From: Leonard Crestez Date: Mon, 17 Sep 2018 13:42:13 +0000 (+0300) Subject: drm/mxsfb: Add pm_runtime calls to pipe_enable/disable X-Git-Tag: v4.20-rc1~81^2~20^2~7 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=4201f4e8484509499a40feb9fd6a6642f453f61e;p=thirdparty%2Fkernel%2Flinux.git drm/mxsfb: Add pm_runtime calls to pipe_enable/disable Adding lcdif nodes to a power domain currently results in black/corrupted screens or hangs because power is not correctly enabled when required. Ensure power is on when display is active by adding pm_runtime_get/put_sync to mxsfb_pipe_enable/disable. Signed-off-by: Leonard Crestez Reviewed-by: Stefan Agner Reviewed-by: Sean Paul Signed-off-by: Stefan Agner Link: https://patchwork.freedesktop.org/patch/msgid/ee88148399c63494cda4129b05444b0ac331b7a7.1537191359.git.leonard.crestez@nxp.com --- diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c b/drivers/gpu/drm/mxsfb/mxsfb_drv.c index ffe5137ccaf88..68d79f5dc0d32 100644 --- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c +++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c @@ -103,7 +103,9 @@ static void mxsfb_pipe_enable(struct drm_simple_display_pipe *pipe, struct drm_plane_state *plane_state) { struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe); + struct drm_device *drm = pipe->plane.dev; + pm_runtime_get_sync(drm->dev); drm_panel_prepare(mxsfb->panel); mxsfb_crtc_enable(mxsfb); drm_panel_enable(mxsfb->panel); @@ -112,10 +114,12 @@ static void mxsfb_pipe_enable(struct drm_simple_display_pipe *pipe, static void mxsfb_pipe_disable(struct drm_simple_display_pipe *pipe) { struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe); + struct drm_device *drm = pipe->plane.dev; drm_panel_disable(mxsfb->panel); mxsfb_crtc_disable(mxsfb); drm_panel_unprepare(mxsfb->panel); + pm_runtime_put_sync(drm->dev); } static void mxsfb_pipe_update(struct drm_simple_display_pipe *pipe,