Let's know beforehand if PSR is ready and will be enabled so we can
prevent DRRS to get enabled.
WARN_ON(!drm_modeset_is_locked(&crtc->mutex)) on intel_psr_ready()
has been removed on v3. We don't dereferrence crtc here anymore so
we don't need this check. All configs are now checked from received
pipe config.
v2: Removing is_edp_psr func that is not used after this patch.
Rename match_conditions and document it since it is now external.
Moving to a propper place as pointed out by Sivakumar.
Use a better name as pointed out by Ram.
v3: Don't dereferrence drm_encoder->crtc and intel_crtc->config on
psr_ready check. Fix a opps caused with previous versions.
v4: Mention and explain on commit message the crtc->mutex check
removal that happened on v3.
v5: Rebase on top of ips_ready rework.
Cc: Sivakumar Thulasimani <sivakumar.thulasimani@xxxxxxxxx>
Cc: Ramalingam C <ramalingam.c@xxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Daniel Vetter <daniel@xxxxxxxx>
Reviewed-by: Ramalingam C <ramalingam.c@xxxxxxxxx> (v2)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_display.c | 1 +
drivers/gpu/drm/i915/intel_dp.c | 2 ++
drivers/gpu/drm/i915/intel_drv.h | 3 ++
drivers/gpu/drm/i915/intel_psr.c | 57 ++++++++++++++++++++----------------
4 files changed, 38 insertions(+), 25 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index a0e053e..869929d 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11871,6 +11871,7 @@ static void intel_dump_pipe_config(struct intel_crtc *crtc,
pipe_config->pch_pfit.size,
pipe_config->pch_pfit.enabled ? "enabled" : "disabled");
DRM_DEBUG_KMS("ips ready: %i\n", pipe_config->ips_ready);
+ DRM_DEBUG_KMS("psr ready: %i\n", pipe_config->psr_ready);
DRM_DEBUG_KMS("double wide: %i\n", pipe_config->double_wide);
if (IS_BROXTON(dev)) {
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 273e1ad..e1c3e9a 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1467,6 +1467,8 @@ intel_dp_compute_config(struct intel_encoder *encoder,
*/
min_lane_count = max_lane_count;
min_clock = max_clock;
+
+ pipe_config->psr_ready = intel_psr_ready(intel_dp, pipe_config);
}
for (; bpp >= 6*3; bpp -= 2*3) {
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 6f0b359..06511d2 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -477,6 +477,7 @@ struct intel_crtc_state {
struct intel_link_m_n fdi_m_n;
bool ips_ready;
+ bool psr_ready;
bool double_wide;
@@ -1396,6 +1397,8 @@ void intel_backlight_unregister(struct drm_device *dev);
/* intel_psr.c */
+bool intel_psr_ready(struct intel_dp *intel_dp,
+ struct intel_crtc_state *pipe_config);
void intel_psr_enable(struct intel_dp *intel_dp);
void intel_psr_disable(struct intel_dp *intel_dp);
void intel_psr_invalidate(struct drm_device *dev,
diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index 213581c..4a9d620 100644
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -56,11 +56,6 @@
#include "intel_drv.h"
#include "i915_drv.h"
-static bool is_edp_psr(struct intel_dp *intel_dp)
-{
- return intel_dp->psr_dpcd[0] & DP_PSR_IS_SUPPORTED;
-}
-
static bool vlv_is_psr_active_on_pipe(struct drm_device *dev, int pipe)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@@ -287,19 +282,32 @@ static void hsw_psr_enable_source(struct intel_dp *intel_dp)
EDP_SU_TRACK_ENABLE | EDP_PSR2_TP2_TIME_100);
}
-static bool intel_psr_match_conditions(struct intel_dp *intel_dp)
+/**
+ * intel_psr_ready - PSR ready
+ * @intel_dp: Intel DP
+ * @pipe_config: Pipe Config
+ *
+ * This function Checks if PSR is supported by Hardware/Source and
+ * Panel/Sink and if all conditions to be enabled are fulfilled.
+ *
+ * It is used to know beforehand if PSR is going to be enabled.
+ *
+ * Returns:
+ * True when PSR is ready to be enabled, false otherwise.
+ */
+bool intel_psr_ready(struct intel_dp *intel_dp,
+ struct intel_crtc_state *pipe_config)
{
struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
struct drm_device *dev = dig_port->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
- struct drm_crtc *crtc = dig_port->base.base.crtc;
- struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
- lockdep_assert_held(&dev_priv->psr.lock);
- WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
- WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
+ if (!HAS_PSR(dev)) {
+ DRM_DEBUG_KMS("PSR not supported on this platform\n");
+ return false;
+ }
- dev_priv->psr.source_ok = false;
+ WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
if (IS_HASWELL(dev) && dig_port->port != PORT_A) {
DRM_DEBUG_KMS("HSW ties PSR to DDI A (eDP)\n");
@@ -312,14 +320,14 @@ static bool intel_psr_match_conditions(struct intel_dp *intel_dp)
}
if (IS_HASWELL(dev) &&
- I915_READ(HSW_STEREO_3D_CTL(intel_crtc->config->cpu_transcoder)) &
+ I915_READ(HSW_STEREO_3D_CTL(pipe_config->cpu_transcoder)) &
S3D_ENABLE) {
DRM_DEBUG_KMS("PSR condition failed: Stereo 3D is Enabled\n");
return false;
}
if (IS_HASWELL(dev) &&
- intel_crtc->config->base.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE) {
+ pipe_config->base.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE) {
DRM_DEBUG_KMS("PSR condition failed: Interlaced is Enabled\n");
return false;
}
@@ -330,10 +338,19 @@ static bool intel_psr_match_conditions(struct intel_dp *intel_dp)
return false;
}
+ /* At this point we can tell HW/Source supports PSR */
dev_priv->psr.source_ok = true;
+
+ /* Now check if Panel/Sink supports it */
+ if (!dev_priv->psr.sink_support) {
+ DRM_DEBUG_KMS("PSR not supported by this panel\n");
+ return false;
+ }
+
return true;
}
+
static void intel_psr_activate(struct intel_dp *intel_dp)
{
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
@@ -370,15 +387,8 @@ void intel_psr_enable(struct intel_dp *intel_dp)
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *crtc = to_intel_crtc(intel_dig_port->base.base.crtc);
- if (!HAS_PSR(dev)) {
- DRM_DEBUG_KMS("PSR not supported on this platform\n");
- return;
- }
-
- if (!is_edp_psr(intel_dp)) {
- DRM_DEBUG_KMS("PSR not supported by this panel\n");
+ if (!crtc->config->psr_ready)
return;
- }
mutex_lock(&dev_priv->psr.lock);
if (dev_priv->psr.enabled) {
@@ -386,9 +396,6 @@ void intel_psr_enable(struct intel_dp *intel_dp)
goto unlock;
}
- if (!intel_psr_match_conditions(intel_dp))
- goto unlock;
-
dev_priv->psr.busy_frontbuffer_bits = 0;
if (HAS_DDI(dev)) {
--
2.4.3
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