1 /*
2  * Copyright © 2015 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 "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice (including the next
12  * paragraph) shall be included in all copies or substantial portions of the
13  * Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21  * IN THE SOFTWARE.
22  *
23  */
24 
25 #ifndef _I915_PARAMS_H_
26 #define _I915_PARAMS_H_
27 
28 #include <linux/bitops.h>
29 #include <linux/cache.h> /* for __read_mostly */
30 
31 struct drm_printer;
32 
33 #define ENABLE_GUC_SUBMISSION		BIT(0)
34 #define ENABLE_GUC_LOAD_HUC		BIT(1)
35 #define ENABLE_GUC_MASK			GENMASK(1, 0)
36 
37 /*
38  * Invoke param, a function-like macro, for each i915 param, with arguments:
39  *
40  * param(type, name, value, mode)
41  *
42  * type: parameter type, one of {bool, int, unsigned int, unsigned long, char *}
43  * name: name of the parameter
44  * value: initial/default value of the parameter
45  * mode: debugfs file permissions, one of {0400, 0600, 0}, use 0 to not create
46  *       debugfs file
47  */
48 #define I915_PARAMS_FOR_EACH(param) \
49 	param(char *, vbt_firmware, NULL, 0400) \
50 	param(int, modeset, -1, 0400) \
51 	param(int, lvds_channel_mode, 0, 0400) \
52 	param(int, panel_use_ssc, -1, 0600) \
53 	param(int, vbt_sdvo_panel_type, -1, 0400) \
54 	param(int, enable_dc, -1, 0400) \
55 	param(int, enable_fbc, -1, 0600) \
56 	param(int, enable_psr, -1, 0600) \
57 	param(bool, psr_safest_params, false, 0400) \
58 	param(bool, enable_psr2_sel_fetch, true, 0400) \
59 	param(int, disable_power_well, -1, 0400) \
60 	param(int, enable_ips, 1, 0600) \
61 	param(int, invert_brightness, 0, 0600) \
62 	param(int, enable_guc, -1, 0400) \
63 	param(int, guc_log_level, -1, 0400) \
64 	param(char *, guc_firmware_path, NULL, 0400) \
65 	param(char *, huc_firmware_path, NULL, 0400) \
66 	param(char *, dmc_firmware_path, NULL, 0400) \
67 	param(bool, memtest, false, 0400) \
68 	param(int, mmio_debug, -IS_ENABLED(CONFIG_DRM_I915_DEBUG_MMIO), 0600) \
69 	param(int, edp_vswing, 0, 0400) \
70 	param(unsigned int, reset, 3, 0600) \
71 	param(unsigned int, inject_probe_failure, 0, 0) \
72 	param(int, fastboot, -1, 0600) \
73 	param(int, enable_dpcd_backlight, -1, 0600) \
74 	param(char *, force_probe, CONFIG_DRM_I915_FORCE_PROBE, 0400) \
75 	param(unsigned int, request_timeout_ms, CONFIG_DRM_I915_REQUEST_TIMEOUT, CONFIG_DRM_I915_REQUEST_TIMEOUT ? 0600 : 0) \
76 	param(unsigned int, lmem_size, 0, 0400) \
77 	param(unsigned int, lmem_bar_size, 0, 0400) \
78 	/* leave bools at the end to not create holes */ \
79 	param(bool, enable_hangcheck, true, 0600) \
80 	param(bool, load_detect_test, false, 0600) \
81 	param(bool, force_reset_modeset_test, false, 0600) \
82 	param(bool, error_capture, true, IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR) ? 0600 : 0) \
83 	param(bool, disable_display, false, 0400) \
84 	param(bool, verbose_state_checks, true, 0) \
85 	param(bool, nuclear_pageflip, false, 0400) \
86 	param(bool, enable_dp_mst, true, 0600) \
87 	param(bool, enable_gvt, false, IS_ENABLED(CONFIG_DRM_I915_GVT) ? 0400 : 0)
88 
89 #define MEMBER(T, member, ...) T member;
90 struct i915_params {
91 	I915_PARAMS_FOR_EACH(MEMBER);
92 };
93 #undef MEMBER
94 
95 extern struct i915_params i915_modparams __read_mostly;
96 
97 void i915_params_dump(const struct i915_params *params, struct drm_printer *p);
98 void i915_params_copy(struct i915_params *dest, const struct i915_params *src);
99 void i915_params_free(struct i915_params *params);
100 
101 #endif
102