diff options
Diffstat (limited to 'drivers/gpu/drm/drm_crtc_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc_helper.c | 128 |
1 files changed, 107 insertions, 21 deletions
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index a04639dc633..a6f73f1e99d 100644 --- a/drivers/gpu/drm/drm_crtc_helper.c +++ b/drivers/gpu/drm/drm_crtc_helper.c @@ -199,6 +199,29 @@ static void drm_helper_add_std_modes(struct drm_device *dev, } /** + * drm_helper_encoder_in_use - check if a given encoder is in use + * @encoder: encoder to check + * + * LOCKING: + * Caller must hold mode config lock. + * + * Walk @encoders's DRM device's mode_config and see if it's in use. + * + * RETURNS: + * True if @encoder is part of the mode_config, false otherwise. + */ +bool drm_helper_encoder_in_use(struct drm_encoder *encoder) +{ + struct drm_connector *connector; + struct drm_device *dev = encoder->dev; + list_for_each_entry(connector, &dev->mode_config.connector_list, head) + if (connector->encoder == encoder) + return true; + return false; +} +EXPORT_SYMBOL(drm_helper_encoder_in_use); + +/** * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config * @crtc: CRTC to check * @@ -216,7 +239,7 @@ bool drm_helper_crtc_in_use(struct drm_crtc *crtc) struct drm_device *dev = crtc->dev; /* FIXME: Locking around list access? */ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) - if (encoder->crtc == crtc) + if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) return true; return false; } @@ -240,7 +263,7 @@ void drm_helper_disable_unused_functions(struct drm_device *dev) list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { encoder_funcs = encoder->helper_private; - if (!encoder->crtc) + if (!drm_helper_encoder_in_use(encoder)) (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); } @@ -561,7 +584,6 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, int saved_x, saved_y; struct drm_encoder *encoder; bool ret = true; - bool depth_changed, bpp_changed; adjusted_mode = drm_mode_duplicate(dev, mode); @@ -570,15 +592,6 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, if (!crtc->enabled) return true; - if (old_fb && crtc->fb) { - depth_changed = (old_fb->depth != crtc->fb->depth); - bpp_changed = (old_fb->bits_per_pixel != - crtc->fb->bits_per_pixel); - } else { - depth_changed = true; - bpp_changed = true; - } - saved_mode = crtc->mode; saved_x = crtc->x; saved_y = crtc->y; @@ -590,15 +603,6 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, crtc->x = x; crtc->y = y; - if (drm_mode_equal(&saved_mode, &crtc->mode)) { - if (saved_x != crtc->x || saved_y != crtc->y || - depth_changed || bpp_changed) { - ret = !crtc_funcs->mode_set_base(crtc, crtc->x, crtc->y, - old_fb); - goto done; - } - } - /* Pass our mode to the connectors and the CRTC to give them a chance to * adjust it according to limitations or connector properties, and also * a chance to reject the mode entirely. @@ -954,6 +958,88 @@ bool drm_helper_initial_config(struct drm_device *dev) } EXPORT_SYMBOL(drm_helper_initial_config); +static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) +{ + int dpms = DRM_MODE_DPMS_OFF; + struct drm_connector *connector; + struct drm_device *dev = encoder->dev; + + list_for_each_entry(connector, &dev->mode_config.connector_list, head) + if (connector->encoder == encoder) + if (connector->dpms < dpms) + dpms = connector->dpms; + return dpms; +} + +static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) +{ + int dpms = DRM_MODE_DPMS_OFF; + struct drm_connector *connector; + struct drm_device *dev = crtc->dev; + + list_for_each_entry(connector, &dev->mode_config.connector_list, head) + if (connector->encoder && connector->encoder->crtc == crtc) + if (connector->dpms < dpms) + dpms = connector->dpms; + return dpms; +} + +/** + * drm_helper_connector_dpms + * @connector affected connector + * @mode DPMS mode + * + * Calls the low-level connector DPMS function, then + * calls appropriate encoder and crtc DPMS functions as well + */ +void drm_helper_connector_dpms(struct drm_connector *connector, int mode) +{ + struct drm_encoder *encoder = connector->encoder; + struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; + int old_dpms; + + if (mode == connector->dpms) + return; + + old_dpms = connector->dpms; + connector->dpms = mode; + + /* from off to on, do crtc then encoder */ + if (mode < old_dpms) { + if (crtc) { + struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; + if (crtc_funcs->dpms) + (*crtc_funcs->dpms) (crtc, + drm_helper_choose_crtc_dpms(crtc)); + } + if (encoder) { + struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; + if (encoder_funcs->dpms) + (*encoder_funcs->dpms) (encoder, + drm_helper_choose_encoder_dpms(encoder)); + } + } + + /* from on to off, do encoder then crtc */ + if (mode > old_dpms) { + if (encoder) { + struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; + if (encoder_funcs->dpms) + (*encoder_funcs->dpms) (encoder, + drm_helper_choose_encoder_dpms(encoder)); + } + if (crtc) { + struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; + if (crtc_funcs->dpms) + (*crtc_funcs->dpms) (crtc, + drm_helper_choose_crtc_dpms(crtc)); + } + } + + return; +} +EXPORT_SYMBOL(drm_helper_connector_dpms); + /** * drm_hotplug_stage_two * @dev DRM device |