i.MX Processors中的主题 Re: How to get 1366x768, 800x600 output over HDMI?

How to get 1366x768, 800x600 output over HDMI?

jiangshao — Mon, 22 Aug 2016 06:10:55 GMT

Dear FAE

I have a imx6dl sabre-sd board(with PMIC)(not fsl original).

The OS is JB4.2.2.

I want to know how to get 1366x768, 800x600 output over HDMI?

BTW,

According to this patch, HDMI can output 1024*768 correctly.

----------------

diff --git a/drivers/video/mxc_hdmi.c b/drivers/video/mxc_hdmi.c

index c5069aa..ed1e084 100644

--- a/drivers/video/mxc_hdmi.c

+++ b/drivers/video/mxc_hdmi.c

@@ -101,7 +101,7 @@ static const struct fb_videomode vga_mode = {

static const struct fb_videomode xga_mode = {

/* 13 1024x768-60 VESA */

NULL, 60, 1024, 768, 15384, 160, 24, 29, 3, 136, 6,

- 0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA

+ 0, FB_VMODE_NONINTERLACED | FB_VMODE_ASPECT_4_3, FB_MODE_IS_VESA

};

static const struct fb_videomode sxga_mode = {

@@ -1796,6 +1796,7 @@ static void mxc_hdmi_edid_rebuild_modelist(struct mxc_hdmi *hdmi)

fb_destroy_modelist(&hdmi->fbi->modelist);

fb_add_videomode(&vga_mode, &hdmi->fbi->modelist);

+ fb_add_videomode(&xga_mode, &hdmi->fbi->modelist);

for (i = 0; i < hdmi->fbi->monspecs.modedb_len; i++) {

Re: How to get 1366x768, 800x600 output over HDMI?

igorpadykov — Mon, 22 Aug 2016 09:42:13 GMT

Hi jiang

hdmi supports only modes which are found in struct fb_videomode,

so one can add timings for 1366x768, 800x600 modes based on datasheet

of these monitors. One can use mentioned 1024*768 fb_videomode as example.

Best regards

igor

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Re: How to get 1366x768, 800x600 output over HDMI?

jiangshao — Tue, 23 Aug 2016 06:06:44 GMT

Thank you for your reply.

I think you are right.

But I don't have the datasheet of these monitors.

I just want to know where can get the values like

"15384, 160, 24, 29, 3, 136, 6,"

Are there typical values?

Re: How to get 1366x768, 800x600 output over HDMI?

igorpadykov — Tue, 23 Aug 2016 06:29:27 GMT

these values should be provided in the datasheet of these monitors.

One can try to find similar monitor datasheets and use them just for luck.

~igor