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Subject: edid-decode: ignore failed Ri' reads Author: Hans Verkuil <hverk...@xs4all.nl> Date: Fri Jan 17 11:50:28 2025 +0100 --i2c-hdcp-ri should ignore invalid Ri' reads. Signed-off-by: Hans Verkuil <hverk...@xs4all.nl> utils/edid-decode/ddc.cpp | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) --- http://git.linuxtv.org/cgit.cgi/v4l-utils.git/commit/?id=1316a80455ef70889bea89491f37cd69170f3ee7 diff --git a/utils/edid-decode/ddc.cpp b/utils/edid-decode/ddc.cpp index eacea38d919e..8d864a9bea7a 100644 --- a/utils/edid-decode/ddc.cpp +++ b/utils/edid-decode/ddc.cpp @@ -465,25 +465,27 @@ int read_hdcp_ri(int adapter_fd, double ri_time) __u64 last_ts = current_ts(); bool first = true; __u16 ri = 0; + __u16 last_ri = 0; clock_gettime(CLOCK_MONOTONIC, &start_monotonic); gettimeofday(&start_timeofday, nullptr); while (1) { __u64 ts = current_ts(); - __u16 last = ri; printf("Timestamp: %s", ts2s(ts).c_str()); - if (!read_hdcp_ri_register(adapter_fd, &ri)) - printf(" Ri': %04x", ri); - if (!first && ri != last) { - printf(" (changed from %04x after %llu ms)", - last, (ts - last_ts) / 1000000); - last_ts = ts; + if (!read_hdcp_ri_register(adapter_fd, &ri)) { + printf(" Ri': 0x%04x", ri); + if (!first && ri != last_ri) { + printf(" (changed from 0x%04x after %llu ms)", + last_ri, (ts - last_ts) / 1000000); + last_ts = ts; + last_ri = ri; + } + first = false; } printf("\n"); fflush(stdout); - first = false; usleep(ri_time * 1000000); } return 0;
