user/sven/linux.git/drivers/base/component.c, branch v5.4.90

component: Silence bind error on -EPROBE_DEFER

2020-05-27T15:46:31Z

[ Upstream commit 7706b0a76a9697021e2bf395f3f065c18f51043d ] If a component fails to bind due to -EPROBE_DEFER we should not log an error as this is not a real failure. Fixes messages like: vc4-drm soc:gpu: failed to bind 3f902000.hdmi (ops vc4_hdmi_ops): -517 vc4-drm soc:gpu: master bind failed: -517 Signed-off-by: James Hilliard Link: https://lore.kernel.org/r/20200411190241.89404-1-james.hilliard1@gmail.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin

component: do not dereference opaque pointer in debugfs

2020-02-01T09:34:35Z

commit ef9ffc1e5f1ac73ecd2fb3b70db2a3b2472ff2f7 upstream. The match data does not have to be a struct device pointer, and indeed very often is not. Attempt to treat it as such easily results in a crash. For the components that are not registered, we don't know which device is missing. Once it it is there, we can use the struct component to get the device and whether it's bound or not. Fixes: 59e73854b5fd ('component: add debugfs support') Signed-off-by: Lubomir Rintel Cc: stable Cc: Arnaud Pouliquen Link: https://lore.kernel.org/r/20191118115431.63626-1-lkundrak@v3.sk Signed-off-by: Greg Kroah-Hartman

drivers/component: kerneldoc polish

2019-02-19T12:20:35Z

Polish the kerneldoc a bit with suggestions from Randy. v2: Randy found another typo: s/compent/component/ Signed-off-by: Daniel Vetter Cc: "Rafael J. Wysocki" Cc: Daniel Vetter Cc: Ramalingam C Acked-by: Randy Dunlap Signed-off-by: Greg Kroah-Hartman

components: multiple components for a device

2019-02-08T15:58:03Z

Component framework is extended to support multiple components for a struct device. These will be matched with different masters based on its sub component value. We are introducing this, as I915 needs two different components with different subcomponent value, which will be matched to two different component masters(Audio and HDCP) based on the subcomponent values. v2: Add documenation. v3: Rebase on top of updated documenation. v4: Review from Rafael: - Remove redundant "This" from kerneldoc (also in the previous patch) - Streamline the logic in find_component() a bit. Signed-off-by: Daniel Vetter (v1 code) Signed-off-by: Ramalingam C (v1 commit message) Cc: Ramalingam C Cc: Greg Kroah-Hartman Cc: Russell King Cc: Rafael J. Wysocki Cc: Jaroslav Kysela Cc: Takashi Iwai Cc: Rodrigo Vivi Cc: Jani Nikula Reviewed-by: Greg Kroah-Hartman Reviewed-by: Rafael J. Wysocki Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20190207232759.14553-2-daniel.vetter@ffwll.ch

component: Add documentation

2019-02-08T15:57:38Z

While typing these I think doing an s/component_master/aggregate/ would be useful: - it's shorter :-) - I think component/aggregate is much more meaningful naming than component/puppetmaster or something like that. At least to my English ear "aggregate" emphasizes much more the "assemble a pile of things into something bigger" aspect, and there's not really much of a control hierarchy between aggregate and constituing components. But that's way more than a quick doc typing exercise ... Thanks to Ram for commenting on an initial draft of these docs. v2: Review from Rafael: - git add Documenation/driver-api/component.rst - lots of polish to the wording + spelling fixes. v3: Review from Russell: - s/framework/helper - clarify the documentation for component_match_add functions. v4: Remove a few superflous "This". Reviewed-by: Rafael J. Wysocki Cc: "C, Ramalingam" Cc: Greg Kroah-Hartman Cc: Russell King Cc: Rafael J. Wysocki Cc: Jaroslav Kysela Cc: Takashi Iwai Cc: Rodrigo Vivi Cc: Jani Nikula Reviewed-by: Greg Kroah-Hartman Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20190207232759.14553-1-daniel.vetter@ffwll.ch

component: convert to DEFINE_SHOW_ATTRIBUTE

2018-12-20T15:33:18Z

Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code. Signed-off-by: Yangtao Li Signed-off-by: Greg Kroah-Hartman

component: fix loop condition to call unbind() if bind() fails

2018-09-16T20:37:16Z

During component_bind_all(), if bind() fails for any particular component associated with a master, unbind() should be called for all previous components in that master's match array, whose bind() might have completed successfully. As per the current logic, if bind() fails for the component at position 'n' in the master's match array, it would start calling unbind() from component in 'n'th position itself and work backwards, and will always skip calling unbind() for component in 0th position in the master's match array. Fix this by updating the loop condition, and the logic to refer to the components in master's match array, so that unbind() is called for all components starting from 'n-1'st position in the array, until (and including) component in 0th position. Signed-off-by: Banajit Goswami Signed-off-by: Greg Kroah-Hartman

component: add debugfs support

2017-12-18T15:51:11Z

Currently there is no information in any vfs about which devices a master component consists of, what makes debugging hard if one of the component devices fails to register. Add 'device_component' directory to debugfs. Create a new file for each component master, when it has been added. Remove it on a master deletion. Show a list of devices required by the given master and their status (registered or not). This provides an easy way to check, which device has failed to register if the given master device is not available in the system. Signed-off-by: Maciej Purski Signed-off-by: Greg Kroah-Hartman

driver core: Remove redundant license text

2017-12-07T17:36:44Z

Now that the SPDX tag is in all driver core files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Johannes Berg Cc: "Luis R. Rodriguez" Signed-off-by: Greg Kroah-Hartman

driver core: add SPDX identifiers to all driver core files

2017-12-07T17:36:43Z

It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the driver core files files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Johannes Berg Cc: "Luis R. Rodriguez" Cc: William Breathitt Gray Cc: Thomas Gleixner Cc: Kate Stewart Cc: Philippe Ombredanne Signed-off-by: Greg Kroah-Hartman