diff options
| author | Hans Verkuil <hans.verkuil@cisco.com> | 2017-08-31 13:41:17 +0200 |
|---|---|---|
| committer | Adam Jackson <ajax@redhat.com> | 2017-09-07 12:13:33 -0400 |
| commit | 9c1817ea8f1092abb212f4256d4a20d57311d952 (patch) | |
| tree | 61fe6bc6390ffe6ae3ddfb103fbf46f660805f67 | |
| parent | d3fc557cd790b2473aa219426fd77eec746f3297 (diff) | |
edid-decode: check Max TMDS Rates
The max TMDS rate in the HDMI VSDB is 340 MHz and the max TMDS
rate in the HDMI Forum VSDB is 0 or in the range 341-600 MHz.
Check for this.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
| -rw-r--r-- | edid-decode.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/edid-decode.c b/edid-decode.c index 5a5fb5b..f106ce5 100644 --- a/edid-decode.c +++ b/edid-decode.c @@ -77,6 +77,8 @@ static int warning_zero_preferred_refresh = 0; static int nonconformant_hf_vsdb_position = 0; static int nonconformant_srgb_chromaticity = 0; static int nonconformant_cea861_640x480 = 0; +static int nonconformant_hdmi_vsdb_tmds_rate = 0; +static int nonconformant_hf_vsdb_tmds_rate = 0; static int min_hor_freq_hz = 0xfffffff; static int max_hor_freq_hz = 0; @@ -1171,8 +1173,11 @@ cea_hdmi_block(unsigned char *x) printf(" DVI_Dual\n"); } - if (length > 6) + if (length > 6) { printf(" Maximum TMDS clock: %dMHz\n", x[7] * 5); + if (x[7] * 5 > 340) + nonconformant_hdmi_vsdb_tmds_rate = 1; + } /* XXX the walk here is really ugly, and needs to be length-checked */ if (length > 7) { @@ -1328,8 +1333,13 @@ cea_hf_block(unsigned char *x) { printf(" (HDMI Forum)\n"); printf(" Version: %u\n", x[4]); - if (x[5]) - printf(" Maximum TMDS Character Rate: %uMHz\n", x[5] * 5); + if (x[5]) { + unsigned rate = x[5] * 5; + + printf(" Maximum TMDS Character Rate: %uMHz\n", rate); + if ((rate && rate <= 340) || rate > 600) + nonconformant_hf_vsdb_tmds_rate = 1; + } if (x[6] & 0x80) printf(" SCDC Present\n"); if (x[6] & 0x40) @@ -2404,6 +2414,8 @@ int main(int argc, char **argv) if (claims_one_point_three) { if (nonconformant_digital_display || nonconformant_hf_vsdb_position || + nonconformant_hdmi_vsdb_tmds_rate || + nonconformant_hf_vsdb_tmds_rate || nonconformant_srgb_chromaticity || nonconformant_cea861_640x480 || !has_valid_string_termination || @@ -2425,6 +2437,10 @@ int main(int argc, char **argv) "\tand/or in the SVD list (VIC 1)\n"); if (nonconformant_hf_vsdb_position) printf("\tHDMI Forum VSDB did not immediately follow the HDMI VSDB\n"); + if (nonconformant_hdmi_vsdb_tmds_rate) + printf("\tHDMI VSDB Max TMDS rate is > 340\n"); + if (nonconformant_hf_vsdb_tmds_rate) + printf("\tHDMI Forum VSDB Max TMDS rate is > 0 and <= 340 or > 600\n"); if (!has_name_descriptor) printf("\tMissing name descriptor\n"); else if (!name_descriptor_terminated) |