[PATCH 01/19] drm/i915/display: Check whether platform supports joiner

[Ankit Nautiyal]

Add a helper to check if platform supports joiner. Use it before readout
for joiner stuff and to calculate the maxdotclock supported.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index b4ec9bf12aa7..486bade9e927 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -3536,14 +3536,23 @@ static bool transcoder_ddi_func_is_enabled(struct drm_i915_private *dev_priv,
 	return tmp & TRANS_DDI_FUNC_ENABLE;
 }
 
+static bool intel_display_can_use_joiner(struct intel_display *display)
+{
+	return (DISPLAY_VER(display) >= 11);
+}
+
 static void enabled_joiner_pipes(struct drm_i915_private *dev_priv,
 				 u8 *primary_pipes, u8 *secondary_pipes)
 {
+	struct intel_display *display = to_intel_display(&dev_priv->drm);
 	struct intel_crtc *crtc;
 
 	*primary_pipes = 0;
 	*secondary_pipes = 0;
 
+	if (!intel_display_can_use_joiner(display))
+		return;
+
 	for_each_intel_crtc_in_pipe_mask(&dev_priv->drm, crtc,
 					 joiner_pipes(dev_priv)) {
 		enum intel_display_power_domain power_domain;
@@ -7961,10 +7970,11 @@ void intel_setup_outputs(struct drm_i915_private *dev_priv)
 
 static int max_dotclock(struct drm_i915_private *i915)
 {
+	struct intel_display *display = to_intel_display(&i915->drm);
 	int max_dotclock = i915->display.cdclk.max_dotclk_freq;
 
 	/* icl+ might use joiner */
-	if (DISPLAY_VER(i915) >= 11)
+	if (intel_display_can_use_joiner(display))
 		max_dotclock *= 2;
 
 	return max_dotclock;
-- 
2.45.2