Hi Maxime,
On Fri, Jul 29, 2022 at 6:37 PM Maxime Ripard <maxime@xxxxxxxxxx> wrote:
> Our new tv mode option allows to specify the TV mode from a property.
> However, it can still be useful, for example to avoid any boot time
> artifact, to set that property directly from the kernel command line.
>
> Let's add some code to allow it, and some unit tests to exercise that code.
>
> Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
Thanks for your patch!
> --- a/drivers/gpu/drm/drm_modes.c
> +++ b/drivers/gpu/drm/drm_modes.c
> @@ -1677,6 +1677,80 @@ static int drm_mode_parse_panel_orientation(const char *delim,
> return 0;
> }
>
> +#define TV_OPTION_EQUAL(value, len, option) \
> + ((strlen(option) == len) && !strncmp(value, option, len))
> +
> +static int drm_mode_parse_tv_mode(const char *delim,
> + struct drm_cmdline_mode *mode)
> +{
> + const char *value;
> + unsigned int len;
> +
> + if (*delim != '=')
> + return -EINVAL;
> +
> + value = delim + 1;
> + delim = strchr(value, ',');
> + if (!delim)
> + delim = value + strlen(value);
> +
> + len = delim - value;
> + if (TV_OPTION_EQUAL(value, len, "NTSC-443"))
> + mode->tv_mode = DRM_MODE_TV_NORM_NTSC_443;
> + else if (TV_OPTION_EQUAL(value, len, "NTSC-J"))
> + mode->tv_mode = DRM_MODE_TV_NORM_NTSC_J;
> + else if (TV_OPTION_EQUAL(value, len, "NTSC-M"))
> + mode->tv_mode = DRM_MODE_TV_NORM_NTSC_M;
[...]
You already have the array tv_norm_values[] from "[PATCH v1 05/35]
drm/connector: Add TV standard property". Can't you export that, and
loop over that array instead?
> + else if (TV_OPTION_EQUAL(value, len, "HD480I"))
> + mode->tv_mode = DRM_MODE_TV_NORM_HD480I;
> + else if (TV_OPTION_EQUAL(value, len, "HD480P"))
> + mode->tv_mode = DRM_MODE_TV_NORM_HD480P;
> + else if (TV_OPTION_EQUAL(value, len, "HD576I"))
> + mode->tv_mode = DRM_MODE_TV_NORM_HD576I;
> + else if (TV_OPTION_EQUAL(value, len, "HD576P"))
> + mode->tv_mode = DRM_MODE_TV_NORM_HD576P;
> + else if (TV_OPTION_EQUAL(value, len, "HD720P"))
> + mode->tv_mode = DRM_MODE_TV_NORM_HD720P;
> + else if (TV_OPTION_EQUAL(value, len, "HD1080I"))
> + mode->tv_mode = DRM_MODE_TV_NORM_HD1080I;
The names in tv_norm_values[] use lower-case, while you use upper-case
here.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
