diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/i2c/adv7604.c | 83 |
1 files changed, 70 insertions, 13 deletions
diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c index d1de747f454..d8061c5c30d 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 */ |