Since multiple connectors may run intel_dp_aux_xfer conncurrently, a
single global pm_qos does not suffice. (One connector may disable the
dma-latency boost prematurely while the second is still depending on
it.) Instead of a single global pm_qos, track the pm_qos request for
each intel_dp.
Fixes: 9ee32fea5fe8 ("drm/i915: irq-drive the dp aux communication")
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Cc: Imre Deak <imre.deak@xxxxxxxxx>
---
.../gpu/drm/i915/display/intel_display_types.h | 3 +++
drivers/gpu/drm/i915/display/intel_dp.c | 16 +++++++++++++---
drivers/gpu/drm/i915/i915_drv.c | 5 -----
drivers/gpu/drm/i915/i915_drv.h | 3 ---
4 files changed, 16 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index b86ba1bdbaa3..1067bd073c95 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1463,6 +1463,9 @@ struct intel_dp {
bool rgb_to_ycbcr;
} dfp;
+ /* To control wakeup latency, e.g. for irq-driven dp aux transfers. */
+ struct pm_qos_request pm_qos;
+
/* Display stream compression testing */
bool force_dsc_en;
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 357f7921e070..f08e5f1f463d 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1512,7 +1512,7 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
* lowest possible wakeup latency and so prevent the cpu from going into
* deep sleep states.
*/
- cpu_latency_qos_update_request(&i915->pm_qos, 0);
+ cpu_latency_qos_update_request(&intel_dp->pm_qos, 0);
intel_dp_check_edp(intel_dp);
@@ -1643,7 +1643,7 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp,
ret = recv_bytes;
out:
- cpu_latency_qos_update_request(&i915->pm_qos, PM_QOS_DEFAULT_VALUE);
+ cpu_latency_qos_update_request(&intel_dp->pm_qos, PM_QOS_DEFAULT_VALUE);
if (vdd)
edp_panel_vdd_off(intel_dp, false);
@@ -7527,6 +7527,14 @@ static int intel_dp_connector_atomic_check(struct drm_connector *conn,
return intel_modeset_synced_crtcs(state, conn);
}
+static void intel_dp_connector_destroy(struct drm_connector *connector)
+{
+ struct intel_dp *intel_dp = intel_attached_dp(to_intel_connector(connector));
+
+ cpu_latency_qos_remove_request(&intel_dp->pm_qos);
+
+ intel_connector_destroy(connector);
+}
static const struct drm_connector_funcs intel_dp_connector_funcs = {
.force = intel_dp_force,
@@ -7535,7 +7543,7 @@ static const struct drm_connector_funcs intel_dp_connector_funcs = {
.atomic_set_property = intel_digital_connector_atomic_set_property,
.late_register = intel_dp_connector_register,
.early_unregister = intel_dp_connector_unregister,
- .destroy = intel_connector_destroy,
+ .destroy = intel_dp_connector_destroy,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
.atomic_duplicate_state = intel_digital_connector_duplicate_state,
};
@@ -8621,6 +8629,8 @@ intel_dp_init_connector(struct intel_digital_port *dig_port,
intel_dp->frl.is_trained = false;
intel_dp->frl.trained_rate_gbps = 0;
+ cpu_latency_qos_add_request(&intel_dp->pm_qos, PM_QOS_DEFAULT_VALUE);
+
return true;
fail:
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 5708e11d917b..249f765993f7 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -578,8 +578,6 @@ static int i915_driver_hw_probe(struct drm_i915_private *dev_priv)
pci_set_master(pdev);
- cpu_latency_qos_add_request(&dev_priv->pm_qos, PM_QOS_DEFAULT_VALUE);
-
intel_gt_init_workarounds(dev_priv);
/* On the 945G/GM, the chipset reports the MSI capability on the
@@ -626,7 +624,6 @@ static int i915_driver_hw_probe(struct drm_i915_private *dev_priv)
err_msi:
if (pdev->msi_enabled)
pci_disable_msi(pdev);
- cpu_latency_qos_remove_request(&dev_priv->pm_qos);
err_mem_regions:
intel_memory_regions_driver_release(dev_priv);
err_ggtt:
@@ -648,8 +645,6 @@ static void i915_driver_hw_remove(struct drm_i915_private *dev_priv)
if (pdev->msi_enabled)
pci_disable_msi(pdev);
-
- cpu_latency_qos_remove_request(&dev_priv->pm_qos);
}
/**
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index e38a10d5c128..5e5bcef20e33 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -891,9 +891,6 @@ struct drm_i915_private {
bool display_irqs_enabled;
- /* To control wakeup latency, e.g. for irq-driven dp aux transfers. */
- struct pm_qos_request pm_qos;
-
/* Sideband mailbox protection */
struct mutex sb_lock;
struct pm_qos_request sb_qos;
--
2.20.1
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