From 9a6660308c44a4fb8f7d6bcec6e4fb4c9afa4750 Mon Sep 17 00:00:00 2001 From: Philipp Zabel Date: Wed, 8 Oct 2014 17:19:15 +0200 Subject: [PATCH] imx-drm: ipuv3-plane: fix plane updates for active planes While the DMA channel is running, it is not allowed to change anything but the inactive (double) buffer base address, so resizing a plane or changing to a frame buffer with different pixel format is not possible. Signed-off-by: Philipp Zabel Signed-off-by: Greg Kroah-Hartman --- drivers/staging/imx-drm/ipuv3-plane.c | 15 +++++++++++++++ drivers/staging/imx-drm/ipuv3-plane.h | 2 ++ 2 files changed, 17 insertions(+) diff --git a/drivers/staging/imx-drm/ipuv3-plane.c b/drivers/staging/imx-drm/ipuv3-plane.c index 16134d9c4054..6987e16fe99b 100644 --- a/drivers/staging/imx-drm/ipuv3-plane.c +++ b/drivers/staging/imx-drm/ipuv3-plane.c @@ -143,6 +143,18 @@ int ipu_plane_mode_set(struct ipu_plane *ipu_plane, struct drm_crtc *crtc, if (crtc_h < 2) return -EINVAL; + /* + * since we cannot touch active IDMAC channels, we do not support + * resizing the enabled plane or changing its format + */ + if (ipu_plane->enabled) { + if (src_w != ipu_plane->w || src_h != ipu_plane->h || + fb->pixel_format != ipu_plane->base.fb->pixel_format) + return -EINVAL; + + return ipu_plane_set_base(ipu_plane, fb, src_x, src_y); + } + switch (ipu_plane->dp_flow) { case IPU_DP_FLOW_SYNC_BG: ret = ipu_dp_setup_channel(ipu_plane->dp, @@ -202,6 +214,9 @@ int ipu_plane_mode_set(struct ipu_plane *ipu_plane, struct drm_crtc *crtc, if (ret < 0) return ret; + ipu_plane->w = src_w; + ipu_plane->h = src_h; + return 0; } diff --git a/drivers/staging/imx-drm/ipuv3-plane.h b/drivers/staging/imx-drm/ipuv3-plane.h index c0aae5bcb5d4..af125fb40ef5 100644 --- a/drivers/staging/imx-drm/ipuv3-plane.h +++ b/drivers/staging/imx-drm/ipuv3-plane.h @@ -26,6 +26,8 @@ struct ipu_plane { int x; int y; + int w; + int h; bool enabled; }; -- 2.20.1