Disclaimer - this question is not 100% BSP, but I'm hoping someone reading it might have some insights.
I have multiple i.MX6 boards which I support using Poky/Yocto plus meta-fsl-arm*. The problem I'm looking at is on some of them, HDMI works correctly where on others the screen is clipped (overscan). On the SabreLite, using linux-boundary_3.10.53, HDMI works correctly (on all the monitors I have tried). An image of the upper left of the screen is in HDMI-OK.png On SabreSD, using linux-imx_3.10.53, HDMI on a 720p monitor, the image is clipped with upwards of 5% of the pixels missing. This is shown in HDMI-BAD.png I've not yet tried the linux-boundary kernel on the SabreSD, but I expect the same result as I have seen this problem on other boards (internal) that use the linux-boundary kernel. Any insights on what might cause this? About the only thing we can think of is the SabreSD sends its HDMI signals through a level-shifting ESD device whereas the SabreLite manages these signals more directly using FETs and discrete circuitry. Thanks for any ideas -- ------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------
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