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| author | Steffen Trumtrar <s.trumtrar@pengutronix.de> | 2012-11-14 14:12:38 +0400 |
|---|---|---|
| committer | Steffen Trumtrar <s.trumtrar@pengutronix.de> | 2013-01-24 12:04:04 +0400 |
| commit | 790890444f591145d3a00623af461c9006e17d51 (patch) | |
| tree | 03b288ca5c98d9cb72b37db4640dc8988017ca06 /drivers/video/fbmon.c | |
| parent | 2db54c72395298a58f29c75ae880be9e478fdbbd (diff) | |
| download | linux-790890444f591145d3a00623af461c9006e17d51.tar.xz | |
fbmon: add of_videomode helpers
Add helper to get fb_videomode from devicetree.
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de>
Acked-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Afzal Mohammed <Afzal@ti.com>
Tested-by: Rob Clark <robclark@gmail.com>
Tested-by: Leela Krishna Amudala <leelakrishna.a@gmail.com>
Diffstat (limited to 'drivers/video/fbmon.c')
| -rw-r--r-- | drivers/video/fbmon.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/video/fbmon.c b/drivers/video/fbmon.c index 17ce135a18fd..94ad0f71383c 100644 --- a/drivers/video/fbmon.c +++ b/drivers/video/fbmon.c @@ -31,6 +31,7 @@ #include <linux/pci.h> #include <linux/slab.h> #include <video/edid.h> +#include <video/of_videomode.h> #include <video/videomode.h> #ifdef CONFIG_PPC_OF #include <asm/prom.h> @@ -1425,6 +1426,47 @@ int fb_videomode_from_videomode(const struct videomode *vm, EXPORT_SYMBOL_GPL(fb_videomode_from_videomode); #endif +#if IS_ENABLED(CONFIG_OF_VIDEOMODE) +static inline void dump_fb_videomode(const struct fb_videomode *m) +{ + pr_debug("fb_videomode = %ux%u@%uHz (%ukHz) %u %u %u %u %u %u %u %u %u\n", + m->xres, m->yres, m->refresh, m->pixclock, m->left_margin, + m->right_margin, m->upper_margin, m->lower_margin, + m->hsync_len, m->vsync_len, m->sync, m->vmode, m->flag); +} + +/** + * of_get_fb_videomode - get a fb_videomode from devicetree + * @np: device_node with the timing specification + * @fb: will be set to the return value + * @index: index into the list of display timings in devicetree + * + * DESCRIPTION: + * This function is expensive and should only be used, if only one mode is to be + * read from DT. To get multiple modes start with of_get_display_timings ond + * work with that instead. + */ +int of_get_fb_videomode(struct device_node *np, struct fb_videomode *fb, + int index) +{ + struct videomode vm; + int ret; + + ret = of_get_videomode(np, &vm, index); + if (ret) + return ret; + + fb_videomode_from_videomode(&vm, fb); + + pr_debug("%s: got %dx%d display mode from %s\n", + of_node_full_name(np), vm.hactive, vm.vactive, np->name); + dump_fb_videomode(fb); + + return 0; +} +EXPORT_SYMBOL_GPL(of_get_fb_videomode); +#endif + #else int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var) { |