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videomodes: add helper function to convert from ctfb to display_timing 

This function converts from "struct ctf_res_modes" to
"struct display_timing".

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
This commit is contained in:
Giulio Benetti 2020-04-08 17:10:11 +02:00 committed by Stefano Babic
parent ecd8497bcb
commit 10374da777
2 changed files with 40 additions and 0 deletions
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29
drivers/video/videomodes.c
View File

@ -444,3 +444,32 @@ int video_edid_dtd_to_ctfb_res_modes(struct edid_detailed_timing *t,
return 0;
}
void video_ctfb_mode_to_display_timing(const struct ctfb_res_modes *mode,
struct display_timing *timing)
{
timing->pixelclock.typ = mode->pixclock_khz * 1000;
timing->hactive.typ = mode->xres;
timing->hfront_porch.typ = mode->right_margin;
timing->hback_porch.typ = mode->left_margin;
timing->hsync_len.typ = mode->hsync_len;
timing->vactive.typ = mode->yres;
timing->vfront_porch.typ = mode->lower_margin;
timing->vback_porch.typ = mode->upper_margin;
timing->vsync_len.typ = mode->vsync_len;
timing->flags = 0;
if (mode->sync & FB_SYNC_HOR_HIGH_ACT)
timing->flags |= DISPLAY_FLAGS_HSYNC_HIGH;
else
timing->flags |= DISPLAY_FLAGS_HSYNC_LOW;
if (mode->sync & FB_SYNC_VERT_HIGH_ACT)
timing->flags |= DISPLAY_FLAGS_VSYNC_HIGH;
else
timing->flags |= DISPLAY_FLAGS_VSYNC_LOW;
if (mode->vmode == FB_VMODE_INTERLACED)
timing->flags |= DISPLAY_FLAGS_INTERLACED;
}

11
drivers/video/videomodes.h
View File

@ -92,3 +92,14 @@ int video_get_option_int(const char *options, const char *name, int def);
int video_edid_dtd_to_ctfb_res_modes(struct edid_detailed_timing *t,
struct ctfb_res_modes *mode);
/**
* video_ctfb_mode_to_display_timing() - Convert a ctfb(Cathode Tube Frame
* Buffer)_res_modes struct to a
* display_timing struct.
*
* @mode: Input ctfb_res_modes structure pointer to be converted
* from
* @timing: Output display_timing structure pointer to be converted to
*/
void video_ctfb_mode_to_display_timing(const struct ctfb_res_modes *mode,
struct display_timing *timing);