[PATCH 6/7] drm/i915: Support for RR switching on VLV

Vandana Kannan
2014-12-18T15:15:40Z

Definition of VLV RR switch bit and corresponding toggling in
set_drrs function.

Signed-off-by: Vandana Kannan <vandana.kannan@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
---
drivers/gpu/drm/i915/i915_reg.h | 1 +
drivers/gpu/drm/i915/intel_dp.c | 10 ++++++++--
2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 9a9731d..d673605 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3836,6 +3836,7 @@ enum punit_power_well {
#define PIPECONF_INTERLACE_MODE_MASK (7 << 21)
#define PIPECONF_EDP_RR_MODE_SWITCH (1 << 20)
#define PIPECONF_CXSR_DOWNCLOCK (1<<16)
+#define PIPECONF_EDP_RR_MODE_SWITCH_VLV (1 << 14)
#define PIPECONF_COLOR_RANGE_SELECT (1 << 13)
#define PIPECONF_BPC_MASK (0x7 << 5)
#define PIPECONF_8BPC (0<<5)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 38d61f2..ef8fa94 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -4819,10 +4819,16 @@ static void intel_dp_set_drrs_state(struct drm_device *dev, int refresh_rate)
reg = PIPECONF(intel_crtc->config.cpu_transcoder);
val = I915_READ(reg);
if (index > DRRS_HIGH_RR) {
- val |= PIPECONF_EDP_RR_MODE_SWITCH;
+ if (IS_VALLEYVIEW(dev))
+ val |= PIPECONF_EDP_RR_MODE_SWITCH_VLV;
+ else
+ val |= PIPECONF_EDP_RR_MODE_SWITCH;
intel_dp_set_m_n(intel_crtc);
} else {
- val &= ~PIPECONF_EDP_RR_MODE_SWITCH;
+ if (IS_VALLEYVIEW(dev))
+ val &= ~PIPECONF_EDP_RR_MODE_SWITCH_VLV;
+ else
+ val &= ~PIPECONF_EDP_RR_MODE_SWITCH;
}
I915_WRITE(reg, val);