drm/i915/skl: Enabling PSR on Skylake
Mainly taking care of some register offsets, otherwise things are similar to
hsw. Also, programming ddi aux to use hardcoded values for psr data select.
v2: introduce EDP_PSR_AUX_BASE macro (Chris)
v3: Moving to HW tracking for SKL+ platforms, so activating source psr during
psr_enabling and then avoiding psr entries and exits for each frontbuffer
updates.
v4: Using SKL DDI AUX regs instead of changing PSR_AUX regs definition (Rodrigo)
Signed-off-by: Sonika Jindal <sonika.jindal@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
[danvet: Drop the hunks to short-circuit sw tracking: We'd need to
push this down one level, and I don't fully trust the test coverage
yet to do so. So much prefer we pick a whitelist approach for the
cases we know work correctly.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index f645a1b..b9f40c2 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -142,6 +142,7 @@
struct drm_device *dev = dig_port->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
uint32_t aux_clock_divider;
+ uint32_t aux_data_reg, aux_ctl_reg;
int precharge = 0x3;
static const uint8_t aux_msg[] = {
[0] = DP_AUX_NATIVE_WRITE << 4,
@@ -164,16 +165,34 @@
drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG,
DP_PSR_ENABLE & ~DP_PSR_MAIN_LINK_ACTIVE);
+ aux_data_reg = (INTEL_INFO(dev)->gen >= 9) ?
+ DPA_AUX_CH_DATA1 : EDP_PSR_AUX_DATA1(dev);
+ aux_ctl_reg = (INTEL_INFO(dev)->gen >= 9) ?
+ DPA_AUX_CH_CTL : EDP_PSR_AUX_CTL(dev);
+
/* Setup AUX registers */
for (i = 0; i < sizeof(aux_msg); i += 4)
- I915_WRITE(EDP_PSR_AUX_DATA1(dev) + i,
+ I915_WRITE(aux_data_reg + i,
intel_dp_pack_aux(&aux_msg[i], sizeof(aux_msg) - i));
- I915_WRITE(EDP_PSR_AUX_CTL(dev),
+ if (INTEL_INFO(dev)->gen >= 9) {
+ uint32_t val;
+
+ val = I915_READ(aux_ctl_reg);
+ val &= ~DP_AUX_CH_CTL_TIME_OUT_MASK;
+ val |= DP_AUX_CH_CTL_TIME_OUT_1600us;
+ val &= ~DP_AUX_CH_CTL_MESSAGE_SIZE_MASK;
+ val |= (sizeof(aux_msg) << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT);
+ /* Use hardcoded data values for PSR */
+ val &= ~DP_AUX_CH_CTL_PSR_DATA_AUX_REG_SKL;
+ I915_WRITE(aux_ctl_reg, val);
+ } else {
+ I915_WRITE(aux_ctl_reg,
DP_AUX_CH_CTL_TIME_OUT_400us |
(sizeof(aux_msg) << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) |
(precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) |
(aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT));
+ }
}
static void vlv_psr_enable_source(struct intel_dp *intel_dp)
@@ -351,6 +370,9 @@
/* Enable PSR on the panel */
hsw_psr_enable_sink(intel_dp);
+
+ if (INTEL_INFO(dev)->gen >= 9)
+ intel_psr_activate(intel_dp);
} else {
vlv_psr_setup_vsc(intel_dp);