[media] media: adv7604: reduce support to first (digital) input

Using adv7611_read_cable_det() for ADV7612 means that full
support for '.max_port = ADV7604_PAD_HDMI_PORT_B,' isn't available
due to the need for multiple port reads to determine cable detection,
and an agreed mechanism for communicating the separate statuses.

This patch replaces adv7611_read_cable_det() with a functionally
identical copy, commented appropriately.

Earlier submissions [leading to commit 8331d30b] also set .cp_csc,
which is used in a cp_read() call within adv76xx_log_status().

Signed-off-by: William Towle <william.towle@codethink.co.uk>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
index 0587d27..2524184 100644 (file)
--- a/drivers/media/i2c/adv7604.c
+++ b/drivers/media/i2c/adv7604.c
@@ -877,6 +877,16 @@ static unsigned int adv7611_read_cable_det(struct v4l2_subdev *sd)
        return value & 1;
 }
 
+static unsigned int adv7612_read_cable_det(struct v4l2_subdev *sd)
+{
+       /*  Reads CABLE_DET_A_RAW. For input B support, need to
+        *  account for bit 7 [MSB] of 0x6a (ie. CABLE_DET_B_RAW)
+        */
+       u8 value = io_read(sd, 0x6f);
+
+       return value & 1;
+}
+
 static int adv76xx_s_detect_tx_5v_ctrl(struct v4l2_subdev *sd)
 {
        struct adv76xx_state *state = to_state(sd);
@@ -2728,20 +2738,21 @@ static const struct adv76xx_chip_info adv76xx_chip_info[] = {
        [ADV7612] = {
                .type = ADV7612,
                .has_afe = false,
-               .max_port = ADV7604_PAD_HDMI_PORT_B,
-               .num_dv_ports = 2,
+               .max_port = ADV76XX_PAD_HDMI_PORT_A,    /* B not supported */
+               .num_dv_ports = 1,                      /* normally 2 */
                .edid_enable_reg = 0x74,
                .edid_status_reg = 0x76,
                .lcf_reg = 0xa3,
                .tdms_lock_mask = 0x43,
                .cable_det_mask = 0x01,
                .fmt_change_digital_mask = 0x03,
+               .cp_csc = 0xf4,
                .formats = adv7612_formats,
                .nformats = ARRAY_SIZE(adv7612_formats),
                .set_termination = adv7611_set_termination,
                .setup_irqs = adv7612_setup_irqs,
                .read_hdmi_pixelclock = adv7611_read_hdmi_pixelclock,
-               .read_cable_det = adv7611_read_cable_det,
+               .read_cable_det = adv7612_read_cable_det,
                .recommended_settings = {
                    [1] = adv7612_recommended_settings_hdmi,
                },