From 4ee895e71abb51de61f8ea4b7cdba68e474ccf16 Mon Sep 17 00:00:00 2001 From: Johan Korsnes Date: Tue, 18 Jun 2019 03:37:24 -0400 Subject: [PATCH] media: vivid: reorder CEC allocation and control set-up CEC adapters and controllers (handlers) are now set up as follows: 1. Allocate CEC adapters: setup of control handlers in next step requires these adapters to be allocated. 2. Setup of control handlers: This must be done prior to registering and exposing the adapters to user space to avoid a race condition. 3. Register CEC adapters: make them available to user space. Signed-off-by: Johan Korsnes Signed-off-by: Hans Verkuil [hverkuil-cisco@xs4all.nl: PTR_ERR -> PTR_ERR_OR_ZERO] Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/vivid/vivid-core.c | 100 +++++++++++++--------- 1 file changed, 58 insertions(+), 42 deletions(-) diff --git a/drivers/media/platform/vivid/vivid-core.c b/drivers/media/platform/vivid/vivid-core.c index 8c211fba3c66..bc2a176937a4 100644 --- a/drivers/media/platform/vivid/vivid-core.c +++ b/drivers/media/platform/vivid/vivid-core.c @@ -667,6 +667,9 @@ static int vivid_create_instance(struct platform_device *pdev, int inst) v4l2_std_id tvnorms_cap = 0, tvnorms_out = 0; int ret; int i; +#ifdef CONFIG_VIDEO_VIVID_CEC + unsigned int cec_tx_bus_cnt = 0; +#endif /* allocate main vivid state structure */ dev = kzalloc(sizeof(*dev), GFP_KERNEL); @@ -1058,14 +1061,6 @@ static int vivid_create_instance(struct platform_device *pdev, int inst) vivid_update_format_cap(dev, false); vivid_update_format_out(dev); - v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vid_cap); - v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vid_out); - v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vbi_cap); - v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vbi_out); - v4l2_ctrl_handler_setup(&dev->ctrl_hdl_radio_rx); - v4l2_ctrl_handler_setup(&dev->ctrl_hdl_radio_tx); - v4l2_ctrl_handler_setup(&dev->ctrl_hdl_sdr_cap); - /* initialize overlay */ dev->fb_cap.fmt.width = dev->src_rect.width; dev->fb_cap.fmt.height = dev->src_rect.height; @@ -1226,6 +1221,47 @@ static int vivid_create_instance(struct platform_device *pdev, int inst) dev->fb_info.node); } +#ifdef CONFIG_VIDEO_VIVID_CEC + if (dev->has_vid_cap && in_type_counter[HDMI]) { + struct cec_adapter *adap; + + adap = vivid_cec_alloc_adap(dev, 0, false); + ret = PTR_ERR_OR_ZERO(adap); + if (ret < 0) + goto unreg_dev; + dev->cec_rx_adap = adap; + } + + if (dev->has_vid_out) { + for (i = 0; i < dev->num_outputs; i++) { + struct cec_adapter *adap; + + if (dev->output_type[i] != HDMI) + continue; + + dev->cec_output2bus_map[i] = cec_tx_bus_cnt; + adap = vivid_cec_alloc_adap(dev, cec_tx_bus_cnt, true); + ret = PTR_ERR_OR_ZERO(adap); + if (ret < 0) { + for (i = 0; i < dev->num_outputs; i++) + cec_delete_adapter(dev->cec_tx_adap[i]); + goto unreg_dev; + } + + dev->cec_tx_adap[cec_tx_bus_cnt] = adap; + cec_tx_bus_cnt++; + } + } +#endif + + v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vid_cap); + v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vid_out); + v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vbi_cap); + v4l2_ctrl_handler_setup(&dev->ctrl_hdl_vbi_out); + v4l2_ctrl_handler_setup(&dev->ctrl_hdl_radio_rx); + v4l2_ctrl_handler_setup(&dev->ctrl_hdl_radio_tx); + v4l2_ctrl_handler_setup(&dev->ctrl_hdl_sdr_cap); + /* finally start creating the device nodes */ if (dev->has_vid_cap) { vfd = &dev->vid_cap_dev; @@ -1255,22 +1291,15 @@ static int vivid_create_instance(struct platform_device *pdev, int inst) #ifdef CONFIG_VIDEO_VIVID_CEC if (in_type_counter[HDMI]) { - struct cec_adapter *adap; - - adap = vivid_cec_alloc_adap(dev, 0, false); - ret = PTR_ERR_OR_ZERO(adap); - if (ret < 0) - goto unreg_dev; - dev->cec_rx_adap = adap; - ret = cec_register_adapter(adap, &pdev->dev); + ret = cec_register_adapter(dev->cec_rx_adap, &pdev->dev); if (ret < 0) { - cec_delete_adapter(adap); + cec_delete_adapter(dev->cec_rx_adap); dev->cec_rx_adap = NULL; goto unreg_dev; } - cec_s_phys_addr(adap, 0, false); + cec_s_phys_addr(dev->cec_rx_adap, 0, false); v4l2_info(&dev->v4l2_dev, "CEC adapter %s registered for HDMI input 0\n", - dev_name(&adap->devnode.dev)); + dev_name(&dev->cec_rx_adap->devnode.dev)); } #endif @@ -1282,10 +1311,6 @@ static int vivid_create_instance(struct platform_device *pdev, int inst) } if (dev->has_vid_out) { -#ifdef CONFIG_VIDEO_VIVID_CEC - unsigned int bus_cnt = 0; -#endif - vfd = &dev->vid_out_dev; snprintf(vfd->name, sizeof(vfd->name), "vivid-%03d-vid-out", inst); @@ -1313,30 +1338,21 @@ static int vivid_create_instance(struct platform_device *pdev, int inst) #endif #ifdef CONFIG_VIDEO_VIVID_CEC - for (i = 0; i < dev->num_outputs; i++) { - struct cec_adapter *adap; - - if (dev->output_type[i] != HDMI) - continue; - dev->cec_output2bus_map[i] = bus_cnt; - adap = vivid_cec_alloc_adap(dev, bus_cnt, true); - ret = PTR_ERR_OR_ZERO(adap); - if (ret < 0) - goto unreg_dev; - dev->cec_tx_adap[bus_cnt] = adap; - ret = cec_register_adapter(adap, &pdev->dev); + for (i = 0; i < cec_tx_bus_cnt; i++) { + ret = cec_register_adapter(dev->cec_tx_adap[i], &pdev->dev); if (ret < 0) { - cec_delete_adapter(adap); - dev->cec_tx_adap[bus_cnt] = NULL; + for (; i < cec_tx_bus_cnt; i++) { + cec_delete_adapter(dev->cec_tx_adap[i]); + dev->cec_tx_adap[i] = NULL; + } goto unreg_dev; } v4l2_info(&dev->v4l2_dev, "CEC adapter %s registered for HDMI output %d\n", - dev_name(&adap->devnode.dev), bus_cnt); - bus_cnt++; - if (bus_cnt <= out_type_counter[HDMI]) - cec_s_phys_addr(adap, bus_cnt << 12, false); + dev_name(&dev->cec_tx_adap[i]->devnode.dev), i); + if (i <= out_type_counter[HDMI]) + cec_s_phys_addr(dev->cec_tx_adap[i], i << 12, false); else - cec_s_phys_addr(adap, 0x1000, false); + cec_s_phys_addr(dev->cec_tx_adap[i], 0x1000, false); } #endif -- 2.30.2