Currently all module parameters are handled by i915_param.c/h. This is a problem for display parameters when Xe driver is used. Add a mechanism to add parameters specific to the display. This is mainly copied from i915_[debugfs]_params.[ch]. Parameters are not yet moved. This is done by subsequent patches.
Signed-off-by: Jouni Högander <[email protected]> --- drivers/gpu/drm/i915/Makefile | 2 + .../gpu/drm/i915/display/intel_display_core.h | 2 + .../drm/i915/display/intel_display_debugfs.c | 2 + .../display/intel_display_debugfs_params.c | 239 ++++++++++++++++++ .../display/intel_display_debugfs_params.h | 14 + .../drm/i915/display/intel_display_device.c | 8 + .../drm/i915/display/intel_display_device.h | 1 + .../drm/i915/display/intel_display_params.c | 95 +++++++ .../drm/i915/display/intel_display_params.h | 58 +++++ drivers/gpu/drm/i915/i915_driver.c | 2 + 10 files changed, 423 insertions(+) create mode 100644 drivers/gpu/drm/i915/display/intel_display_debugfs_params.c create mode 100644 drivers/gpu/drm/i915/display/intel_display_debugfs_params.h create mode 100644 drivers/gpu/drm/i915/display/intel_display_params.c create mode 100644 drivers/gpu/drm/i915/display/intel_display_params.h diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index dec78efa452a..3c26e9ae3722 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -85,6 +85,7 @@ i915-$(CONFIG_DEBUG_FS) += \ i915_debugfs.o \ i915_debugfs_params.o \ display/intel_display_debugfs.o \ + display/intel_display_debugfs_params.o \ display/intel_pipe_crc.o i915-$(CONFIG_PERF_EVENTS) += i915_pmu.o @@ -247,6 +248,7 @@ i915-y += \ display/intel_display.o \ display/intel_display_driver.o \ display/intel_display_irq.o \ + display/intel_display_params.o \ display/intel_display_power.o \ display/intel_display_power_map.o \ display/intel_display_power_well.o \ diff --git a/drivers/gpu/drm/i915/display/intel_display_core.h b/drivers/gpu/drm/i915/display/intel_display_core.h index 53e5c33e08c3..f2c84ae52217 100644 --- a/drivers/gpu/drm/i915/display/intel_display_core.h +++ b/drivers/gpu/drm/i915/display/intel_display_core.h @@ -19,6 +19,7 @@ #include "intel_cdclk.h" #include "intel_display_device.h" #include "intel_display_limits.h" +#include "intel_display_params.h" #include "intel_display_power.h" #include "intel_dpll_mgr.h" #include "intel_fbc.h" @@ -517,6 +518,7 @@ struct intel_display { struct intel_hotplug hotplug; struct intel_opregion opregion; struct intel_overlay *overlay; + struct intel_display_params params; struct intel_vbt_data vbt; struct intel_wm wm; }; diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c index f05b52381a83..e929a8bf0555 100644 --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c @@ -17,6 +17,7 @@ #include "intel_de.h" #include "intel_crtc_state_dump.h" #include "intel_display_debugfs.h" +#include "intel_display_debugfs_params.h" #include "intel_display_power.h" #include "intel_display_power_well.h" #include "intel_display_types.h" @@ -1100,6 +1101,7 @@ void intel_display_debugfs_register(struct drm_i915_private *i915) intel_hpd_debugfs_register(i915); intel_psr_debugfs_register(i915); intel_wm_debugfs_register(i915); + intel_display_debugfs_params(i915); } static int i915_panel_show(struct seq_file *m, void *data) diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs_params.c b/drivers/gpu/drm/i915/display/intel_display_debugfs_params.c new file mode 100644 index 000000000000..62bd61e8ea37 --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs_params.c @@ -0,0 +1,239 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2023 Intel Corporation + */ + +#include <linux/kernel.h> + +#include <drm/drm_drv.h> + +#include "intel_display_debugfs_params.h" +#include "i915_drv.h" +#include "intel_display_params.h" + +/* int param */ +static int intel_display_param_int_show(struct seq_file *m, void *data) +{ + int *value = m->private; + + seq_printf(m, "%d\n", *value); + + return 0; +} + +static int intel_display_param_int_open(struct inode *inode, struct file *file) +{ + return single_open(file, intel_display_param_int_show, inode->i_private); +} + +static ssize_t intel_display_param_int_write(struct file *file, + const char __user *ubuf, size_t len, + loff_t *offp) +{ + struct seq_file *m = file->private_data; + int *value = m->private; + int ret; + + ret = kstrtoint_from_user(ubuf, len, 0, value); + if (ret) { + /* support boolean values too */ + bool b; + + ret = kstrtobool_from_user(ubuf, len, &b); + if (!ret) + *value = b; + } + + return ret ?: len; +} + +static const struct file_operations intel_display_param_int_fops = { + .owner = THIS_MODULE, + .open = intel_display_param_int_open, + .read = seq_read, + .write = intel_display_param_int_write, + .llseek = default_llseek, + .release = single_release, +}; + +static const struct file_operations intel_display_param_int_fops_ro = { + .owner = THIS_MODULE, + .open = intel_display_param_int_open, + .read = seq_read, + .llseek = default_llseek, + .release = single_release, +}; + +/* unsigned int param */ +static int intel_display_param_uint_show(struct seq_file *m, void *data) +{ + unsigned int *value = m->private; + + seq_printf(m, "%u\n", *value); + + return 0; +} + +static int intel_display_param_uint_open(struct inode *inode, struct file *file) +{ + return single_open(file, intel_display_param_uint_show, inode->i_private); +} + +static ssize_t intel_display_param_uint_write(struct file *file, + const char __user *ubuf, size_t len, + loff_t *offp) +{ + struct seq_file *m = file->private_data; + unsigned int *value = m->private; + int ret; + + ret = kstrtouint_from_user(ubuf, len, 0, value); + if (ret) { + /* support boolean values too */ + bool b; + + ret = kstrtobool_from_user(ubuf, len, &b); + if (!ret) + *value = b; + } + + return ret ?: len; +} + +static const struct file_operations intel_display_param_uint_fops = { + .owner = THIS_MODULE, + .open = intel_display_param_uint_open, + .read = seq_read, + .write = intel_display_param_uint_write, + .llseek = default_llseek, + .release = single_release, +}; + +static const struct file_operations intel_display_param_uint_fops_ro = { + .owner = THIS_MODULE, + .open = intel_display_param_uint_open, + .read = seq_read, + .llseek = default_llseek, + .release = single_release, +}; + +/* char * param */ +static int intel_display_param_charp_show(struct seq_file *m, void *data) +{ + const char **s = m->private; + + seq_printf(m, "%s\n", *s); + + return 0; +} + +static int intel_display_param_charp_open(struct inode *inode, struct file *file) +{ + return single_open(file, intel_display_param_charp_show, inode->i_private); +} + +static ssize_t intel_display_param_charp_write(struct file *file, + const char __user *ubuf, size_t len, + loff_t *offp) +{ + struct seq_file *m = file->private_data; + char **s = m->private; + char *new, *old; + + old = *s; + new = strndup_user(ubuf, PAGE_SIZE); + if (IS_ERR(new)) { + len = PTR_ERR(new); + goto out; + } + + *s = new; + + kfree(old); +out: + return len; +} + +static const struct file_operations intel_display_param_charp_fops = { + .owner = THIS_MODULE, + .open = intel_display_param_charp_open, + .read = seq_read, + .write = intel_display_param_charp_write, + .llseek = default_llseek, + .release = single_release, +}; + +static const struct file_operations intel_display_param_charp_fops_ro = { + .owner = THIS_MODULE, + .open = intel_display_param_charp_open, + .read = seq_read, + .llseek = default_llseek, + .release = single_release, +}; + +#define RO(mode) (((mode) & 0222) == 0) + +static struct dentry * +intel_display_debugfs_create_int(const char *name, umode_t mode, + struct dentry *parent, int *value) +{ + return debugfs_create_file_unsafe(name, mode, parent, value, + RO(mode) ? &intel_display_param_int_fops_ro : + &intel_display_param_int_fops); +} + +static struct dentry * +intel_display_debugfs_create_uint(const char *name, umode_t mode, + struct dentry *parent, unsigned int *value) +{ + return debugfs_create_file_unsafe(name, mode, parent, value, + RO(mode) ? &intel_display_param_uint_fops_ro : + &intel_display_param_uint_fops); +} + +static struct dentry * +intel_display_debugfs_create_charp(const char *name, umode_t mode, + struct dentry *parent, char **value) +{ + return debugfs_create_file(name, mode, parent, value, + RO(mode) ? &intel_display_param_charp_fops_ro : + &intel_display_param_charp_fops); +} + +#define _intel_display_param_create_file(parent, name, mode, valp) \ + do { \ + if (mode) \ + _Generic(valp, \ + bool * : debugfs_create_bool, \ + int * : intel_display_debugfs_create_int, \ + unsigned int * : intel_display_debugfs_create_uint, \ + unsigned long * : debugfs_create_ulong, \ + char ** : intel_display_debugfs_create_charp) \ + (name, mode, parent, valp); \ + } while (0) + +/* add a subdirectory with files for each intel display param */ +void intel_display_debugfs_params(struct drm_i915_private *i915) +{ + struct drm_minor *minor = i915->drm.primary; + struct intel_display_params *params = &i915->display.params; + struct dentry *dir; + char dirname[16]; + + snprintf(dirname, sizeof(dirname), "%s_params", i915->drm.driver->name); + dir = debugfs_lookup(dirname, minor->debugfs_root); + if (!dir) + dir = debugfs_create_dir(dirname, minor->debugfs_root); + if (IS_ERR(dir)) + return; + + /* + * Note: We could create files for params needing special handling + * here. Set mode in params to 0 to skip the generic create file, or + * just let the generic create file fail silently with -EEXIST. + */ + +#define REGISTER(T, x, unused, mode, ...) _intel_display_param_create_file(dir, #x, mode, ¶ms->x); + INTEL_DISPLAY_PARAMS_FOR_EACH(REGISTER); +#undef REGISTER +} diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs_params.h b/drivers/gpu/drm/i915/display/intel_display_debugfs_params.h new file mode 100644 index 000000000000..0e33f4e90ddc --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs_params.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2023 Intel Corporation + */ + +#ifndef __INTEL_DISPLAY_DEBUGFS_PARAMS__ +#define __INTEL_DISPLAY_DEBUGFS_PARAMS__ + +struct dentry; +struct drm_i915_private; + +void intel_display_debugfs_params(struct drm_i915_private *i915); + +#endif /* __INTEL_DISPLAY_DEBUGFS_PARAMS__ */ diff --git a/drivers/gpu/drm/i915/display/intel_display_device.c b/drivers/gpu/drm/i915/display/intel_display_device.c index a6a18eae7ae8..7b7d8e41e5be 100644 --- a/drivers/gpu/drm/i915/display/intel_display_device.c +++ b/drivers/gpu/drm/i915/display/intel_display_device.c @@ -12,6 +12,7 @@ #include "intel_de.h" #include "intel_display.h" #include "intel_display_device.h" +#include "intel_display_params.h" #include "intel_display_power.h" #include "intel_display_reg_defs.h" #include "intel_fbc.h" @@ -937,6 +938,13 @@ void intel_display_device_probe(struct drm_i915_private *i915) DISPLAY_RUNTIME_INFO(i915)->ip.rel = rel; DISPLAY_RUNTIME_INFO(i915)->ip.step = step; } + + intel_display_params_copy(&i915->display.params, &intel_display_modparams); +} + +void intel_display_device_remove(struct drm_i915_private *i915) +{ + intel_display_params_free(&i915->display.params); } void intel_display_device_info_runtime_init(struct drm_i915_private *i915) diff --git a/drivers/gpu/drm/i915/display/intel_display_device.h b/drivers/gpu/drm/i915/display/intel_display_device.h index 44733c9d5812..f5a614a553a2 100644 --- a/drivers/gpu/drm/i915/display/intel_display_device.h +++ b/drivers/gpu/drm/i915/display/intel_display_device.h @@ -151,6 +151,7 @@ struct intel_display_device_info { }; void intel_display_device_probe(struct drm_i915_private *i915); +void intel_display_device_remove(struct drm_i915_private *i915); void intel_display_device_info_runtime_init(struct drm_i915_private *i915); void intel_display_device_info_print(const struct intel_display_device_info *info, diff --git a/drivers/gpu/drm/i915/display/intel_display_params.c b/drivers/gpu/drm/i915/display/intel_display_params.c new file mode 100644 index 000000000000..530cc80d0928 --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_display_params.c @@ -0,0 +1,95 @@ +/* + * Copyright © 2023 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 "intel_display_params.h" +#include "i915_drv.h" + +#define intel_display_param_named(name, T, perm, desc) \ + module_param_named(name, intel_display_modparams.name, T, perm); \ + MODULE_PARM_DESC(name, desc) +#define intel_display_param_named_unsafe(name, T, perm, desc) \ + module_param_named_unsafe(name, intel_display_modparams.name, T, perm); \ + MODULE_PARM_DESC(name, desc) + +struct intel_display_params intel_display_modparams __read_mostly = { +#define MEMBER(T, member, value, ...) .member = (value), + INTEL_DISPLAY_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. + */ + +static void _param_dup_charp(char **valp) +{ + *valp = kstrdup(*valp, GFP_ATOMIC); +} + +static void _param_nop(void *valp) +{ +} + +#define _param_dup(valp) \ + _Generic(valp, \ + char ** : _param_dup_charp, \ + default : _param_nop) \ + (valp) + +void intel_display_params_copy(struct intel_display_params *dest, + const struct intel_display_params *src) +{ + *dest = *src; +#define DUP(T, x, ...) _param_dup(&dest->x); + INTEL_DISPLAY_PARAMS_FOR_EACH(DUP); +#undef DUP +} + +static void _param_free_charp(char **valp) +{ + kfree(*valp); + *valp = NULL; +} + +#define _param_free(valp) \ + _Generic(valp, \ + char ** : _param_free_charp, \ + default : _param_nop) \ + (valp) + +/* free the allocated members, *not* the passed in params itself */ +void intel_display_params_free(struct intel_display_params *params) +{ +#define FREE(T, x, ...) _param_free(¶ms->x); + INTEL_DISPLAY_PARAMS_FOR_EACH(FREE); +#undef FREE +} diff --git a/drivers/gpu/drm/i915/display/intel_display_params.h b/drivers/gpu/drm/i915/display/intel_display_params.h new file mode 100644 index 000000000000..4c241f265c10 --- /dev/null +++ b/drivers/gpu/drm/i915/display/intel_display_params.h @@ -0,0 +1,58 @@ +/* + * Copyright © 2023 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, sublicense, + * 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. + */ + +#ifndef _INTEL_DISPLAY_PARAMS_H_ +#define _INTEL_DISPLAY_PARAMS_H_ + +#include <linux/types.h> +#include <linux/cache.h> /* for __read_mostly */ + +struct drm_printer; + +/* + * Invoke param, a function-like macro, for each intel display param, with + * arguments: + * + * param(type, name, value, mode) + * + * type: parameter type, one of {bool, int, unsigned int, unsigned long, char *} + * name: name of the parameter + * value: initial/default value of the parameter + * mode: debugfs file permissions, one of {0400, 0600, 0}, use 0 to not create + * debugfs file + */ +#define INTEL_DISPLAY_PARAMS_FOR_EACH(param) + +#define MEMBER(T, member, ...) T member; +struct intel_display_params { + INTEL_DISPLAY_PARAMS_FOR_EACH(MEMBER); +}; +#undef MEMBER + +extern struct intel_display_params intel_display_modparams __read_mostly; + +void intel_display_params_copy(struct intel_display_params *dest, + const struct intel_display_params *src); +void intel_display_params_free(struct intel_display_params *params); + +#endif diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c index 78501a83ba10..a86b10093dc4 100644 --- a/drivers/gpu/drm/i915/i915_driver.c +++ b/drivers/gpu/drm/i915/i915_driver.c @@ -907,6 +907,8 @@ static void i915_driver_release(struct drm_device *dev) intel_runtime_pm_driver_release(rpm); i915_driver_late_release(dev_priv); + + intel_display_device_remove(dev_priv); } static int i915_driver_open(struct drm_device *dev, struct drm_file *file) -- 2.34.1
