diff options
| -rw-r--r-- | drivers/gpu/drm/i915/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_uncore.c | 39 |
3 files changed, 41 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig index 183f5dc1c3f2..88e60c9291e4 100644 --- a/drivers/gpu/drm/i915/Kconfig +++ b/drivers/gpu/drm/i915/Kconfig @@ -19,6 +19,7 @@ config DRM_I915 select INPUT if ACPI select ACPI_VIDEO if ACPI select ACPI_BUTTON if ACPI + select IOSF_MBI help Choose this option if you have a system that has "Intel Graphics Media Accelerator" or "HD Graphics" integrated graphics, diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 5f70546f7636..19a51882adf5 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -722,6 +722,7 @@ struct intel_uncore { const struct intel_forcewake_range *fw_domains_table; unsigned int fw_domains_table_entries; + struct notifier_block pmic_bus_access_nb; struct intel_uncore_funcs funcs; unsigned fifo_count; diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index df84b04f215e..6106a54ecff5 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -25,6 +25,7 @@ #include "intel_drv.h" #include "i915_vgpu.h" +#include <asm/iosf_mbi.h> #include <linux/pm_runtime.h> #define FORCEWAKE_ACK_TIMEOUT_MS 50 @@ -429,12 +430,16 @@ static void __intel_uncore_early_sanitize(struct drm_i915_private *dev_priv, void intel_uncore_suspend(struct drm_i915_private *dev_priv) { + iosf_mbi_unregister_pmic_bus_access_notifier( + &dev_priv->uncore.pmic_bus_access_nb); intel_uncore_forcewake_reset(dev_priv, false); } void intel_uncore_resume_early(struct drm_i915_private *dev_priv) { __intel_uncore_early_sanitize(dev_priv, true); + iosf_mbi_register_pmic_bus_access_notifier( + &dev_priv->uncore.pmic_bus_access_nb); i915_check_and_clear_faults(dev_priv); } @@ -1390,6 +1395,32 @@ static void intel_uncore_fw_domains_init(struct drm_i915_private *dev_priv) dev_priv->uncore.fw_domains_table_entries = ARRAY_SIZE((d)); \ } +static int i915_pmic_bus_access_notifier(struct notifier_block *nb, + unsigned long action, void *data) +{ + struct drm_i915_private *dev_priv = container_of(nb, + struct drm_i915_private, uncore.pmic_bus_access_nb); + + switch (action) { + case MBI_PMIC_BUS_ACCESS_BEGIN: + /* + * forcewake all now to make sure that we don't need to do a + * forcewake later which on systems where this notifier gets + * called requires the punit to access to the shared pmic i2c + * bus, which will be busy after this notification, leading to: + * "render: timed out waiting for forcewake ack request." + * errors. + */ + intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); + break; + case MBI_PMIC_BUS_ACCESS_END: + intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); + break; + } + + return NOTIFY_OK; +} + void intel_uncore_init(struct drm_i915_private *dev_priv) { i915_check_vgpu(dev_priv); @@ -1399,6 +1430,8 @@ void intel_uncore_init(struct drm_i915_private *dev_priv) __intel_uncore_early_sanitize(dev_priv, false); dev_priv->uncore.unclaimed_mmio_check = 1; + dev_priv->uncore.pmic_bus_access_nb.notifier_call = + i915_pmic_bus_access_notifier; switch (INTEL_INFO(dev_priv)->gen) { default: @@ -1458,6 +1491,9 @@ void intel_uncore_init(struct drm_i915_private *dev_priv) ASSIGN_READ_MMIO_VFUNCS(vgpu); } + iosf_mbi_register_pmic_bus_access_notifier( + &dev_priv->uncore.pmic_bus_access_nb); + i915_check_and_clear_faults(dev_priv); } #undef ASSIGN_WRITE_MMIO_VFUNCS @@ -1465,6 +1501,9 @@ void intel_uncore_init(struct drm_i915_private *dev_priv) void intel_uncore_fini(struct drm_i915_private *dev_priv) { + iosf_mbi_unregister_pmic_bus_access_notifier( + &dev_priv->uncore.pmic_bus_access_nb); + /* Paranoia: make sure we have disabled everything before we exit. */ intel_uncore_sanitize(dev_priv); intel_uncore_forcewake_reset(dev_priv, false); |