linux-dev/drivers/firmware/cirrus, branch master

firmware: cs_dsp: Add memory chunk helpers

2022-07-22T12:40:00Z

Add helpers that can be layered on top of a buffer read from or to be written to the DSP to faciliate accessing datastructures within the DSP memory. These functions handle adding the padding bytes for the DSP, converting to big endian, and packing arbitrary length data. Signed-off-by: Charles Keepax Link: https://lore.kernel.org/r/20220722094851.92521-2-ckeepax@opensource.cirrus.com Signed-off-by: Mark Brown

firmware: cs_dsp: Add pre_stop callback

2022-07-22T12:39:59Z

The code already has a post_stop callback, add a matching pre_stop callback to the client_ops that is called before execution is stopped. This callback provides a convenient place for the client code to communicate with the DSP before it is stopped. Signed-off-by: Charles Keepax Link: https://lore.kernel.org/r/20220722094851.92521-1-ckeepax@opensource.cirrus.com Signed-off-by: Mark Brown

firmware: cs_dsp: Fix overrun of unterminated control name string

2022-04-12T16:57:04Z

For wmfw format v2 and later the coefficient name strings have a length field and are NOT null-terminated. Use kasprintf() to convert the unterminated string into a null-terminated string in an allocated buffer. The previous code handled this duplication incorrectly using kmemdup() and getting the length from a strlen() of the (unterminated) source string. This resulted in creating a string that continued up to the next byte in the firmware file that just happened to be 0x00. Signed-off-by: Richard Fitzgerald Fixes: f6bc909e7673 ("firmware: cs_dsp: add driver to support firmware loading on Cirrus Logic DSPs") Link: https://lore.kernel.org/r/20220412163927.1303470-1-rf@opensource.cirrus.com Signed-off-by: Mark Brown

firmware: cs_dsp: Clear core reset for cache

2022-01-05T13:53:53Z

If the Halo registers are kept in the register cache the HALO_CORE_RESET bit will be retained as 1 after reset is triggered in cs_dsp_halo_start_core. This will cause subsequent writes to reset the core which is not desired. Apart from this bit the rest of the register bits are cacheable, so for safety sake clear the bit to ensure the cache is consistent. Signed-off-by: Charles Keepax Link: https://lore.kernel.org/r/20220105113026.18955-6-ckeepax@opensource.cirrus.com Signed-off-by: Mark Brown

firmware: cs_dsp: Move lockdep asserts to avoid potential null pointer

2021-11-30T13:08:12Z

Move the lockdep asserts until after the ctl pointer has been checked for NULL, to avoid potentially NULL pointer dereferences. Fixes: fb2f364fb5b9 ("firmware: cs_dsp: Add lockdep asserts to interface functions") Reported-by: kernel test robot Reported-by: Dan Carpenter Signed-off-by: Charles Keepax Link: https://lore.kernel.org/r/20211130102842.26410-1-ckeepax@opensource.cirrus.com Signed-off-by: Mark Brown

firmware: cs_dsp: Allow creation of event controls

2021-11-17T22:16:28Z

Some firmwares contain controls intended to convey firmware state back to the host. Whilst more infrastructure will probably be needed for these in time, as a first step allow creation of the controls, so said firmwares arn't completely rejected. Signed-off-by: Charles Keepax Link: https://lore.kernel.org/r/20211117132300.1290-10-ckeepax@opensource.cirrus.com Signed-off-by: Mark Brown

firmware: cs_dsp: Add offset to cs_dsp read/write

2021-11-17T22:16:27Z

Provide a mechanism to access only part of a control through the cs_dsp interface. Signed-off-by: Charles Keepax Link: https://lore.kernel.org/r/20211117132300.1290-9-ckeepax@opensource.cirrus.com Signed-off-by: Mark Brown

firmware: cs_dsp: Clarify some kernel doc comments

2021-11-17T22:16:26Z

Signed-off-by: Charles Keepax Link: https://lore.kernel.org/r/20211117132300.1290-8-ckeepax@opensource.cirrus.com Signed-off-by: Mark Brown

firmware: cs_dsp: Perform NULL check in cs_dsp_coeff_write/read_ctrl

2021-11-17T22:16:25Z

Add a NULL check to the cs_dsp_coeff_write/read_ctrl functions. This is a major convenience for users of the cs_dsp library as it allows the call to cs_dsp_get_ctl to be inlined with the call to read/write the control itself. Signed-off-by: Charles Keepax Link: https://lore.kernel.org/r/20211117132300.1290-7-ckeepax@opensource.cirrus.com Signed-off-by: Mark Brown

firmware: cs_dsp: Add support for rev 2 coefficient files

2021-11-17T22:16:24Z

Add support for the revision 2 coefficient file, this format is identical to revision 1 and was simply added by accident to some firmware. However unfortunately many firmwares have leaked into production using this and as such driver support really needs to be added for it. Signed-off-by: Charles Keepax Link: https://lore.kernel.org/r/20211117132300.1290-6-ckeepax@opensource.cirrus.com Signed-off-by: Mark Brown