[PATCH 26/81] drm/i915: copy&paste drm_crtc_helper_set_config

Daniel Vetter
2012-07-11T15:35:42Z

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.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
drivers/gpu/drm/i915/intel_display.c | 314 +++++++++++++++++++++++++++++++++-
1 files changed, 313 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 5317f35..7edb3a1 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6590,12 +6590,324 @@ static struct drm_crtc_helper_funcs intel_helper_funcs = {
.disable = intel_crtc_disable,
};

+static bool intel_encoder_crtc_ok(struct drm_encoder *encoder,
+ struct drm_crtc *crtc)
+{
+ struct drm_device *dev;
+ struct drm_crtc *tmp;
+ int crtc_mask = 1;
+
+ WARN(!crtc, "checking null crtc?\n");
+
+ dev = crtc->dev;
+
+ list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
+ if (tmp == crtc)
+ break;
+ crtc_mask <<= 1;
+ }
+
+ if (encoder->possible_crtcs & crtc_mask)
+ return true;
+ return false;
+}
+
+static int
+intel_crtc_helper_disable(struct drm_crtc *crtc)
+{
+ struct drm_device *dev = crtc->dev;
+ struct drm_connector *connector;
+ struct drm_encoder *encoder;
+
+ /* Decouple all encoders and their attached connectors from this crtc */
+ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+ if (encoder->crtc != crtc)
+ continue;
+
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ if (connector->encoder != encoder)
+ continue;
+
+ connector->encoder = NULL;
+ }
+ }
+
+ drm_helper_disable_unused_functions(dev);
+ return 0;
+}
+
+static int intel_crtc_set_config(struct drm_mode_set *set)
+{
+ struct drm_device *dev;
+ struct drm_crtc *save_crtcs, *new_crtc, *crtc;
+ struct drm_encoder *save_encoders, *new_encoder, *encoder;
+ struct drm_framebuffer *old_fb = NULL;
+ bool mode_changed = false; /* if true do a full mode set */
+ bool fb_changed = false; /* if true and !mode_changed just do a flip */
+ struct drm_connector *save_connectors, *connector;
+ int count = 0, ro, fail = 0;
+ struct drm_crtc_helper_funcs *crtc_funcs;
+ struct drm_mode_set save_set;
+ int ret;
+ int i;
+
+ DRM_DEBUG_KMS("\n");
+
+ if (!set)
+ return -EINVAL;
+
+ if (!set->crtc)
+ return -EINVAL;
+
+ if (!set->crtc->helper_private)
+ return -EINVAL;
+
+ crtc_funcs = set->crtc->helper_private;
+
+ if (!set->mode)
+ set->fb = NULL;
+
+ if (set->fb) {
+ DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
+ set->crtc->base.id, set->fb->base.id,
+ (int)set->num_connectors, set->x, set->y);
+ } else {
+ DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
+ return intel_crtc_helper_disable(set->crtc);
+ }
+
+ dev = set->crtc->dev;
+
+ /* Allocate space for the backup of all (non-pointer) crtc, encoder and
+ * connector data. */
+ save_crtcs = kzalloc(dev->mode_config.num_crtc *
+ sizeof(struct drm_crtc), GFP_KERNEL);
+ if (!save_crtcs)
+ return -ENOMEM;
+
+ save_encoders = kzalloc(dev->mode_config.num_encoder *
+ sizeof(struct drm_encoder), GFP_KERNEL);
+ if (!save_encoders) {
+ kfree(save_crtcs);
+ return -ENOMEM;
+ }
+
+ save_connectors = kzalloc(dev->mode_config.num_connector *
+ sizeof(struct drm_connector), GFP_KERNEL);
+ if (!save_connectors) {
+ kfree(save_crtcs);
+ kfree(save_encoders);
+ return -ENOMEM;
+ }
+
+ /* Copy data. Note that driver private data is not affected.
+ * Should anything bad happen only the expected state is
+ * restored, not the drivers personal bookkeeping.
+ */
+ count = 0;
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+ save_crtcs[count++] = *crtc;
+ }
+
+ count = 0;
+ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+ save_encoders[count++] = *encoder;
+ }
+
+ count = 0;
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ save_connectors[count++] = *connector;
+ }
+
+ save_set.crtc = set->crtc;
+ save_set.mode = &set->crtc->mode;
+ save_set.x = set->crtc->x;
+ save_set.y = set->crtc->y;
+ save_set.fb = set->crtc->fb;
+
+ /* We should be able to check here if the fb has the same properties
+ * and then just flip_or_move it */
+ if (set->crtc->fb != set->fb) {
+ /* If we have no fb then treat it as a full mode set */
+ if (set->crtc->fb == NULL) {
+ DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
+ mode_changed = true;
+ } else if (set->fb == NULL) {
+ mode_changed = true;
+ } else if (set->fb->depth != set->crtc->fb->depth) {
+ mode_changed = true;
+ } else if (set->fb->bits_per_pixel !=
+ set->crtc->fb->bits_per_pixel) {
+ mode_changed = true;
+ } else
+ fb_changed = true;
+ }
+
+ if (set->x != set->crtc->x || set->y != set->crtc->y)
+ fb_changed = true;
+
+ if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
+ DRM_DEBUG_KMS("modes are different, full mode set\n");
+ drm_mode_debug_printmodeline(&set->crtc->mode);
+ drm_mode_debug_printmodeline(set->mode);
+ mode_changed = true;
+ }
+
+ /* a) traverse passed in connector list and get encoders for them */
+ count = 0;
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ struct drm_connector_helper_funcs *connector_funcs =
+ connector->helper_private;
+ new_encoder = connector->encoder;
+ for (ro = 0; ro < set->num_connectors; ro++) {
+ if (set->connectors[ro] == connector) {
+ new_encoder = connector_funcs->best_encoder(connector);
+ /* if we can't get an encoder for a connector
+ we are setting now - then fail */
+ if (new_encoder == NULL)
+ /* don't break so fail path works correct */
+ fail = 1;
+ break;
+ }
+ }
+
+ if (new_encoder != connector->encoder) {
+ DRM_DEBUG_KMS("encoder changed, full mode switch\n");
+ mode_changed = true;
+ /* If the encoder is reused for another connector, then
+ * the appropriate crtc will be set later.
+ */
+ if (connector->encoder)
+ connector->encoder->crtc = NULL;
+ connector->encoder = new_encoder;
+ }
+ }
+
+ if (fail) {
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ count = 0;
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ if (!connector->encoder)
+ continue;
+
+ if (connector->encoder->crtc == set->crtc)
+ new_crtc = NULL;
+ else
+ new_crtc = connector->encoder->crtc;
+
+ for (ro = 0; ro < set->num_connectors; ro++) {
+ if (set->connectors[ro] == connector)
+ new_crtc = set->crtc;
+ }
+
+ /* Make sure the new CRTC will work with the encoder */
+ if (new_crtc &&
+ !intel_encoder_crtc_ok(connector->encoder, new_crtc)) {
+ ret = -EINVAL;
+ goto fail;
+ }
+ if (new_crtc != connector->encoder->crtc) {
+ DRM_DEBUG_KMS("crtc changed, full mode switch\n");
+ mode_changed = true;
+ connector->encoder->crtc = new_crtc;
+ }
+ if (new_crtc) {
+ DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
+ connector->base.id, drm_get_connector_name(connector),
+ new_crtc->base.id);
+ } else {
+ DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
+ connector->base.id, drm_get_connector_name(connector));
+ }
+ }
+
+ /* mode_set_base is not a required function */
+ if (fb_changed && !crtc_funcs->mode_set_base)
+ mode_changed = true;
+
+ if (mode_changed) {
+ set->crtc->enabled = drm_helper_crtc_in_use(set->crtc);
+ if (set->crtc->enabled) {
+ DRM_DEBUG_KMS("attempting to set mode from"
+ " userspace\n");
+ drm_mode_debug_printmodeline(set->mode);
+ old_fb = set->crtc->fb;
+ set->crtc->fb = set->fb;
+ if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
+ set->x, set->y,
+ old_fb)) {
+ DRM_ERROR("failed to set mode on [CRTC:%d]\n",
+ set->crtc->base.id);
+ set->crtc->fb = old_fb;
+ ret = -EINVAL;
+ goto fail;
+ }
+ DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
+ for (i = 0; i < set->num_connectors; i++) {
+ DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
+ drm_get_connector_name(set->connectors[i]));
+ set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON);
+ }
+ }
+ drm_helper_disable_unused_functions(dev);
+ } else if (fb_changed) {
+ set->crtc->x = set->x;
+ set->crtc->y = set->y;
+
+ old_fb = set->crtc->fb;
+ if (set->crtc->fb != set->fb)
+ set->crtc->fb = set->fb;
+ ret = crtc_funcs->mode_set_base(set->crtc,
+ set->x, set->y, old_fb);
+ if (ret != 0) {
+ set->crtc->fb = old_fb;
+ goto fail;
+ }
+ }
+
+ kfree(save_connectors);
+ kfree(save_encoders);
+ kfree(save_crtcs);
+ return 0;
+
+fail:
+ /* Restore all previous data. */
+ count = 0;
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+ *crtc = save_crtcs[count++];
+ }
+
+ count = 0;
+ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+ *encoder = save_encoders[count++];
+ }
+
+ count = 0;
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ *connector = save_connectors[count++];
+ }
+
+ /* Try to restore the config */
+ if (mode_changed &&
+ !drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x,
+ save_set.y, save_set.fb))
+ DRM_ERROR("failed to restore config after modeset failure\n");
+
+ kfree(save_connectors);
+ kfree(save_encoders);
+ kfree(save_crtcs);
+ return ret;
+}
+
static const struct drm_crtc_funcs intel_crtc_funcs = {
.reset = intel_crtc_reset,
.cursor_set = intel_crtc_cursor_set,
.cursor_move = intel_crtc_cursor_move,
.gamma_set = intel_crtc_gamma_set,
- .set_config = drm_crtc_helper_set_config,
+ .set_config = intel_crtc_set_config,
.destroy = intel_crtc_destroy,
.page_flip = intel_crtc_page_flip,
};
--
1.7.7.6