From: Alexander Usyskin <alexander.usyskin@intel.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jani Nikula <jani.nikula@linux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@intel.com>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>
Cc: Tomas Winkler <tomas.winkler@intel.com>,
Alexander Usyskin <alexander.usyskin@intel.com>,
Vitaly Lubart <vitaly.lubart@intel.com>,
intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: [PATCH v3 3/5] mei: gsc: setup char driver alive in spite of firmware handshake failure
Date: Thu, 20 Jan 2022 16:53:49 +0200 [thread overview]
Message-ID: <20220120145351.520555-4-alexander.usyskin@intel.com> (raw)
In-Reply-To: <20220120145351.520555-1-alexander.usyskin@intel.com>
Setup char device in spite of firmware handshake failure.
In order to provide host access to the firmware status registers and other
information required for the manufacturing process.
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
drivers/misc/mei/gsc-me.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
index 8673ad5f0015..f58e54d2c1fc 100644
--- a/drivers/misc/mei/gsc-me.c
+++ b/drivers/misc/mei/gsc-me.c
@@ -79,11 +79,12 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev,
pm_runtime_set_active(device);
pm_runtime_enable(device);
- if (mei_start(dev)) {
- dev_err(device, "init hw failure.\n");
- ret = -ENODEV;
- goto err;
- }
+ /* Continue to char device setup in spite of firmware handshake failure.
+ * In order to provide access to the firmware status registers to the user
+ * space via sysfs.
+ */
+ if (mei_start(dev))
+ dev_warn(device, "init hw failure.\n");
pm_runtime_set_autosuspend_delay(device, MEI_GSC_RPM_TIMEOUT);
pm_runtime_use_autosuspend(device);
--
2.32.0
next prev parent reply other threads:[~2022-01-20 14:54 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-20 14:53 [PATCH v3 0/5] Add driver for GSC controller Alexander Usyskin
2022-01-20 14:53 ` [PATCH v3 1/5] drm/i915/gsc: add gsc as a mei auxiliary device Alexander Usyskin
2022-01-20 14:53 ` [PATCH v3 2/5] mei: add support for graphics system controller (gsc) devices Alexander Usyskin
2022-01-20 14:53 ` Alexander Usyskin [this message]
2022-01-20 14:53 ` [PATCH v3 4/5] mei: gsc: add runtime pm handlers Alexander Usyskin
2022-01-20 14:53 ` [PATCH v3 5/5] mei: gsc: retrieve the firmware version Alexander Usyskin
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