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drm/i915: copy&paste drm_crtc_helper_set_config
And the following static functions required by it: drm_encoder_crtc_ok, drm_crtc_helper_disable No changes safe for the s/drm/intel prefix change. Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter
parent
61b77ddda6
commit
50f56119ef
@ -6590,12 +6590,324 @@ static struct drm_crtc_helper_funcs intel_helper_funcs = {
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.disable = intel_crtc_disable,
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};
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static bool intel_encoder_crtc_ok(struct drm_encoder *encoder,
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struct drm_crtc *crtc)
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{
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struct drm_device *dev;
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struct drm_crtc *tmp;
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int crtc_mask = 1;
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WARN(!crtc, "checking null crtc?\n");
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dev = crtc->dev;
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list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
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if (tmp == crtc)
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break;
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crtc_mask <<= 1;
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}
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if (encoder->possible_crtcs & crtc_mask)
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return true;
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return false;
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}
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static int
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intel_crtc_helper_disable(struct drm_crtc *crtc)
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{
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struct drm_device *dev = crtc->dev;
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struct drm_connector *connector;
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struct drm_encoder *encoder;
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/* Decouple all encoders and their attached connectors from this crtc */
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list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
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if (encoder->crtc != crtc)
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continue;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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if (connector->encoder != encoder)
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continue;
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connector->encoder = NULL;
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}
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}
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drm_helper_disable_unused_functions(dev);
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return 0;
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}
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static int intel_crtc_set_config(struct drm_mode_set *set)
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{
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struct drm_device *dev;
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struct drm_crtc *save_crtcs, *new_crtc, *crtc;
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struct drm_encoder *save_encoders, *new_encoder, *encoder;
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struct drm_framebuffer *old_fb = NULL;
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bool mode_changed = false; /* if true do a full mode set */
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bool fb_changed = false; /* if true and !mode_changed just do a flip */
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struct drm_connector *save_connectors, *connector;
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int count = 0, ro, fail = 0;
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struct drm_crtc_helper_funcs *crtc_funcs;
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struct drm_mode_set save_set;
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int ret;
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int i;
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DRM_DEBUG_KMS("\n");
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if (!set)
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return -EINVAL;
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if (!set->crtc)
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return -EINVAL;
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if (!set->crtc->helper_private)
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return -EINVAL;
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crtc_funcs = set->crtc->helper_private;
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if (!set->mode)
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set->fb = NULL;
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if (set->fb) {
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DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
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set->crtc->base.id, set->fb->base.id,
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(int)set->num_connectors, set->x, set->y);
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} else {
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DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
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return intel_crtc_helper_disable(set->crtc);
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}
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dev = set->crtc->dev;
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/* Allocate space for the backup of all (non-pointer) crtc, encoder and
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* connector data. */
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save_crtcs = kzalloc(dev->mode_config.num_crtc *
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sizeof(struct drm_crtc), GFP_KERNEL);
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if (!save_crtcs)
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return -ENOMEM;
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save_encoders = kzalloc(dev->mode_config.num_encoder *
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sizeof(struct drm_encoder), GFP_KERNEL);
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if (!save_encoders) {
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kfree(save_crtcs);
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return -ENOMEM;
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}
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save_connectors = kzalloc(dev->mode_config.num_connector *
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sizeof(struct drm_connector), GFP_KERNEL);
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if (!save_connectors) {
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kfree(save_crtcs);
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kfree(save_encoders);
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return -ENOMEM;
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}
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/* Copy data. Note that driver private data is not affected.
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* Should anything bad happen only the expected state is
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* restored, not the drivers personal bookkeeping.
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*/
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count = 0;
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list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
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save_crtcs[count++] = *crtc;
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}
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count = 0;
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list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
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save_encoders[count++] = *encoder;
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}
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count = 0;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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save_connectors[count++] = *connector;
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}
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save_set.crtc = set->crtc;
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save_set.mode = &set->crtc->mode;
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save_set.x = set->crtc->x;
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save_set.y = set->crtc->y;
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save_set.fb = set->crtc->fb;
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/* We should be able to check here if the fb has the same properties
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* and then just flip_or_move it */
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if (set->crtc->fb != set->fb) {
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/* If we have no fb then treat it as a full mode set */
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if (set->crtc->fb == NULL) {
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DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
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mode_changed = true;
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} else if (set->fb == NULL) {
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mode_changed = true;
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} else if (set->fb->depth != set->crtc->fb->depth) {
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mode_changed = true;
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} else if (set->fb->bits_per_pixel !=
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set->crtc->fb->bits_per_pixel) {
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mode_changed = true;
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} else
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fb_changed = true;
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}
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if (set->x != set->crtc->x || set->y != set->crtc->y)
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fb_changed = true;
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if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
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DRM_DEBUG_KMS("modes are different, full mode set\n");
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drm_mode_debug_printmodeline(&set->crtc->mode);
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drm_mode_debug_printmodeline(set->mode);
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mode_changed = true;
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}
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/* a) traverse passed in connector list and get encoders for them */
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count = 0;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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struct drm_connector_helper_funcs *connector_funcs =
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connector->helper_private;
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new_encoder = connector->encoder;
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for (ro = 0; ro < set->num_connectors; ro++) {
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if (set->connectors[ro] == connector) {
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new_encoder = connector_funcs->best_encoder(connector);
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/* if we can't get an encoder for a connector
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we are setting now - then fail */
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if (new_encoder == NULL)
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/* don't break so fail path works correct */
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fail = 1;
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break;
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}
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}
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if (new_encoder != connector->encoder) {
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DRM_DEBUG_KMS("encoder changed, full mode switch\n");
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mode_changed = true;
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/* If the encoder is reused for another connector, then
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* the appropriate crtc will be set later.
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*/
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if (connector->encoder)
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connector->encoder->crtc = NULL;
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connector->encoder = new_encoder;
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}
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}
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if (fail) {
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ret = -EINVAL;
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goto fail;
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}
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count = 0;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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if (!connector->encoder)
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continue;
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if (connector->encoder->crtc == set->crtc)
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new_crtc = NULL;
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else
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new_crtc = connector->encoder->crtc;
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for (ro = 0; ro < set->num_connectors; ro++) {
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if (set->connectors[ro] == connector)
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new_crtc = set->crtc;
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}
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/* Make sure the new CRTC will work with the encoder */
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if (new_crtc &&
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!intel_encoder_crtc_ok(connector->encoder, new_crtc)) {
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ret = -EINVAL;
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goto fail;
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}
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if (new_crtc != connector->encoder->crtc) {
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DRM_DEBUG_KMS("crtc changed, full mode switch\n");
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mode_changed = true;
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connector->encoder->crtc = new_crtc;
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}
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if (new_crtc) {
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DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
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connector->base.id, drm_get_connector_name(connector),
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new_crtc->base.id);
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} else {
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DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
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connector->base.id, drm_get_connector_name(connector));
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}
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}
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/* mode_set_base is not a required function */
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if (fb_changed && !crtc_funcs->mode_set_base)
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mode_changed = true;
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if (mode_changed) {
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set->crtc->enabled = drm_helper_crtc_in_use(set->crtc);
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if (set->crtc->enabled) {
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DRM_DEBUG_KMS("attempting to set mode from"
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" userspace\n");
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drm_mode_debug_printmodeline(set->mode);
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old_fb = set->crtc->fb;
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set->crtc->fb = set->fb;
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if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
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set->x, set->y,
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old_fb)) {
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DRM_ERROR("failed to set mode on [CRTC:%d]\n",
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set->crtc->base.id);
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set->crtc->fb = old_fb;
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ret = -EINVAL;
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goto fail;
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}
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DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
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for (i = 0; i < set->num_connectors; i++) {
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DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
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drm_get_connector_name(set->connectors[i]));
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set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON);
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}
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}
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drm_helper_disable_unused_functions(dev);
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} else if (fb_changed) {
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set->crtc->x = set->x;
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set->crtc->y = set->y;
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old_fb = set->crtc->fb;
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if (set->crtc->fb != set->fb)
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set->crtc->fb = set->fb;
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ret = crtc_funcs->mode_set_base(set->crtc,
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set->x, set->y, old_fb);
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if (ret != 0) {
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set->crtc->fb = old_fb;
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goto fail;
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}
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}
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kfree(save_connectors);
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kfree(save_encoders);
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kfree(save_crtcs);
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return 0;
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fail:
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/* Restore all previous data. */
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count = 0;
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list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
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*crtc = save_crtcs[count++];
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}
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count = 0;
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list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
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*encoder = save_encoders[count++];
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}
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count = 0;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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*connector = save_connectors[count++];
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}
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/* Try to restore the config */
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if (mode_changed &&
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!drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x,
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save_set.y, save_set.fb))
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DRM_ERROR("failed to restore config after modeset failure\n");
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kfree(save_connectors);
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kfree(save_encoders);
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kfree(save_crtcs);
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return ret;
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}
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static const struct drm_crtc_funcs intel_crtc_funcs = {
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.reset = intel_crtc_reset,
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.cursor_set = intel_crtc_cursor_set,
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.cursor_move = intel_crtc_cursor_move,
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.gamma_set = intel_crtc_gamma_set,
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.set_config = drm_crtc_helper_set_config,
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.set_config = intel_crtc_set_config,
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.destroy = intel_crtc_destroy,
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.page_flip = intel_crtc_page_flip,
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};
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