drm/nouveau/debugfs: add copy of sysfs pstate interface ported to debugfs (6e9fc177) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/gpu/drm/nouveau/nouveau_debugfs.c

+138 −2

Original line number	Diff line number	Diff line
		@@ -30,6 +30,7 @@

		#include <linux/debugfs.h>
		#include <nvif/class.h>
		#include <nvif/if0001.h>
		#include "nouveau_debugfs.h"
		#include "nouveau_drm.h"

		@@ -45,6 +46,140 @@ nouveau_debugfs_vbios_image(struct seq_file m, void data)
		return 0;
		}

		static int
		nouveau_debugfs_pstate_get(struct seq_file m, void data)
		{
		struct drm_info_node node = (struct drm_info_node ) m->private;
		struct nouveau_debugfs *debugfs = nouveau_debugfs(node->minor->dev);
		struct nvif_object *ctrl = &debugfs->ctrl;
		struct nvif_control_pstate_info_v0 info = {};
		int ret, i;

		if (!debugfs)
		return -ENODEV;

		ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_INFO, &info, sizeof(info));
		if (ret)
		return ret;

		for (i = 0; i < info.count + 1; i++) {
		const s32 state = i < info.count ? i :
		NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT;
		struct nvif_control_pstate_attr_v0 attr = {
		.state = state,
		.index = 0,
		};

		ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR,
		&attr, sizeof(attr));
		if (ret)
		return ret;

		if (i < info.count)
		seq_printf(m, "%02x:", attr.state);
		else
		seq_printf(m, "%s:", info.pwrsrc == 0 ? "DC" :
		info.pwrsrc == 1 ? "AC" : "--");

		attr.index = 0;
		do {
		attr.state = state;
		ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR,
		&attr, sizeof(attr));
		if (ret)
		return ret;

		seq_printf(m, " %s %d", attr.name, attr.min);
		if (attr.min != attr.max)
		seq_printf(m, "-%d", attr.max);
		seq_printf(m, " %s", attr.unit);
		} while (attr.index);

		if (state >= 0) {
		if (info.ustate_ac == state)
		seq_printf(m, " AC");
		if (info.ustate_dc == state)
		seq_printf(m, " DC");
		if (info.pstate == state)
		seq_printf(m, " *");
		} else {
		if (info.ustate_ac < -1)
		seq_printf(m, " AC");
		if (info.ustate_dc < -1)
		seq_printf(m, " DC");
		}

		seq_printf(m, "\n");
		}

		return 0;
		}

		static ssize_t
		nouveau_debugfs_pstate_set(struct file file, const char __user ubuf,
		size_t len, loff_t *offp)
		{
		struct seq_file *m = file->private_data;
		struct drm_info_node node = (struct drm_info_node ) m->private;
		struct nouveau_debugfs *debugfs = nouveau_debugfs(node->minor->dev);
		struct nvif_object *ctrl = &debugfs->ctrl;
		struct nvif_control_pstate_user_v0 args = { .pwrsrc = -EINVAL };
		char buf[32] = {}, tmp, cur = buf;
		long value, ret;

		if (!debugfs)
		return -ENODEV;

		if (len >= sizeof(buf))
		return -EINVAL;

		if (copy_from_user(buf, ubuf, len))
		return -EFAULT;

		if ((tmp = strchr(buf, '\n')))
		*tmp = '\0';

		if (!strncasecmp(cur, "dc:", 3)) {
		args.pwrsrc = 0;
		cur += 3;
		} else
		if (!strncasecmp(cur, "ac:", 3)) {
		args.pwrsrc = 1;
		cur += 3;
		}

		if (!strcasecmp(cur, "none"))
		args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_UNKNOWN;
		else
		if (!strcasecmp(cur, "auto"))
		args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_PERFMON;
		else {
		ret = kstrtol(cur, 16, &value);
		if (ret)
		return ret;
		args.ustate = value;
		}

		ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_USER, &args, sizeof(args));
		if (ret < 0)
		return ret;

		return len;
		}

		static int
		nouveau_debugfs_pstate_open(struct inode inode, struct file file)
		{
		return single_open(file, nouveau_debugfs_pstate_get, inode->i_private);
		}

		static const struct file_operations nouveau_pstate_fops = {
		.owner = THIS_MODULE,
		.open = nouveau_debugfs_pstate_open,
		.read = seq_read,
		.write = nouveau_debugfs_pstate_set,
		};

		static struct drm_info_list nouveau_debugfs_list[] = {
		{ "vbios.rom", nouveau_debugfs_vbios_image, 0, NULL },
		};
		@@ -53,8 +188,9 @@ static struct drm_info_list nouveau_debugfs_list[] = {
		static const struct nouveau_debugfs_files {
		const char *name;
		const struct file_operations *fops;
		} nouveau_debugfs_files[] = {};

		} nouveau_debugfs_files[] = {
		{"pstate", &nouveau_pstate_fops},
		};

		static int
		nouveau_debugfs_create_file(struct drm_minor *minor,