From 9fd099b1832cab8748ac85f451be8d79ab132d59 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Thu, 22 Feb 2018 12:12:36 -0500 Subject: [PATCH] media: v4l: vsp1: Don't start/stop media pipeline for DRM The DRM support code manages a pipeline of VSP entities, each backed by a media entity. When starting or stopping the pipeline, it starts and stops the media pipeline through the media API in order to store the pipeline pointer in every entity. The driver doesn't use the pipe pointer in media entities, neither does it rely on the other effects of the media_pipeline_start() and media_pipeline_stop() functions. Furthermore, as the media links for the DRM pipeline are never set up correctly, and as the pipeline can be modified dynamically when enabling or disabling planes, the current implementation is not correct. Remove the incorrect and unneeded code. While at it remove the outdated comment that states that entities are not started when the LIF is setup, as they now are. Signed-off-by: Laurent Pinchart Reviewed-by: Kieran Bingham Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/vsp1/vsp1_drm.c | 18 +----------------- 1 file changed, 1 insertion(+), 17 deletions(-) diff --git a/drivers/media/platform/vsp1/vsp1_drm.c b/drivers/media/platform/vsp1/vsp1_drm.c index b8fee1834253..a1f2ba044092 100644 --- a/drivers/media/platform/vsp1/vsp1_drm.c +++ b/drivers/media/platform/vsp1/vsp1_drm.c @@ -109,8 +109,6 @@ int vsp1_du_setup_lif(struct device *dev, unsigned int pipe_index, if (ret == -ETIMEDOUT) dev_err(vsp1->dev, "DRM pipeline stop timeout\n"); - media_pipeline_stop(&pipe->output->entity.subdev.entity); - for (i = 0; i < ARRAY_SIZE(pipe->inputs); ++i) { struct vsp1_rwpf *rpf = pipe->inputs[i]; @@ -223,13 +221,7 @@ int vsp1_du_setup_lif(struct device *dev, unsigned int pipe_index, return -EPIPE; } - /* - * Mark the pipeline as streaming and enable the VSP1. This will store - * the pipeline pointer in all entities, which the s_stream handlers - * will need. We don't start the entities themselves right at this point - * as there's no plane configured yet, so we can't start processing - * buffers. - */ + /* Enable the VSP1. */ ret = vsp1_device_get(vsp1); if (ret < 0) return ret; @@ -241,14 +233,6 @@ int vsp1_du_setup_lif(struct device *dev, unsigned int pipe_index, drm_pipe->du_complete = cfg->callback; drm_pipe->du_private = cfg->callback_data; - ret = media_pipeline_start(&pipe->output->entity.subdev.entity, - &pipe->pipe); - if (ret < 0) { - dev_dbg(vsp1->dev, "%s: pipeline start failed\n", __func__); - vsp1_device_put(vsp1); - return ret; - } - /* Disable the display interrupts. */ vsp1_write(vsp1, VI6_DISP_IRQ_STA, 0); vsp1_write(vsp1, VI6_DISP_IRQ_ENB, 0);