[Nouveau] [RFC PATCH 23/29] debugfs: Add boost interface to change the boost_mode

[Karol Herbst]

Signed-off-by: Karol Herbst <karolher...@gmail.com>
Reviewed-by: Martin Peres <martin.pe...@free.fr>
---
 drm/nouveau/nouveau_debugfs.c | 80 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)

diff --git a/drm/nouveau/nouveau_debugfs.c b/drm/nouveau/nouveau_debugfs.c
index b0a598f9..c19cc535 100644
--- a/drm/nouveau/nouveau_debugfs.c
+++ b/drm/nouveau/nouveau_debugfs.c
@@ -184,6 +184,85 @@ static const struct file_operations nouveau_pstate_fops = {
        .write = nouveau_debugfs_pstate_set,
 };
 
+static void
+nouveau_debugfs_boost_get_entry(struct seq_file *m, u8 mode, u8 entry, u16 
value)
+{
+       if (value) {
+               if (mode == entry)
+                       seq_printf(m, "*%i", entry);
+               else
+                       seq_printf(m, " %i", entry);
+               seq_printf(m, ": %u MHz\n", value);
+       }
+}
+
+static int
+nouveau_debugfs_boost_get(struct seq_file *m, void *data)
+{
+       struct drm_device *drm = m->private;
+       struct nouveau_debugfs *debugfs = nouveau_debugfs(drm);
+       struct nvif_object *ctrl = &debugfs->ctrl;
+       struct nvif_control_boost_info_v0 info = {};
+       int ret;
+
+       ret = nvif_mthd(ctrl, NVIF_CONTROL_BOOST_INFO, &info, sizeof(info));
+       if (ret)
+               return ret;
+
+       nouveau_debugfs_boost_get_entry(m, info.mode, 0, info.base_mhz);
+       nouveau_debugfs_boost_get_entry(m, info.mode, 1, info.boost_mhz);
+       nouveau_debugfs_boost_get_entry(m, info.mode, 2, info.max_mhz);
+       return 0;
+}
+
+static ssize_t
+nouveau_debugfs_boost_set(struct file *file, const char __user *ubuf,
+                         size_t len, loff_t *offp)
+{
+       struct seq_file *m = file->private_data;
+       struct drm_device *drm = m->private;
+       struct nouveau_debugfs *debugfs = nouveau_debugfs(drm);
+       struct nvif_object *ctrl = &debugfs->ctrl;
+       struct nvif_control_boost_set_v0 args = {};
+       char buf[3] = {};
+       long ret;
+       u8 value;
+
+       if (len >= sizeof(buf))
+               return -EINVAL;
+
+       if (copy_from_user(buf, ubuf, len))
+               return -EFAULT;
+
+       ret = kstrtou8(buf, 10, &value);
+       if (ret)
+               return ret;
+
+       args.mode = value;
+       ret = pm_runtime_get_sync(drm->dev);
+       if (IS_ERR_VALUE(ret) && ret != -EACCES)
+               return ret;
+       ret = nvif_mthd(ctrl, NVIF_CONTROL_BOOST_SET, &args, sizeof(args));
+       pm_runtime_put_autosuspend(drm->dev);
+       if (ret)
+               return ret;
+
+       return len;
+}
+
+static int
+nouveau_debugfs_boost_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, nouveau_debugfs_boost_get, inode->i_private);
+}
+
+static const struct file_operations nouveau_boost_fops = {
+       .owner = THIS_MODULE,
+       .open = nouveau_debugfs_boost_open,
+       .read = seq_read,
+       .write = nouveau_debugfs_boost_set,
+};
+
 static struct drm_info_list nouveau_debugfs_list[] = {
        { "vbios.rom", nouveau_debugfs_vbios_image, 0, NULL },
 };
@@ -193,6 +272,7 @@ static const struct nouveau_debugfs_files {
        const char *name;
        const struct file_operations *fops;
 } nouveau_debugfs_files[] = {
+       {"boost", &nouveau_boost_fops},
        {"pstate", &nouveau_pstate_fops},
 };
 
-- 
2.14.1

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