[Intel-gfx] [RFC 07/14] drm/i915: Disable MIPI display self refresh mode

[Gaurav K Singh]

During disable sequence for MIPI encoder in command mode, disable
MIPI display self-refresh mode bit in Pipe Ctrl reg.

v2: Use crtc state flag instead of loop over encoders (Daniel)

Signed-off-by: Gaurav K Singh <gaurav.k.singh at intel.com>
Signed-off-by: Yogesh Mohan Marimuthu <yogesh.mohan.marimuthu at intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar at intel.com>
---
 drivers/gpu/drm/i915/intel_display.c |    3 +++
 drivers/gpu/drm/i915/intel_drv.h     |    3 +++
 drivers/gpu/drm/i915/intel_dsi.c     |    3 +++
 3 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 067b1de..dd518d6 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2193,6 +2193,9 @@ static void intel_disable_pipe(struct intel_crtc *crtc)
 	if ((val & PIPECONF_ENABLE) == 0)
 		return;
 
+	if (crtc->config->dsi_self_refresh)
+		val = val & ~PIPECONF_MIPI_DSR_ENABLE;
+
 	/*
 	 * Double wide has implications for planes
 	 * so best keep it disabled when not needed.
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 14562c6..4298a00 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -444,6 +444,9 @@ struct intel_crtc_state {
 	bool double_wide;
 
 	bool dp_encoder_is_mst;
+
+	bool dsi_self_refresh;
+
 	int pbn;
 
 	struct intel_crtc_scaler_state scaler_state;
diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index 7021591..36d8ad6 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -308,6 +308,9 @@ static bool intel_dsi_compute_config(struct intel_encoder *encoder,
 
 	DRM_DEBUG_KMS("\n");
 
+	if (is_cmd_mode(intel_dsi))
+		config->dsi_self_refresh = true;
+
 	if (fixed_mode)
 		intel_fixed_panel_mode(fixed_mode, adjusted_mode);
 
-- 
1.7.9.5