force Intel interface)");
206
207#if IS_ENABLED(CONFIG_DRM_I915_GVT)
208i915_param_named(enable_gvt, bool, 0400,
209 "Enable support for Intel GVT-g graphics virtualization host support(default:false)");
210#endif
211
212#if CONFIG_DRM_I915_REQUEST_TIMEOUT
213i915_param_named_unsafe(request_timeout_ms, uint, 0600,
214 "Default request/fence/batch buffer expiration timeout.");
215#endif
216
217i915_param_named_unsafe(lmem_size, uint, 0400,
218 "Set the lmem size(in MiB) for each region. (default: 0, all memory)");
219i915_param_named_unsafe(lmem_bar_size, uint, 0400,
220 "Set the lmem bar size(in MiB).");
221
222static __always_inline void _print_param(struct drm_printer *p,
223 const char *name,
224 const char *type,
225 const void *x)
226{
227 if (!__builtin_strcmp(type, "bool"))
228 drm_printf(p, "i915.%s=%s\n", name,
229 str_yes_no(*(const bool *)x));
230 else if (!__builtin_strcmp(type, "int"))
231 drm_printf(p, "i915.%s=%d\n", name, *(const int *)x);
232 else if (!__builtin_strcmp(type, "unsigned int"))
233 drm_printf(p, "i915.%s=%u\n", name, *(const unsigned int *)x);
234 else if (!__builtin_strcmp(type, "unsigned long"))
235 drm_printf(p, "i915.%s=%lu\n", name, *(const unsigned long *)x);
236 else if (!__builtin_strcmp(type, "char *"))
237 drm_printf(p, "i915.%s=%s\n", name, *(const char **)x);
238 else
239 WARN_ONCE(1, "no printer defined for param type %s (i915.%s)\n",
240 type, name);
241}
242
243/**
244 * i915_params_dump - dump i915 modparams
245 * @params: i915 modparams
246 * @p: the &drm_printer
247 *
248 * Pretty printer for i915 modparams.
249 */
250void i915_params_dump(const struct i915_params *params, struct drm_printer *p)
251{
252#define PRINT(T, x, ...) _print_param(p, #x, #T, ¶ms->x);
253 I915_PARAMS_FOR_EACH(PRINT);
254#undef PRINT
255}
256
257static __always_inline void dup_param(const char *type, void *x)
258{
259 if (!__builtin_strcmp(type, "char *"))
260 *(void **)x = kstrdup(*(void **)x, GFP_ATOMIC);
261}
262
263void i915_params_copy(struct i915_params *dest, const struct i915_params *src)
264{
265 *dest = *src;
266#define DUP(T, x, ...) dup_param(#T, &dest->x);
267 I915_PARAMS_FOR_EACH(DUP);
268#undef DUP
269}
270
271static __always_inline void free_param(const char *type, void *x)
272{
273 if (!__builtin_strcmp(type, "char *")) {
274 kfree(*(void **)x);
275 *(void **)x = NULL;
276 }
277}
278
279/* free the allocated members, *not* the passed in params itself */
280void i915_params_free(struct i915_params *params)
281{
282#define FREE(T, x, ...) free_param(#T, ¶ms->x);
283 I915_PARAMS_FOR_EACH(FREE);
284#undef FREE
285}