[Intel-gfx] [PATCH] drm/i915: Initialize primary plane src/dst coords when reading hw state

[Ander Conselvan de Oliveira]

Otherwise setting the rotation property will cause the primary plane to
be disabled, caused by having a 0x0 initial value.

Cc: stable at vger.kernel.org
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=87662
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira at intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index d1a4de8..fdea96c 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13322,6 +13322,23 @@ static bool primary_get_hw_state(struct intel_crtc *crtc)
 	return I915_READ(DSPCNTR(crtc->plane)) & DISPLAY_PLANE_ENABLE;
 }
 
+static void primary_update_size(struct intel_crtc *crtc)
+{
+	struct intel_plane *primary = to_intel_plane(crtc->base.primary);
+
+	if (!crtc->primary_enabled)
+		return;
+
+	primary->crtc_x = 0;
+	primary->crtc_y = 0;
+	primary->crtc_w = crtc->config.pipe_src_w;
+	primary->crtc_h = crtc->config.pipe_src_h;
+	primary->src_x = 0;
+	primary->src_y = 0;
+	primary->src_w = crtc->config.pipe_src_w << 16;
+	primary->src_h = crtc->config.pipe_src_h << 16;
+}
+
 static void intel_modeset_readout_hw_state(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
@@ -13332,6 +13349,7 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
 	int i;
 
 	for_each_intel_crtc(dev, crtc) {
+
 		memset(&crtc->config, 0, sizeof(crtc->config));
 
 		crtc->config.quirks |= PIPE_CONFIG_QUIRK_INHERITED_MODE;
@@ -13341,6 +13359,7 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
 
 		crtc->base.enabled = crtc->active;
 		crtc->primary_enabled = primary_get_hw_state(crtc);
+		primary_update_size(crtc);
 
 		DRM_DEBUG_KMS("[CRTC:%d] hw state readout: %s\n",
 			      crtc->base.base.id,
-- 
1.9.1