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soundwire: add read_ping_status helper definition in manager ops 

The existing manager ops provide callbacks to transfer read/write
commands, but don't allow for direct access to PING status
register. This is accessible in all existing IP, and would help
diagnose timeouts or resume issues by reporting the 'true' status
instead of the internal status reported by the IP.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Acked-By: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20220714011043.46059-2-yung-chuan.liao@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2022-07-14 09:10:40 +08:00 committed by Mark Brown
parent 568035b01c
commit 874de45948
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GPG Key ID: 24D68B725D5487D0
1 changed files with 3 additions and 0 deletions
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3
include/linux/soundwire/sdw.h
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@ -839,6 +839,8 @@ struct sdw_defer {
* @set_bus_conf: Set the bus configuration
* @pre_bank_switch: Callback for pre bank switch
* @post_bank_switch: Callback for post bank switch
* @read_ping_status: Read status from PING frames, reported with two bits per Device.
* Bits 31:24 are reserved.
*/
struct sdw_master_ops {
int (*read_prop)(struct sdw_bus *bus);
@ -855,6 +857,7 @@ struct sdw_master_ops {
struct sdw_bus_params *params);
int (*pre_bank_switch)(struct sdw_bus *bus);
int (*post_bank_switch)(struct sdw_bus *bus);
u32 (*read_ping_status)(struct sdw_bus *bus);
};