diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2022-09-05 17:16:46 +0300 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2022-09-12 10:14:26 +0300 |
| commit | 216b9bbaeaea96b7f05c220f61855d174be972d8 (patch) | |
| tree | 89e0c2bc96f351183fcff9fabab3b7ea442bfc25 /drivers/gpu/drm/drm_probe_helper.c | |
| parent | d25654b3fad9906ca80912701fd4bd6e2419f54d (diff) | |
| download | linux-216b9bbaeaea96b7f05c220f61855d174be972d8.tar.xz | |
drm/probe-helper: Add drm_crtc_helper_mode_valid_fixed()
Add drm_crtc_helper_mode_valid_fixed(), which validates a given mode
against a display hardware's mode. Convert simpledrm and use it in a
few other drivers with static modes.
v4:
* remove empty line after opening brace
v2:
* rename 'static' and 'hw' to 'fixed' everywhere
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220905141648.22013-3-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm/drm_probe_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_probe_helper.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c index 818150a1b3b0..69b0b2b9cc1c 100644 --- a/drivers/gpu/drm/drm_probe_helper.c +++ b/drivers/gpu/drm/drm_probe_helper.c @@ -1015,6 +1015,30 @@ bool drm_helper_hpd_irq_event(struct drm_device *dev) EXPORT_SYMBOL(drm_helper_hpd_irq_event); /** + * drm_crtc_helper_mode_valid_fixed - Validates a display mode + * @crtc: the crtc + * @mode: the mode to validate + * @fixed_mode: the display hardware's mode + * + * Returns: + * MODE_OK on success, or another mode-status code otherwise. + */ +enum drm_mode_status drm_crtc_helper_mode_valid_fixed(struct drm_crtc *crtc, + const struct drm_display_mode *mode, + const struct drm_display_mode *fixed_mode) +{ + if (mode->hdisplay != fixed_mode->hdisplay && mode->vdisplay != fixed_mode->vdisplay) + return MODE_ONE_SIZE; + else if (mode->hdisplay != fixed_mode->hdisplay) + return MODE_ONE_WIDTH; + else if (mode->vdisplay != fixed_mode->vdisplay) + return MODE_ONE_HEIGHT; + + return MODE_OK; +} +EXPORT_SYMBOL(drm_crtc_helper_mode_valid_fixed); + +/** * drm_connector_helper_get_modes_from_ddc - Updates the connector's EDID * property from the connector's * DDC channel |