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LVDS clock on i.MX6 in u-boot

Question asked by Geisreiter Andreas on Jul 27, 2015
Latest reply on Oct 8, 2015 by Laszlo Timko

Hi,

 

we are working with self-developed i.MX6 board. Now we have enabled U-Boot splash screen support. It is working well, but we have problems with LVDS interface.

If we configure LVDS we always get 56MHz LVDS clock although we configured 30MHz for LVDS clock via displays structure in the board file:

      .bus  = 0,

      .addr = 0,

      .pixfmt     = IPU_PIX_FMT_RGB24,

      .detect     = NULL,

      .enable     = enable_lvds,

      .mode = {

            .name           = "wvga-lvds",

                .refresh        = 57,

                .xres           = 800,

                .yres           = 480,

                .pixclock       = 33000,

                .left_margin    = 40,

                .right_margin   = 40,

                .upper_margin   = 3,

                .lower_margin   = 80,

                .hsync_len      = 10,

                .vsync_len      = 10,

                .sync           = FB_SYNC_EXT,

                .vmode          = FB_VMODE_NONINTERLACED

 

Has anyone an idea what's going wrong?

 

Best regards,

Andreas

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