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i915_params.c revision 1.2.32.1
      1 /*	$NetBSD: i915_params.c,v 1.2.32.1 2019/06/10 22:08:05 christos Exp $	*/
      2 
      3 /*
      4  * Copyright  2014 Intel Corporation
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the
      8  * "Software"), to deal in the Software without restriction, including
      9  * without limitation the rights to use, copy, modify, merge, publish,
     10  * distribute, sub license, and/or sell copies of the Software, and to
     11  * permit persons to whom the Software is furnished to do so, subject to
     12  * the following conditions:
     13  *
     14  * The above copyright notice and this permission notice (including the
     15  * next paragraph) shall be included in all copies or substantial portions
     16  * of the Software.
     17  *
     18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     23  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
     24  * IN THE SOFTWARE.
     25  */
     26 
     27 #include <sys/cdefs.h>
     28 __KERNEL_RCSID(0, "$NetBSD: i915_params.c,v 1.2.32.1 2019/06/10 22:08:05 christos Exp $");
     29 
     30 #include <linux/module.h>
     31 #include <linux/moduleparam.h>
     32 #include "i915_drv.h"
     33 
     34 struct i915_params i915 __read_mostly = {
     35 	.modeset = -1,
     36 	.panel_ignore_lid = 1,
     37 	.semaphores = -1,
     38 	.lvds_channel_mode = 0,
     39 	.panel_use_ssc = -1,
     40 	.vbt_sdvo_panel_type = -1,
     41 	.enable_rc6 = -1,
     42 	.enable_fbc = -1,
     43 	.enable_execlists = -1,
     44 	.enable_hangcheck = true,
     45 	.enable_ppgtt = -1,
     46 	.enable_psr = 0,
     47 	.preliminary_hw_support = IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT),
     48 	.disable_power_well = -1,
     49 	.enable_ips = 1,
     50 	.fastboot = 0,
     51 	.prefault_disable = 0,
     52 	.load_detect_test = 0,
     53 	.reset = true,
     54 	.invert_brightness = 0,
     55 	.disable_display = 0,
     56 	.enable_cmd_parser = 1,
     57 	.disable_vtd_wa = 0,
     58 	.use_mmio_flip = 0,
     59 	.mmio_debug = 0,
     60 	.verbose_state_checks = 1,
     61 	.nuclear_pageflip = 0,
     62 	.edp_vswing = 0,
     63 	.enable_guc_submission = false,
     64 	.guc_log_level = -1,
     65 };
     66 
     67 module_param_named(modeset, i915.modeset, int, 0400);
     68 MODULE_PARM_DESC(modeset,
     69 	"Use kernel modesetting [KMS] (0=disable, "
     70 	"1=on, -1=force vga console preference [default])");
     71 
     72 module_param_named_unsafe(panel_ignore_lid, i915.panel_ignore_lid, int, 0600);
     73 MODULE_PARM_DESC(panel_ignore_lid,
     74 	"Override lid status (0=autodetect, 1=autodetect disabled [default], "
     75 	"-1=force lid closed, -2=force lid open)");
     76 
     77 module_param_named_unsafe(semaphores, i915.semaphores, int, 0400);
     78 MODULE_PARM_DESC(semaphores,
     79 	"Use semaphores for inter-ring sync "
     80 	"(default: -1 (use per-chip defaults))");
     81 
     82 module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400);
     83 MODULE_PARM_DESC(enable_rc6,
     84 	"Enable power-saving render C-state 6. "
     85 	"Different stages can be selected via bitmask values "
     86 	"(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
     87 	"For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
     88 	"default: -1 (use per-chip default)");
     89 
     90 module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600);
     91 MODULE_PARM_DESC(enable_fbc,
     92 	"Enable frame buffer compression for power savings "
     93 	"(default: -1 (use per-chip default))");
     94 
     95 module_param_named_unsafe(lvds_channel_mode, i915.lvds_channel_mode, int, 0600);
     96 MODULE_PARM_DESC(lvds_channel_mode,
     97 	 "Specify LVDS channel mode "
     98 	 "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
     99 
    100 module_param_named_unsafe(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
    101 MODULE_PARM_DESC(lvds_use_ssc,
    102 	"Use Spread Spectrum Clock with panels [LVDS/eDP] "
    103 	"(default: auto from VBT)");
    104 
    105 module_param_named_unsafe(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0600);
    106 MODULE_PARM_DESC(vbt_sdvo_panel_type,
    107 	"Override/Ignore selection of SDVO panel mode in the VBT "
    108 	"(-2=ignore, -1=auto [default], index in VBT BIOS table)");
    109 
    110 module_param_named_unsafe(reset, i915.reset, bool, 0600);
    111 MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
    112 
    113 module_param_named_unsafe(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
    114 MODULE_PARM_DESC(enable_hangcheck,
    115 	"Periodically check GPU activity for detecting hangs. "
    116 	"WARNING: Disabling this can cause system wide hangs. "
    117 	"(default: true)");
    118 
    119 module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400);
    120 MODULE_PARM_DESC(enable_ppgtt,
    121 	"Override PPGTT usage. "
    122 	"(-1=auto [default], 0=disabled, 1=aliasing, 2=full)");
    123 
    124 module_param_named_unsafe(enable_execlists, i915.enable_execlists, int, 0400);
    125 MODULE_PARM_DESC(enable_execlists,
    126 	"Override execlists usage. "
    127 	"(-1=auto [default], 0=disabled, 1=enabled)");
    128 
    129 module_param_named_unsafe(enable_psr, i915.enable_psr, int, 0600);
    130 MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)");
    131 
    132 module_param_named_unsafe(preliminary_hw_support, i915.preliminary_hw_support, int, 0600);
    133 MODULE_PARM_DESC(preliminary_hw_support,
    134 	"Enable preliminary hardware support.");
    135 
    136 module_param_named_unsafe(disable_power_well, i915.disable_power_well, int, 0600);
    137 MODULE_PARM_DESC(disable_power_well,
    138 	"Disable display power wells when possible "
    139 	"(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
    140 
    141 module_param_named_unsafe(enable_ips, i915.enable_ips, int, 0600);
    142 MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
    143 
    144 module_param_named(fastboot, i915.fastboot, bool, 0600);
    145 MODULE_PARM_DESC(fastboot,
    146 	"Try to skip unnecessary mode sets at boot time (default: false)");
    147 
    148 module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600);
    149 MODULE_PARM_DESC(prefault_disable,
    150 	"Disable page prefaulting for pread/pwrite/reloc (default:false). "
    151 	"For developers only.");
    152 
    153 module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600);
    154 MODULE_PARM_DESC(load_detect_test,
    155 	"Force-enable the VGA load detect code for testing (default:false). "
    156 	"For developers only.");
    157 
    158 module_param_named_unsafe(invert_brightness, i915.invert_brightness, int, 0600);
    159 MODULE_PARM_DESC(invert_brightness,
    160 	"Invert backlight brightness "
    161 	"(-1 force normal, 0 machine defaults, 1 force inversion), please "
    162 	"report PCI device ID, subsystem vendor and subsystem device ID "
    163 	"to dri-devel (at) lists.freedesktop.org, if your machine needs it. "
    164 	"It will then be included in an upcoming module version.");
    165 
    166 module_param_named(disable_display, i915.disable_display, bool, 0600);
    167 MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
    168 
    169 module_param_named_unsafe(disable_vtd_wa, i915.disable_vtd_wa, bool, 0600);
    170 MODULE_PARM_DESC(disable_vtd_wa, "Disable all VT-d workarounds (default: false)");
    171 
    172 module_param_named_unsafe(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
    173 MODULE_PARM_DESC(enable_cmd_parser,
    174 		 "Enable command parsing (1=enabled [default], 0=disabled)");
    175 
    176 module_param_named_unsafe(use_mmio_flip, i915.use_mmio_flip, int, 0600);
    177 MODULE_PARM_DESC(use_mmio_flip,
    178 		 "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
    179 
    180 module_param_named(mmio_debug, i915.mmio_debug, int, 0600);
    181 MODULE_PARM_DESC(mmio_debug,
    182 	"Enable the MMIO debug code for the first N failures (default: off). "
    183 	"This may negatively affect performance.");
    184 
    185 module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600);
    186 MODULE_PARM_DESC(verbose_state_checks,
    187 	"Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
    188 
    189 module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0600);
    190 MODULE_PARM_DESC(nuclear_pageflip,
    191 		 "Force atomic modeset functionality; asynchronous mode is not yet supported. (default: false).");
    192 
    193 /* WA to get away with the default setting in VBT for early platforms.Will be removed */
    194 module_param_named_unsafe(edp_vswing, i915.edp_vswing, int, 0400);
    195 MODULE_PARM_DESC(edp_vswing,
    196 		 "Ignore/Override vswing pre-emph table selection from VBT "
    197 		 "(0=use value from vbt [default], 1=low power swing(200mV),"
    198 		 "2=default swing(400mV))");
    199 
    200 module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, bool, 0400);
    201 MODULE_PARM_DESC(enable_guc_submission, "Enable GuC submission (default:false)");
    202 
    203 module_param_named(guc_log_level, i915.guc_log_level, int, 0400);
    204 MODULE_PARM_DESC(guc_log_level,
    205 	"GuC firmware logging level (-1:disabled (default), 0-3:enabled)");
    206