[media] adv7604: set CEC address (SPA) in EDID

Signed-off-by: Mats Randgaard <matrandg@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 70 insertions, 13 deletions

diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
index d1de747f4542..d8061c5c30dd 100644
--- a/drivers/media/i2c/adv7604.c
+++ b/drivers/media/i2c/adv7604.c
@@ -72,6 +72,7 @@ struct adv7604_state {
                 u32 present;
                 unsigned blocks;
         } edid;
+        u16 spa_port_a;
         struct v4l2_fract aspect_ratio;
         u32 rgb_quantization_range;
         struct workqueue_struct *work_queues;
@@ -531,9 +532,6 @@ static inline int edid_write_block(struct v4l2_subdev *sd,
 
         v4l2_dbg(2, debug, sd, "%s: write EDID block (%d byte)\n", __func__, len);
 
-        /* Disables I2C access to internal EDID ram from DDC port */
-        rep_write_and_or(sd, 0x77, 0xf0, 0x0);
-
         for (i = 0; !err && i < len; i += I2C_SMBUS_BLOCK_MAX)
                 err = adv_smbus_write_i2c_block_data(state->i2c_edid, i,
                                 I2C_SMBUS_BLOCK_MAX, val + i);
@@ -1623,9 +1621,39 @@ static int adv7604_get_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edi
         return 0;
 }
 
+static int get_edid_spa_location(struct v4l2_subdev *sd, const u8 *edid)
+{
+        u8 d;
+
+        if ((edid[0x7e] != 1) ||
+            (edid[0x80] != 0x02) ||
+            (edid[0x81] != 0x03)) {
+                return -1;
+        }
+
+        /* search Vendor Specific Data Block (tag 3) */
+        d = edid[0x82] & 0x7f;
+        if (d > 4) {
+                int i = 0x84;
+                int end = 0x80 + d;
+
+                do {
+                        u8 tag = edid[i] >> 5;
+                        u8 len = edid[i] & 0x1f;
+
+                        if ((tag == 3) && (len >= 5))
+                                return i + 4;
+                        i += len + 1;
+                } while (i < end);
+        }
+        return -1;
+}
+
 static int adv7604_set_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid)
 {
         struct adv7604_state *state = to_state(sd);
+        int spa_loc = get_edid_spa_location(sd, edid->edid);
+        int tmp = 0;
         int err;
 
         if (edid->pad > ADV7604_EDID_PORT_D)
@@ -1633,16 +1661,20 @@ static int adv7604_set_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edi
         if (edid->start_block != 0)
                 return -EINVAL;
         if (edid->blocks == 0) {
-                /* Pull down the hotplug pin */
+                /* Disable hotplug and I2C access to EDID RAM from DDC port */
                 state->edid.present &= ~(1 << edid->pad);
                 v4l2_subdev_notify(sd, ADV7604_HOTPLUG, (void *)&state->edid.present);
-                /* Disables I2C access to internal EDID ram from DDC port */
-                rep_write_and_or(sd, 0x77, 0xf0, 0x0);
-                state->edid.blocks = 0;
+                rep_write_and_or(sd, 0x77, 0xf0, state->edid.present);
+
                 /* Fall back to a 16:9 aspect ratio */
                 state->aspect_ratio.numerator = 16;
                 state->aspect_ratio.denominator = 9;
-                v4l2_dbg(2, debug, sd, "%s: clear edid\n", __func__);
+
+                if (!state->edid.present)
+                        state->edid.blocks = 0;
+
+                v4l2_dbg(2, debug, sd, "%s: clear EDID pad %d, edid.present = 0x%x\n",
+                                __func__, edid->pad, state->edid.present);
                 return 0;
         }
         if (edid->blocks > 2) {
@@ -1652,19 +1684,45 @@ static int adv7604_set_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edi
         if (!edid->edid)
                 return -EINVAL;
 
+        /* Disable hotplug and I2C access to EDID RAM from DDC port */
         cancel_delayed_work_sync(&state->delayed_work_enable_hotplug);
-        state->edid.present &= ~(1 << edid->pad);
-        v4l2_subdev_notify(sd, ADV7604_HOTPLUG, (void *)&state->edid.present);
+        v4l2_subdev_notify(sd, ADV7604_HOTPLUG, (void *)&tmp);
+        rep_write_and_or(sd, 0x77, 0xf0, 0x00);
+
+        v4l2_dbg(2, debug, sd, "%s: write EDID pad %d, edid.present = 0x%x\n",
+                        __func__, edid->pad, state->edid.present);
+        switch (edid->pad) {
+        case ADV7604_EDID_PORT_A:
+                state->spa_port_a = edid->edid[spa_loc];
+                break;
+        case ADV7604_EDID_PORT_B:
+                rep_write(sd, 0x70, (spa_loc < 0) ? 0 : edid->edid[spa_loc]);
+                rep_write(sd, 0x71, (spa_loc < 0) ? 0 : edid->edid[spa_loc + 1]);
+                break;
+        case ADV7604_EDID_PORT_C:
+                rep_write(sd, 0x72, (spa_loc < 0) ? 0 : edid->edid[spa_loc]);
+                rep_write(sd, 0x73, (spa_loc < 0) ? 0 : edid->edid[spa_loc + 1]);
+                break;
+        case ADV7604_EDID_PORT_D:
+                rep_write(sd, 0x74, (spa_loc < 0) ? 0 : edid->edid[spa_loc]);
+                rep_write(sd, 0x75, (spa_loc < 0) ? 0 : edid->edid[spa_loc + 1]);
+                break;
+        }
+        rep_write(sd, 0x76, (spa_loc < 0) ? 0x00 : spa_loc);
+        rep_write_and_or(sd, 0x77, 0xbf, (spa_loc < 0) ? 0x00 : (spa_loc >> 2) & 0x40);
+
+        if (spa_loc > 0)
+                edid->edid[spa_loc] = state->spa_port_a;
 
         memcpy(state->edid.edid, edid->edid, 128 * edid->blocks);
         state->edid.blocks = edid->blocks;
         state->aspect_ratio = v4l2_calc_aspect_ratio(edid->edid[0x15],
                         edid->edid[0x16]);
-        state->edid.present |= edid->pad;
+        state->edid.present |= 1 << edid->pad;
 
         err = edid_write_block(sd, 128 * edid->blocks, state->edid.edid);
         if (err < 0) {
-                v4l2_err(sd, "error %d writing edid\n", err);
+                v4l2_err(sd, "error %d writing edid pad %d\n", err, edid->pad);
                 return err;
         }
 
@@ -1984,7 +2042,6 @@ static int adv7604_core_init(struct v4l2_subdev *sd)
                                       ADI recommended setting [REF_01, c. 2.3.3] */
         cp_write(sd, 0xc9, 0x2d); /* use prim_mode and vid_std as free run resolution
                                      for digital formats */
-        rep_write(sd, 0x76, 0xc0); /* SPA location for port B, C and D */
 
         /* TODO from platform data */
         afe_write(sd, 0xb5, 0x01);  /* Setting MCLK to 256Fs */