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 */
+ 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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