[PATCH 05/15] drm/i915: take init power domain for sysfs/debugfs entries where needed

[Imre Deak <imre.deak@xxxxxxxxx>]

For simplicity take the init power domain, which puts the device into D0
and turns on all display power wells.

Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 17 +++++++++++++++--
 drivers/gpu/drm/i915/i915_sysfs.c   |  4 ++++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 02f1b39..348cf7c 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1239,9 +1239,13 @@ static int vlv_drpc_info(struct seq_file *m)
 	u32 rpmodectl1, rcctl1;
 	unsigned fw_rendercount = 0, fw_mediacount = 0;
 
+	intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
+
 	rpmodectl1 = I915_READ(GEN6_RP_CONTROL);
 	rcctl1 = I915_READ(GEN6_RC_CONTROL);
 
+	intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);
+
 	seq_printf(m, "Video Turbo Mode: %s\n",
 		   yesno(rpmodectl1 & GEN6_RP_MEDIA_TURBO));
 	seq_printf(m, "Turbo enabled: %s\n",
@@ -1916,9 +1920,11 @@ static int i915_dpio_info(struct seq_file *m, void *data)
 		return 0;
 	}
 
+	intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
+
 	ret = mutex_lock_interruptible(&dev_priv->dpio_lock);
 	if (ret)
-		return ret;
+		goto out;
 
 	seq_printf(m, "DPIO_CTL: 0x%08x\n", I915_READ(DPIO_CTL));
 
@@ -1946,8 +1952,10 @@ static int i915_dpio_info(struct seq_file *m, void *data)
 		   vlv_dpio_read(dev_priv, PIPE_A, VLV_CMN_DW0));
 
 	mutex_unlock(&dev_priv->dpio_lock);
+out:
+	intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);
 
-	return 0;
+	return ret;
 }
 
 static int i915_llc(struct seq_file *m, void *data)
@@ -3305,8 +3313,13 @@ i915_wedged_set(void *data, u64 val)
 {
 	struct drm_device *dev = data;
 
+	intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
+
 	i915_handle_error(dev, val,
 			  "Manually setting wedged to %llu", val);
+
+	intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
index 9c57029..552c4ed 100644
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -263,6 +263,8 @@ static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
 
 	flush_delayed_work(&dev_priv->rps.delayed_resume_work);
 
+	intel_display_power_get(dev_priv, POWER_DOMAIN_INIT);
+
 	mutex_lock(&dev_priv->rps.hw_lock);
 	if (IS_VALLEYVIEW(dev_priv->dev)) {
 		u32 freq;
@@ -273,6 +275,8 @@ static ssize_t gt_cur_freq_mhz_show(struct device *kdev,
 	}
 	mutex_unlock(&dev_priv->rps.hw_lock);
 
+	intel_display_power_put(dev_priv, POWER_DOMAIN_INIT);
+
 	return snprintf(buf, PAGE_SIZE, "%d\n", ret);
 }
 
-- 
1.8.4

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