This function will be used by the universal plane helpers and may also
be useful for individual drivers.
Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
---
drivers/gpu/drm/drm_crtc.c | 20 +++++++++++++-------
include/drm/drm_crtc.h | 4 ++++
2 files changed, 17 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 7def92b..99e6b22 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -2186,14 +2186,19 @@ int drm_mode_set_config_internal(struct drm_mode_set *set)
}
EXPORT_SYMBOL(drm_mode_set_config_internal);
-/*
- * Checks that the framebuffer is big enough for the CRTC viewport
- * (x, y, hdisplay, vdisplay)
+/**
+ * drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
+ * CRTC viewport
+ * @crtc: CRTC that framebuffer will be displayed on
+ * @x: x panning
+ * @y: y panning
+ * @mode: mode that framebuffer will be displayed under
+ * @fb: framebuffer to check size of
*/
-static int drm_crtc_check_viewport(const struct drm_crtc *crtc,
- int x, int y,
- const struct drm_display_mode *mode,
- const struct drm_framebuffer *fb)
+int drm_crtc_check_viewport(const struct drm_crtc *crtc,
+ int x, int y,
+ const struct drm_display_mode *mode,
+ const struct drm_framebuffer *fb)
{
int hdisplay, vdisplay;
@@ -2224,6 +2229,7 @@ static int drm_crtc_check_viewport(const struct drm_crtc *crtc,
return 0;
}
+EXPORT_SYMBOL(drm_crtc_check_viewport);
/**
* drm_mode_setcrtc - set CRTC configuration
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 5b8847a..79a5a83 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -882,6 +882,10 @@ extern int drm_plane_init(struct drm_device *dev,
bool priv);
extern void drm_plane_cleanup(struct drm_plane *plane);
extern void drm_plane_force_disable(struct drm_plane *plane);
+extern int drm_crtc_check_viewport(const struct drm_crtc *crtc,
+ int x, int y,
+ const struct drm_display_mode *mode,
+ const struct drm_framebuffer *fb);
extern void drm_encoder_cleanup(struct drm_encoder *encoder);
--
1.8.5.1
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