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| author | Linus Walleij <linus.walleij@linaro.org> | 2018-02-20 10:28:59 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2018-02-20 10:42:17 +0300 |
| commit | 40275dc4edb49d7ed543eb847f618dc12e5a024c (patch) | |
| tree | afecf3102f03967ce4c4166fe6b16a2b33deb22a | |
| parent | 1aecabb5b2d1dc1a821cdecda607eb70a8dd5124 (diff) | |
| download | linux-40275dc4edb49d7ed543eb847f618dc12e5a024c.tar.xz | |
drm: simple_kms_helper: Add mode_valid() callback support
The PL111 needs to filter valid modes based on memory bandwidth.
I guess it is a pretty simple operation, so we can still claim
the DRM KMS helper pipeline is simple after adding this (optional)
vtable callback.
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180220072859.3386-1-linus.walleij@linaro.org
| -rw-r--r-- | drivers/gpu/drm/drm_simple_kms_helper.c | 15 | ||||
| -rw-r--r-- | include/drm/drm_simple_kms_helper.h | 14 |
2 files changed, 29 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_simple_kms_helper.c b/drivers/gpu/drm/drm_simple_kms_helper.c index 9d3f6b70812c..6c327fdbaaee 100644 --- a/drivers/gpu/drm/drm_simple_kms_helper.c +++ b/drivers/gpu/drm/drm_simple_kms_helper.c @@ -34,6 +34,20 @@ static const struct drm_encoder_funcs drm_simple_kms_encoder_funcs = { .destroy = drm_encoder_cleanup, }; +static enum drm_mode_status +drm_simple_kms_crtc_mode_valid(struct drm_crtc *crtc, + const struct drm_display_mode *mode) +{ + struct drm_simple_display_pipe *pipe; + + pipe = container_of(crtc, struct drm_simple_display_pipe, crtc); + if (!pipe->funcs || !pipe->funcs->mode_valid) + /* Anything goes */ + return MODE_OK; + + return pipe->funcs->mode_valid(crtc, mode); +} + static int drm_simple_kms_crtc_check(struct drm_crtc *crtc, struct drm_crtc_state *state) { @@ -72,6 +86,7 @@ static void drm_simple_kms_crtc_disable(struct drm_crtc *crtc, } static const struct drm_crtc_helper_funcs drm_simple_kms_crtc_helper_funcs = { + .mode_valid = drm_simple_kms_crtc_mode_valid, .atomic_check = drm_simple_kms_crtc_check, .atomic_enable = drm_simple_kms_crtc_enable, .atomic_disable = drm_simple_kms_crtc_disable, diff --git a/include/drm/drm_simple_kms_helper.h b/include/drm/drm_simple_kms_helper.h index 6d9adbb46293..d9e4c3c3f009 100644 --- a/include/drm/drm_simple_kms_helper.h +++ b/include/drm/drm_simple_kms_helper.h @@ -22,6 +22,20 @@ struct drm_simple_display_pipe; */ struct drm_simple_display_pipe_funcs { /** + * @mode_valid: + * + * This function is called to filter out valid modes from the + * suggestions suggested by the bridge or display. This optional + * hook is passed in when initializing the pipeline. + * + * RETURNS: + * + * drm_mode_status Enum + */ + enum drm_mode_status (*mode_valid)(struct drm_crtc *crtc, + const struct drm_display_mode *mode); + + /** * @enable: * * This function should be used to enable the pipeline. |