The HDMI controller found in the BCM2711 has an external interrupt
controller for the CEC and hotplug interrupt shared between the two
instances.
Let's add a variant flag to register a single interrupt handler and
deals with the interrupt handler setup, or two interrupt handlers
relying on an external irqchip.
Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 42 ++++++++++++++++++++++++++--------
drivers/gpu/drm/vc4/vc4_hdmi.h | 7 ++++++
2 files changed, 39 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 80a81fcea315..d208b7d1d937 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1593,9 +1593,11 @@ static int vc4_hdmi_cec_adap_enable(struct cec_adapter *adap, bool enable)
((3600 / usecs) << VC4_HDMI_CEC_CNT_TO_3600_US_SHIFT) |
((3500 / usecs) << VC4_HDMI_CEC_CNT_TO_3500_US_SHIFT));
- HDMI_WRITE(HDMI_CEC_CPU_MASK_CLEAR, VC4_HDMI_CPU_CEC);
+ if (!vc4_hdmi->variant->external_irq_controller)
+ HDMI_WRITE(HDMI_CEC_CPU_MASK_CLEAR, VC4_HDMI_CPU_CEC);
} else {
- HDMI_WRITE(HDMI_CEC_CPU_MASK_SET, VC4_HDMI_CPU_CEC);
+ if (!vc4_hdmi->variant->external_irq_controller)
+ HDMI_WRITE(HDMI_CEC_CPU_MASK_SET, VC4_HDMI_CPU_CEC);
HDMI_WRITE(HDMI_CEC_CNTRL_5, val |
VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET);
}
@@ -1670,8 +1672,6 @@ static int vc4_hdmi_cec_init(struct vc4_hdmi *vc4_hdmi)
cec_fill_conn_info_from_drm(&conn_info, &vc4_hdmi->connector);
cec_s_conn_info(vc4_hdmi->cec_adap, &conn_info);
- HDMI_WRITE(HDMI_CEC_CPU_MASK_SET, 0xffffffff);
-
value = HDMI_READ(HDMI_CEC_CNTRL_1);
/* Set the logical address to Unregistered */
value |= VC4_HDMI_CEC_ADDR_MASK;
@@ -1679,12 +1679,32 @@ static int vc4_hdmi_cec_init(struct vc4_hdmi *vc4_hdmi)
vc4_hdmi_cec_update_clk_div(vc4_hdmi);
- ret = devm_request_threaded_irq(&pdev->dev, platform_get_irq(pdev, 0),
- vc4_cec_irq_handler,
- vc4_cec_irq_handler_thread, 0,
- "vc4 hdmi cec", vc4_hdmi);
- if (ret)
- goto err_delete_cec_adap;
+ if (vc4_hdmi->variant->external_irq_controller) {
+ ret = devm_request_threaded_irq(&pdev->dev,
+ platform_get_irq_byname(pdev, "cec-rx"),
+ vc4_cec_irq_handler_rx_bare,
+ vc4_cec_irq_handler_rx_thread, 0,
+ "vc4 hdmi cec rx", vc4_hdmi);
+ if (ret)
+ goto err_delete_cec_adap;
+
+ ret = devm_request_threaded_irq(&pdev->dev,
+ platform_get_irq_byname(pdev, "cec-tx"),
+ vc4_cec_irq_handler_tx_bare,
+ vc4_cec_irq_handler_tx_thread, 0,
+ "vc4 hdmi cec tx", vc4_hdmi);
+ if (ret)
+ goto err_delete_cec_adap;
+ } else {
+ HDMI_WRITE(HDMI_CEC_CPU_MASK_SET, 0xffffffff);
+
+ ret = devm_request_threaded_irq(&pdev->dev, platform_get_irq(pdev, 0),
+ vc4_cec_irq_handler,
+ vc4_cec_irq_handler_thread, 0,
+ "vc4 hdmi cec", vc4_hdmi);
+ if (ret)
+ goto err_delete_cec_adap;
+ }
ret = cec_register_adapter(vc4_hdmi->cec_adap, &pdev->dev);
if (ret < 0)
@@ -2083,6 +2103,7 @@ static const struct vc4_hdmi_variant bcm2711_hdmi0_variant = {
PHY_LANE_CK,
},
.unsupported_odd_h_timings = true,
+ .external_irq_controller = true,
.init_resources = vc5_hdmi_init_resources,
.csc_setup = vc5_hdmi_csc_setup,
@@ -2109,6 +2130,7 @@ static const struct vc4_hdmi_variant bcm2711_hdmi1_variant = {
PHY_LANE_2,
},
.unsupported_odd_h_timings = true,
+ .external_irq_controller = true,
.init_resources = vc5_hdmi_init_resources,
.csc_setup = vc5_hdmi_csc_setup,
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h
index adc4bf33ff15..27352827f70c 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.h
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.h
@@ -64,6 +64,13 @@ struct vc4_hdmi_variant {
/* The BCM2711 cannot deal with odd horizontal pixel timings */
bool unsupported_odd_h_timings;
+ /*
+ * The BCM2711 CEC/hotplug IRQ controller is shared between the
+ * two HDMI controllers, and we have a proper irqchip driver for
+ * it.
+ */
+ bool external_irq_controller;
+
/* Callback to get the resources (memory region, interrupts,
* clocks, etc) for that variant.
*/
--
2.28.0
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