forked from luck/tmp_suning_uos_patched
soundwire: intel_init: add kernel module parameter to filter out links
The hardware and ACPI info may report the presence of links that are not physically enabled (e.g. due to pin-muxing or hardware reworks), which in turn can result in errors being thrown. This shouldn't be the case for production devices but will happen a lot on development devices - even more so when they expose a connector. Even when the ACPI information is correct, it's useful to be able to only enable the links that need attention - mostly to filter out dynamic debug messages. Add a module parameter to filter out such links, e.g. adding the following config to a file in /etc/modprobe.d will select the second and third links only. options soundwire_intel_init sdw_link_mask=0x6 Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20190806005522.22642-16-pierre-louis.bossart@linux.intel.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
parent
a50954e211
commit
50302fc7b9
|
@ -22,6 +22,10 @@
|
|||
#define SDW_LINK_BASE 0x30000
|
||||
#define SDW_LINK_SIZE 0x10000
|
||||
|
||||
static int link_mask;
|
||||
module_param_named(sdw_link_mask, link_mask, int, 0444);
|
||||
MODULE_PARM_DESC(sdw_link_mask, "Intel link mask (one bit per link)");
|
||||
|
||||
struct sdw_link_data {
|
||||
struct sdw_intel_link_res res;
|
||||
struct platform_device *pdev;
|
||||
|
@ -111,6 +115,13 @@ static struct sdw_intel_ctx
|
|||
|
||||
/* Create SDW Master devices */
|
||||
for (i = 0; i < count; i++) {
|
||||
if (link_mask && !(link_mask & BIT(i))) {
|
||||
dev_dbg(&adev->dev,
|
||||
"Link %d masked, will not be enabled\n", i);
|
||||
link++;
|
||||
continue;
|
||||
}
|
||||
|
||||
link->res.irq = res->irq;
|
||||
link->res.registers = res->mmio_base + SDW_LINK_BASE
|
||||
+ (SDW_LINK_SIZE * i);
|
||||
|
|
Loading…
Reference in New Issue
Block a user