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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 <drm/drm_print.h>
26 : :
27 : : #include "i915_params.h"
28 : : #include "i915_drv.h"
29 : :
30 : : #define i915_param_named(name, T, perm, desc) \
31 : : module_param_named(name, i915_modparams.name, T, perm); \
32 : : MODULE_PARM_DESC(name, desc)
33 : : #define i915_param_named_unsafe(name, T, perm, desc) \
34 : : module_param_named_unsafe(name, i915_modparams.name, T, perm); \
35 : : MODULE_PARM_DESC(name, desc)
36 : :
37 : : struct i915_params i915_modparams __read_mostly = {
38 : : #define MEMBER(T, member, value) .member = (value),
39 : : I915_PARAMS_FOR_EACH(MEMBER)
40 : : #undef MEMBER
41 : : };
42 : :
43 : : i915_param_named(modeset, int, 0400,
44 : : "Use kernel modesetting [KMS] (0=disable, "
45 : : "1=on, -1=force vga console preference [default])");
46 : :
47 : : i915_param_named_unsafe(enable_dc, int, 0400,
48 : : "Enable power-saving display C-states. "
49 : : "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6; "
50 : : "3=up to DC5 with DC3CO; 4=up to DC6 with DC3CO)");
51 : :
52 : : i915_param_named_unsafe(enable_fbc, int, 0600,
53 : : "Enable frame buffer compression for power savings "
54 : : "(default: -1 (use per-chip default))");
55 : :
56 : : i915_param_named_unsafe(lvds_channel_mode, int, 0400,
57 : : "Specify LVDS channel mode "
58 : : "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
59 : :
60 : : i915_param_named_unsafe(panel_use_ssc, int, 0600,
61 : : "Use Spread Spectrum Clock with panels [LVDS/eDP] "
62 : : "(default: auto from VBT)");
63 : :
64 : : i915_param_named_unsafe(vbt_sdvo_panel_type, int, 0400,
65 : : "Override/Ignore selection of SDVO panel mode in the VBT "
66 : : "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
67 : :
68 : : i915_param_named_unsafe(reset, int, 0600,
69 : : "Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])");
70 : :
71 : : i915_param_named_unsafe(vbt_firmware, charp, 0400,
72 : : "Load VBT from specified file under /lib/firmware");
73 : :
74 : : #if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
75 : : i915_param_named(error_capture, bool, 0600,
76 : : "Record the GPU state following a hang. "
77 : : "This information in /sys/class/drm/card<N>/error is vital for "
78 : : "triaging and debugging hangs.");
79 : : #endif
80 : :
81 : : i915_param_named_unsafe(enable_hangcheck, bool, 0600,
82 : : "Periodically check GPU activity for detecting hangs. "
83 : : "WARNING: Disabling this can cause system wide hangs. "
84 : : "(default: true)");
85 : :
86 : : i915_param_named_unsafe(enable_psr, int, 0600,
87 : : "Enable PSR "
88 : : "(0=disabled, 1=enabled) "
89 : : "Default: -1 (use per-chip default)");
90 : :
91 : : i915_param_named_unsafe(force_probe, charp, 0400,
92 : : "Force probe the driver for specified devices. "
93 : : "See CONFIG_DRM_I915_FORCE_PROBE for details.");
94 : :
95 : : i915_param_named_unsafe(alpha_support, bool, 0400,
96 : : "Deprecated. See i915.force_probe.");
97 : :
98 : : i915_param_named_unsafe(disable_power_well, int, 0400,
99 : : "Disable display power wells when possible "
100 : : "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
101 : :
102 : : i915_param_named_unsafe(enable_ips, int, 0600, "Enable IPS (default: true)");
103 : :
104 : : i915_param_named(fastboot, int, 0600,
105 : : "Try to skip unnecessary mode sets at boot time "
106 : : "(0=disabled, 1=enabled) "
107 : : "Default: -1 (use per-chip default)");
108 : :
109 : : i915_param_named_unsafe(prefault_disable, bool, 0600,
110 : : "Disable page prefaulting for pread/pwrite/reloc (default:false). "
111 : : "For developers only.");
112 : :
113 : : i915_param_named_unsafe(load_detect_test, bool, 0600,
114 : : "Force-enable the VGA load detect code for testing (default:false). "
115 : : "For developers only.");
116 : :
117 : : i915_param_named_unsafe(force_reset_modeset_test, bool, 0600,
118 : : "Force a modeset during gpu reset for testing (default:false). "
119 : : "For developers only.");
120 : :
121 : : i915_param_named_unsafe(invert_brightness, int, 0600,
122 : : "Invert backlight brightness "
123 : : "(-1 force normal, 0 machine defaults, 1 force inversion), please "
124 : : "report PCI device ID, subsystem vendor and subsystem device ID "
125 : : "to dri-devel@lists.freedesktop.org, if your machine needs it. "
126 : : "It will then be included in an upcoming module version.");
127 : :
128 : : i915_param_named(disable_display, bool, 0400,
129 : : "Disable display (default: false)");
130 : :
131 : : i915_param_named(mmio_debug, int, 0600,
132 : : "Enable the MMIO debug code for the first N failures (default: off). "
133 : : "This may negatively affect performance.");
134 : :
135 : : i915_param_named(verbose_state_checks, bool, 0600,
136 : : "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
137 : :
138 : : i915_param_named_unsafe(nuclear_pageflip, bool, 0400,
139 : : "Force enable atomic functionality on platforms that don't have full support yet.");
140 : :
141 : : /* WA to get away with the default setting in VBT for early platforms.Will be removed */
142 : : i915_param_named_unsafe(edp_vswing, int, 0400,
143 : : "Ignore/Override vswing pre-emph table selection from VBT "
144 : : "(0=use value from vbt [default], 1=low power swing(200mV),"
145 : : "2=default swing(400mV))");
146 : :
147 : : i915_param_named_unsafe(enable_guc, int, 0400,
148 : : "Enable GuC load for GuC submission and/or HuC load. "
149 : : "Required functionality can be selected using bitmask values. "
150 : : "(-1=auto, 0=disable [default], 1=GuC submission, 2=HuC load)");
151 : :
152 : : i915_param_named(guc_log_level, int, 0400,
153 : : "GuC firmware logging level. Requires GuC to be loaded. "
154 : : "(-1=auto [default], 0=disable, 1..4=enable with verbosity min..max)");
155 : :
156 : : i915_param_named_unsafe(guc_firmware_path, charp, 0400,
157 : : "GuC firmware path to use instead of the default one");
158 : :
159 : : i915_param_named_unsafe(huc_firmware_path, charp, 0400,
160 : : "HuC firmware path to use instead of the default one");
161 : :
162 : : i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
163 : : "DMC firmware path to use instead of the default one");
164 : :
165 : : i915_param_named_unsafe(enable_dp_mst, bool, 0600,
166 : : "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
167 : :
168 : : #if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
169 : : i915_param_named_unsafe(inject_probe_failure, uint, 0400,
170 : : "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
171 : : #endif
172 : :
173 : : i915_param_named(enable_dpcd_backlight, int, 0600,
174 : : "Enable support for DPCD backlight control"
175 : : "(-1=use per-VBT LFP backlight type setting, 0=disabled [default], 1=enabled)");
176 : :
177 : : #if IS_ENABLED(CONFIG_DRM_I915_GVT)
178 : : i915_param_named(enable_gvt, bool, 0400,
179 : : "Enable support for Intel GVT-g graphics virtualization host support(default:false)");
180 : : #endif
181 : :
182 : : #if IS_ENABLED(CONFIG_DRM_I915_UNSTABLE_FAKE_LMEM)
183 : : i915_param_named_unsafe(fake_lmem_start, ulong, 0600,
184 : : "Fake LMEM start offset (default: 0)");
185 : : #endif
186 : :
187 : 0 : static __always_inline void _print_param(struct drm_printer *p,
188 : : const char *name,
189 : : const char *type,
190 : : const void *x)
191 : : {
192 : 0 : if (!__builtin_strcmp(type, "bool"))
193 : 0 : drm_printf(p, "i915.%s=%s\n", name, yesno(*(const bool *)x));
194 : 0 : else if (!__builtin_strcmp(type, "int"))
195 : 0 : drm_printf(p, "i915.%s=%d\n", name, *(const int *)x);
196 : 0 : else if (!__builtin_strcmp(type, "unsigned int"))
197 : 0 : drm_printf(p, "i915.%s=%u\n", name, *(const unsigned int *)x);
198 : 0 : else if (!__builtin_strcmp(type, "unsigned long"))
199 : 0 : drm_printf(p, "i915.%s=%lu\n", name, *(const unsigned long *)x);
200 : 0 : else if (!__builtin_strcmp(type, "char *"))
201 : 0 : drm_printf(p, "i915.%s=%s\n", name, *(const char **)x);
202 : : else
203 : : WARN_ONCE(1, "no printer defined for param type %s (i915.%s)\n",
204 : : type, name);
205 : : }
206 : :
207 : : /**
208 : : * i915_params_dump - dump i915 modparams
209 : : * @params: i915 modparams
210 : : * @p: the &drm_printer
211 : : *
212 : : * Pretty printer for i915 modparams.
213 : : */
214 : 0 : void i915_params_dump(const struct i915_params *params, struct drm_printer *p)
215 : : {
216 : : #define PRINT(T, x, ...) _print_param(p, #x, #T, ¶ms->x);
217 [ # # # # : 0 : I915_PARAMS_FOR_EACH(PRINT);
# # # # #
# # # # #
# # # # #
# # # ]
218 : : #undef PRINT
219 : 0 : }
220 : :
221 : 0 : static __always_inline void dup_param(const char *type, void *x)
222 : : {
223 : 0 : if (!__builtin_strcmp(type, "char *"))
224 : 0 : *(void **)x = kstrdup(*(void **)x, GFP_ATOMIC);
225 : : }
226 : :
227 : 0 : void i915_params_copy(struct i915_params *dest, const struct i915_params *src)
228 : : {
229 : 0 : *dest = *src;
230 : : #define DUP(T, x, ...) dup_param(#T, &dest->x);
231 : 0 : I915_PARAMS_FOR_EACH(DUP);
232 : : #undef DUP
233 : 0 : }
234 : :
235 : 0 : static __always_inline void free_param(const char *type, void *x)
236 : : {
237 : 0 : if (!__builtin_strcmp(type, "char *")) {
238 : 0 : kfree(*(void **)x);
239 : 0 : *(void **)x = NULL;
240 : : }
241 : : }
242 : :
243 : : /* free the allocated members, *not* the passed in params itself */
244 : 0 : void i915_params_free(struct i915_params *params)
245 : : {
246 : : #define FREE(T, x, ...) free_param(#T, ¶ms->x);
247 : 0 : I915_PARAMS_FOR_EACH(FREE);
248 : : #undef FREE
249 : 0 : }
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