Date: Mon, 17 Jun 2024 11:10:08 -0400
From: Nicolas Dufresne <nicolas@...fresne.ca>
To: Alex Bee <knaerzche@...il.com>, Detlev Casanova
	 <detlev.casanova@...labora.com>, linux-kernel@...r.kernel.org
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>, Rob Herring
 <robh@...nel.org>,  Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>, Greg Kroah-Hartman
 <gregkh@...uxfoundation.org>,  Sebastian Reichel
 <sebastian.reichel@...labora.com>, Dragan Simic <dsimic@...jaro.org>,
 Alexey Charkov <alchark@...il.com>, Cristian Ciocaltea
 <cristian.ciocaltea@...labora.com>,  Diederik de Haas
 <didi.debian@...ow.org>, Andy Yan <andy.yan@...k-chips.com>,
 linux-media@...r.kernel.org,  devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org,  linux-rockchip@...ts.infradead.org,
 linux-staging@...ts.linux.dev
Subject: Re: [PATCH 1/3] media: rockchip: Introduce the rkvdec2 driver

Hi Alex,

Le lundi 17 juin 2024 à 06:49 +0200, Alex Bee a écrit :
> Hi,
> Am 15.06.24 um 03:56 schrieb Detlev Casanova:
> > This driver supports the second generation of the Rockchip Video
> > decoder, also known as vdpu34x.
> > It is currently only used on the RK3588(s) SoC.
> > 
> > There are 2 decoders on the RK3588 SoC that can work in pair to decode
> > 8K video at 30 FPS but currently, only using one core at a time is
> > supported.
> > 
> > Scheduling requests between the two cores will be implemented later.
> 
> Regarding the cores:
> Did anyone of you ever check the CCU (which I tink stands for central
> control unit). This feature doesn't seem to be implemented by the BSP
> (neither kernel nor mpp), but the configuration workflow is described
> pretty well in RK3588's TRM v 1.0 ("5.6.5 VDPU381 CCU configuration flow",
> page 676): It "sounds" a lot like with this enabled you do not even haven
> to care about scheduling/concurrency ... whatever for the cores - you're
> just saying how much cores you want to use and the rest is done by this HW
> block. I'm mentioning this early in the iterarration of this series as is

I saw the reference in the documentation, but could not understand how the
scheduler there can work. I believe we are missing the documentation for the CCU
configuration binary that needs to be passed to sw_ccu_llp_cfg_addr. The CCU
also seems to have a sequence to apply this configuration (see
RKVDEC_CCU_SWREG3_CCU_CONFIG_DONE register), this is also not clear to me.

Overall, its not clear to be that the CCU can actually schedule multiple streams
concurrently. The biggest hint toward this is that it reports the completion
base on the frame number, a method that completely fall appart if you have
multiple streams. Until Rockchip demonstrate how this chip can work, I don't
think we'll have much success. This might also mean that link mode is something
to be ignored for now.

> it might / would infect DT modeling. The same is true, btw., for the 4
> hantro H1 encoder cores: They can also be controled by a (own) CCU.

The CCU seems to be only usable for the RKVDEC IP, I don't believe you can use
it for the modified Hantro H1 encoders array.

As scheduling will be needed anyway for the Hantro H1 array, to fix issues with
Mediatek VCODEC dual stages (with a core per stage), and even possibly for
future upstreaming of RPi4/5 HEVC decoder which has dual stage, 1 core.

Intermediate implementation can simply schedule different streams to different
cores concurrently, with 4K limitation, that would be the same method for H1
array. Scheduling a mix of 8K + <4K streams is slightly more complex, as you
want  a way to not starve the 8K streams.

> 
> > The core supports H264, HEVC, VP9 and AVS2 decoding but this driver
> > currently only supports H264.
> > 
> > The driver is based on rkvdec and they may share some code in the
> > future.
> > The decision to make a different driver is mainly because rkvdec2 has
> > more features and can work with multiple cores.
> > 
> > The registers are mapped in a struct in RAM using bitfields. It is IO
> > copied to the HW when all values are configured.
> > The decision to use such a struct instead of writing buffers one by one
> > is based on the following reasons:
> >   - Rockchip cores are known to misbehave when registers are not written
> >     in address order,
> 
> Could you please outline what makes you come to that conclusion?

Should be rephrased, since its Hantro core that is known having side effect
while writing the registers:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1b3bb574569e5fe5aeb0a9c73848430b7e271c20

But we all noticed how similar RKVDEC IP can be, and we can combine with the
fact that this is also what the mpp services driver do, meaning how the HW has
been validated to work.

> 
> >   - Those cores also need the software to write all registers, even if
> >     they are written their default values or are not related to the task
> >     (this core will not start decoding some H264 frames if some VP9
> >     registers are not written to 0)
> >   - In the future, to support multiple cores, the scheduler could be
> >     optimized by storing the precomputed registers values and copy them
> >     to the HW as soos as a core becomes available.
> > 
> ....
> 
> > +/*
> > + * Constant CABAC table.
> > + */
> > +static const u32 rkvdec2_h264_cabac_table[928] = {
> > +	0x3602f114, 0xf1144a03, 0x4a033602, 0x68e97fe4, 0x36ff35fa, 0x21173307,
> > +	0x00150217, 0x31000901, 0x390576db, 0x41f54ef3, 0x310c3e01, 0x321149fc,
> > +	0x2b094012, 0x431a001d, 0x68095a10, 0x68ec7fd2, 0x4ef34301, 0x3e0141f5,
> > +	0x5fef56fa, 0x2d093dfa, 0x51fa45fd, 0x370660f5, 0x56fb4307, 0x3a005802,
> > +	0x5ef64cfd, 0x45043605, 0x580051fd, 0x4afb43f9, 0x50fb4afc, 0x3a0148f9,
> > +	0x3f002900, 0x3f003f00, 0x560453f7, 0x48f96100, 0x3e03290d, 0x4efc2d00,
> > +	0x7ee560fd, 0x65e762e4, 0x52e443e9, 0x53f05eec, 0x5beb6eea, 0x5df366ee,
> > +	0x5cf97fe3, 0x60f959fb, 0x2efd6cf3, 0x39ff41ff, 0x4afd5df7, 0x57f85cf7,
> > +	0x36057ee9, 0x3b063c06, 0x30ff4506, 0x45fc4400, 0x55fe58f8, 0x4bff4efa,
> > +	0x36024df9, 0x44fd3205, 0x2a063201, 0x3f0151fc, 0x430046fc, 0x4cfe3902,
> > +	0x4004230b, 0x230b3d01, 0x180c1912, 0x240d1d0d, 0x49f95df6, 0x2e0d49fe,
> > +	0x64f93109, 0x35023509, 0x3dfe3505, 0x38003800, 0x3cfb3ff3, 0x39043eff,
> > +	0x390445fa, 0x3304270e, 0x4003440d, 0x3f093d01, 0x27103207, 0x34042c05,
> > +	0x3cfb300b, 0x3b003bff, 0x2c052116, 0x4eff2b0e, 0x45093c00, 0x28021c0b,
> > +	0x31002c03, 0x2c022e00, 0x2f003302, 0x3e022704, 0x36002e06, 0x3a023603,
> > +	0x33063f04, 0x35073906, 0x37063406, 0x240e2d0b, 0x52ff3508, 0x4efd3707,
> > +	0x1f162e0f, 0x071954ff, 0x031cf91e, 0x0020041c, 0x061eff22, 0x0920061e,
> > +	0x1b1a131f, 0x14251e1a, 0x4611221c, 0x3b054301, 0x1e104309, 0x23122012,
> > +	0x1f181d16, 0x2b122617, 0x3f0b2914, 0x40093b09, 0x59fe5eff, 0x4cfa6cf7,
> > +	0x2d002cfe, 0x40fd3400, 0x46fc3bfe, 0x52f84bfc, 0x4df766ef, 0x2a001803,
> > +	0x37003000, 0x47f93bfa, 0x57f553f4, 0x3a0177e2, 0x24ff1dfd, 0x2b022601,
> > +	0x3a0037fa, 0x4afd4000, 0x46005af6, 0x1f051dfc, 0x3b012a07, 0x48fd3afe,
> > +	0x61f551fd, 0x05083a00, 0x120e0e0a, 0x28021b0d, 0x46fd3a00, 0x55f84ffa,
> > +	0x6af30000, 0x57f66af0, 0x6eee72eb, 0x6eea62f2, 0x67ee6aeb, 0x6ce96beb,
> > +	0x60f670e6, 0x5bfb5ff4, 0x5eea5df7, 0x430956fb, 0x55f650fc, 0x3c0746ff,
> > +	0x3d053a09, 0x320f320c, 0x36113112, 0x2e07290a, 0x310733ff, 0x29093408,
> > +	0x37022f06, 0x2c0a290d, 0x35053206, 0x3f04310d, 0x45fe4006, 0x46063bfe,
> > +	0x1f092c0a, 0x35032b0c, 0x260a220e, 0x280d34fd, 0x2c072011, 0x320d2607,
> > +	0x2b1a390a, 0x0e0b0b0e, 0x0b120b09, 0xfe170915, 0xf120f120, 0xe927eb22,
> > +	0xe129df2a, 0xf426e42e, 0xe82d1d15, 0xe630d335, 0xed2bd541, 0x091ef627,
> > +	0x1b141a12, 0x52f23900, 0x61ed4bfb, 0x001b7ddd, 0xfc1f001c, 0x0822061b,
> > +	0x16180a1e, 0x20161321, 0x29151f1a, 0x2f172c1a, 0x470e4110, 0x3f063c08,
> > +	0x18154111, 0x171a1417, 0x171c201b, 0x2817181c, 0x1d1c2018, 0x39132a17,
> > +	0x3d163516, 0x280c560b, 0x3b0e330b, 0x47f94ffc, 0x46f745fb, 0x44f642f8,
> > +	0x45f449ed, 0x43f146f0, 0x46ed3eec, 0x41ea42f0, 0xfe093fec, 0xf721f71a,
> > +	0xfe29f927, 0x0931032d, 0x3b241b2d, 0x23f942fa, 0x2df82af9, 0x38f430fb,
> > +	0x3efb3cfa, 0x4cf842f8, 0x51fa55fb, 0x51f94df6, 0x49ee50ef, 0x53f64afc,
> > +	0x43f747f7, 0x42f83dff, 0x3b0042f2, 0xf3153b02, 0xf927f221, 0x0233fe2e,
> > +	0x113d063c, 0x3e2a2237, 0x00000000, 0x00000000, 0x3602f114, 0xf1144a03,
> > +	0x4a033602, 0x68e97fe4, 0x36ff35fa, 0x19163307, 0x00100022, 0x290409fe,
> > +	0x410276e3, 0x4ff347fa, 0x32093405, 0x360a46fd, 0x1613221a, 0x02390028,
> > +	0x451a2429, 0x65f17fd3, 0x47fa4cfc, 0x34054ff3, 0x5af34506, 0x2b083400,
> > +	0x52fb45fe, 0x3b0260f6, 0x57fd4b02, 0x380164fd, 0x55fa4afd, 0x51fd3b00,
> > +	0x5ffb56f9, 0x4dff42ff, 0x56fe4601, 0x3d0048fb, 0x3f002900, 0x3f003f00,
> > +	0x560453f7, 0x48f96100, 0x3e03290d, 0x33070f0d, 0x7fd95002, 0x60ef5bee,
> > +	0x62dd51e6, 0x61e966e8, 0x63e877e5, 0x66ee6eeb, 0x50007fdc, 0x5ef959fb,
> > +	0x27005cfc, 0x54f14100, 0x49fe7fdd, 0x5bf768f4, 0x37037fe1, 0x37073807,
> > +	0x35fd3d08, 0x4af94400, 0x67f358f7, 0x59f75bf3, 0x4cf85cf2, 0x6ee957f4,
> > +	0x4ef669e8, 0x63ef70ec, 0x7fba7fb2, 0x7fd27fce, 0x4efb42fc, 0x48f847fc,
> > +	0x37ff3b02, 0x4bfa46f9, 0x77de59f8, 0x14204bfd, 0x7fd4161e, 0x3dfb3600,
> > +	0x3cff3a00, 0x43f83dfd, 0x4af254e7, 0x340541fb, 0x3d003902, 0x46f545f7,
> > +	0x47fc3712, 0x3d073a00, 0x19122909, 0x2b052009, 0x2c002f09, 0x2e023300,
> > +	0x42fc2613, 0x2a0c260f, 0x59002209, 0x1c0a2d04, 0xf5211f0a, 0x0f12d534,
> > +	0xea23001c, 0x0022e726, 0xf420ee27, 0x0000a266, 0xfc21f138, 0xfb250a1d,
> > +	0xf727e333, 0xc645de34, 0xfb2cc143, 0xe3370720, 0x00000120, 0xe721241b,
> > +	0xe424e222, 0xe526e426, 0xf023ee22, 0xf820f222, 0x0023fa25, 0x121c0a1e,
> > +	0x291d191a, 0x48024b00, 0x230e4d08, 0x23111f12, 0x2d111e15, 0x2d122a14,
> > +	0x36101a1b, 0x38104207, 0x430a490b, 0x70e974f6, 0x3df947f1, 0x42fb3500,
> > +	0x50f74df5, 0x57f654f7, 0x65eb7fde, 0x35fb27fd, 0x4bf53df9, 0x5bef4df1,
> > +	0x6fe76be7, 0x4cf57ae4, 0x34f62cf6, 0x3af739f6, 0x45f948f0, 0x4afb45fc,
> > +	0x420256f7, 0x200122f7, 0x34051f0b, 0x43fe37fe, 0x59f84900, 0x04073403,
> > +	0x0811080a, 0x25031310, 0x49fb3dff, 0x4efc46ff, 0x7eeb0000, 0x6eec7ce9,
> > +	0x7ce77ee6, 0x79e569ef, 0x66ef75e5, 0x74e575e6, 0x5ff67adf, 0x5ff864f2,
> > +	0x72e46fef, 0x50fe59fa, 0x55f752fc, 0x48ff51f8, 0x43014005, 0x45003809,
> > +	0x45074501, 0x43fa45f9, 0x40fe4df0, 0x43fa3d02, 0x390240fd, 0x42fd41fd,
> > +	0x33093e00, 0x47fe42ff, 0x46ff4bfe, 0x3c0e48f7, 0x2f002510, 0x250b2312,
> > +	0x290a290c, 0x290c3002, 0x3b00290d, 0x28133203, 0x32124203, 0xfa12fa13,
> > +	0xf41a000e, 0xe721f01f, 0xe425ea21, 0xe22ae227, 0xdc2dd62f, 0xef29de31,
> > +	0xb9450920, 0xc042c13f, 0xd936b64d, 0xf629dd34, 0xff280024, 0x1a1c0e1e,
> > +	0x370c2517, 0xdf25410b, 0xdb28dc27, 0xdf2ee226, 0xe828e22a, 0xf426e331,
> > +	0xfd26f628, 0x141ffb2e, 0x2c191e1d, 0x310b300c, 0x16162d1a, 0x151b1617,
> > +	0x1c1a1421, 0x221b181e, 0x27192a12, 0x460c3212, 0x470e3615, 0x2019530b,
> > +	0x36153115, 0x51fa55fb, 0x51f94df6, 0x49ee50ef, 0x53f64afc, 0x43f747f7,
> > +	0x42f83dff, 0x3b0042f2, 0xf6113b02, 0xf72af320, 0x0035fb31, 0x0a440340,
> > +	0x392f1b42, 0x180047fb, 0x2afe24ff, 0x39f734fe, 0x41fc3ffa, 0x52f943fc,
> > +	0x4cfd51fd, 0x4efa48f9, 0x44f248f4, 0x4cfa46fd, 0x3efb42fb, 0x3dfc3900,
> > +	0x36013cf7, 0xf6113a02, 0xf72af320, 0x0035fb31, 0x0a440340, 0x392f1b42,
> > +	0x00000000, 0x00000000, 0x3602f114, 0xf1144a03, 0x4a033602, 0x68e97fe4,
> > +	0x36ff35fa, 0x101d3307, 0x000e0019, 0x3efd33f6, 0x101a63e5, 0x66e855fc,
> > +	0x39063905, 0x390e49ef, 0x0a142814, 0x0036001d, 0x610c2a25, 0x75ea7fe0,
> > +	0x55fc4afe, 0x390566e8, 0x58f25dfa, 0x37042cfa, 0x67f159f5, 0x391374eb,
> > +	0x54043a14, 0x3f016006, 0x6af355fb, 0x4b063f05, 0x65ff5afd, 0x4ffc3703,
> > +	0x61f44bfe, 0x3c0132f9, 0x3f002900, 0x3f003f00, 0x560453f7, 0x48f96100,
> > +	0x3e03290d, 0x58f72207, 0x7fdc7fec, 0x5ff25bef, 0x56e754e7, 0x5bef59f4,
> > +	0x4cf27fe1, 0x5af367ee, 0x500b7fdb, 0x54024c05, 0x37fa4e05, 0x53f23d04,
> > +	0x4ffb7fdb, 0x5bf568f5, 0x41007fe2, 0x48004ffe, 0x38fa5cfc, 0x47f84403,
> > +	0x56fc62f3, 0x52fb58f4, 0x43fc48fd, 0x59f048f8, 0x3bff45f7, 0x39044205,
> > +	0x47fe47fc, 0x4aff3a02, 0x45ff2cfc, 0x33f93e00, 0x2afa2ffc, 0x35fa29fd,
> > +	0x4ef74c08, 0x340953f5, 0x5afb4300, 0x48f14301, 0x50f84bfb, 0x40eb53eb,
> > +	0x40e71ff3, 0x4b095ee3, 0x4af83f11, 0x1bfe23fb, 0x41035b0d, 0x4d0845f9,
> > +	0x3e0342f6, 0x51ec44fd, 0x07011e00, 0x4aeb17fd, 0x7ce94210, 0xee2c2511,
> > +	0x7feade32, 0x2a002704, 0x1d0b2207, 0x25061f08, 0x28032a07, 0x2b0d2108,
> > +	0x2f04240d, 0x3a023703, 0x2c083c06, 0x2a0e2c0b, 0x38043007, 0x250d3404,
> > +	0x3a133109, 0x2d0c300a, 0x21144500, 0xee233f08, 0xfd1ce721, 0x001b0a18,
> > +	0xd434f222, 0x1113e827, 0x1d24191f, 0x0f222118, 0x4916141e, 0x1f132214,
> > +	0x10132c1b, 0x240f240f, 0x15191c15, 0x0c1f141e, 0x2a18101b, 0x380e5d00,
> > +	0x261a390f, 0x73e87fe8, 0x3ef752ea, 0x3b003500, 0x59f355f2, 0x5cf55ef3,
> > +	0x64eb7fe3, 0x43f439f2, 0x4df647f5, 0x58f055eb, 0x62f168e9, 0x52f67fdb,
> > +	0x3df830f8, 0x46f942f8, 0x4ff64bf2, 0x5cf453f7, 0x4ffc6cee, 0x4bf045ea,
> > +	0x3a013afe, 0x53f74ef3, 0x63f351fc, 0x26fa51f3, 0x3afa3ef3, 0x49f03bfe,
> > +	0x56f34cf6, 0x57f653f7, 0x7fea0000, 0x78e77fe7, 0x72ed7fe5, 0x76e775e9,
> > +	0x71e875e6, 0x78e176e4, 0x5ef67cdb, 0x63f666f1, 0x7fce6af3, 0x39115cfb,
> > +	0x5ef356fb, 0x4dfe5bf4, 0x49ff4700, 0x51f94004, 0x390f4005, 0x44004301,
> > +	0x440143f6, 0x40024d00, 0x4efb4400, 0x3b053707, 0x360e4102, 0x3c052c0f,
> > +	0x4cfe4602, 0x460c56ee, 0x46f44005, 0x3805370b, 0x41024500, 0x36054afa,
> > +	0x4cfa3607, 0x4dfe52f5, 0x2a194dfe, 0xf710f311, 0xeb1bf411, 0xd829e225,
> > +	0xd130d72a, 0xd82ee027, 0xd72ecd34, 0xed2bd934, 0xc93d0b20, 0xce3ed238,
> > +	0xec2dbd51, 0x0f1cfe23, 0x01270122, 0x2614111e, 0x360f2d12, 0xf0244f00,
> > +	0xef25f225, 0x0f220120, 0x19180f1d, 0x101f1622, 0x1c1f1223, 0x1c242921,
> > +	0x3e152f1b, 0x1a131f12, 0x17181824, 0x1e18101b, 0x29161d1f, 0x3c102a16,
> > +	0x3c0e340f, 0x7bf04e03, 0x38163515, 0x21153d19, 0x3d113213, 0x4af84efd,
> > +	0x48f648f7, 0x47f44bee, 0x46fb3ff5, 0x48f24bef, 0x35f843f0, 0x34f73bf2,
> > +	0xfe0944f5, 0xfc1ff61e, 0x0721ff21, 0x17250c1f, 0x4014261f, 0x25f947f7,
> > +	0x31f52cf8, 0x3bf438f6, 0x43f73ff8, 0x4ff644fa, 0x4af84efd, 0x48f648f7,
> > +	0x47f44bee, 0x46fb3ff5, 0x48f24bef, 0x35f843f0, 0x34f73bf2, 0xfe0944f5,
> > +	0xfc1ff61e, 0x0721ff21, 0x17250c1f, 0x4014261f, 0x00000000, 0x00000000,
> > +	0x3602f114, 0xf1144a03, 0x4a033602, 0x68e97fe4, 0x36ff35fa, 0x00003307,
> > +	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
> > +	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
> > +	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
> > +	0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
> > +	0x3f002900, 0x3f003f00, 0x560453f7, 0x48f96100, 0x3e03290d, 0x37010b00,
> > +	0x7fef4500, 0x520066f3, 0x6beb4af9, 0x7fe17fe5, 0x5fee7fe8, 0x72eb7fe5,
> > +	0x7bef7fe2, 0x7af073f4, 0x3ff473f5, 0x54f144fe, 0x46fd68f3, 0x5af65df8,
> > +	0x4aff7fe2, 0x5bf961fa, 0x38fc7fec, 0x4cf952fb, 0x5df97dea, 0x4dfd57f5,
> > +	0x3ffc47fb, 0x54f444fc, 0x41f93ef9, 0x38053d08, 0x400142fe, 0x4efe3d00,
> > +	0x34073201, 0x2c00230a, 0x2d01260b, 0x2c052e00, 0x3301111f, 0x131c3207,
> > +	0x3e0e2110, 0x64f16cf3, 0x5bf365f3, 0x58f65ef4, 0x56f654f0, 0x57f353f9,
> > +	0x46015eed, 0x4afb4800, 0x66f83b12, 0x5f0064f1, 0x48024bfc, 0x47fd4bf5,
> > +	0x45f32e0f, 0x41003e00, 0x48f12515, 0x36103909, 0x480c3e00, 0x090f0018,
> > +	0x120d1908, 0x130d090f, 0x120c250a, 0x21141d06, 0x2d041e0f, 0x3e003a01,
> > +	0x260c3d07, 0x270f2d0b, 0x2c0d2a0b, 0x290c2d10, 0x221e310a, 0x370a2a12,
> > +	0x2e113311, 0xed1a5900, 0xef1aef16, 0xec1ce71e, 0xe525e921, 0xe428e921,
> > +	0xf521ef26, 0xfa29f128, 0x11290126, 0x031bfa1e, 0xf025161a, 0xf826fc23,
> > +	0x0325fd26, 0x002a0526, 0x16271023, 0x251b300e, 0x440c3c15, 0x47fd6102,
> > +	0x32fb2afa, 0x3efe36fd, 0x3f013a00, 0x4aff48fe, 0x43fb5bf7, 0x27fd1bfb,
> > +	0x2e002cfe, 0x44f840f0, 0x4dfa4ef6, 0x5cf456f6, 0x3cf637f1, 0x41fc3efa,
> > +	0x4cf849f4, 0x58f750f9, 0x61f56eef, 0x4ff554ec, 0x4afc49fa, 0x60f356f3,
> > +	0x75ed61f5, 0x21fb4ef8, 0x35fe30fc, 0x47f33efd, 0x56f44ff6, 0x61f25af3,
> > +	0x5dfa0000, 0x4ff854fa, 0x47ff4200, 0x3cfe3e00, 0x4bfb3bfe, 0x3afc3efd,
> > +	0x4fff42f7, 0x44034700, 0x3ef92c0a, 0x280e240f, 0x1d0c1b10, 0x24142c01,
> > +	0x2a052012, 0x3e0a3001, 0x40092e11, 0x61f568f4, 0x58f960f0, 0x55f955f8,
> > +	0x58f355f7, 0x4dfd4204, 0x4cfa4cfd, 0x4cff3a0a, 0x63f953ff, 0x5f025ff2,
> > +	0x4afb4c00, 0x4bf54600, 0x41004401, 0x3e0349f2, 0x44ff3e04, 0x370b4bf3,
> > +	0x460c4005, 0x1306060f, 0x0e0c1007, 0x0b0d0d12, 0x100f0f0d, 0x170d170c,
> > +	0x1a0e140f, 0x28112c0e, 0x11182f11, 0x16191515, 0x1d161b1f, 0x320e2313,
> > +	0x3f07390a, 0x52fc4dfe, 0x45095efd, 0xdd246df4, 0xe620de24, 0xe02ce225,
> > +	0xf122ee22, 0xf921f128, 0x0021fb23, 0x0d210226, 0x3a0d2317, 0x001afd1d,
> > +	0xf91f1e16, 0xfd22f123, 0xff240322, 0x0b200522, 0x0c220523, 0x1d1e0b27,
> > +	0x271d1a22, 0x151f4213, 0x32191f1f, 0x70ec78ef, 0x55f572ee, 0x59f25cf1,
> > +	0x51f147e6, 0x440050f2, 0x38e846f2, 0x32e844e9, 0xf3174af5, 0xf128f31a,
> > +	0x032cf231, 0x222c062d, 0x52133621, 0x17ff4bfd, 0x2b012201, 0x37fe3600,
> > +	0x40013d00, 0x5cf74400, 0x61f36af2, 0x5af45af1, 0x49f658ee, 0x56f24ff7,
> > +	0x46f649f6, 0x42fb45f6, 0x3afb40f7, 0xf6153b02, 0xf81cf518, 0x031dff1c,
> > +	0x1423091d, 0x430e241d, 0x00000000, 0x00000000
> > +};
> 
> If I'm seeing it correctly the H.264 CABAC table it the same like for the
> old rkvdec version. Boris did such a great job with constructing it based
> on the standard. Please reuse it instead of pasting blobs.

I agree, lets do that. If we could have only 1 standard copy and translate from
it, that would be even better, though many have tried and failed already.

> 
> > +
> > +static void assemble_hw_pps(struct rkvdec2_ctx *ctx,
> > +			    struct rkvdec2_h264_run *run)
> > +{
> > +	struct rkvdec2_h264_ctx *h264_ctx = ctx->priv;
> > +	const struct v4l2_ctrl_h264_sps *sps = run->sps;
> > +	const struct v4l2_ctrl_h264_pps *pps = run->pps;
> > +	const struct v4l2_ctrl_h264_decode_params *dec_params = run->decode_params;
> > +	const struct v4l2_h264_dpb_entry *dpb = dec_params->dpb;
> > +	struct rkvdec2_h264_priv_tbl *priv_tbl = h264_ctx->priv_tbl.cpu;
> > +	struct rkvdec2_sps_pps *hw_ps;
> > +	dma_addr_t scaling_list_address;
> > +	u32 scaling_distance;
> > +	u32 i;
> 
> ....
> 
> > +	__iowrite32_copy_full(rkvdec->regs + OFFSET_COMMON_REGS,
> > +			      &h264_ctx->regs.common,
> > +			      sizeof(h264_ctx->regs.common));
> This will limit the driver to arm64 which is not great. Rockchip is still
> inventing (vision) SoCs based on arm which might want to use this driver as
> well. So there should be at least an alternative.
> 
> Alex
> 
> 

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