Commit 27a5e78a authored by Raag Jadav's avatar Raag Jadav Committed by Matt Roper
Browse files

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: default avatarRaag Jadav <raag.jadav@intel.com>
Reviewed-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://patch.msgid.link/20260313080438.4166251-1-raag.jadav@intel.com


Signed-off-by: default avatarMatt Roper <matthew.d.roper@intel.com>
parent 192cb1f5

drivers/gpu/drm/xe/xe_i2c.c

+12 −3
Original line number Diff line number Diff line
@@ -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)

	/* 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,