On 2019-08-23 12:26, Mark Brown wrote:
On Fri, Aug 23, 2019 at 10:29:59AM +0200, Cezary Rojewski wrote:
On 2019-08-22 22:55, Pierre-Louis Bossart wrote:
On 8/22/19 2:03 PM, Cezary Rojewski wrote:
Code seen here is part of new Skylake fundament, located at the very
bottom of internal mainline. Said mainline is tested constantly on at
least sigle platform from every cAVS bucket (description below). This
week, BDW has been added to the CI family and was essential in
validating legacy changes. Baytrail platform is still missing. Changes
for BYT directly mirror HSW/ BDW but due to current lack of platform
were untested.
Boards engaged in testing: rt286, rt298, rt274.
this is not enough, sorry. these are RVPs and you need to check with
commercial devices supported in sound/soc/intel/boards/.
What machine board has to do with FW and host side? If it has, we better
notify the owner so he can fix codec's code at once. All boards MUST follow
recommended protocol whether its HDA or I2S in communicating with /skylake.
This is hardware IP we taking about. I could as well test all platforms with
AudioPrecision and say: shipit.
...
DSP "commercial devices" with 99% of home audio being routed through
HD-Audio legacy? I do contact representatives of "commercial devices" daily,
you of all should be aware of fact that in almost all cases they are fed
neither with upstream code nor upstream binaries.
For the first time since eons sound/soc/intel/skylake code is tested before
upstreaming, yet you still defend the mistakes of the past?
System vendors don't really matter here, end users with their
desktops and laptops do. If a user has a system and they for
whatever reason upgrade their kernel from one upstream version to
another and don't touch any other aspect of their system the
expectation is that they'll still have everything working after
the upgrade. This means that if there's bugs in how things were
deployed in the past the kernel ought to try to work with those
bugs.
Noted, see below comments.
Some upstream FW binaries are not compatible with existing /skylake
driver while changes found here (HARDWARE_CONFIG/ FIRMWARE_CONFIG) make
use of firmware ability to offload hardware-specifics away from driver.
These and more are core part of any cAVS design and are to be
implemented and used by host. This too is missing on Linux upstream.
This sounds like it might be a problem.
Problem is, HARDWARE/ FIRMWARE_CONFIG (and more upcoming) should be the
core part of cAVS driver, implemented before any PCM related code is added.
SKL FW binary existing on upstream is a descendant of old spt branch,
obsoleted for 4-5 years now. That FW is a stub, quickly replaced by
kbl which is to be used on all 1.5 cAVS platforms.
That's well within the lifespan people will expect from a PC
these days, my personal systems are mostly older than that and
do fine at most things except for big builds.
It's not about age itself. It's about the fact that FW binaries from
non-supported or main FW branches ended here and given the date these
have been added, it has already been recommended to make use of kbl or
apl_auto branches.
If I could, I'd rather prefer the "detect and notify" as it is impossible to
repair all the mistakes made in /sound/soc/intel/skylake.
Do we have a sense of how many such systems exist?
However, in practice there isn't any reliable way to verify the actual
usability of old FW binary against host site as the interface is volatile
and numbers alone don't mean much.
Patch with FW binaries would not remove old ones, simply add new versions to
the directory.
Can you do things the other way around and positively identify
firmwares that meet whatever standards you're interested in here?
The only thing that comes to my mind is the following:
- during boot up sequence, in response to any INVALID_REQUEST or such
coming from FW, collapse and dump: "upgrade firmware" message
- once boot up sequence is completed, disregard INVALID_REQUEST check as
it is also the common response of FW in various scenarios
- user removes existing sym link from /lib/firmware/intel and creates
new one, pointing to updated FW binary that should also be present in
/lib/firmware/intel
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