Let's know beforehand if PSR is ready and will be enabled so we can
prevent DRRS to get enabled.
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.
Cc: Sivakumar Thulasimani <sivakumar.thulasimani@xxxxxxxxx>
Cc: Ramalingam C <ramalingam.c@xxxxxxxxx>
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 | 2 ++
drivers/gpu/drm/i915/intel_psr.c | 50 +++++++++++++++++++++---------------
4 files changed, 35 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 35cdb48..9112ad9 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -10367,6 +10367,7 @@ static void intel_dump_pipe_config(struct intel_crtc *crtc,
pipe_config->pch_pfit.pos,
pipe_config->pch_pfit.size,
pipe_config->pch_pfit.enabled ? "enabled" : "disabled");
+ DRM_DEBUG_KMS("psr ready: %i\n", pipe_config->psr_ready);
DRM_DEBUG_KMS("ips: %i\n", pipe_config->ips_enabled);
DRM_DEBUG_KMS("double wide: %i\n", pipe_config->double_wide);
}
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 637dd53..e6b1c42 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1388,6 +1388,8 @@ 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);
}
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 c0fa1cb..250d70c 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -384,6 +384,7 @@ struct intel_crtc_state {
int fdi_lanes;
struct intel_link_m_n fdi_m_n;
+ bool psr_ready;
bool ips_enabled;
bool double_wide;
@@ -1206,6 +1207,7 @@ void intel_backlight_unregister(struct drm_device *dev);
/* intel_psr.c */
+bool intel_psr_ready(struct intel_dp *intel_dp);
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 c1ca923..2f22ab6 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;
@@ -249,7 +244,19 @@ static void hsw_psr_enable_source(struct intel_dp *intel_dp)
EDP_PSR_ENABLE);
}
-static bool intel_psr_match_conditions(struct intel_dp *intel_dp)
+/**
+ * intel_psr_ready - PSR ready
+ * @intel_dp: Intel DP
+ *
+ * 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_digital_port *dig_port = dp_to_dig_port(intel_dp);
struct drm_device *dev = dig_port->base.base.dev;
@@ -257,12 +264,14 @@ static bool intel_psr_match_conditions(struct intel_dp *intel_dp)
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);
+ if (!HAS_PSR(dev)) {
+ DRM_DEBUG_KMS("PSR not supported on this platform\n");
+ return false;
+ }
+
WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
- dev_priv->psr.source_ok = false;
-
if (IS_HASWELL(dev) && dig_port->port != PORT_A) {
DRM_DEBUG_KMS("HSW ties PSR to DDI A (eDP)\n");
return false;
@@ -292,10 +301,19 @@ 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);
@@ -330,16 +348,11 @@ void intel_psr_enable(struct intel_dp *intel_dp)
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
struct drm_device *dev = intel_dig_port->base.base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_crtc *intel_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 (!intel_crtc->config->psr_ready)
return;
- }
mutex_lock(&dev_priv->psr.lock);
if (dev_priv->psr.enabled) {
@@ -347,9 +360,6 @@ 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)) {
