> On 9 Feb 2018, at 15.07, Pekka Paalanen <ppaala...@gmail.com> wrote:
>
> From: Pekka Paalanen <pekka.paala...@collabora.co.uk>
>
> Move it into to a new function. Following patches want to compute it
> elsewhere as well.
>
> No functional changes.
>
> Signed-off-by: Pekka Paalanen <pekka.paala...@collabora.co.uk>
> ---
> libweston/compositor-drm.c | 33 ++++++++++++++++++++-------------
> 1 file changed, 20 insertions(+), 13 deletions(-)
>
> diff --git a/libweston/compositor-drm.c b/libweston/compositor-drm.c
> index 23ffb005..1897f455 100644
> --- a/libweston/compositor-drm.c
> +++ b/libweston/compositor-drm.c
> @@ -3699,6 +3699,25 @@ destroy_sprites(struct drm_backend *b)
> drm_plane_destroy(plane);
> }
>
> +static uint32_t
> +drm_refresh_rate_mHz(const drmModeModeInfo *info)
> +{
> + uint64_t refresh;
> +
> + /* Calculate higher precision (mHz) refresh rate */
Nit: Is it really milli-hertz?
> + refresh = (info->clock * 1000000LL / info->htotal +
> + info->vtotal / 2) / info->vtotal;
> +
> + if (info->flags & DRM_MODE_FLAG_INTERLACE)
> + refresh *= 2;
> + if (info->flags & DRM_MODE_FLAG_DBLSCAN)
> + refresh /= 2;
> + if (info->vscan > 1)
> + refresh /= info->vscan;
> +
> + return refresh;
> +}
> +
> /**
> * Add a mode to output's mode list
> *
> @@ -3713,7 +3732,6 @@ static struct drm_mode *
> drm_output_add_mode(struct drm_output *output, const drmModeModeInfo *info)
> {
> struct drm_mode *mode;
> - uint64_t refresh;
>
> mode = malloc(sizeof *mode);
> if (mode == NULL)
> @@ -3723,18 +3741,7 @@ drm_output_add_mode(struct drm_output *output, const
> drmModeModeInfo *info)
> mode->base.width = info->hdisplay;
> mode->base.height = info->vdisplay;
>
> - /* Calculate higher precision (mHz) refresh rate */
> - refresh = (info->clock * 1000000LL / info->htotal +
> - info->vtotal / 2) / info->vtotal;
> -
> - if (info->flags & DRM_MODE_FLAG_INTERLACE)
> - refresh *= 2;
> - if (info->flags & DRM_MODE_FLAG_DBLSCAN)
> - refresh /= 2;
> - if (info->vscan > 1)
> - refresh /= info->vscan;
> -
> - mode->base.refresh = refresh;
> + mode->base.refresh = drm_refresh_rate_mHz(info);
> mode->mode_info = *info;
> mode->blob_id = 0;
>
> --
> 2.13.6
>
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