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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/gpu/drm/i915/i915_params.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_params.c')
-rw-r--r--drivers/gpu/drm/i915/i915_params.c285
1 files changed, 285 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c
new file mode 100644
index 000000000..5b24dd50f
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_params.c
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+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <linux/string_helpers.h>
+
+#include <drm/drm_print.h>
+
+#include "i915_params.h"
+#include "i915_drv.h"
+
+DECLARE_DYNDBG_CLASSMAP(drm_debug_classes, DD_CLASS_TYPE_DISJOINT_BITS, 0,
+ "DRM_UT_CORE",
+ "DRM_UT_DRIVER",
+ "DRM_UT_KMS",
+ "DRM_UT_PRIME",
+ "DRM_UT_ATOMIC",
+ "DRM_UT_VBL",
+ "DRM_UT_STATE",
+ "DRM_UT_LEASE",
+ "DRM_UT_DP",
+ "DRM_UT_DRMRES");
+
+#define i915_param_named(name, T, perm, desc) \
+ module_param_named(name, i915_modparams.name, T, perm); \
+ MODULE_PARM_DESC(name, desc)
+#define i915_param_named_unsafe(name, T, perm, desc) \
+ module_param_named_unsafe(name, i915_modparams.name, T, perm); \
+ MODULE_PARM_DESC(name, desc)
+
+struct i915_params i915_modparams __read_mostly = {
+#define MEMBER(T, member, value, ...) .member = (value),
+ I915_PARAMS_FOR_EACH(MEMBER)
+#undef MEMBER
+};
+
+/*
+ * Note: As a rule, keep module parameter sysfs permissions read-only
+ * 0400. Runtime changes are only supported through i915 debugfs.
+ *
+ * For any exceptions requiring write access and runtime changes through module
+ * parameter sysfs, prevent debugfs file creation by setting the parameter's
+ * debugfs mode to 0.
+ */
+
+i915_param_named(modeset, int, 0400,
+ "Use kernel modesetting [KMS] (0=disable, "
+ "1=on, -1=force vga console preference [default])");
+
+i915_param_named_unsafe(enable_dc, int, 0400,
+ "Enable power-saving display C-states. "
+ "(-1=auto [default]; 0=disable; 1=up to DC5; 2=up to DC6; "
+ "3=up to DC5 with DC3CO; 4=up to DC6 with DC3CO)");
+
+i915_param_named_unsafe(enable_fbc, int, 0400,
+ "Enable frame buffer compression for power savings "
+ "(default: -1 (use per-chip default))");
+
+i915_param_named_unsafe(lvds_channel_mode, int, 0400,
+ "Specify LVDS channel mode "
+ "(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
+
+i915_param_named_unsafe(panel_use_ssc, int, 0400,
+ "Use Spread Spectrum Clock with panels [LVDS/eDP] "
+ "(default: auto from VBT)");
+
+i915_param_named_unsafe(vbt_sdvo_panel_type, int, 0400,
+ "Override/Ignore selection of SDVO panel mode in the VBT "
+ "(-2=ignore, -1=auto [default], index in VBT BIOS table)");
+
+i915_param_named_unsafe(reset, uint, 0400,
+ "Attempt GPU resets (0=disabled, 1=full gpu reset, 2=engine reset [default])");
+
+i915_param_named_unsafe(vbt_firmware, charp, 0400,
+ "Load VBT from specified file under /lib/firmware");
+
+#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
+i915_param_named(error_capture, bool, 0400,
+ "Record the GPU state following a hang. "
+ "This information in /sys/class/drm/card<N>/error is vital for "
+ "triaging and debugging hangs.");
+#endif
+
+i915_param_named_unsafe(enable_hangcheck, bool, 0400,
+ "Periodically check GPU activity for detecting hangs. "
+ "WARNING: Disabling this can cause system wide hangs. "
+ "(default: true)");
+
+i915_param_named_unsafe(enable_psr, int, 0400,
+ "Enable PSR "
+ "(0=disabled, 1=enable up to PSR1, 2=enable up to PSR2) "
+ "Default: -1 (use per-chip default)");
+
+i915_param_named(psr_safest_params, bool, 0400,
+ "Replace PSR VBT parameters by the safest and not optimal ones. This "
+ "is helpful to detect if PSR issues are related to bad values set in "
+ " VBT. (0=use VBT parameters, 1=use safest parameters)");
+
+i915_param_named_unsafe(enable_psr2_sel_fetch, bool, 0400,
+ "Enable PSR2 selective fetch "
+ "(0=disabled, 1=enabled) "
+ "Default: 0");
+
+i915_param_named_unsafe(force_probe, charp, 0400,
+ "Force probe options for specified supported devices. "
+ "See CONFIG_DRM_I915_FORCE_PROBE for details.");
+
+i915_param_named_unsafe(disable_power_well, int, 0400,
+ "Disable display power wells when possible "
+ "(-1=auto [default], 0=power wells always on, 1=power wells disabled when possible)");
+
+i915_param_named_unsafe(enable_ips, int, 0400, "Enable IPS (default: true)");
+
+i915_param_named(fastboot, int, 0400,
+ "Try to skip unnecessary mode sets at boot time "
+ "(0=disabled, 1=enabled) "
+ "Default: -1 (use per-chip default)");
+
+i915_param_named_unsafe(load_detect_test, bool, 0400,
+ "Force-enable the VGA load detect code for testing (default:false). "
+ "For developers only.");
+
+i915_param_named_unsafe(force_reset_modeset_test, bool, 0400,
+ "Force a modeset during gpu reset for testing (default:false). "
+ "For developers only.");
+
+i915_param_named_unsafe(invert_brightness, int, 0400,
+ "Invert backlight brightness "
+ "(-1 force normal, 0 machine defaults, 1 force inversion), please "
+ "report PCI device ID, subsystem vendor and subsystem device ID "
+ "to dri-devel@lists.freedesktop.org, if your machine needs it. "
+ "It will then be included in an upcoming module version.");
+
+i915_param_named(disable_display, bool, 0400,
+ "Disable display (default: false)");
+
+i915_param_named(memtest, bool, 0400,
+ "Perform a read/write test of all device memory on module load (default: off)");
+
+i915_param_named(mmio_debug, int, 0400,
+ "Enable the MMIO debug code for the first N failures (default: off). "
+ "This may negatively affect performance.");
+
+/* Special case writable file */
+i915_param_named(verbose_state_checks, bool, 0600,
+ "Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
+
+i915_param_named_unsafe(nuclear_pageflip, bool, 0400,
+ "Force enable atomic functionality on platforms that don't have full support yet.");
+
+/* WA to get away with the default setting in VBT for early platforms.Will be removed */
+i915_param_named_unsafe(edp_vswing, int, 0400,
+ "Ignore/Override vswing pre-emph table selection from VBT "
+ "(0=use value from vbt [default], 1=low power swing(200mV),"
+ "2=default swing(400mV))");
+
+i915_param_named_unsafe(enable_guc, int, 0400,
+ "Enable GuC load for GuC submission and/or HuC load. "
+ "Required functionality can be selected using bitmask values. "
+ "(-1=auto [default], 0=disable, 1=GuC submission, 2=HuC load)");
+
+i915_param_named(guc_log_level, int, 0400,
+ "GuC firmware logging level. Requires GuC to be loaded. "
+ "(-1=auto [default], 0=disable, 1..4=enable with verbosity min..max)");
+
+i915_param_named_unsafe(guc_firmware_path, charp, 0400,
+ "GuC firmware path to use instead of the default one");
+
+i915_param_named_unsafe(huc_firmware_path, charp, 0400,
+ "HuC firmware path to use instead of the default one");
+
+i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
+ "DMC firmware path to use instead of the default one");
+
+i915_param_named_unsafe(enable_dp_mst, bool, 0400,
+ "Enable multi-stream transport (MST) for new DisplayPort sinks. (default: true)");
+
+#if IS_ENABLED(CONFIG_DRM_I915_DEBUG)
+i915_param_named_unsafe(inject_probe_failure, uint, 0400,
+ "Force an error after a number of failure check points (0:disabled (default), N:force failure at the Nth failure check point)");
+#endif
+
+i915_param_named(enable_dpcd_backlight, int, 0400,
+ "Enable support for DPCD backlight control"
+ "(-1=use per-VBT LFP backlight type setting [default], 0=disabled, 1=enable, 2=force VESA interface, 3=force Intel interface)");
+
+#if IS_ENABLED(CONFIG_DRM_I915_GVT)
+i915_param_named(enable_gvt, bool, 0400,
+ "Enable support for Intel GVT-g graphics virtualization host support(default:false)");
+#endif
+
+#if CONFIG_DRM_I915_REQUEST_TIMEOUT
+i915_param_named_unsafe(request_timeout_ms, uint, 0600,
+ "Default request/fence/batch buffer expiration timeout.");
+#endif
+
+i915_param_named_unsafe(lmem_size, uint, 0400,
+ "Set the lmem size(in MiB) for each region. (default: 0, all memory)");
+i915_param_named_unsafe(lmem_bar_size, uint, 0400,
+ "Set the lmem bar size(in MiB).");
+
+static __always_inline void _print_param(struct drm_printer *p,
+ const char *name,
+ const char *type,
+ const void *x)
+{
+ if (!__builtin_strcmp(type, "bool"))
+ drm_printf(p, "i915.%s=%s\n", name,
+ str_yes_no(*(const bool *)x));
+ else if (!__builtin_strcmp(type, "int"))
+ drm_printf(p, "i915.%s=%d\n", name, *(const int *)x);
+ else if (!__builtin_strcmp(type, "unsigned int"))
+ drm_printf(p, "i915.%s=%u\n", name, *(const unsigned int *)x);
+ else if (!__builtin_strcmp(type, "unsigned long"))
+ drm_printf(p, "i915.%s=%lu\n", name, *(const unsigned long *)x);
+ else if (!__builtin_strcmp(type, "char *"))
+ drm_printf(p, "i915.%s=%s\n", name, *(const char **)x);
+ else
+ WARN_ONCE(1, "no printer defined for param type %s (i915.%s)\n",
+ type, name);
+}
+
+/**
+ * i915_params_dump - dump i915 modparams
+ * @params: i915 modparams
+ * @p: the &drm_printer
+ *
+ * Pretty printer for i915 modparams.
+ */
+void i915_params_dump(const struct i915_params *params, struct drm_printer *p)
+{
+#define PRINT(T, x, ...) _print_param(p, #x, #T, &params->x);
+ I915_PARAMS_FOR_EACH(PRINT);
+#undef PRINT
+}
+
+static __always_inline void dup_param(const char *type, void *x)
+{
+ if (!__builtin_strcmp(type, "char *"))
+ *(void **)x = kstrdup(*(void **)x, GFP_ATOMIC);
+}
+
+void i915_params_copy(struct i915_params *dest, const struct i915_params *src)
+{
+ *dest = *src;
+#define DUP(T, x, ...) dup_param(#T, &dest->x);
+ I915_PARAMS_FOR_EACH(DUP);
+#undef DUP
+}
+
+static __always_inline void free_param(const char *type, void *x)
+{
+ if (!__builtin_strcmp(type, "char *")) {
+ kfree(*(void **)x);
+ *(void **)x = NULL;
+ }
+}
+
+/* free the allocated members, *not* the passed in params itself */
+void i915_params_free(struct i915_params *params)
+{
+#define FREE(T, x, ...) free_param(#T, &params->x);
+ I915_PARAMS_FOR_EACH(FREE);
+#undef FREE
+}