diff options
Diffstat (limited to 'drivers/gpu/drm/drm_probe_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_probe_helper.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c index bb427c5a4f1f..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 @@ -1051,6 +1075,46 @@ int drm_connector_helper_get_modes_from_ddc(struct drm_connector *connector) EXPORT_SYMBOL(drm_connector_helper_get_modes_from_ddc); /** + * drm_connector_helper_get_modes_fixed - Duplicates a display mode for a connector + * @connector: the connector + * @fixed_mode: the display hardware's mode + * + * This function duplicates a display modes for a connector. Drivers for hardware + * that only supports a single fixed mode can use this function in their connector's + * get_modes helper. + * + * Returns: + * The number of created modes. + */ +int drm_connector_helper_get_modes_fixed(struct drm_connector *connector, + const struct drm_display_mode *fixed_mode) +{ + struct drm_device *dev = connector->dev; + struct drm_display_mode *mode; + + mode = drm_mode_duplicate(dev, fixed_mode); + if (!mode) { + drm_err(dev, "Failed to duplicate mode " DRM_MODE_FMT "\n", + DRM_MODE_ARG(fixed_mode)); + return 0; + } + + if (mode->name[0] == '\0') + drm_mode_set_name(mode); + + mode->type |= DRM_MODE_TYPE_PREFERRED; + drm_mode_probed_add(connector, mode); + + if (mode->width_mm) + connector->display_info.width_mm = mode->width_mm; + if (mode->height_mm) + connector->display_info.height_mm = mode->height_mm; + + return 1; +} +EXPORT_SYMBOL(drm_connector_helper_get_modes_fixed); + +/** * drm_connector_helper_get_modes - Read EDID and update connector. * @connector: The connector * |