From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To: alsa-devel@alsa-project.org
Cc: linux-kernel@vger.kernel.org, tiwai@suse.de, broonie@kernel.org,
vkoul@kernel.org, gregkh@linuxfoundation.org, jank@cadence.com,
srinivas.kandagatla@linaro.org, Blauciak@vger.kernel.org,
Slawomir <slawomir.blauciak@intel.com>,
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
Sanyog Kale <sanyog.r.kale@intel.com>
Subject: [PATCH 15/17] soundwire: intel_init: add kernel module parameter to filter out links
Date: Mon, 5 Aug 2019 19:55:20 -0500 [thread overview]
Message-ID: <20190806005522.22642-16-pierre-louis.bossart@linux.intel.com> (raw)
In-Reply-To: <20190806005522.22642-1-pierre-louis.bossart@linux.intel.com>
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>
---
drivers/soundwire/intel_init.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
index 70637a0383d2..b74c2f144962 100644
--- a/drivers/soundwire/intel_init.c
+++ b/drivers/soundwire/intel_init.c
@@ -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);
--
2.20.1
next prev parent reply other threads:[~2019-08-06 0:55 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-06 0:55 [PATCH 00/17] soundwire: fixes for 5.4 Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 01/17] soundwire: intel: prevent possible dereference in hw_params Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 02/17] soundwire: intel: fix channel number reported by hardware Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 03/17] soundwire: cadence_master: revisit interrupt settings Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 04/17] soundwire: bus: improve dynamic debug comments for enumeration Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 05/17] soundwire: export helpers to find row and column values Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 06/17] soundwire: cadence_master: use firmware defaults for frame shape Pierre-Louis Bossart
2019-08-06 15:27 ` Cezary Rojewski
2019-08-06 15:36 ` [alsa-devel] " Pierre-Louis Bossart
2019-08-06 16:06 ` Cezary Rojewski
2019-08-14 4:31 ` Vinod Koul
2019-08-14 14:03 ` Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 07/17] soundwire: include mod_devicetable.h to avoid compiling warnings Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 08/17] soundwire: stream: fix disable sequence Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 09/17] soundwire: stream: remove unnecessary variable initializations Pierre-Louis Bossart
2019-08-06 15:31 ` Cezary Rojewski
2019-08-06 15:39 ` Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 10/17] soundwire: add new mclk_freq field for properties Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 11/17] soundwire: intel: read mclk_freq property from firmware Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 12/17] soundwire: cadence_master: make use of mclk_freq property Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 13/17] soundwire: cadence_master: fix divider setting in clock register Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 14/17] soundwire: intel: handle disabled links Pierre-Louis Bossart
2019-08-06 0:55 ` Pierre-Louis Bossart [this message]
2019-08-06 0:55 ` [PATCH 16/17] soundwire: cadence_master: add kernel parameter to override interrupt mask Pierre-Louis Bossart
2019-08-06 0:55 ` [PATCH 17/17] soundwire: intel: move shutdown() callback and don't export symbol Pierre-Louis Bossart
2019-08-21 9:07 ` [PATCH 00/17] soundwire: fixes for 5.4 Vinod Koul
2019-08-21 14:03 ` [alsa-devel] " Pierre-Louis Bossart
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