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drm/xe/i2c: Assert/Deassert I2C IRQ

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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>
This commit is contained in:
Raag Jadav 2026-03-13 13:34:38 +05:30 committed by Matt Roper
parent 192cb1f5cb
commit 27a5e78a23
1 changed files with 12 additions and 3 deletions
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15
drivers/gpu/drm/xe/xe_i2c.c
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@ -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,