diff options
Diffstat (limited to 'drivers/gpu/drm/drm_crtc_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc_helper.c | 270 |
1 files changed, 213 insertions, 57 deletions
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index d8a982b71296..1c3a8c557140 100644 --- a/drivers/gpu/drm/drm_crtc_helper.c +++ b/drivers/gpu/drm/drm_crtc_helper.c @@ -36,7 +36,7 @@ /* * Detailed mode info for 800x600@60Hz */ -static struct drm_display_mode std_mode[] = { +static struct drm_display_mode std_modes[] = { { DRM_MODE("800x600", DRM_MODE_TYPE_DEFAULT, 40000, 800, 840, 968, 1056, 0, 600, 601, 605, 628, 0, DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, @@ -60,15 +60,18 @@ static struct drm_display_mode std_mode[] = { * changes have occurred. * * FIXME: take into account monitor limits + * + * RETURNS: + * Number of modes found on @connector. */ -void drm_helper_probe_single_connector_modes(struct drm_connector *connector, - uint32_t maxX, uint32_t maxY) +int drm_helper_probe_single_connector_modes(struct drm_connector *connector, + uint32_t maxX, uint32_t maxY) { struct drm_device *dev = connector->dev; struct drm_display_mode *mode, *t; struct drm_connector_helper_funcs *connector_funcs = connector->helper_private; - int ret; + int count = 0; DRM_DEBUG("%s\n", drm_get_connector_name(connector)); /* set all modes to the unverified state */ @@ -81,14 +84,14 @@ void drm_helper_probe_single_connector_modes(struct drm_connector *connector, DRM_DEBUG("%s is disconnected\n", drm_get_connector_name(connector)); /* TODO set EDID to NULL */ - return; + return 0; } - ret = (*connector_funcs->get_modes)(connector); + count = (*connector_funcs->get_modes)(connector); + if (!count) + return 0; - if (ret) { - drm_mode_connector_list_update(connector); - } + drm_mode_connector_list_update(connector); if (maxX && maxY) drm_mode_validate_size(dev, &connector->modes, maxX, @@ -102,25 +105,8 @@ void drm_helper_probe_single_connector_modes(struct drm_connector *connector, drm_mode_prune_invalid(dev, &connector->modes, true); - if (list_empty(&connector->modes)) { - struct drm_display_mode *stdmode; - - DRM_DEBUG("No valid modes on %s\n", - drm_get_connector_name(connector)); - - /* Should we do this here ??? - * When no valid EDID modes are available we end up - * here and bailed in the past, now we add a standard - * 640x480@60Hz mode and carry on. - */ - stdmode = drm_mode_duplicate(dev, &std_mode[0]); - drm_mode_probed_add(connector, stdmode); - drm_mode_list_concat(&connector->probed_modes, - &connector->modes); - - DRM_DEBUG("Adding standard 640x480 @ 60Hz to %s\n", - drm_get_connector_name(connector)); - } + if (list_empty(&connector->modes)) + return 0; drm_mode_sort(&connector->modes); @@ -131,20 +117,58 @@ void drm_helper_probe_single_connector_modes(struct drm_connector *connector, drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); drm_mode_debug_printmodeline(mode); } + + return count; } EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); -void drm_helper_probe_connector_modes(struct drm_device *dev, uint32_t maxX, +int drm_helper_probe_connector_modes(struct drm_device *dev, uint32_t maxX, uint32_t maxY) { struct drm_connector *connector; + int count = 0; list_for_each_entry(connector, &dev->mode_config.connector_list, head) { - drm_helper_probe_single_connector_modes(connector, maxX, maxY); + count += drm_helper_probe_single_connector_modes(connector, + maxX, maxY); } + + return count; } EXPORT_SYMBOL(drm_helper_probe_connector_modes); +static void drm_helper_add_std_modes(struct drm_device *dev, + struct drm_connector *connector) +{ + struct drm_display_mode *mode, *t; + int i; + + for (i = 0; i < ARRAY_SIZE(std_modes); i++) { + struct drm_display_mode *stdmode; + + /* + * When no valid EDID modes are available we end up + * here and bailed in the past, now we add some standard + * modes and move on. + */ + stdmode = drm_mode_duplicate(dev, &std_modes[i]); + drm_mode_probed_add(connector, stdmode); + drm_mode_list_concat(&connector->probed_modes, + &connector->modes); + + DRM_DEBUG("Adding mode %s to %s\n", stdmode->name, + drm_get_connector_name(connector)); + } + drm_mode_sort(&connector->modes); + + DRM_DEBUG("Added std modes on %s\n", drm_get_connector_name(connector)); + list_for_each_entry_safe(mode, t, &connector->modes, head) { + mode->vrefresh = drm_mode_vrefresh(mode); + + drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); + drm_mode_debug_printmodeline(mode); + } +} /** * drm_helper_crtc_in_use - check if a given CRTC is in a mode_config @@ -237,6 +261,8 @@ static void drm_enable_connectors(struct drm_device *dev, bool *enabled) list_for_each_entry(connector, &dev->mode_config.connector_list, head) { enabled[i] = drm_connector_enabled(connector, true); + DRM_DEBUG("connector %d enabled? %s\n", connector->base.id, + enabled[i] ? "yes" : "no"); any_enabled |= enabled[i]; i++; } @@ -265,11 +291,17 @@ static bool drm_target_preferred(struct drm_device *dev, continue; } + DRM_DEBUG("looking for preferred mode on connector %d\n", + connector->base.id); + modes[i] = drm_has_preferred_mode(connector, width, height); - if (!modes[i]) { + /* No preferred modes, pick one off the list */ + if (!modes[i] && !list_empty(&connector->modes)) { list_for_each_entry(modes[i], &connector->modes, head) break; } + DRM_DEBUG("found mode %s\n", modes[i] ? modes[i]->name : + "none"); i++; } return true; @@ -369,6 +401,8 @@ static void drm_setup_crtcs(struct drm_device *dev) int width, height; int i, ret; + DRM_DEBUG("\n"); + width = dev->mode_config.max_width; height = dev->mode_config.max_height; @@ -390,6 +424,8 @@ static void drm_setup_crtcs(struct drm_device *dev) if (!ret) DRM_ERROR("Unable to find initial modes\n"); + DRM_DEBUG("picking CRTCs for %dx%d config\n", width, height); + drm_pick_crtcs(dev, crtcs, modes, 0, width, height); i = 0; @@ -403,6 +439,8 @@ static void drm_setup_crtcs(struct drm_device *dev) } if (mode && crtc) { + DRM_DEBUG("desired mode %s set on crtc %d\n", + mode->name, crtc->base.id); crtc->desired_mode = mode; connector->encoder->crtc = crtc; } else @@ -414,6 +452,59 @@ static void drm_setup_crtcs(struct drm_device *dev) kfree(modes); kfree(enabled); } + +/** + * drm_encoder_crtc_ok - can a given crtc drive a given encoder? + * @encoder: encoder to test + * @crtc: crtc to test + * + * Return false if @encoder can't be driven by @crtc, true otherwise. + */ +static bool drm_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?"); + + 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; +} + +/* + * Check the CRTC we're going to map each output to vs. its current + * CRTC. If they don't match, we have to disable the output and the CRTC + * since the driver will have to re-route things. + */ +static void +drm_crtc_prepare_encoders(struct drm_device *dev) +{ + struct drm_encoder_helper_funcs *encoder_funcs; + struct drm_encoder *encoder; + + list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { + encoder_funcs = encoder->helper_private; + /* Disable unused encoders */ + if (encoder->crtc == NULL) + (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); + /* Disable encoders whose CRTC is about to change */ + if (encoder_funcs->get_crtc && + encoder->crtc != (*encoder_funcs->get_crtc)(encoder)) + (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); + } +} + /** * drm_crtc_set_mode - set a mode * @crtc: CRTC to program @@ -442,6 +533,7 @@ 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); @@ -450,6 +542,15 @@ 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; @@ -462,9 +563,10 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, crtc->y = y; if (drm_mode_equal(&saved_mode, &crtc->mode)) { - if (saved_x != crtc->x || saved_y != crtc->y) { - crtc_funcs->mode_set_base(crtc, crtc->x, crtc->y, - old_fb); + 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; } } @@ -498,12 +600,16 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, encoder_funcs->prepare(encoder); } + drm_crtc_prepare_encoders(dev); + crtc_funcs->prepare(crtc); /* Set up the DPLL and any encoders state that needs to adjust or depend * on the DPLL. */ - crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); + ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb); + if (!ret) + goto done; list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { @@ -566,10 +672,10 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set) struct drm_device *dev; struct drm_crtc **save_crtcs, *new_crtc; struct drm_encoder **save_encoders, *new_encoder; - struct drm_framebuffer *old_fb; + struct drm_framebuffer *old_fb = NULL; bool save_enabled; - bool changed = false; - bool flip_or_move = false; + bool mode_changed = false; + bool fb_changed = false; struct drm_connector *connector; int count = 0, ro, fail = 0; struct drm_crtc_helper_funcs *crtc_funcs; @@ -597,7 +703,10 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set) /* save previous config */ save_enabled = set->crtc->enabled; - /* this is meant to be num_connector not num_crtc */ + /* + * We do mode_config.num_connectors here since we'll look at the + * CRTC and encoder associated with each connector later. + */ save_crtcs = kzalloc(dev->mode_config.num_connector * sizeof(struct drm_crtc *), GFP_KERNEL); if (!save_crtcs) @@ -613,21 +722,26 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set) /* 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 its a change not a flip */ - if (set->crtc->fb == NULL) - changed = true; + /* If we have no fb then treat it as a full mode set */ + if (set->crtc->fb == NULL) { + DRM_DEBUG("crtc has no fb, full mode set\n"); + mode_changed = true; + } else if ((set->fb->bits_per_pixel != + set->crtc->fb->bits_per_pixel) || + set->fb->depth != set->crtc->fb->depth) + fb_changed = true; else - flip_or_move = true; + fb_changed = true; } if (set->x != set->crtc->x || set->y != set->crtc->y) - flip_or_move = true; + fb_changed = true; if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) { - DRM_DEBUG("modes are different\n"); + DRM_DEBUG("modes are different, full mode set\n"); drm_mode_debug_printmodeline(&set->crtc->mode); drm_mode_debug_printmodeline(set->mode); - changed = true; + mode_changed = true; } /* a) traverse passed in connector list and get encoders for them */ @@ -650,7 +764,8 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set) } if (new_encoder != connector->encoder) { - changed = true; + DRM_DEBUG("encoder changed, full mode switch\n"); + mode_changed = true; connector->encoder = new_encoder; } } @@ -676,17 +791,27 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set) if (set->connectors[ro] == connector) new_crtc = set->crtc; } + + /* Make sure the new CRTC will work with the encoder */ + if (new_crtc && + !drm_encoder_crtc_ok(connector->encoder, new_crtc)) { + ret = -EINVAL; + goto fail_set_mode; + } if (new_crtc != connector->encoder->crtc) { - changed = true; + DRM_DEBUG("crtc changed, full mode switch\n"); + mode_changed = true; connector->encoder->crtc = new_crtc; } + DRM_DEBUG("setting connector %d crtc to %p\n", + connector->base.id, new_crtc); } /* mode_set_base is not a required function */ - if (flip_or_move && !crtc_funcs->mode_set_base) - changed = true; + if (fb_changed && !crtc_funcs->mode_set_base) + mode_changed = true; - if (changed) { + if (mode_changed) { old_fb = set->crtc->fb; set->crtc->fb = set->fb; set->crtc->enabled = (set->mode != NULL); @@ -696,6 +821,8 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set) if (!drm_crtc_helper_set_mode(set->crtc, set->mode, set->x, set->y, old_fb)) { + DRM_ERROR("failed to set mode on crtc %p\n", + set->crtc); ret = -EINVAL; goto fail_set_mode; } @@ -705,11 +832,14 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set) set->crtc->desired_mode = set->mode; } drm_helper_disable_unused_functions(dev); - } else if (flip_or_move) { + } else if (fb_changed) { old_fb = set->crtc->fb; if (set->crtc->fb != set->fb) set->crtc->fb = set->fb; - crtc_funcs->mode_set_base(set->crtc, set->x, set->y, old_fb); + ret = crtc_funcs->mode_set_base(set->crtc, + set->x, set->y, old_fb); + if (ret != 0) + goto fail_set_mode; } kfree(save_encoders); @@ -718,9 +848,14 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set) fail_set_mode: set->crtc->enabled = save_enabled; + set->crtc->fb = old_fb; count = 0; - list_for_each_entry(connector, &dev->mode_config.connector_list, head) + list_for_each_entry(connector, &dev->mode_config.connector_list, head) { + if (!connector->encoder) + continue; + connector->encoder->crtc = save_crtcs[count++]; + } fail_no_encoder: kfree(save_crtcs); count = 0; @@ -764,10 +899,31 @@ bool drm_helper_plugged_event(struct drm_device *dev) */ bool drm_helper_initial_config(struct drm_device *dev, bool can_grow) { - int ret = false; + struct drm_connector *connector; + int count = 0; - drm_helper_plugged_event(dev); - return ret; + count = drm_helper_probe_connector_modes(dev, + dev->mode_config.max_width, + dev->mode_config.max_height); + + /* + * None of the available connectors had any modes, so add some + * and try to light them up anyway + */ + if (!count) { + DRM_ERROR("connectors have no modes, using standard modes\n"); + list_for_each_entry(connector, + &dev->mode_config.connector_list, + head) + drm_helper_add_std_modes(dev, connector); + } + + drm_setup_crtcs(dev); + + /* alert the driver fb layer */ + dev->mode_config.funcs->fb_changed(dev); + + return 0; } EXPORT_SYMBOL(drm_helper_initial_config); |
