diff options
| author | Raag Jadav <raag.jadav@intel.com> | 2026-03-13 11:04:38 +0300 |
|---|---|---|
| committer | Matt Roper <matthew.d.roper@intel.com> | 2026-03-16 17:36:41 +0300 |
| commit | 27a5e78a23dd36e487678aee92364fc9ef6d6871 (patch) | |
| tree | 0e6592d8ecfa37c623a1bb8a36d63e0e017643ea | |
| parent | 192cb1f5cb1694c45b7cac14519d7bad65ba22f6 (diff) | |
| download | linux-27a5e78a23dd36e487678aee92364fc9ef6d6871.tar.xz | |
drm/xe/i2c: Assert/Deassert I2C IRQ
I2C IRQ is triggered using virtual wire. Assert/Deassert it in IRQ
handler to allow subsequent interrupt generation.
Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://patch.msgid.link/20260313080438.4166251-1-raag.jadav@intel.com
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
| -rw-r--r-- | drivers/gpu/drm/xe/xe_i2c.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/gpu/drm/xe/xe_i2c.c b/drivers/gpu/drm/xe/xe_i2c.c index 1deb812fe01d..706783863d07 100644 --- a/drivers/gpu/drm/xe/xe_i2c.c +++ b/drivers/gpu/drm/xe/xe_i2c.c @@ -176,11 +176,18 @@ static bool xe_i2c_irq_present(struct xe_device *xe) */ void xe_i2c_irq_handler(struct xe_device *xe, u32 master_ctl) { - if (!xe_i2c_irq_present(xe)) + struct xe_mmio *mmio = xe_root_tile_mmio(xe); + + if (!(master_ctl & I2C_IRQ) || !xe_i2c_irq_present(xe)) return; - if (master_ctl & I2C_IRQ) - generic_handle_irq_safe(xe->i2c->adapter_irq); + /* Forward interrupt to I2C adapter */ + generic_handle_irq_safe(xe->i2c->adapter_irq); + + /* Deassert after I2C adapter clears the interrupt */ + xe_mmio_rmw32(mmio, I2C_CONFIG_CMD, 0, PCI_COMMAND_INTX_DISABLE); + /* Reassert to allow subsequent interrupt generation */ + xe_mmio_rmw32(mmio, I2C_CONFIG_CMD, PCI_COMMAND_INTX_DISABLE, 0); } void xe_i2c_irq_reset(struct xe_device *xe) @@ -190,6 +197,7 @@ void xe_i2c_irq_reset(struct xe_device *xe) if (!xe_i2c_irq_present(xe)) return; + xe_mmio_rmw32(mmio, I2C_CONFIG_CMD, 0, PCI_COMMAND_INTX_DISABLE); xe_mmio_rmw32(mmio, I2C_BRIDGE_PCICFGCTL, ACPI_INTR_EN, 0); } @@ -201,6 +209,7 @@ void xe_i2c_irq_postinstall(struct xe_device *xe) return; xe_mmio_rmw32(mmio, I2C_BRIDGE_PCICFGCTL, 0, ACPI_INTR_EN); + xe_mmio_rmw32(mmio, I2C_CONFIG_CMD, PCI_COMMAND_INTX_DISABLE, 0); } static int xe_i2c_irq_map(struct irq_domain *h, unsigned int virq, |