Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media updates from Mauro Carvalho Chehab:
 "The first part of the media updates for Kernel 3.7.

  This series contain:

   - A major tree renaming patch series: now, drivers are organized
     internally by their used bus, instead of by V4L2 and/or DVB API,
     providing a cleaner driver location for hybrid drivers that
     implement both APIs, and allowing to cleanup the Kconfig items and
     make them more intuitive for the end user;

   - Media Kernel developers are typically very lazy with their duties
     of keeping the MAINTAINERS entries for their drivers updated.  As
     now the tree is more organized, we're doing an effort to add/update
     those entries for the drivers that aren't currently orphan;

   - Several DVB USB drivers got moved to a new DVB USB v2 core; the new
     core fixes several bugs (as the existing one that got bitroted).
     Now, suspend/resume finally started to work fine (at least with
     some devices - we should expect more work with regards to it);

   - added multistream support for DVB-T2, and unified the API for
     DVB-S2 and ISDB-S.  Backward binary support is preserved;

   - as usual, a few new drivers, some V4L2 core improvements and lots
     of drivers improvements and fixes.

  There are some points to notice on this series:

   1) you should expect a trivial merge conflict on your tree, with the
      removal of Documentation/feature-removal-schedule.txt: this series
      would be adding two additional entries there.  I opted to not
      rebase it due to this recent change;

   2) With regards to the PCTV 520e udev-related breakage, I opted to
      fix it in a way that the patches can be backported to 3.5 even
      without your firmware fix patch.  This way, Greg doesn't need to
      rush backporting your patch (as there are still the firmware cache
      and firmware path customization issues to be addressed there).

      I'll send later a patch (likely after the end of the merge window)
      reverting the rest of the DRX-K async firmware request, fully
      restoring its original behaviour to allow media drivers to
      initialize everything serialized as before for 3.7 and upper.

   3) I'm planning to work on this weekend to test the DMABUF patches
      for V4L2.  The patches are on my queue for several Kernel cycles,
      but, up to now, there is/was no way to test the series locally.

      I have some concerns about this particular changeset with regards
      to security issues, and with regards to the replacement of the old
      VIDIOC_OVERLAY ioctl's that is broken on modern systems, due to
      GPU drivers change.  The Overlay API allows direct PCI2PCI
      transfers from a media capture card into the GPU framebuffer, but
      its API is crappy.  Also, the only existing X11 driver that
      implements it requires a XV extension that is not available
      anymore on modern drivers.  The DMABUF can do the same thing, but
      with it is promising to be a properly-designed API.  If I can
      successfully test this series and be happy with it, I should be
      asking you to pull them next week."

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (717 commits)
  em28xx: regression fix: use DRX-K sync firmware requests on em28xx
  drxk: allow loading firmware synchrousnously
  em28xx: Make all em28xx extensions to be initialized asynchronously
  [media] tda18271: properly report read errors in tda18271_get_id
  [media] tda18271: delay IR & RF calibration until init() if delay_cal is set
  [media] MAINTAINERS: add Michael Krufky as tda827x maintainer
  [media] MAINTAINERS: add Michael Krufky as tda8290 maintainer
  [media] MAINTAINERS: add Michael Krufky as cxusb maintainer
  [media] MAINTAINERS: add Michael Krufky as lg2160 maintainer
  [media] MAINTAINERS: add Michael Krufky as lgdt3305 maintainer
  [media] MAINTAINERS: add Michael Krufky as mxl111sf maintainer
  [media] MAINTAINERS: add Michael Krufky as mxl5007t maintainer
  [media] MAINTAINERS: add Michael Krufky as tda18271 maintainer
  [media] s5p-tv: Report only multi-plane capabilities in vidioc_querycap
  [media] s5p-mfc: Fix misplaced return statement in s5p_mfc_suspend()
  [media] exynos-gsc: Add missing static storage class specifiers
  [media] exynos-gsc: Remove <linux/version.h> header file inclusion
  [media] s5p-fimc: Fix incorrect condition in fimc_lite_reqbufs()
  [media] s5p-tv: Fix potential NULL pointer dereference error
  [media] s5k6aa: Fix possible NULL pointer dereference
  ...

1 files changed, 216 insertions, 0 deletions

diff --git a/drivers/media/i2c/m52790.c b/drivers/media/i2c/m52790.c
new file mode 100644
index 000000000000..0991576f4c82
--- /dev/null
+++ b/drivers/media/i2c/m52790.c
@@ -0,0 +1,216 @@
+/*
+ * m52790 i2c ivtv driver.
+ * Copyright (C) 2007  Hans Verkuil
+ *
+ * A/V source switching Mitsubishi M52790SP/FP
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/ioctl.h>
+#include <asm/uaccess.h>
+#include <linux/i2c.h>
+#include <linux/videodev2.h>
+#include <media/m52790.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-chip-ident.h>
+
+MODULE_DESCRIPTION("i2c device driver for m52790 A/V switch");
+MODULE_AUTHOR("Hans Verkuil");
+MODULE_LICENSE("GPL");
+
+
+struct m52790_state {
+	struct v4l2_subdev sd;
+	u16 input;
+	u16 output;
+};
+
+static inline struct m52790_state *to_state(struct v4l2_subdev *sd)
+{
+	return container_of(sd, struct m52790_state, sd);
+}
+
+/* ----------------------------------------------------------------------- */
+
+static int m52790_write(struct v4l2_subdev *sd)
+{
+	struct m52790_state *state = to_state(sd);
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+	u8 sw1 = (state->input | state->output) & 0xff;
+	u8 sw2 = (state->input | state->output) >> 8;
+
+	return i2c_smbus_write_byte_data(client, sw1, sw2);
+}
+
+/* Note: audio and video are linked and cannot be switched separately.
+   So audio and video routing commands are identical for this chip.
+   In theory the video amplifier and audio modes could be handled
+   separately for the output, but that seems to be overkill right now.
+   The same holds for implementing an audio mute control, this is now
+   part of the audio output routing. The normal case is that another
+   chip takes care of the actual muting so making it part of the
+   output routing seems to be the right thing to do for now. */
+static int m52790_s_routing(struct v4l2_subdev *sd,
+			    u32 input, u32 output, u32 config)
+{
+	struct m52790_state *state = to_state(sd);
+
+	state->input = input;
+	state->output = output;
+	m52790_write(sd);
+	return 0;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int m52790_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
+{
+	struct m52790_state *state = to_state(sd);
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+	if (!v4l2_chip_match_i2c_client(client, &reg->match))
+		return -EINVAL;
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+	if (reg->reg != 0)
+		return -EINVAL;
+	reg->size = 1;
+	reg->val = state->input | state->output;
+	return 0;
+}
+
+static int m52790_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg)
+{
+	struct m52790_state *state = to_state(sd);
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+	if (!v4l2_chip_match_i2c_client(client, &reg->match))
+		return -EINVAL;
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+	if (reg->reg != 0)
+		return -EINVAL;
+	state->input = reg->val & 0x0303;
+	state->output = reg->val & ~0x0303;
+	m52790_write(sd);
+	return 0;
+}
+#endif
+
+static int m52790_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_M52790, 0);
+}
+
+static int m52790_log_status(struct v4l2_subdev *sd)
+{
+	struct m52790_state *state = to_state(sd);
+
+	v4l2_info(sd, "Switch 1: %02x\n",
+			(state->input | state->output) & 0xff);
+	v4l2_info(sd, "Switch 2: %02x\n",
+			(state->input | state->output) >> 8);
+	return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct v4l2_subdev_core_ops m52790_core_ops = {
+	.log_status = m52790_log_status,
+	.g_chip_ident = m52790_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+	.g_register = m52790_g_register,
+	.s_register = m52790_s_register,
+#endif
+};
+
+static const struct v4l2_subdev_audio_ops m52790_audio_ops = {
+	.s_routing = m52790_s_routing,
+};
+
+static const struct v4l2_subdev_video_ops m52790_video_ops = {
+	.s_routing = m52790_s_routing,
+};
+
+static const struct v4l2_subdev_ops m52790_ops = {
+	.core = &m52790_core_ops,
+	.audio = &m52790_audio_ops,
+	.video = &m52790_video_ops,
+};
+
+/* ----------------------------------------------------------------------- */
+
+/* i2c implementation */
+
+static int m52790_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
+{
+	struct m52790_state *state;
+	struct v4l2_subdev *sd;
+
+	/* Check if the adapter supports the needed features */
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+		return -EIO;
+
+	v4l_info(client, "chip found @ 0x%x (%s)\n",
+			client->addr << 1, client->adapter->name);
+
+	state = kzalloc(sizeof(struct m52790_state), GFP_KERNEL);
+	if (state == NULL)
+		return -ENOMEM;
+
+	sd = &state->sd;
+	v4l2_i2c_subdev_init(sd, client, &m52790_ops);
+	state->input = M52790_IN_TUNER;
+	state->output = M52790_OUT_STEREO;
+	m52790_write(sd);
+	return 0;
+}
+
+static int m52790_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+
+	v4l2_device_unregister_subdev(sd);
+	kfree(to_state(sd));
+	return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct i2c_device_id m52790_id[] = {
+	{ "m52790", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, m52790_id);
+
+static struct i2c_driver m52790_driver = {
+	.driver = {
+		.owner	= THIS_MODULE,
+		.name	= "m52790",
+	},
+	.probe		= m52790_probe,
+	.remove		= m52790_remove,
+	.id_table	= m52790_id,
+};
+
+module_i2c_driver(m52790_driver);