kernel/linux.git/drivers/gpu/drm/vc4/vc4_debugfs.c, branch v6.19.11

drm: include drm_print.h where needed

2025-10-31T08:34:52+00:00

There are a gazillion files that depend on drm_print.h being indirectly included via drm_buddy.h, drm_mm.h, or ttm/ttm_resource.h. In preparation for removing those includes, explicitly include drm_print.h where needed. Cc: Thomas Zimmermann Reviewed-by: Thomas Zimmermann Signed-off-by: Jani Nikula Link: https://lore.kernel.org/r/5fe67395907be33eb5199ea6d540e29fddee71c8.1761734313.git.jani.nikula@intel.com

drm/vc4: use new debugfs device-centered functions

2022-12-22T17:59:16+00:00

Currently, vc4 has its own debugfs infrastructure that adds the debugfs files on drm_dev_register(). With the introduction of the new debugfs, functions, replace the vc4 debugfs structure with the DRM debugfs device-centered function, drm_debugfs_add_file(). Moreover, remove the explicit error handling of debugfs related functions, considering that the only failure mode is -ENOMEM and also that error handling is not recommended for debugfs functions, as pointed out in [1]. [1] https://lore.kernel.org/all/YWAmZdRwnAt6wh9B@kroah.com/ Signed-off-by: Maíra Canal Reviewed-by: Maxime Ripard Reviewed-by: Melissa Wen Acked-by: Daniel Vetter Signed-off-by: Maíra Canal Link: https://patchwork.freedesktop.org/patch/msgid/20221219120621.15086-5-mcanal@igalia.com

drm/vc4: debugfs: Simplify debugfs registration

2022-07-13T08:46:13+00:00

The vc4 has a custom API to allow components to register a debugfs file before the DRM driver has been registered and the debugfs_init hook has been called. However, the .late_register hook allows to have the debugfs file creation deferred after that time already. Let's remove our custom code to only register later our debugfs entries as part of either debugfs_init or after it. Acked-by: Thomas Zimmermann Signed-off-by: Maxime Ripard Link: https://lore.kernel.org/r/20220711173939.1132294-65-maxime@cerno.tech

drm/vc4: debugfs: Return an error on failure

2022-07-13T08:46:12+00:00

vc4_debugfs_add_file() can fail, so let's propagate its error code instead of silencing it. Acked-by: Thomas Zimmermann Signed-off-by: Maxime Ripard Link: https://lore.kernel.org/r/20220711173939.1132294-64-maxime@cerno.tech

drm/vc4: debugfs: Protect device resources

2022-07-13T08:46:12+00:00

Our current code now mixes some resources whose lifetime are tied to the device (clocks, IO mappings, etc.) and some that are tied to the DRM device (encoder, bridge). The device one will be freed at unbind time, but the DRM one will only be freed when the last user of the DRM device closes its file handle. So we end up with a time window during which we can call the encoder hooks, but we don't have access to the underlying resources and device. Let's protect all those sections with drm_dev_enter() and drm_dev_exit() so that we bail out if we are during that window. Acked-by: Thomas Zimmermann Signed-off-by: Maxime Ripard Link: https://lore.kernel.org/r/20220711173939.1132294-63-maxime@cerno.tech

drm/vc4: Leverage the load tracker on the BCM2711

2021-11-04T09:36:25+00:00

The load tracker was initially designed to report and warn about a load too high for the HVS. To do so, it computes for each plane the impact it's going to have on the HVS, and will warn (if it's enabled) if we go over what the hardware can process. While the limits being used are a bit irrelevant to the BCM2711, the algorithm to compute the HVS load will be one component used in order to compute the core clock rate on the BCM2711. Let's remove the hooks to prevent the load tracker to do its computation, but since we don't have the same limits, don't check them against them, and prevent the debugfs file to enable it from being created. Signed-off-by: Maxime Ripard Reviewed-by: Dave Stevenson Link: https://lore.kernel.org/r/20211025152903.1088803-8-maxime@cerno.tech

drm/vc4/vc4_debugfs: Demote non-conformant kernel-doc headers

2020-11-18T10:51:58+00:00

Fixes the following W=1 kernel build warning(s): drivers/gpu/drm/vc4/vc4_debugfs.c:25: warning: Function parameter or member 'minor' not described in 'vc4_debugfs_init' drivers/gpu/drm/vc4/vc4_debugfs.c:62: warning: Function parameter or member 'dev' not described in 'vc4_debugfs_add_file' drivers/gpu/drm/vc4/vc4_debugfs.c:62: warning: Function parameter or member 'name' not described in 'vc4_debugfs_add_file' drivers/gpu/drm/vc4/vc4_debugfs.c:62: warning: Function parameter or member 'show' not described in 'vc4_debugfs_add_file' drivers/gpu/drm/vc4/vc4_debugfs.c:62: warning: Function parameter or member 'data' not described in 'vc4_debugfs_add_file' Cc: Eric Anholt Cc: Maxime Ripard Cc: David Airlie Cc: Daniel Vetter Cc: dri-devel@lists.freedesktop.org Signed-off-by: Lee Jones Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20201116174112.1833368-41-lee.jones@linaro.org

drm: convert .debugfs_init() hook to return void.

2020-03-18T16:53:28+00:00

As a result of commit 987d65d01356 (drm: debugfs: make drm_debugfs_create_files() never fail) and changes to various debugfs functions in drm/core and across various drivers, there is no need for the drm_driver.debugfs_init() hook to have a return value. Therefore, declare it as void. This also includes refactoring all users of the .debugfs_init() hook to return void across the subsystem. v2: include changes to the hook and drivers that use it in one patch to prevent driver breakage and enable individual successful compilation of this change. References: https://lists.freedesktop.org/archives/dri-devel/2020-February/257183.html Signed-off-by: Wambui Karuga Reviewed-by: Greg Kroah-Hartman Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20200310133121.27913-18-wambui.karugax@gmail.com

drm/vc4: remove check of return value of drm_debugfs functions

2020-03-18T15:22:20+00:00

Since 987d65d01356 (drm: debugfs: make drm_debugfs_create_files() never fail), drm_debugfs_create_files() never fails and should return void. Therefore, remove unnecessary check and error handling for the return value of drm_debugfs_create_files() in vc4_debugfs_init(). v2: remove conversion of vc4_debugfs_init() to void to enable individual compilation and avoid build issues and breakage. References: https://lists.freedesktop.org/archives/dri-devel/2020-February/257183.html Signed-off-by: Wambui Karuga Reviewed-by: Greg Kroah-Hartman Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20200310133121.27913-5-wambui.karugax@gmail.com

Merge v5.3-rc1 into drm-misc-next

2019-07-22T19:24:10+00:00

Noralf needs some SPI patches in 5.3 to merge some work on tinydrm. Signed-off-by: Maxime Ripard