Implementing the function "mode_set_base" for i.MX6 IPU enables the
fast-path in function drm_crtc_helper_set_config. The fast-path is used
when flag 'mode_changed' is false and flag 'fb_changed' is true.
The fast-patch is needed for applications using the legcay framebuffer
ioctl FBIOPAN_DISPLAY for buffer flipping. When the fast-patch is not
present, the ioctl FBIOPAN_DISPLAY causes a complete mode set which is
too interruptive.
Signed-off-by: Stefan Christ <s.christ@xxxxxxxxx>
---
drivers/gpu/drm/imx/ipuv3-crtc.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/imx/ipuv3-crtc.c b/drivers/gpu/drm/imx/ipuv3-crtc.c
index fc04041..9858a57 100644
--- a/drivers/gpu/drm/imx/ipuv3-crtc.c
+++ b/drivers/gpu/drm/imx/ipuv3-crtc.c
@@ -234,6 +234,15 @@ static const struct drm_crtc_funcs ipu_crtc_funcs = {
.page_flip = ipu_page_flip,
};
+int ipu_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
+ struct drm_framebuffer *old_fb)
+{
+ struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
+ struct ipu_plane *plane = ipu_crtc->plane[0];
+
+ return ipu_plane_set_base(plane, crtc->primary->fb, x, y);
+}
+
static int ipu_crtc_mode_set(struct drm_crtc *crtc,
struct drm_display_mode *orig_mode,
struct drm_display_mode *mode,
@@ -378,6 +387,7 @@ static const struct drm_crtc_helper_funcs ipu_helper_funcs = {
.dpms = ipu_crtc_dpms,
.mode_fixup = ipu_crtc_mode_fixup,
.mode_set = ipu_crtc_mode_set,
+ .mode_set_base = ipu_crtc_mode_set_base,
.prepare = ipu_crtc_prepare,
.commit = ipu_crtc_commit,
};
--
1.9.1
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/dri-devel
