media: v4l: ioctl: Set bus_info in v4l_querycap()

The bus_info field is set by most drivers based on the type of the device
bus as well as the name of the device. Do this in v4l_querycap() so
drivers don't need to. This keeps compatibility with non-default and silly
bus_info.

Signed-off-by: Sakari Ailus <[e-mail]>
Reviewed-by: Laurent Pinchart <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/common/saa7146/saa7146_video.c

···
 
 	strscpy((char *)cap->driver, "saa7146 v4l2", sizeof(cap->driver));
 	strscpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
-	sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci));
 	cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OVERLAY |
 			    V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
 			    V4L2_CAP_DEVICE_CAPS;

drivers/media/pci/bt8xx/bttv-driver.c

···
 
 	strscpy(cap->driver, "bttv", sizeof(cap->driver));
 	strscpy(cap->card, btv->video_dev.name, sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info),
-		 "PCI:%s", pci_name(btv->c.pci));
 	cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
 			    V4L2_CAP_STREAMING | V4L2_CAP_DEVICE_CAPS;
 	if (no_overlay <= 0)

drivers/media/pci/cx18/cx18-ioctl.c

···
 
 	strscpy(vcap->driver, CX18_DRIVER_NAME, sizeof(vcap->driver));
 	strscpy(vcap->card, cx->card_name, sizeof(vcap->card));
-	snprintf(vcap->bus_info, sizeof(vcap->bus_info),
-		 "PCI:%s", pci_name(cx->pci_dev));
 	vcap->capabilities = cx->v4l2_cap | V4L2_CAP_DEVICE_CAPS;
 	return 0;
 }

drivers/media/pci/cx88/cx88-blackbird.c

···
 	struct cx88_core *core = dev->core;
 
 	strscpy(cap->driver, "cx88_blackbird", sizeof(cap->driver));
-	sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 	return cx88_querycap(file, core, cap);
 }
 

drivers/media/pci/cx88/cx88-video.c

···
 	struct cx88_core *core = dev->core;
 
 	strscpy(cap->driver, "cx8800", sizeof(cap->driver));
-	sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 	return cx88_querycap(file, core, cap);
 }
 

drivers/media/pci/dt3155/dt3155.c

···
 static int dt3155_querycap(struct file *filp, void *p,
 			   struct v4l2_capability *cap)
 {
-	struct dt3155_priv *pd = video_drvdata(filp);
-
 	strscpy(cap->driver, DT3155_NAME, sizeof(cap->driver));
 	strscpy(cap->card, DT3155_NAME " frame grabber", sizeof(cap->card));
-	sprintf(cap->bus_info, "PCI:%s", pci_name(pd->pdev));
 	return 0;
 }
 

drivers/media/pci/intel/ipu3/ipu3-cio2-main.c

···
 static int cio2_v4l2_querycap(struct file *file, void *fh,
 			      struct v4l2_capability *cap)
 {
-	struct cio2_device *cio2 = video_drvdata(file);
-
 	strscpy(cap->driver, CIO2_NAME, sizeof(cap->driver));
 	strscpy(cap->card, CIO2_DEVICE_NAME, sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info),
-		 "PCI:%s", pci_name(cio2->pci_dev));
 
 	return 0;
 }

drivers/media/pci/ivtv/ivtv-ioctl.c

···
 
 	strscpy(vcap->driver, IVTV_DRIVER_NAME, sizeof(vcap->driver));
 	strscpy(vcap->card, itv->card_name, sizeof(vcap->card));
-	snprintf(vcap->bus_info, sizeof(vcap->bus_info), "PCI:%s", pci_name(itv->pdev));
 	vcap->capabilities = itv->v4l2_cap | V4L2_CAP_DEVICE_CAPS;
 	return 0;
 }

drivers/media/pci/meye/meye.c

···
 {
 	strscpy(cap->driver, "meye", sizeof(cap->driver));
 	strscpy(cap->card, "meye", sizeof(cap->card));
-	sprintf(cap->bus_info, "PCI:%s", pci_name(meye.mchip_dev));
 	return 0;
 }
 

drivers/media/pci/saa7134/saa7134-video.c

···
 	strscpy(cap->driver, "saa7134", sizeof(cap->driver));
 	strscpy(cap->card, saa7134_boards[dev->board].name,
 		sizeof(cap->card));
-	sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 	cap->capabilities = V4L2_CAP_READWRITE | V4L2_CAP_STREAMING |
 			    V4L2_CAP_RADIO | V4L2_CAP_VIDEO_CAPTURE |
 			    V4L2_CAP_VBI_CAPTURE | V4L2_CAP_DEVICE_CAPS;

drivers/media/pci/saa7164/saa7164-encoder.c

···
 	strscpy(cap->driver, dev->name, sizeof(cap->driver));
 	strscpy(cap->card, saa7164_boards[dev->board].name,
 		sizeof(cap->card));
-	sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 	cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
 			    V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE |
 			    V4L2_CAP_DEVICE_CAPS;

drivers/media/pci/saa7164/saa7164-vbi.c

···
 	strscpy(cap->driver, dev->name, sizeof(cap->driver));
 	strscpy(cap->card, saa7164_boards[dev->board].name,
 		sizeof(cap->card));
-	sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 	cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
 			    V4L2_CAP_TUNER | V4L2_CAP_VBI_CAPTURE |
 			    V4L2_CAP_DEVICE_CAPS;

drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c

···
 			     struct v4l2_capability *cap)
 {
 	struct solo_enc_dev *solo_enc = video_drvdata(file);
-	struct solo_dev *solo_dev = solo_enc->solo_dev;
 
 	strscpy(cap->driver, SOLO6X10_NAME, sizeof(cap->driver));
 	snprintf(cap->card, sizeof(cap->card), "Softlogic 6x10 Enc %d",
 		 solo_enc->ch);
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
-		 pci_name(solo_dev->pdev));
 	return 0;
 }
 

drivers/media/pci/solo6x10/solo6x10-v4l2.c

···
 static int solo_querycap(struct file *file, void  *priv,
 			 struct v4l2_capability *cap)
 {
-	struct solo_dev *solo_dev = video_drvdata(file);
-
 	strscpy(cap->driver, SOLO6X10_NAME, sizeof(cap->driver));
 	strscpy(cap->card, "Softlogic 6x10", sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
-		 pci_name(solo_dev->pdev));
 	return 0;
 }
 

drivers/media/pci/sta2x11/sta2x11_vip.c

···
 static int vidioc_querycap(struct file *file, void *priv,
 			   struct v4l2_capability *cap)
 {
-	struct sta2x11_vip *vip = video_drvdata(file);
-
 	strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 	strscpy(cap->card, KBUILD_MODNAME, sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
-		 pci_name(vip->pdev));
 	return 0;
 }
 

drivers/media/pci/tw5864/tw5864-video.c

···
 	strscpy(cap->driver, "tw5864", sizeof(cap->driver));
 	snprintf(cap->card, sizeof(cap->card), "TW5864 Encoder %d",
 		 input->nr);
-	sprintf(cap->bus_info, "PCI:%s", pci_name(input->root->pci));
 	return 0;
 }
 

drivers/media/pci/tw68/tw68-video.c

···
 static int tw68_querycap(struct file *file, void  *priv,
 					struct v4l2_capability *cap)
 {
-	struct tw68_dev *dev = video_drvdata(file);
-
 	strscpy(cap->driver, "tw68", sizeof(cap->driver));
 	strscpy(cap->card, "Techwell Capture Card",
 		sizeof(cap->card));
-	sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
 	return 0;
 }
 

drivers/media/pci/tw686x/tw686x-video.c

···
 
 	strscpy(cap->driver, "tw686x", sizeof(cap->driver));
 	strscpy(cap->card, dev->name, sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info),
-		 "PCI:%s", pci_name(dev->pci_dev));
 	return 0;
 }
 

drivers/media/platform/allegro-dvt/allegro-core.c

···
 static int allegro_querycap(struct file *file, void *fh,
 			    struct v4l2_capability *cap)
 {
-	struct video_device *vdev = video_devdata(file);
-	struct allegro_dev *dev = video_get_drvdata(vdev);
-
 	strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 	strscpy(cap->card, "Allegro DVT Video Encoder", sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-		 dev_name(&dev->plat_dev->dev));
 
 	return 0;
 }

drivers/media/platform/marvell/cafe-driver.c

···
 	mcam->plat_power_up = cafe_ctlr_power_up;
 	mcam->plat_power_down = cafe_ctlr_power_down;
 	mcam->dev = &pdev->dev;
-	snprintf(mcam->bus_info, sizeof(mcam->bus_info), "PCI:%s", pci_name(pdev));
 	/*
 	 * Vmalloc mode for buffers is traditional with this driver.
 	 * We *might* be able to run DMA_contig, especially on a system

drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c

···
 
 	strscpy(cap->driver, jpeg->variant->dev_name, sizeof(cap->driver));
 	strscpy(cap->card, jpeg->variant->dev_name, sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-		 dev_name(jpeg->dev));
 
 	return 0;
 }

drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c

···
 static int mxc_jpeg_querycap(struct file *file, void *priv,
 			     struct v4l2_capability *cap)
 {
-	struct mxc_jpeg_dev *mxc_jpeg = video_drvdata(file);
-
 	strscpy(cap->driver, MXC_JPEG_NAME " codec", sizeof(cap->driver));
 	strscpy(cap->card, MXC_JPEG_NAME " codec", sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-		 dev_name(mxc_jpeg->dev));
 	cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE;
 	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
 

drivers/media/platform/qcom/camss/camss-video.c

···
 static int video_querycap(struct file *file, void *fh,
 			  struct v4l2_capability *cap)
 {
-	struct camss_video *video = video_drvdata(file);
-
 	strscpy(cap->driver, "qcom-camss", sizeof(cap->driver));
 	strscpy(cap->card, "Qualcomm Camera Subsystem", sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-		 dev_name(video->camss->dev));
 
 	return 0;
 }

drivers/media/platform/renesas/rcar-vin/rcar-v4l2.c

···
 static int rvin_querycap(struct file *file, void *priv,
 			 struct v4l2_capability *cap)
 {
-	struct rvin_dev *vin = video_drvdata(file);
-
 	strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 	strscpy(cap->card, "R_Car_VIN", sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-		 dev_name(vin->dev));
 	return 0;
 }
 

drivers/media/platform/renesas/rcar_jpu.c

···
 		strscpy(cap->card, DRV_NAME " decoder", sizeof(cap->card));
 
 	strscpy(cap->driver, DRV_NAME, sizeof(cap->driver));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-		 dev_name(ctx->jpu->dev));
 	memset(cap->reserved, 0, sizeof(cap->reserved));
 
 	return 0;

drivers/media/platform/renesas/vsp1/vsp1_histo.c

···
 
 	strscpy(cap->driver, "vsp1", sizeof(cap->driver));
 	strscpy(cap->card, histo->video.name, sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-		 dev_name(histo->entity.vsp1->dev));
 
 	return 0;
 }

drivers/media/platform/renesas/vsp1/vsp1_video.c

···
 
 	strscpy(cap->driver, "vsp1", sizeof(cap->driver));
 	strscpy(cap->card, video->video.name, sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-		 dev_name(video->vsp1->dev));
 
 	return 0;
 }

drivers/media/platform/samsung/exynos-gsc/gsc-m2m.c

···
 static int gsc_m2m_querycap(struct file *file, void *fh,
 			   struct v4l2_capability *cap)
 {
-	struct gsc_ctx *ctx = fh_to_ctx(fh);
-	struct gsc_dev *gsc = ctx->gsc_dev;
-
 	strscpy(cap->driver, GSC_MODULE_NAME, sizeof(cap->driver));
 	strscpy(cap->card, GSC_MODULE_NAME " gscaler", sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-		 dev_name(&gsc->pdev->dev));
 	return 0;
 }
 

drivers/media/platform/samsung/exynos4-is/common.c

···
 {
 	strscpy(cap->driver, dev->driver->name, sizeof(cap->driver));
 	strscpy(cap->card, dev->driver->name, sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info),
-				"platform:%s", dev_name(dev));
 }
 EXPORT_SYMBOL(__fimc_vidioc_querycap);
 

drivers/media/platform/samsung/exynos4-is/fimc-lite.c

···
 static int fimc_lite_querycap(struct file *file, void *priv,
 					struct v4l2_capability *cap)
 {
-	struct fimc_lite *fimc = video_drvdata(file);
-
 	strscpy(cap->driver, FIMC_LITE_DRV_NAME, sizeof(cap->driver));
 	strscpy(cap->card, FIMC_LITE_DRV_NAME, sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-					dev_name(&fimc->pdev->dev));
 	return 0;
 }
 

drivers/media/platform/samsung/s5p-jpeg/jpeg-core.c

···
 		strscpy(cap->card, S5P_JPEG_M2M_NAME " decoder",
 			sizeof(cap->card));
 	}
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-		 dev_name(ctx->jpeg->dev));
 	return 0;
 }
 

drivers/media/platform/samsung/s5p-mfc/s5p_mfc_dec.c

···
 
 	strscpy(cap->driver, S5P_MFC_NAME, sizeof(cap->driver));
 	strscpy(cap->card, dev->vfd_dec->name, sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-		 dev_name(&dev->plat_dev->dev));
 	return 0;
 }
 

drivers/media/platform/samsung/s5p-mfc/s5p_mfc_enc.c

···
 
 	strscpy(cap->driver, S5P_MFC_NAME, sizeof(cap->driver));
 	strscpy(cap->card, dev->vfd_enc->name, sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-		 dev_name(&dev->plat_dev->dev));
 	return 0;
 }
 

drivers/media/platform/sunxi/sun4i-csi/sun4i_v4l2.c

···
 static int sun4i_csi_querycap(struct file *file, void *priv,
 			      struct v4l2_capability *cap)
 {
-	struct sun4i_csi *csi = video_drvdata(file);
-
 	strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
 	strscpy(cap->card, "sun4i-csi", sizeof(cap->card));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-		 dev_name(csi->dev));
 
 	return 0;
 }

drivers/media/platform/ti/cal/cal-video.c

···
 static int cal_querycap(struct file *file, void *priv,
 			struct v4l2_capability *cap)
 {
-	struct cal_ctx *ctx = video_drvdata(file);
-
 	strscpy(cap->driver, CAL_MODULE_NAME, sizeof(cap->driver));
 	strscpy(cap->card, CAL_MODULE_NAME, sizeof(cap->card));
 
-	snprintf(cap->bus_info, sizeof(cap->bus_info),
-		 "platform:%s", dev_name(ctx->cal->dev));
 	return 0;
 }
 

drivers/media/platform/ti/davinci/vpbe_display.c

···
 
 	snprintf(cap->driver, sizeof(cap->driver), "%s",
 		dev_name(vpbe_dev->pdev));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-		 dev_name(vpbe_dev->pdev));
 	strscpy(cap->card, vpbe_dev->cfg->module_name, sizeof(cap->card));
 
 	return 0;

drivers/media/platform/ti/davinci/vpif_capture.c

···
 	struct vpif_capture_config *config = vpif_dev->platform_data;
 
 	strscpy(cap->driver, VPIF_DRIVER_NAME, sizeof(cap->driver));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-		 dev_name(vpif_dev));
 	strscpy(cap->card, config->card_name, sizeof(cap->card));
 
 	return 0;

drivers/media/platform/ti/davinci/vpif_display.c

···
 	struct vpif_display_config *config = vpif_dev->platform_data;
 
 	strscpy(cap->driver, VPIF_DRIVER_NAME, sizeof(cap->driver));
-	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
-		 dev_name(vpif_dev));
 	strscpy(cap->card, config->card_name, sizeof(cap->card));
 
 	return 0;

drivers/media/radio/radio-maxiradio.c

···
 	dev->tea.v4l2_dev = v4l2_dev;
 	dev->tea.radio_nr = radio_nr;
 	strscpy(dev->tea.card, "Maxi Radio FM2000", sizeof(dev->tea.card));
-	snprintf(dev->tea.bus_info, sizeof(dev->tea.bus_info),
-			"PCI:%s", pci_name(pdev));
 
 	retval = -ENODEV;
 

drivers/media/v4l2-core/v4l2-ioctl.c

···
 
 #include <linux/videodev2.h>
 
+#include <media/media-device.h> /* for media_set_bus_info() */
 #include <media/v4l2-common.h>
 #include <media/v4l2-ioctl.h>
 #include <media/v4l2-ctrls.h>
···
 	cap->version = LINUX_VERSION_CODE;
 	cap->device_caps = vfd->device_caps;
 	cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
+
+	media_set_bus_info(cap->bus_info, sizeof(cap->bus_info),
+			   vfd->dev_parent);
 
 	ret = ops->vidioc_querycap(file, fh, cap);