media: adv7604: add CEC support for adv7611/adv7612

The CEC IP is very similar between the three HDMI receivers, but
not identical. Add support for all three variants.

Tested with an adv7604 and an adv7612.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
index 9eb7c70..8878627 100644 (file)
--- a/drivers/media/i2c/adv7604.c
+++ b/drivers/media/i2c/adv7604.c
@@ -114,6 +114,11 @@ struct adv76xx_chip_info {
        unsigned int fmt_change_digital_mask;
        unsigned int cp_csc;
 
+       unsigned int cec_irq_status;
+       unsigned int cec_rx_enable;
+       unsigned int cec_rx_enable_mask;
+       bool cec_irq_swap;
+
        const struct adv76xx_format_info *formats;
        unsigned int nformats;
 
@@ -2003,10 +2008,11 @@ static void adv76xx_cec_tx_raw_status(struct v4l2_subdev *sd, u8 tx_raw_status)
 static void adv76xx_cec_isr(struct v4l2_subdev *sd, bool *handled)
 {
        struct adv76xx_state *state = to_state(sd);
+       const struct adv76xx_chip_info *info = state->info;
        u8 cec_irq;
 
        /* cec controller */
-       cec_irq = io_read(sd, 0x4d) & 0x0f;
+       cec_irq = io_read(sd, info->cec_irq_status) & 0x0f;
        if (!cec_irq)
                return;
 
@@ -2024,15 +2030,21 @@ static void adv76xx_cec_isr(struct v4l2_subdev *sd, bool *handled)
 
                        for (i = 0; i < msg.len; i++)
                                msg.msg[i] = cec_read(sd, i + 0x15);
-                       cec_write(sd, 0x26, 0x01); /* re-enable rx */
+                       cec_write(sd, info->cec_rx_enable,
+                                 info->cec_rx_enable_mask); /* re-enable rx */
                        cec_received_msg(state->cec_adap, &msg);
                }
        }
 
-       /* note: the bit order is swapped between 0x4d and 0x4e */
-       cec_irq = ((cec_irq & 0x08) >> 3) | ((cec_irq & 0x04) >> 1) |
-                 ((cec_irq & 0x02) << 1) | ((cec_irq & 0x01) << 3);
-       io_write(sd, 0x4e, cec_irq);
+       if (info->cec_irq_swap) {
+               /*
+                * Note: the bit order is swapped between 0x4d and 0x4e
+                * on adv7604
+                */
+               cec_irq = ((cec_irq & 0x08) >> 3) | ((cec_irq & 0x04) >> 1) |
+                         ((cec_irq & 0x02) << 1) | ((cec_irq & 0x01) << 3);
+       }
+       io_write(sd, info->cec_irq_status + 1, cec_irq);
 
        if (handled)
                *handled = true;
@@ -2041,6 +2053,7 @@ static void adv76xx_cec_isr(struct v4l2_subdev *sd, bool *handled)
 static int adv76xx_cec_adap_enable(struct cec_adapter *adap, bool enable)
 {
        struct adv76xx_state *state = cec_get_drvdata(adap);
+       const struct adv76xx_chip_info *info = state->info;
        struct v4l2_subdev *sd = &state->sd;
 
        if (!state->cec_enabled_adap && enable) {
@@ -2052,11 +2065,11 @@ static int adv76xx_cec_adap_enable(struct cec_adapter *adap, bool enable)
                /* tx: arbitration lost */
                /* tx: retry timeout */
                /* rx: ready */
-               io_write_clr_set(sd, 0x50, 0x0f, 0x0f);
-               cec_write(sd, 0x26, 0x01);            /* enable rx */
+               io_write_clr_set(sd, info->cec_irq_status + 3, 0x0f, 0x0f);
+               cec_write(sd, info->cec_rx_enable, info->cec_rx_enable_mask);
        } else if (state->cec_enabled_adap && !enable) {
                /* disable cec interrupts */
-               io_write_clr_set(sd, 0x50, 0x0f, 0x00);
+               io_write_clr_set(sd, info->cec_irq_status + 3, 0x0f, 0x00);
                /* disable address mask 1-3 */
                cec_write_clr_set(sd, 0x27, 0x70, 0x00);
                /* power down cec section */
@@ -2221,6 +2234,16 @@ static int adv76xx_isr(struct v4l2_subdev *sd, u32 status, bool *handled)
        return 0;
 }
 
+static irqreturn_t adv76xx_irq_handler(int irq, void *dev_id)
+{
+       struct adv76xx_state *state = dev_id;
+       bool handled = false;
+
+       adv76xx_isr(&state->sd, 0, &handled);
+
+       return handled ? IRQ_HANDLED : IRQ_NONE;
+}
+
 static int adv76xx_get_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid)
 {
        struct adv76xx_state *state = to_state(sd);
@@ -2960,6 +2983,10 @@ static const struct adv76xx_chip_info adv76xx_chip_info[] = {
                .cable_det_mask = 0x1e,
                .fmt_change_digital_mask = 0xc1,
                .cp_csc = 0xfc,
+               .cec_irq_status = 0x4d,
+               .cec_rx_enable = 0x26,
+               .cec_rx_enable_mask = 0x01,
+               .cec_irq_swap = true,
                .formats = adv7604_formats,
                .nformats = ARRAY_SIZE(adv7604_formats),
                .set_termination = adv7604_set_termination,
@@ -3006,6 +3033,9 @@ static const struct adv76xx_chip_info adv76xx_chip_info[] = {
                .cable_det_mask = 0x01,
                .fmt_change_digital_mask = 0x03,
                .cp_csc = 0xf4,
+               .cec_irq_status = 0x93,
+               .cec_rx_enable = 0x2c,
+               .cec_rx_enable_mask = 0x02,
                .formats = adv7611_formats,
                .nformats = ARRAY_SIZE(adv7611_formats),
                .set_termination = adv7611_set_termination,
@@ -3047,6 +3077,9 @@ static const struct adv76xx_chip_info adv76xx_chip_info[] = {
                .cable_det_mask = 0x01,
                .fmt_change_digital_mask = 0x03,
                .cp_csc = 0xf4,
+               .cec_irq_status = 0x93,
+               .cec_rx_enable = 0x2c,
+               .cec_rx_enable_mask = 0x02,
                .formats = adv7612_formats,
                .nformats = ARRAY_SIZE(adv7612_formats),
                .set_termination = adv7611_set_termination,
@@ -3134,7 +3167,7 @@ static int adv76xx_parse_dt(struct adv76xx_state *state)
                state->pdata.insert_av_codes = 1;
 
        /* Disable the interrupt for now as no DT-based board uses it. */
-       state->pdata.int1_config = ADV76XX_INT1_CONFIG_DISABLED;
+       state->pdata.int1_config = ADV76XX_INT1_CONFIG_ACTIVE_HIGH;
 
        /* Hardcode the remaining platform data fields. */
        state->pdata.disable_pwrdnb = 0;
@@ -3517,6 +3550,16 @@ static int adv76xx_probe(struct i2c_client *client,
        if (err)
                goto err_entity;
 
+       if (client->irq) {
+               err = devm_request_threaded_irq(&client->dev,
+                                               client->irq,
+                                               NULL, adv76xx_irq_handler,
+                                               IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
+                                               client->name, state);
+               if (err)
+                       goto err_entity;
+       }
+
 #if IS_ENABLED(CONFIG_VIDEO_ADV7604_CEC)
        state->cec_adap = cec_allocate_adapter(&adv76xx_cec_adap_ops,
                state, dev_name(&client->dev),