[PATCH v7 2/3] drm/i915: Change intel_connector iterators

[Suraj Kandpal]

Change intel_connector iterators as with writeback introduction
not all drm_connector will be embedded within intel_connector.

Signed-off-by: Suraj Kandpal <suraj.kandpal at intel.com>
Reviewed-by: Arun R Murthy <arun.r.murthy at intel.com>
---
 drivers/gpu/drm/i915/display/intel_acpi.c     |  7 +++++-
 drivers/gpu/drm/i915/display/intel_display.h  |  3 ++-
 .../drm/i915/display/intel_display_types.h    | 24 ++++++++++++++++++-
 3 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_acpi.c b/drivers/gpu/drm/i915/display/intel_acpi.c
index 9df78e7caa2b..912fe5c2ffe5 100644
--- a/drivers/gpu/drm/i915/display/intel_acpi.c
+++ b/drivers/gpu/drm/i915/display/intel_acpi.c
@@ -349,8 +349,13 @@ void intel_acpi_video_register(struct drm_i915_private *i915)
 	 */
 	drm_connector_list_iter_begin(&i915->drm, &conn_iter);
 	drm_for_each_connector_iter(connector, &conn_iter) {
-		struct intel_panel *panel = &to_intel_connector(connector)->panel;
+		struct intel_panel *panel;
+		struct intel_connector *intel_connector =
+					to_intel_connector(connector);
 
+		if (!intel_connector)
+			continue;
+		panel = &intel_connector->panel;
 		if (panel->backlight.funcs && !panel->backlight.device) {
 			acpi_video_register_backlight();
 			break;
diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index 6dbcf3a14d06..ae83128d7531 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -52,6 +52,7 @@ struct intel_crtc_state;
 struct intel_digital_port;
 struct intel_dp;
 struct intel_encoder;
+struct intel_connector;
 struct intel_initial_plane_config;
 struct intel_load_detect_pipe;
 struct intel_plane;
@@ -469,7 +470,7 @@ enum hpd_pin {
 		for_each_if(intel_encoder_can_psr(intel_encoder))
 
 #define for_each_intel_connector_iter(intel_connector, iter) \
-	while ((intel_connector = to_intel_connector(drm_connector_list_iter_next(iter))))
+	while ((intel_connector = intel_connector_list_iter_next(iter)))
 
 #define for_each_encoder_on_crtc(dev, __crtc, intel_encoder) \
 	list_for_each_entry((intel_encoder), &(dev)->mode_config.encoder_list, base.head) \
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index a3cbfd6bf047..1d2c9e714561 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1496,9 +1496,10 @@ struct cxsr_latency {
 };
 
 #define to_intel_atomic_state(x) container_of(x, struct intel_atomic_state, base)
+#define to_intel_connector(x) ((((x)->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)) ?\
+				NULL : container_of(x, struct intel_connector, base))
 #define to_intel_crtc(x) container_of(x, struct intel_crtc, base)
 #define to_intel_crtc_state(x) container_of(x, struct intel_crtc_state, uapi)
-#define to_intel_connector(x) container_of(x, struct intel_connector, base)
 #define to_intel_encoder(x) container_of(x, struct intel_encoder, base)
 #define to_intel_framebuffer(x) container_of(x, struct intel_framebuffer, base)
 #define to_intel_plane(x) container_of(x, struct intel_plane, base)
@@ -2070,4 +2071,25 @@ to_intel_frontbuffer(struct drm_framebuffer *fb)
 	return fb ? to_intel_framebuffer(fb)->frontbuffer : NULL;
 }
 
+static inline struct intel_connector *
+intel_connector_list_iter_next(struct drm_connector_list_iter *iter)
+{
+	struct drm_connector *connector;
+	bool flag = true;
+	/*
+	 * Skipping connector that are Writeback connector as they will
+	 * not be embedded in intel connector
+	 */
+	while (flag) {
+		connector = drm_connector_list_iter_next(iter);
+		if (connector && !to_intel_connector(connector))
+			continue;
+
+		flag = false;
+
+		if (connector)
+			return to_intel_connector(connector);
+	}
+	return NULL;
+}
 #endif /*  __INTEL_DISPLAY_TYPES_H__ */
-- 
2.25.1