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| author | Sam Ravnborg <sam@ravnborg.org> | 2019-12-07 17:03:29 +0300 |
|---|---|---|
| committer | Sam Ravnborg <sam@ravnborg.org> | 2019-12-10 00:57:26 +0300 |
| commit | 5dce87a91970bf7c7ef3de5e2bff08b695d858a3 (patch) | |
| tree | fabf03a65d13058b7525a12f80be8771d2d171db /drivers | |
| parent | 4286dc07e6ae56ed33e9067850d6c04ff062195f (diff) | |
| download | linux-5dce87a91970bf7c7ef3de5e2bff08b695d858a3.tar.xz | |
drm/drm_panel: no error when no callback
The callbacks in drm_panel_funcs are optional, so do not
return an error just because no callback is assigned.
v2:
- Document what functions in drm_panel_funcs are optional (Laurent)
- Return -EOPNOTSUPP if get_modes() is not assigned (Laurent)
(Sam: -EOPNOTSUPP seems to best error code in this situation)
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20191207140353.23967-2-sam@ravnborg.org
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/drm_panel.c | 35 |
1 files changed, 25 insertions, 10 deletions
diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c index ed7985c0535a..4ab7229fb22b 100644 --- a/drivers/gpu/drm/drm_panel.c +++ b/drivers/gpu/drm/drm_panel.c @@ -151,10 +151,13 @@ EXPORT_SYMBOL(drm_panel_detach); */ int drm_panel_prepare(struct drm_panel *panel) { - if (panel && panel->funcs && panel->funcs->prepare) + if (!panel) + return -EINVAL; + + if (panel->funcs && panel->funcs->prepare) return panel->funcs->prepare(panel); - return panel ? -ENOSYS : -EINVAL; + return 0; } EXPORT_SYMBOL(drm_panel_prepare); @@ -171,10 +174,13 @@ EXPORT_SYMBOL(drm_panel_prepare); */ int drm_panel_unprepare(struct drm_panel *panel) { - if (panel && panel->funcs && panel->funcs->unprepare) + if (!panel) + return -EINVAL; + + if (panel->funcs && panel->funcs->unprepare) return panel->funcs->unprepare(panel); - return panel ? -ENOSYS : -EINVAL; + return 0; } EXPORT_SYMBOL(drm_panel_unprepare); @@ -190,10 +196,13 @@ EXPORT_SYMBOL(drm_panel_unprepare); */ int drm_panel_enable(struct drm_panel *panel) { - if (panel && panel->funcs && panel->funcs->enable) + if (!panel) + return -EINVAL; + + if (panel->funcs && panel->funcs->enable) return panel->funcs->enable(panel); - return panel ? -ENOSYS : -EINVAL; + return 0; } EXPORT_SYMBOL(drm_panel_enable); @@ -209,10 +218,13 @@ EXPORT_SYMBOL(drm_panel_enable); */ int drm_panel_disable(struct drm_panel *panel) { - if (panel && panel->funcs && panel->funcs->disable) + if (!panel) + return -EINVAL; + + if (panel->funcs && panel->funcs->disable) return panel->funcs->disable(panel); - return panel ? -ENOSYS : -EINVAL; + return 0; } EXPORT_SYMBOL(drm_panel_disable); @@ -228,10 +240,13 @@ EXPORT_SYMBOL(drm_panel_disable); */ int drm_panel_get_modes(struct drm_panel *panel) { - if (panel && panel->funcs && panel->funcs->get_modes) + if (!panel) + return -EINVAL; + + if (panel->funcs && panel->funcs->get_modes) return panel->funcs->get_modes(panel); - return panel ? -ENOSYS : -EINVAL; + return -EOPNOTSUPP; } EXPORT_SYMBOL(drm_panel_get_modes); |