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

Gaurav K Singh
2015-06-18T21:56:26Z

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@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 | 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