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video: fix EDID standard timing decode

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Fix standard timing decoding and the red chromaticity Y field.

Signed-off-by: Emre Cecanpunar <emreleno@gmail.com>
This commit is contained in:
Emre Cecanpunar 2026-07-17 12:55:54 +03:00 • committed by Alan C. Assis
parent 90c9ae5680
commit 4dfca78d41
1 changed files with 6 additions and 4 deletions
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10
video/videomode/edid_parse.c
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@ -125,6 +125,7 @@ static bool edid_std_timing(FAR const uint8_t *stdtim,
unsigned x; unsigned x;
unsigned y; unsigned y;
unsigned f; unsigned f;
uint8_t info;
if ((stdtim[0] == 1 && stdtim[1] == 1) || if ((stdtim[0] == 1 && stdtim[1] == 1) ||
(stdtim[0] == 0 && stdtim[1] == 0) || (stdtim[0] == 0 && stdtim[1] == 0) ||
@ -133,8 +134,9 @@ static bool edid_std_timing(FAR const uint8_t *stdtim,
return false; return false;
} }
x = stdtim[EDID_STDTIMING_XRES_OFFSET]; x = (stdtim[EDID_STDTIMING_XRES_OFFSET] + 31) * 8;
switch (x & EDID_STDTIMING_ASPECT_MASK) info = stdtim[EDID_STDTIMING_INFO_OFFSET];
switch (info & EDID_STDTIMING_ASPECT_MASK)
{ {
case EDID_STDTIMING_ASPECT_16_10: case EDID_STDTIMING_ASPECT_16_10:
y = x * 10 / 16; y = x * 10 / 16;
@ -154,7 +156,7 @@ static bool edid_std_timing(FAR const uint8_t *stdtim,
break; break;
} }
f = stdtim[EDID_STDTIMING_INFO_OFFSET]; f = (info & ~EDID_STDTIMING_ASPECT_MASK) + 60;
/* First try to lookup the mode as a DMT timing */ /* First try to lookup the mode as a DMT timing */
@ -499,7 +501,7 @@ int edid_parse(FAR const uint8_t *data, FAR struct edid_info_s *edid)
edid->edid_features = data[EDID_DISPLAY_FEATURES_OFFSET]; edid->edid_features = data[EDID_DISPLAY_FEATURES_OFFSET];
edid->edid_chroma.ec_redx = EDID_CHROMA_RED_X(data); edid->edid_chroma.ec_redx = EDID_CHROMA_RED_X(data);
edid->edid_chroma.ec_redy = EDID_CHROMA_RED_X(data); edid->edid_chroma.ec_redy = EDID_CHROMA_RED_Y(data);
edid->edid_chroma.ec_greenx = EDID_CHROMA_GREEN_X(data); edid->edid_chroma.ec_greenx = EDID_CHROMA_GREEN_X(data);
edid->edid_chroma.ec_greeny = EDID_CHROMA_GREEN_Y(data); edid->edid_chroma.ec_greeny = EDID_CHROMA_GREEN_Y(data);
edid->edid_chroma.ec_bluex = EDID_CHROMA_BLUE_X(data); edid->edid_chroma.ec_bluex = EDID_CHROMA_BLUE_X(data);