Write a 32-bit value of zero to disable GFXOFF and write a 32-bit
value of non-zero to enable GFXOFF.
Signed-off-by: Tom St Denis <tom.stdenis@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 56 +++++++++++++++++++++
1 file changed, 56 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index 7379910790c9..3bb74056b9d2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -842,6 +842,55 @@ static ssize_t amdgpu_debugfs_gpr_read(struct file *f, char __user *buf,
return result;
}
+/**
+ * amdgpu_debugfs_regs_gfxoff_write - Enable/disable GFXOFF
+ *
+ * @f: open file handle
+ * @buf: User buffer to write data from
+ * @size: Number of bytes to write
+ * @pos: Offset to seek to
+ *
+ * Write a 32-bit zero to disable or a 32-bit non-zero to enable
+ */
+static ssize_t amdgpu_debugfs_gfxoff_write(struct file *f, const char __user *buf,
+ size_t size, loff_t *pos)
+{
+ struct amdgpu_device *adev = file_inode(f)->i_private;
+ ssize_t result = 0;
+ int r;
+
+ if (size & 0x3 || *pos & 0x3)
+ return -EINVAL;
+
+ r = pm_runtime_get_sync(adev->ddev->dev);
+ if (r < 0)
+ return r;
+
+ while (size) {
+ uint32_t value;
+
+ r = get_user(value, (uint32_t *)buf);
+ if (r) {
+ pm_runtime_mark_last_busy(adev->ddev->dev);
+ pm_runtime_put_autosuspend(adev->ddev->dev);
+ return r;
+ }
+
+ amdgpu_gfx_off_ctrl(adev, value ? true : false);
+
+ result += 4;
+ buf += 4;
+ *pos += 4;
+ size -= 4;
+ }
+
+ pm_runtime_mark_last_busy(adev->ddev->dev);
+ pm_runtime_put_autosuspend(adev->ddev->dev);
+
+ return result;
+}
+
+
static const struct file_operations amdgpu_debugfs_regs_fops = {
.owner = THIS_MODULE,
.read = amdgpu_debugfs_regs_read,
@@ -890,6 +939,11 @@ static const struct file_operations amdgpu_debugfs_gpr_fops = {
.llseek = default_llseek
};
+static const struct file_operations amdgpu_debugfs_gfxoff_fops = {
+ .owner = THIS_MODULE,
+ .write = amdgpu_debugfs_gfxoff_write,
+};
+
static const struct file_operations *debugfs_regs[] = {
&amdgpu_debugfs_regs_fops,
&amdgpu_debugfs_regs_didt_fops,
@@ -899,6 +953,7 @@ static const struct file_operations *debugfs_regs[] = {
&amdgpu_debugfs_sensors_fops,
&amdgpu_debugfs_wave_fops,
&amdgpu_debugfs_gpr_fops,
+ &amdgpu_debugfs_gfxoff_fops,
};
static const char *debugfs_regs_names[] = {
@@ -910,6 +965,7 @@ static const char *debugfs_regs_names[] = {
"amdgpu_sensors",
"amdgpu_wave",
"amdgpu_gpr",
+ "amdgpu_gfxoff",
};
/**
--
2.24.1
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