void cx18_av_std_setup(struct cx18 *cx)
 {
        struct cx18_av_state *state = &cx->av_state;
+       struct v4l2_subdev *sd = &state->sd;
        v4l2_std_id std = state->std;
        int hblank, hactive, burst, vblank, vactive, sc;
        int vblank656, src_decimation;
        pll_int = cx18_av_read(cx, 0x108);
        pll_frac = cx18_av_read4(cx, 0x10c) & 0x1ffffff;
        pll_post = cx18_av_read(cx, 0x109);
-       CX18_DEBUG_INFO("PLL regs = int: %u, frac: %u, post: %u\n",
-                       pll_int, pll_frac, pll_post);
+       CX18_DEBUG_INFO_DEV(sd, "PLL regs = int: %u, frac: %u, post: %u\n",
+                           pll_int, pll_frac, pll_post);
 
        if (pll_post) {
                int fin, fsc, pll;
 
                pll = (28636360L * ((((u64)pll_int) << 25) + pll_frac)) >> 25;
                pll /= pll_post;
-               CX18_DEBUG_INFO("PLL = %d.%06d MHz\n",
-                                       pll / 1000000, pll % 1000000);
-               CX18_DEBUG_INFO("PLL/8 = %d.%06d MHz\n",
-                                       pll / 8000000, (pll / 8) % 1000000);
+               CX18_DEBUG_INFO_DEV(sd, "PLL = %d.%06d MHz\n",
+                                   pll / 1000000, pll % 1000000);
+               CX18_DEBUG_INFO_DEV(sd, "PLL/8 = %d.%06d MHz\n",
+                                   pll / 8000000, (pll / 8) % 1000000);
 
                fin = ((u64)src_decimation * pll) >> 12;
-               CX18_DEBUG_INFO("ADC Sampling freq = %d.%06d MHz\n",
-                                       fin / 1000000, fin % 1000000);
+               CX18_DEBUG_INFO_DEV(sd, "ADC Sampling freq = %d.%06d MHz\n",
+                                   fin / 1000000, fin % 1000000);
 
                fsc = (((u64)sc) * pll) >> 24L;
-               CX18_DEBUG_INFO("Chroma sub-carrier freq = %d.%06d MHz\n",
-                                       fsc / 1000000, fsc % 1000000);
-
-               CX18_DEBUG_INFO("hblank %i, hactive %i, "
-                       "vblank %i , vactive %i, vblank656 %i, src_dec %i,"
-                       "burst 0x%02x, luma_lpf %i, uv_lpf %i, comb 0x%02x,"
-                       " sc 0x%06x\n",
-                       hblank, hactive, vblank, vactive, vblank656,
-                       src_decimation, burst, luma_lpf, uv_lpf, comb, sc);
+               CX18_DEBUG_INFO_DEV(sd,
+                                   "Chroma sub-carrier freq = %d.%06d MHz\n",
+                                   fsc / 1000000, fsc % 1000000);
+
+               CX18_DEBUG_INFO_DEV(sd, "hblank %i, hactive %i, vblank %i, "
+                                   "vactive %i, vblank656 %i, src_dec %i, "
+                                   "burst 0x%02x, luma_lpf %i, uv_lpf %i, "
+                                   "comb 0x%02x, sc 0x%06x\n",
+                                   hblank, hactive, vblank, vactive, vblank656,
+                                   src_decimation, burst, luma_lpf, uv_lpf,
+                                   comb, sc);
        }
 
        /* Sets horizontal blanking delay and active lines */
                                        enum cx18_av_audio_input aud_input)
 {
        struct cx18_av_state *state = &cx->av_state;
+       struct v4l2_subdev *sd = &state->sd;
        u8 is_composite = (vid_input >= CX18_AV_COMPOSITE1 &&
                           vid_input <= CX18_AV_COMPOSITE8);
        u8 reg;
        u8 v;
 
-       CX18_DEBUG_INFO("decoder set video input %d, audio input %d\n",
-                       vid_input, aud_input);
+       CX18_DEBUG_INFO_DEV(sd, "decoder set video input %d, audio input %d\n",
+                           vid_input, aud_input);
 
        if (is_composite) {
                reg = 0xf0 + (vid_input - CX18_AV_COMPOSITE1);
                    luma > CX18_AV_SVIDEO_LUMA8 ||
                    chroma < CX18_AV_SVIDEO_CHROMA4 ||
                    chroma > CX18_AV_SVIDEO_CHROMA8) {
-                       CX18_ERR("0x%04x is not a valid video input!\n",
-                                       vid_input);
+                       CX18_ERR_DEV(sd, "0x%04x is not a valid video input!\n",
+                                    vid_input);
                        return -EINVAL;
                }
                reg = 0xf0 + ((luma - CX18_AV_SVIDEO_LUMA1) >> 4);
        case CX18_AV_AUDIO8: reg &= ~0xc0; reg |= 0x40; break;
 
        default:
-               CX18_ERR("0x%04x is not a valid audio input!\n", aud_input);
+               CX18_ERR_DEV(sd, "0x%04x is not a valid audio input!\n",
+                            aud_input);
                return -EINVAL;
        }
 
                        fmt = 0xc;
        }
 
-       CX18_DEBUG_INFO("changing video std to fmt %i\n", fmt);
+       CX18_DEBUG_INFO_DEV(sd, "changing video std to fmt %i\n", fmt);
 
        /* Follow step 9 of section 3.16 in the cx18_av datasheet.
           Without this PAL may display a vertical ghosting effect.
        switch (ctrl->id) {
        case V4L2_CID_BRIGHTNESS:
                if (ctrl->value < 0 || ctrl->value > 255) {
-                       CX18_ERR("invalid brightness setting %d\n",
-                                   ctrl->value);
+                       CX18_ERR_DEV(sd, "invalid brightness setting %d\n",
+                                    ctrl->value);
                        return -ERANGE;
                }
 
 
        case V4L2_CID_CONTRAST:
                if (ctrl->value < 0 || ctrl->value > 127) {
-                       CX18_ERR("invalid contrast setting %d\n",
-                                   ctrl->value);
+                       CX18_ERR_DEV(sd, "invalid contrast setting %d\n",
+                                    ctrl->value);
                        return -ERANGE;
                }
 
 
        case V4L2_CID_SATURATION:
                if (ctrl->value < 0 || ctrl->value > 127) {
-                       CX18_ERR("invalid saturation setting %d\n",
-                                   ctrl->value);
+                       CX18_ERR_DEV(sd, "invalid saturation setting %d\n",
+                                    ctrl->value);
                        return -ERANGE;
                }
 
 
        case V4L2_CID_HUE:
                if (ctrl->value < -128 || ctrl->value > 127) {
-                       CX18_ERR("invalid hue setting %d\n", ctrl->value);
+                       CX18_ERR_DEV(sd, "invalid hue setting %d\n",
+                                    ctrl->value);
                        return -ERANGE;
                }
 
 
                if ((pix->width * 16 < Hsrc) || (Hsrc < pix->width) ||
                    (Vlines * 8 < Vsrc) || (Vsrc < Vlines)) {
-                       CX18_ERR("%dx%d is not a valid size!\n",
-                                   pix->width, pix->height);
+                       CX18_ERR_DEV(sd, "%dx%d is not a valid size!\n",
+                                    pix->width, pix->height);
                        return -ERANGE;
                }
 
                else
                        filter = 3;
 
-               CX18_DEBUG_INFO("decoder set size %dx%d -> scale  %ux%u\n",
-                           pix->width, pix->height, HSC, VSC);
+               CX18_DEBUG_INFO_DEV(sd,
+                                   "decoder set size %dx%d -> scale  %ux%u\n",
+                                   pix->width, pix->height, HSC, VSC);
 
                /* HSCALE=HSC */
                cx18_av_write(cx, 0x418, HSC & 0xff);
 {
        struct cx18 *cx = v4l2_get_subdevdata(sd);
 
-       CX18_DEBUG_INFO("%s output\n", enable ? "enable" : "disable");
+       CX18_DEBUG_INFO_DEV(sd, "%s output\n", enable ? "enable" : "disable");
        if (enable) {
                cx18_av_write(cx, 0x115, 0x8c);
                cx18_av_write(cx, 0x116, 0x07);
        };
 
        struct cx18_av_state *state = &cx->av_state;
+       struct v4l2_subdev *sd = &state->sd;
        u8 vidfmt_sel = cx18_av_read(cx, 0x400) & 0xf;
        u8 gen_stat1 = cx18_av_read(cx, 0x40d);
        u8 gen_stat2 = cx18_av_read(cx, 0x40e);
        int vid_input = state->vid_input;
 
-       CX18_INFO("Video signal:              %spresent\n",
-                   (gen_stat2 & 0x20) ? "" : "not ");
-       CX18_INFO("Detected format:           %s\n",
-                   fmt_strs[gen_stat1 & 0xf]);
+       CX18_INFO_DEV(sd, "Video signal:              %spresent\n",
+                     (gen_stat2 & 0x20) ? "" : "not ");
+       CX18_INFO_DEV(sd, "Detected format:           %s\n",
+                     fmt_strs[gen_stat1 & 0xf]);
 
-       CX18_INFO("Specified standard:        %s\n",
-                   vidfmt_sel ? fmt_strs[vidfmt_sel] : "automatic detection");
+       CX18_INFO_DEV(sd, "Specified standard:        %s\n",
+                     vidfmt_sel ? fmt_strs[vidfmt_sel]
+                                : "automatic detection");
 
        if (vid_input >= CX18_AV_COMPOSITE1 &&
            vid_input <= CX18_AV_COMPOSITE8) {
-               CX18_INFO("Specified video input:     Composite %d\n",
-                       vid_input - CX18_AV_COMPOSITE1 + 1);
+               CX18_INFO_DEV(sd, "Specified video input:     Composite %d\n",
+                             vid_input - CX18_AV_COMPOSITE1 + 1);
        } else {
-               CX18_INFO("Specified video input:     S-Video (Luma In%d, Chroma In%d)\n",
-                       (vid_input & 0xf0) >> 4, (vid_input & 0xf00) >> 8);
+               CX18_INFO_DEV(sd, "Specified video input:     "
+                             "S-Video (Luma In%d, Chroma In%d)\n",
+                             (vid_input & 0xf0) >> 4,
+                             (vid_input & 0xf00) >> 8);
        }
 
-       CX18_INFO("Specified audioclock freq: %d Hz\n", state->audclk_freq);
+       CX18_INFO_DEV(sd, "Specified audioclock freq: %d Hz\n",
+                     state->audclk_freq);
 }
 
 static void log_audio_status(struct cx18 *cx)
 {
        struct cx18_av_state *state = &cx->av_state;
+       struct v4l2_subdev *sd = &state->sd;
        u8 download_ctl = cx18_av_read(cx, 0x803);
        u8 mod_det_stat0 = cx18_av_read(cx, 0x804);
        u8 mod_det_stat1 = cx18_av_read(cx, 0x805);
        case 0xfe: p = "forced mode"; break;
        default: p = "not defined"; break;
        }
-       CX18_INFO("Detected audio mode:       %s\n", p);
+       CX18_INFO_DEV(sd, "Detected audio mode:       %s\n", p);
 
        switch (mod_det_stat1) {
        case 0x00: p = "not defined"; break;
        case 0xff: p = "no detected audio standard"; break;
        default: p = "not defined"; break;
        }
-       CX18_INFO("Detected audio standard:   %s\n", p);
-       CX18_INFO("Audio muted:               %s\n",
-                   (mute_ctl & 0x2) ? "yes" : "no");
-       CX18_INFO("Audio microcontroller:     %s\n",
-                   (download_ctl & 0x10) ? "running" : "stopped");
+       CX18_INFO_DEV(sd, "Detected audio standard:   %s\n", p);
+       CX18_INFO_DEV(sd, "Audio muted:               %s\n",
+                     (mute_ctl & 0x2) ? "yes" : "no");
+       CX18_INFO_DEV(sd, "Audio microcontroller:     %s\n",
+                     (download_ctl & 0x10) ? "running" : "stopped");
 
        switch (audio_config >> 4) {
        case 0x00: p = "undefined"; break;
        case 0x0f: p = "automatic detection"; break;
        default: p = "undefined"; break;
        }
-       CX18_INFO("Configured audio standard: %s\n", p);
+       CX18_INFO_DEV(sd, "Configured audio standard: %s\n", p);
 
        if ((audio_config >> 4) < 0xF) {
                switch (audio_config & 0xF) {
                case 0x07: p = "DUAL3 (AB)"; break;
                default: p = "undefined";
                }
-               CX18_INFO("Configured audio mode:     %s\n", p);
+               CX18_INFO_DEV(sd, "Configured audio mode:     %s\n", p);
        } else {
                switch (audio_config & 0xF) {
                case 0x00: p = "BG"; break;
                case 0x0f: p = "automatic standard and mode detection"; break;
                default: p = "undefined"; break;
                }
-               CX18_INFO("Configured audio system:   %s\n", p);
+               CX18_INFO_DEV(sd, "Configured audio system:   %s\n", p);
        }
 
        if (aud_input)
-               CX18_INFO("Specified audio input:     Tuner (In%d)\n",
-                               aud_input);
+               CX18_INFO_DEV(sd, "Specified audio input:     Tuner (In%d)\n",
+                             aud_input);
        else
-               CX18_INFO("Specified audio input:     External\n");
+               CX18_INFO_DEV(sd, "Specified audio input:     External\n");
 
        switch (pref_mode & 0xf) {
        case 0: p = "mono/language A"; break;
        case 7: p = "language AB"; break;
        default: p = "undefined"; break;
        }
-       CX18_INFO("Preferred audio mode:      %s\n", p);
+       CX18_INFO_DEV(sd, "Preferred audio mode:      %s\n", p);
 
        if ((audio_config & 0xf) == 0xf) {
                switch ((afc0 >> 3) & 0x1) {
                case 0: p = "system DK"; break;
                case 1: p = "system L"; break;
                }
-               CX18_INFO("Selected 65 MHz format:    %s\n", p);
+               CX18_INFO_DEV(sd, "Selected 65 MHz format:    %s\n", p);
 
                switch (afc0 & 0x7) {
                case 0: p = "Chroma"; break;
                case 4: p = "autodetect"; break;
                default: p = "undefined"; break;
                }
-               CX18_INFO("Selected 45 MHz format:    %s\n", p);
+               CX18_INFO_DEV(sd, "Selected 45 MHz format:    %s\n", p);
        }
 }
 
        v4l2_subdev_init(sd, &cx18_av_ops);
        v4l2_set_subdevdata(sd, cx);
        snprintf(sd->name, sizeof(sd->name),
-                "%s internal A/V decoder", cx->v4l2_dev.name);
+                "%s %03x", cx->v4l2_dev.name, (state->rev >> 4));
        sd->grp_id = CX18_HW_418_AV;
        return v4l2_device_register_subdev(&cx->v4l2_dev, sd);
 }
-
-void cx18_av_exit(struct cx18 *cx, struct v4l2_subdev *sd)
-{
-       v4l2_device_unregister_subdev(&cx->av_state.sd);
-}
 
 #define CX18_WARN(fmt, args...)     v4l2_warn(&cx->v4l2_dev, fmt , ## args)
 #define CX18_INFO(fmt, args...)     v4l2_info(&cx->v4l2_dev, fmt , ## args)
 
+/* Messages for internal subdevs to use */
+#define CX18_DEBUG_DEV(x, dev, type, fmt, args...) \
+       do { \
+               if ((x) & cx18_debug) \
+                       v4l2_info(dev, " " type ": " fmt , ## args); \
+       } while (0)
+#define CX18_DEBUG_WARN_DEV(dev, fmt, args...) \
+               CX18_DEBUG_DEV(CX18_DBGFLG_WARN, dev, "warning", fmt , ## args)
+#define CX18_DEBUG_INFO_DEV(dev, fmt, args...) \
+               CX18_DEBUG_DEV(CX18_DBGFLG_INFO, dev, "info", fmt , ## args)
+#define CX18_DEBUG_API_DEV(dev, fmt, args...) \
+               CX18_DEBUG_DEV(CX18_DBGFLG_API, dev, "api", fmt , ## args)
+#define CX18_DEBUG_DMA_DEV(dev, fmt, args...) \
+               CX18_DEBUG_DEV(CX18_DBGFLG_DMA, dev, "dma", fmt , ## args)
+#define CX18_DEBUG_IOCTL_DEV(dev, fmt, args...) \
+               CX18_DEBUG_DEV(CX18_DBGFLG_IOCTL, dev, "ioctl", fmt , ## args)
+#define CX18_DEBUG_FILE_DEV(dev, fmt, args...) \
+               CX18_DEBUG_DEV(CX18_DBGFLG_FILE, dev, "file", fmt , ## args)
+#define CX18_DEBUG_I2C_DEV(dev, fmt, args...) \
+               CX18_DEBUG_DEV(CX18_DBGFLG_I2C, dev, "i2c", fmt , ## args)
+#define CX18_DEBUG_IRQ_DEV(dev, fmt, args...) \
+               CX18_DEBUG_DEV(CX18_DBGFLG_IRQ, dev, "irq", fmt , ## args)
+
+#define CX18_DEBUG_HIGH_VOL_DEV(x, dev, type, fmt, args...) \
+       do { \
+               if (((x) & cx18_debug) && (cx18_debug & CX18_DBGFLG_HIGHVOL)) \
+                       v4l2_info(dev, " " type ": " fmt , ## args); \
+       } while (0)
+#define CX18_DEBUG_HI_WARN_DEV(dev, fmt, args...) \
+       CX18_DEBUG_HIGH_VOL_DEV(CX18_DBGFLG_WARN, dev, "warning", fmt , ## args)
+#define CX18_DEBUG_HI_INFO_DEV(dev, fmt, args...) \
+       CX18_DEBUG_HIGH_VOL_DEV(CX18_DBGFLG_INFO, dev, "info", fmt , ## args)
+#define CX18_DEBUG_HI_API_DEV(dev, fmt, args...) \
+       CX18_DEBUG_HIGH_VOL_DEV(CX18_DBGFLG_API, dev, "api", fmt , ## args)
+#define CX18_DEBUG_HI_DMA_DEV(dev, fmt, args...) \
+       CX18_DEBUG_HIGH_VOL_DEV(CX18_DBGFLG_DMA, dev, "dma", fmt , ## args)
+#define CX18_DEBUG_HI_IOCTL_DEV(dev, fmt, args...) \
+       CX18_DEBUG_HIGH_VOL_DEV(CX18_DBGFLG_IOCTL, dev, "ioctl", fmt , ## args)
+#define CX18_DEBUG_HI_FILE_DEV(dev, fmt, args...) \
+       CX18_DEBUG_HIGH_VOL_DEV(CX18_DBGFLG_FILE, dev, "file", fmt , ## args)
+#define CX18_DEBUG_HI_I2C_DEV(dev, fmt, args...) \
+       CX18_DEBUG_HIGH_VOL_DEV(CX18_DBGFLG_I2C, dev, "i2c", fmt , ## args)
+#define CX18_DEBUG_HI_IRQ_DEV(dev, fmt, args...) \
+       CX18_DEBUG_HIGH_VOL_DEV(CX18_DBGFLG_IRQ, dev, "irq", fmt , ## args)
+
+#define CX18_ERR_DEV(dev, fmt, args...)      v4l2_err(dev, fmt , ## args)
+#define CX18_WARN_DEV(dev, fmt, args...)     v4l2_warn(dev, fmt , ## args)
+#define CX18_INFO_DEV(dev, fmt, args...)     v4l2_info(dev, fmt , ## args)
+
 /* Values for CX18_API_DEC_PLAYBACK_SPEED mpeg_frame_type_mask parameter: */
 #define MPEG_FRAME_TYPE_IFRAME 1
 #define MPEG_FRAME_TYPE_IFRAME_PFRAME 3