[RFC 11/14] drm/i915: Enable MIPI display self refresh mode

Gaurav K Singh
2015-05-29T10:40:09Z

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

Signed-off-by: Gaurav K Singh <gaurav.k.singh@intel.com>
Signed-off-by: Yogesh Mohan Marimuthu <yogesh.mohan.marimuthu@intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index cab2ac8..fc84313 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -44,6 +44,7 @@
#include <drm/drm_plane_helper.h>
#include <drm/drm_rect.h>
#include <linux/dma_remapping.h>
+#include "intel_dsi.h"

/* Primary plane formats supported by all gen */
#define COMMON_PRIMARY_FORMATS \
@@ -2110,6 +2111,8 @@ static void intel_enable_pipe(struct intel_crtc *crtc)
{
struct drm_device *dev = crtc->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_encoder *encoder;
+ struct intel_dsi *intel_dsi;
enum pipe pipe = crtc->pipe;
enum transcoder cpu_transcoder = intel_pipe_to_cpu_transcoder(dev_priv,
pipe);
@@ -2154,6 +2157,18 @@ static void intel_enable_pipe(struct intel_crtc *crtc)
return;
}

+ for_each_encoder_on_crtc(dev, &crtc->base, encoder) {
+ if (encoder->type == INTEL_OUTPUT_DSI) {
+ intel_dsi = enc_to_intel_dsi(&encoder->base);
+ if (intel_dsi && (intel_dsi->operation_mode ==
+ INTEL_DSI_COMMAND_MODE)) {
+ val = val | PIPECONF_MIPI_DSR_ENABLE;
+ I915_WRITE(reg, val);
+ }
+ break;
+ }
+ }
+
I915_WRITE(reg, val | PIPECONF_ENABLE);
POSTING_READ(reg);
}
--
1.7.9.5