From: Priit Laes priit.laes@paf.com

Current EDID detailed timing parser errors out when either horizontal or vertical pulse sync width is 0, thus not allowing a display with EDID listed below work properly.

Same EDID works ok within Linux although it warns about these two fields being 0. Therefore relax the checks a bit so we can actually use this the screen.

Of-course, this is somewhat quirky HDMI display with following anti-features: - HPD pin is not usable - although resolution is 640x480, only top 240 pixels are visible

$ xxd -p display.edid 00ffffffffffff0005a1e00301000000150f0103800f05780a0f6ea05748 9a2610474f200000010101010101010101010101010101012a08804520e0 0b1020004000953600000018000000fd0034441a2403000a202020202020 0000001000310a20202020202020202020200000001000002a4030701300 782d1100001e006b

$ edid-decode display.edid EDID version: 1.3 Manufacturer: AMA Model 3e0 Serial Number 1 Digital display Maximum image size: 15 cm x 5 cm Gamma: 2.20 RGB color display First detailed timing is preferred timing Display x,y Chromaticity: Red: 0.6250, 0.3398 Green: 0.2841, 0.6044 Blue: 0.1494, 0.0644 White: 0.2802, 0.3105 Established timings supported: 640x480@60Hz 4:3 HorFreq: 31469 Hz Clock: 25.175 MHz Standard timings supported: Detailed mode: Clock 20.900 MHz, 149 mm x 54 mm 640 672 672 709 hborder 0 480 484 484 491 vborder 0 -hsync -vsync VertFreq: 60 Hz, HorFreq: 29478 Hz Monitor ranges (GTF): 52-68Hz V, 26-36kHz H, max dotclock 30MHz Dummy block Dummy block Checksum: 0x6b (valid)

Signed-off-by: Priit Laes priit.laes@paf.com --- drivers/video/videomodes.c | 2 -- 1 file changed, 2 deletions(-)

diff --git a/drivers/video/videomodes.c b/drivers/video/videomodes.c index 74bafff011..1cfeaa980f 100644 --- a/drivers/video/videomodes.c +++ b/drivers/video/videomodes.c @@ -396,9 +396,7 @@ int video_edid_dtd_to_ctfb_res_modes(struct edid_detailed_timing *t, EDID_DETAILED_TIMING_VERTICAL_ACTIVE(*t) == 0 || EDID_DETAILED_TIMING_VERTICAL_BLANKING(*t) == 0 || EDID_DETAILED_TIMING_HSYNC_OFFSET(*t) == 0 || - EDID_DETAILED_TIMING_HSYNC_PULSE_WIDTH(*t) == 0 || EDID_DETAILED_TIMING_VSYNC_OFFSET(*t) == 0 || - EDID_DETAILED_TIMING_VSYNC_PULSE_WIDTH(*t) == 0 || /* 3d formats are not supported*/ EDID_DETAILED_TIMING_FLAG_STEREO(*t) != 0) return -EINVAL;