summaryrefslogtreecommitdiffstats
path: root/drivers
diff options
context:
space:
mode:
authorSonika Jindal <sonika.jindal@intel.com>2015-01-22 14:30:54 +0530
committerDaniel Vetter <daniel.vetter@ffwll.ch>2015-01-28 17:22:29 +0100
commite3d998451090800927f283981319e7d2f8fb7059 (patch)
tree5a1cbe03da1823b9df596f86eb789f560073cf15 /drivers
parenta50940510e94f5fb65ffd79877a60592d85598a9 (diff)
downloadlinux-e3d998451090800927f283981319e7d2f8fb7059.tar.bz2
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/i915/i915_drv.h3
-rw-r--r--drivers/gpu/drm/i915/i915_reg.h5
-rw-r--r--drivers/gpu/drm/i915/intel_psr.c26
3 files changed, 31 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 7aee7d5d90e2..7add8cd6a54f 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2457,7 +2457,8 @@ struct drm_i915_cmd_table {
#define HAS_DDI(dev) (INTEL_INFO(dev)->has_ddi)
#define HAS_FPGA_DBG_UNCLAIMED(dev) (INTEL_INFO(dev)->has_fpga_dbg)
#define HAS_PSR(dev) (IS_HASWELL(dev) || IS_BROADWELL(dev) || \
- IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev))
+ IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev) || \
+ IS_SKYLAKE(dev))
#define HAS_RUNTIME_PM(dev) (IS_GEN6(dev) || IS_HASWELL(dev) || \
IS_BROADWELL(dev) || IS_VALLEYVIEW(dev))
#define HAS_RC6(dev) (INTEL_INFO(dev)->gen >= 6)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 6f6de8929fd3..33b3d0a24071 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3768,6 +3768,11 @@ enum punit_power_well {
#define DP_AUX_CH_CTL_PRECHARGE_TEST (1 << 11)
#define DP_AUX_CH_CTL_BIT_CLOCK_2X_MASK (0x7ff)
#define DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT 0
+#define DP_AUX_CH_CTL_PSR_DATA_AUX_REG_SKL (1 << 14)
+#define DP_AUX_CH_CTL_FS_DATA_AUX_REG_SKL (1 << 13)
+#define DP_AUX_CH_CTL_GTC_DATA_AUX_REG_SKL (1 << 12)
+#define DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL_MASK (1f << 5)
+#define DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(c) (((c) - 1) << 5)
#define DP_AUX_CH_CTL_SYNC_PULSE_SKL(c) ((c) - 1)
/*
diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index f645a1b1bc97..b9f40c2e0af7 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -142,6 +142,7 @@ static void hsw_psr_enable_sink(struct intel_dp *intel_dp)
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 @@ static void hsw_psr_enable_sink(struct intel_dp *intel_dp)
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 @@ void intel_psr_enable(struct intel_dp *intel_dp)
/* 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);