Decode and display any received SPD InfoFrame in log-status.
Signed-off-by: Martin Bugge <marbugge@xxxxxxxxx>
---
drivers/media/i2c/adv7842.c | 76 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 76 insertions(+)
diff --git a/drivers/media/i2c/adv7842.c b/drivers/media/i2c/adv7842.c
index 5d79c57..805a117 100644
--- a/drivers/media/i2c/adv7842.c
+++ b/drivers/media/i2c/adv7842.c
@@ -2243,6 +2243,81 @@ static void print_avi_infoframe(struct v4l2_subdev *sd)
v4l2_info(sd, "\t%s %s\n", y10_txt[avi.y10], q10_txt[avi.q10]);
}
+static const char *sdi_txt(u8 code)
+{
+ switch (code) {
+ case 0x00: return "unknown";
+ case 0x01: return "Digital STB";
+ case 0x02: return "DVD player";
+ case 0x03: return "D-VHS";
+ case 0x04: return "HDD Videorecorder";
+ case 0x05: return "DVC";
+ case 0x06: return "DSC";
+ case 0x07: return "Video CD";
+ case 0x08: return "Game";
+ case 0x09: return "PC general";
+ case 0x0a: return "Blu-Ray Disc (BD)";
+ case 0x0b: return "Super Audio CD";
+ }
+ return "Reserved";
+}
+
+static void print_spd_info_frame(struct v4l2_subdev *sd)
+{
+ int i;
+ u8 spd_type;
+ u8 spd_ver;
+ u8 spd_len;
+ u8 spd_crc;
+ u8 buf[32];
+ u8 vn[8];
+ u8 pd[16];
+ u8 sdi;
+
+ if (!(hdmi_read(sd, 0x05) & 0x80)) {
+ v4l2_info(sd, "receive DVI-D signal (SDP infoframe not supported)\n");
+ return;
+ }
+ if (!(io_read(sd, 0x60) & 0x04)) {
+ v4l2_info(sd, "SDP infoframe not received\n");
+ return;
+ }
+
+ if (io_read(sd, 0x88) & 0x40) {
+ v4l2_info(sd, "SPD infoframe checksum error has occurred earlier\n");
+ io_write(sd, 0x8a, 0x40); /* clear SPD_INF_CKS_ERR_RAW */
+ if (io_read(sd, 0x88) & 0x40) {
+ v4l2_info(sd, "SPD infoframe checksum error still present\n");
+ io_write(sd, 0x8a, 0x40); /* clear SPD_INF_CKS_ERR_RAW */
+ }
+ }
+
+ spd_type = infoframe_read(sd, 0xe6) & 0x7f;
+ spd_ver = infoframe_read(sd, 0xe7);
+ spd_len = infoframe_read(sd, 0xe8);
+ spd_crc = infoframe_read(sd, 0x2a);
+
+ v4l2_info(sd, "SPD infoframe type %d, version %d, crc 0x%x, len %d\n",
+ spd_type, spd_ver, spd_crc, spd_len);
+
+ if (spd_type != 0x03)
+ return;
+ if (spd_ver != 0x01)
+ return;
+
+ memset(buf, 0, sizeof(buf));
+ for (i = 0; i < 25 && i < spd_len; i++)
+ buf[i] = infoframe_read(sd, i + 0x2b);
+
+ snprintf(vn, 8, buf);
+ snprintf(pd, 16, buf + 8);
+ sdi = buf[24];
+
+ v4l2_info(sd, "\tVendor Name: %s\n", vn);
+ v4l2_info(sd, "\tProduct Description: %s\n", pd);
+ v4l2_info(sd, "\tSource Device Information: %s (%d)\n", sdi_txt(sdi), sdi);
+}
+
static const char * const prim_mode_txt[] = {
"SDP",
"Component",
@@ -2455,6 +2530,7 @@ static int adv7842_cp_log_status(struct v4l2_subdev *sd)
deep_color_mode_txt[hdmi_read(sd, 0x0b) >> 6]);
print_avi_infoframe(sd);
+ print_spd_info_frame(sd);
return 0;
}
--
1.8.5.3
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