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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2014-01-08 20:26:55 -0300
committerMauro Carvalho Chehab <m.chehab@samsung.com>2014-05-25 12:52:33 -0300
commit4a2ccdd257903a63d218cab6916486c30bee453e (patch)
treec8f855a5934030d16b85718f953fa754dafcdb97
parent51182a945c3e267b9183643da3e6e4642fbe6cf2 (diff)
[media] adv7604: Cache register contents when reading multiple bits
When extracting multiple bits from a single register read the register once and extract the bits on the read value. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
-rw-r--r--drivers/media/i2c/adv7604.c33
1 files changed, 20 insertions, 13 deletions
diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
index da256ddf06d3..f9503d2d1ed0 100644
--- a/drivers/media/i2c/adv7604.c
+++ b/drivers/media/i2c/adv7604.c
@@ -1207,6 +1207,8 @@ static int stdi2dv_timings(struct v4l2_subdev *sd,
static int read_stdi(struct v4l2_subdev *sd, struct stdi_readback *stdi)
{
+ u8 polarity;
+
if (no_lock_stdi(sd) || no_lock_sspd(sd)) {
v4l2_dbg(2, debug, sd, "%s: STDI and/or SSPD not locked\n", __func__);
return -1;
@@ -1219,11 +1221,12 @@ static int read_stdi(struct v4l2_subdev *sd, struct stdi_readback *stdi)
stdi->interlaced = io_read(sd, 0x12) & 0x10;
/* read SSPD */
- if ((cp_read(sd, 0xb5) & 0x03) == 0x01) {
- stdi->hs_pol = ((cp_read(sd, 0xb5) & 0x10) ?
- ((cp_read(sd, 0xb5) & 0x08) ? '+' : '-') : 'x');
- stdi->vs_pol = ((cp_read(sd, 0xb5) & 0x40) ?
- ((cp_read(sd, 0xb5) & 0x20) ? '+' : '-') : 'x');
+ polarity = cp_read(sd, 0xb5);
+ if ((polarity & 0x03) == 0x01) {
+ stdi->hs_pol = polarity & 0x10
+ ? (polarity & 0x08 ? '+' : '-') : 'x';
+ stdi->vs_pol = polarity & 0x40
+ ? (polarity & 0x20 ? '+' : '-') : 'x';
} else {
stdi->hs_pol = 'x';
stdi->vs_pol = 'x';
@@ -1881,6 +1884,8 @@ static int adv7604_log_status(struct v4l2_subdev *sd)
struct v4l2_dv_timings timings;
struct stdi_readback stdi;
u8 reg_io_0x02 = io_read(sd, 0x02);
+ u8 edid_enabled;
+ u8 cable_det;
static const char * const csc_coeff_sel_rb[16] = {
"bypassed", "YPbPr601 -> RGB", "reserved", "YPbPr709 -> RGB",
@@ -1910,20 +1915,22 @@ static int adv7604_log_status(struct v4l2_subdev *sd)
v4l2_info(sd, "-----Chip status-----\n");
v4l2_info(sd, "Chip power: %s\n", no_power(sd) ? "off" : "on");
+ edid_enabled = rep_read(sd, 0x7d);
v4l2_info(sd, "EDID enabled port A: %s, B: %s, C: %s, D: %s\n",
- ((rep_read(sd, 0x7d) & 0x01) ? "Yes" : "No"),
- ((rep_read(sd, 0x7d) & 0x02) ? "Yes" : "No"),
- ((rep_read(sd, 0x7d) & 0x04) ? "Yes" : "No"),
- ((rep_read(sd, 0x7d) & 0x08) ? "Yes" : "No"));
+ ((edid_enabled & 0x01) ? "Yes" : "No"),
+ ((edid_enabled & 0x02) ? "Yes" : "No"),
+ ((edid_enabled & 0x04) ? "Yes" : "No"),
+ ((edid_enabled & 0x08) ? "Yes" : "No"));
v4l2_info(sd, "CEC: %s\n", !!(cec_read(sd, 0x2a) & 0x01) ?
"enabled" : "disabled");
v4l2_info(sd, "-----Signal status-----\n");
+ cable_det = io_read(sd, 0x6f);
v4l2_info(sd, "Cable detected (+5V power) port A: %s, B: %s, C: %s, D: %s\n",
- ((io_read(sd, 0x6f) & 0x10) ? "Yes" : "No"),
- ((io_read(sd, 0x6f) & 0x08) ? "Yes" : "No"),
- ((io_read(sd, 0x6f) & 0x04) ? "Yes" : "No"),
- ((io_read(sd, 0x6f) & 0x02) ? "Yes" : "No"));
+ ((cable_det & 0x10) ? "Yes" : "No"),
+ ((cable_det & 0x08) ? "Yes" : "No"),
+ ((cable_det & 0x04) ? "Yes" : "No"),
+ ((cable_det & 0x02) ? "Yes" : "No"));
v4l2_info(sd, "TMDS signal detected: %s\n",
no_signal_tmds(sd) ? "false" : "true");
v4l2_info(sd, "TMDS signal locked: %s\n",

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