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drm/vc4: hdmi: Split the interrupt handlers 

The BCM2711 has two different interrupt sources to transmit and receive
CEC messages, provided through an external interrupt chip shared between
the two HDMI interrupt controllers.

The rest of the CEC controller is identical though so we need to change
a bit the code organisation to share the code as much as possible, yet
still allowing to register independent handlers.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Tested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Link: https://patchwork.freedesktop.org/patch/msgid/20210111142309.193441-10-maxime@cerno.tech
This commit is contained in:
Maxime Ripard 2021-01-11 15:23:03 +01:00
parent cd7f016c93
commit 0c38490a03
No known key found for this signature in database
GPG Key ID: E3EF0D6F671851C5
1 changed files with 65 additions and 21 deletions
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86
drivers/gpu/drm/vc4/vc4_hdmi.c
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@ -1454,15 +1454,22 @@ static int vc4_hdmi_audio_init(struct vc4_hdmi *vc4_hdmi)
}
#ifdef CONFIG_DRM_VC4_HDMI_CEC
static irqreturn_t vc4_cec_irq_handler_thread(int irq, void *priv)
static irqreturn_t vc4_cec_irq_handler_rx_thread(int irq, void *priv)
{
struct vc4_hdmi *vc4_hdmi = priv;
if (vc4_hdmi->cec_irq_was_rx) {
if (vc4_hdmi->cec_rx_msg.len)
cec_received_msg(vc4_hdmi->cec_adap,
&vc4_hdmi->cec_rx_msg);
} else if (vc4_hdmi->cec_tx_ok) {
if (vc4_hdmi->cec_rx_msg.len)
cec_received_msg(vc4_hdmi->cec_adap,
&vc4_hdmi->cec_rx_msg);
return IRQ_HANDLED;
}
static irqreturn_t vc4_cec_irq_handler_tx_thread(int irq, void *priv)
{
struct vc4_hdmi *vc4_hdmi = priv;
if (vc4_hdmi->cec_tx_ok) {
cec_transmit_done(vc4_hdmi->cec_adap, CEC_TX_STATUS_OK,
0, 0, 0, 0);
} else {
@ -1476,6 +1483,19 @@ static irqreturn_t vc4_cec_irq_handler_thread(int irq, void *priv)
return IRQ_HANDLED;
}
static irqreturn_t vc4_cec_irq_handler_thread(int irq, void *priv)
{
struct vc4_hdmi *vc4_hdmi = priv;
irqreturn_t ret;
if (vc4_hdmi->cec_irq_was_rx)
ret = vc4_cec_irq_handler_rx_thread(irq, priv);
else
ret = vc4_cec_irq_handler_tx_thread(irq, priv);
return ret;
}
static void vc4_cec_read_msg(struct vc4_hdmi *vc4_hdmi, u32 cntrl1)
{
struct drm_device *dev = vc4_hdmi->connector.dev;
@ -1500,31 +1520,55 @@ static void vc4_cec_read_msg(struct vc4_hdmi *vc4_hdmi, u32 cntrl1)
}
}
static irqreturn_t vc4_cec_irq_handler_tx_bare(int irq, void *priv)
{
struct vc4_hdmi *vc4_hdmi = priv;
u32 cntrl1;
cntrl1 = HDMI_READ(HDMI_CEC_CNTRL_1);
vc4_hdmi->cec_tx_ok = cntrl1 & VC4_HDMI_CEC_TX_STATUS_GOOD;
cntrl1 &= ~VC4_HDMI_CEC_START_XMIT_BEGIN;
HDMI_WRITE(HDMI_CEC_CNTRL_1, cntrl1);
return IRQ_WAKE_THREAD;
}
static irqreturn_t vc4_cec_irq_handler_rx_bare(int irq, void *priv)
{
struct vc4_hdmi *vc4_hdmi = priv;
u32 cntrl1;
vc4_hdmi->cec_rx_msg.len = 0;
cntrl1 = HDMI_READ(HDMI_CEC_CNTRL_1);
vc4_cec_read_msg(vc4_hdmi, cntrl1);
cntrl1 |= VC4_HDMI_CEC_CLEAR_RECEIVE_OFF;
HDMI_WRITE(HDMI_CEC_CNTRL_1, cntrl1);
cntrl1 &= ~VC4_HDMI_CEC_CLEAR_RECEIVE_OFF;
HDMI_WRITE(HDMI_CEC_CNTRL_1, cntrl1);
return IRQ_WAKE_THREAD;
}
static irqreturn_t vc4_cec_irq_handler(int irq, void *priv)
{
struct vc4_hdmi *vc4_hdmi = priv;
u32 stat = HDMI_READ(HDMI_CEC_CPU_STATUS);
u32 cntrl1, cntrl5;
irqreturn_t ret;
u32 cntrl5;
if (!(stat & VC4_HDMI_CPU_CEC))
return IRQ_NONE;
vc4_hdmi->cec_rx_msg.len = 0;
cntrl1 = HDMI_READ(HDMI_CEC_CNTRL_1);
cntrl5 = HDMI_READ(HDMI_CEC_CNTRL_5);
vc4_hdmi->cec_irq_was_rx = cntrl5 & VC4_HDMI_CEC_RX_CEC_INT;
if (vc4_hdmi->cec_irq_was_rx) {
vc4_cec_read_msg(vc4_hdmi, cntrl1);
cntrl1 |= VC4_HDMI_CEC_CLEAR_RECEIVE_OFF;
HDMI_WRITE(HDMI_CEC_CNTRL_1, cntrl1);
cntrl1 &= ~VC4_HDMI_CEC_CLEAR_RECEIVE_OFF;
} else {
vc4_hdmi->cec_tx_ok = cntrl1 & VC4_HDMI_CEC_TX_STATUS_GOOD;
cntrl1 &= ~VC4_HDMI_CEC_START_XMIT_BEGIN;
}
HDMI_WRITE(HDMI_CEC_CNTRL_1, cntrl1);
HDMI_WRITE(HDMI_CEC_CPU_CLEAR, VC4_HDMI_CPU_CEC);
if (vc4_hdmi->cec_irq_was_rx)
ret = vc4_cec_irq_handler_rx_bare(irq, priv);
else
ret = vc4_cec_irq_handler_tx_bare(irq, priv);
return IRQ_WAKE_THREAD;
HDMI_WRITE(HDMI_CEC_CPU_CLEAR, VC4_HDMI_CPU_CEC);
return ret;
}
static int vc4_hdmi_cec_adap_enable(struct cec_adapter *adap, bool enable)