[Intel-gfx] [PATCH 06/12] drm/i915/icl: Find encoder for DSI command mode

[Madhav Chauhan]

This patch adds a helper function to find encoder
if DSI is operating in command mode. This function
will be used while enabling/disabling TE interrupts
for DSI.

Signed-off-by: Madhav Chauhan <madhav.chauhan at intel.com>
---
 drivers/gpu/drm/i915/icl_dsi.c   | 17 +++++++++++++++++
 drivers/gpu/drm/i915/intel_drv.h |  1 +
 2 files changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/i915/icl_dsi.c b/drivers/gpu/drm/i915/icl_dsi.c
index b189398..bf7ad5e 100644
--- a/drivers/gpu/drm/i915/icl_dsi.c
+++ b/drivers/gpu/drm/i915/icl_dsi.c
@@ -29,6 +29,23 @@
 #include <drm/drm_atomic_helper.h>
 #include "intel_dsi.h"
 
+struct intel_encoder *gen11_dsi_find_cmd_mode_encoder(struct intel_crtc *crtc)
+{
+	struct drm_device *dev = crtc->base.dev;
+	struct intel_encoder *encoder;
+	struct intel_dsi *intel_dsi;
+
+	for_each_encoder_on_crtc(dev, &crtc->base, encoder) {
+		if (encoder->type != INTEL_OUTPUT_DSI)
+			continue;
+		intel_dsi = enc_to_intel_dsi(&encoder->base);
+		if (intel_dsi->operation_mode == INTEL_DSI_COMMAND_MODE)
+			return encoder;
+	}
+
+	return NULL;
+}
+
 static void wait_for_dsi_hdr_credit_release(struct intel_dsi *intel_dsi,
 					    enum transcoder dsi_trans)
 {
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 1b12d53..7dadfc1 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1756,6 +1756,7 @@ void vlv_dsi_init(struct drm_i915_private *dev_priv);
 
 /* icl_dsi.c */
 void intel_gen11_dsi_init(struct drm_i915_private *dev_priv);
+struct intel_encoder *gen11_dsi_find_cmd_mode_encoder(struct intel_crtc *crtc);
 
 /* intel_dsi_dcs_backlight.c */
 int intel_dsi_dcs_init_backlight_funcs(struct intel_connector *intel_connector);
-- 
2.7.4