treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157

Based on 3 normalized pattern(s):

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

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 [author] [kishon] [vijay] [abraham]
[i] [kishon]@[ti] [com] 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

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 [author] [graeme] [gregory]
[gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i]
[kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema]
[hk] [hemahk]@[ti] [com] 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

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1105 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

media: cx23885: Ryzen DMA related RiSC engine stall fixes

This bug affects all of Hauppauge QuadHD boards when used on all Ryzen
platforms and some XEON platforms. On these platforms it is possible to
error out the RiSC engine and cause it to stall, whereafter the only
way to reset the board to a working state is to reboot.

This is the fatal condition with current driver:

[ 255.663598] cx23885: cx23885[0]: mpeg risc op code error
[ 255.663607] cx23885: cx23885[0]: TS1 B - dma channel status dump
[ 255.663612] cx23885: cx23885[0]: cmds: init risc lo : 0xffe54000
[ 255.663615] cx23885: cx23885[0]: cmds: init risc hi : 0x00000000
[ 255.663619] cx23885: cx23885[0]: cmds: cdt base : 0x00010870
[ 255.663622] cx23885: cx23885[0]: cmds: cdt size : 0x0000000a
[ 255.663625] cx23885: cx23885[0]: cmds: iq base : 0x00010630
[ 255.663629] cx23885: cx23885[0]: cmds: iq size : 0x00000010
[ 255.663632] cx23885: cx23885[0]: cmds: risc pc lo : 0xffe54018
[ 255.663636] cx23885: cx23885[0]: cmds: risc pc hi : 0x00000000
[ 255.663639] cx23885: cx23885[0]: cmds: iq wr ptr : 0x00004192
[ 255.663642] cx23885: cx23885[0]: cmds: iq rd ptr : 0x0000418c
[ 255.663645] cx23885: cx23885[0]: cmds: cdt current : 0x00010898
[ 255.663649] cx23885: cx23885[0]: cmds: pci target lo : 0xf85ca340
[ 255.663652] cx23885: cx23885[0]: cmds: pci target hi : 0x00000000
[ 255.663655] cx23885: cx23885[0]: cmds: line / byte : 0x000c0000
[ 255.663659] cx23885: cx23885[0]: risc0:
[ 255.663661] 0x1c0002f0 [ write sol eol count=752 ]
[ 255.663666] cx23885: cx23885[0]: risc1:
[ 255.663667] 0xf85ca050 [ INVALID sol 22 20 19 18 resync 13 count=80 ]
[ 255.663674] cx23885: cx23885[0]: risc2:
[ 255.663674] 0x00000000 [ INVALID count=0 ]
[ 255.663678] cx23885: cx23885[0]: risc3:
[ 255.663679] 0x1c0002f0 [ write sol eol count=752 ]
[ 255.663684] cx23885: cx23885[0]: (0x00010630) iq 0:
[ 255.663685] 0x1c0002f0 [ write sol eol count=752 ]
[ 255.663690] cx23885: cx23885[0]: iq 1: 0xf85ca630 [ arg #1 ]
[ 255.663693] cx23885: cx23885[0]: iq 2: 0x00000000 [ arg #2 ]
[ 255.663696] cx23885: cx23885[0]: (0x0001063c) iq 3:
[ 255.663697] 0x1c0002f0 [ write sol eol count=752 ]
[ 255.663702] cx23885: cx23885[0]: iq 4: 0xf85ca920 [ arg #1 ]
[ 255.663705] cx23885: cx23885[0]: iq 5: 0x00000000 [ arg #2 ]
[ 255.663709] cx23885: cx23885[0]: (0x00010648) iq 6:
[ 255.663709] 0xf85ca340 [ INVALID sol 22 20 19 18 resync 13 count=832 ]
[ 255.663716] cx23885: cx23885[0]: (0x0001064c) iq 7:
[ 255.663717] 0x00000000 [ INVALID count=0 ]
[ 255.663721] cx23885: cx23885[0]: (0x00010650) iq 8:
[ 255.663721] 0x00000000 [ INVALID count=0 ]
[ 255.663725] cx23885: cx23885[0]: (0x00010654) iq 9:
[ 255.663726] 0x1c0002f0 [ write sol eol count=752 ]
[ 255.663731] cx23885: cx23885[0]: iq a: 0xf85c9780 [ arg #1 ]
[ 255.663734] cx23885: cx23885[0]: iq b: 0x00000000 [ arg #2 ]
[ 255.663737] cx23885: cx23885[0]: (0x00010660) iq c:
[ 255.663738] 0x1c0002f0 [ write sol eol count=752 ]
[ 255.663743] cx23885: cx23885[0]: iq d: 0xf85c9a70 [ arg #1 ]
[ 255.663746] cx23885: cx23885[0]: iq e: 0x00000000 [ arg #2 ]
[ 255.663749] cx23885: cx23885[0]: (0x0001066c) iq f:
[ 255.663750] 0x1c0002f0 [ write sol eol count=752 ]
[ 255.663755] cx23885: cx23885[0]: iq 10: 0xf4fa2920 [ arg #1 ]
[ 255.663758] cx23885: cx23885[0]: iq 11: 0x00000000 [ arg #2 ]
[ 255.663759] cx23885: cx23885[0]: fifo: 0x00005000 -> 0x6000
[ 255.663760] cx23885: cx23885[0]: ctrl: 0x00010630 -> 0x10690
[ 255.663764] cx23885: cx23885[0]: ptr1_reg: 0x00005980
[ 255.663767] cx23885: cx23885[0]: ptr2_reg: 0x000108a8
[ 255.663770] cx23885: cx23885[0]: cnt1_reg: 0x0000000b
[ 255.663773] cx23885: cx23885[0]: cnt2_reg: 0x00000003

Included is checks of the TC_REQ and TC_REQ_SET registers during states
of board initialization, reset, DMA start, and DMA stop. If both registers
are set, this indicates a stall in the RiSC engine, at which point the
bridge error is cleared.

A small delay is introduced in stop_dma as well, to allow transfers in
progress to finish.

After application all models work on Ryzen, occasionally yielding:

cx23885_clear_bridge_error: dma in progress detected 0x00000001 0x00000001, clearing

Signed-off-by: Brad Love <brad@nextdimension.cc>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
[hansverk@cisco.com: fix compiler warning of unused 'reg' variable]
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

[media] cx23885: remove FSF address as per checkpatch

These addresses are usually out-of-date and the top-level license will
always have the right address. So drop it from these sources.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

[media] rename most media/video pci drivers to media/pci

Rename all PCI drivers with their own directory under
drivers/media/video into drivers/media/pci and update the
building system.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>