[Intel-gfx] [PATCH resend 1/2] drm/i915/display: Add a intel_pipe_is_enabled() helper

[Hans de Goede]

Factor the code to check if a pipe is currently enabled out of
assert_pipe() and put it in a new intel_pipe_is_enabled() helper,
so that it can be re-used without copy-pasting it.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 20 ++++++++++++++------
 drivers/gpu/drm/i915/display/intel_display.h |  2 ++
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index e1060076ac83..9cb304aee285 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -442,17 +442,13 @@ void assert_panel_unlocked(struct drm_i915_private *dev_priv, enum pipe pipe)
 	     pipe_name(pipe));
 }
 
-void assert_pipe(struct drm_i915_private *dev_priv,
-		 enum transcoder cpu_transcoder, bool state)
+bool intel_pipe_is_enabled(struct drm_i915_private *dev_priv,
+			   enum transcoder cpu_transcoder)
 {
 	bool cur_state;
 	enum intel_display_power_domain power_domain;
 	intel_wakeref_t wakeref;
 
-	/* we keep both pipes enabled on 830 */
-	if (IS_I830(dev_priv))
-		state = true;
-
 	power_domain = POWER_DOMAIN_TRANSCODER(cpu_transcoder);
 	wakeref = intel_display_power_get_if_enabled(dev_priv, power_domain);
 	if (wakeref) {
@@ -464,6 +460,18 @@ void assert_pipe(struct drm_i915_private *dev_priv,
 		cur_state = false;
 	}
 
+	return cur_state;
+}
+
+void assert_pipe(struct drm_i915_private *dev_priv,
+		 enum transcoder cpu_transcoder, bool state)
+{
+	bool cur_state = intel_pipe_is_enabled(dev_priv, cpu_transcoder);
+
+	/* we keep both pipes enabled on 830 */
+	if (IS_I830(dev_priv))
+		state = true;
+
 	I915_STATE_WARN(cur_state != state,
 			"transcoder %s assertion failure (expected %s, current %s)\n",
 			transcoder_name(cpu_transcoder),
diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index 0e4c1481fa00..642cc87f3e38 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -533,6 +533,8 @@ void intel_enable_pipe(const struct intel_crtc_state *new_crtc_state);
 void intel_disable_pipe(const struct intel_crtc_state *old_crtc_state);
 void i830_enable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe);
 void i830_disable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe);
+bool intel_pipe_is_enabled(struct drm_i915_private *dev_priv,
+			   enum transcoder cpu_transcoder);
 enum pipe intel_crtc_pch_transcoder(struct intel_crtc *crtc);
 int vlv_get_hpll_vco(struct drm_i915_private *dev_priv);
 int vlv_get_cck_clock(struct drm_i915_private *dev_priv,
-- 
2.30.1