diff options
Diffstat (limited to 'drivers/gpu/drm/drm_crtc_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc_helper.c | 1071 |
1 files changed, 389 insertions, 682 deletions
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index 4231d6db72e..78b37f3febd 100644 --- a/drivers/gpu/drm/drm_crtc_helper.c +++ b/drivers/gpu/drm/drm_crtc_helper.c @@ -29,161 +29,75 @@ * Jesse Barnes <jesse.barnes@intel.com> */ -#include "drmP.h" -#include "drm_crtc.h" -#include "drm_crtc_helper.h" -#include "drm_fb_helper.h" +#include <linux/kernel.h> +#include <linux/export.h> +#include <linux/moduleparam.h> -static void drm_mode_validate_flag(struct drm_connector *connector, - int flags) -{ - struct drm_display_mode *mode, *t; - - if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE)) - return; +#include <drm/drmP.h> +#include <drm/drm_crtc.h> +#include <drm/drm_fourcc.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_edid.h> - list_for_each_entry_safe(mode, t, &connector->modes, head) { - if ((mode->flags & DRM_MODE_FLAG_INTERLACE) && - !(flags & DRM_MODE_FLAG_INTERLACE)) - mode->status = MODE_NO_INTERLACE; - if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) && - !(flags & DRM_MODE_FLAG_DBLSCAN)) - mode->status = MODE_NO_DBLESCAN; - } - - return; -} +MODULE_AUTHOR("David Airlie, Jesse Barnes"); +MODULE_DESCRIPTION("DRM KMS helper"); +MODULE_LICENSE("GPL and additional rights"); /** - * drm_helper_probe_connector_modes - get complete set of display modes - * @dev: DRM device - * @maxX: max width for modes - * @maxY: max height for modes - * - * LOCKING: - * Caller must hold mode config lock. - * - * Based on @dev's mode_config layout, scan all the connectors and try to detect - * modes on them. Modes will first be added to the connector's probed_modes - * list, then culled (based on validity and the @maxX, @maxY parameters) and - * put into the normal modes list. - * - * Intended to be used either at bootup time or when major configuration - * changes have occurred. + * drm_helper_move_panel_connectors_to_head() - move panels to the front in the + * connector list + * @dev: drm device to operate on * - * FIXME: take into account monitor limits - * - * RETURNS: - * Number of modes found on @connector. + * Some userspace presumes that the first connected connector is the main + * display, where it's supposed to display e.g. the login screen. For + * laptops, this should be the main panel. Use this function to sort all + * (eDP/LVDS) panels to the front of the connector list, instead of + * painstakingly trying to initialize them in the right order. */ -int drm_helper_probe_single_connector_modes(struct drm_connector *connector, - uint32_t maxX, uint32_t maxY) +void drm_helper_move_panel_connectors_to_head(struct drm_device *dev) { - struct drm_device *dev = connector->dev; - struct drm_display_mode *mode, *t; - struct drm_connector_helper_funcs *connector_funcs = - connector->helper_private; - int count = 0; - int mode_flags = 0; - - DRM_DEBUG_KMS("%s\n", drm_get_connector_name(connector)); - /* set all modes to the unverified state */ - list_for_each_entry_safe(mode, t, &connector->modes, head) - mode->status = MODE_UNVERIFIED; - - if (connector->force) { - if (connector->force == DRM_FORCE_ON) - connector->status = connector_status_connected; - else - connector->status = connector_status_disconnected; - if (connector->funcs->force) - connector->funcs->force(connector); - } else - connector->status = connector->funcs->detect(connector); - - if (connector->status == connector_status_disconnected) { - DRM_DEBUG_KMS("%s is disconnected\n", - drm_get_connector_name(connector)); - goto prune; - } - - count = (*connector_funcs->get_modes)(connector); - if (!count) { - count = drm_add_modes_noedid(connector, 1024, 768); - if (!count) - return 0; - } - - drm_mode_connector_list_update(connector); - - if (maxX && maxY) - drm_mode_validate_size(dev, &connector->modes, maxX, - maxY, 0); - - if (connector->interlace_allowed) - mode_flags |= DRM_MODE_FLAG_INTERLACE; - if (connector->doublescan_allowed) - mode_flags |= DRM_MODE_FLAG_DBLSCAN; - drm_mode_validate_flag(connector, mode_flags); - - list_for_each_entry_safe(mode, t, &connector->modes, head) { - if (mode->status == MODE_OK) - mode->status = connector_funcs->mode_valid(connector, - mode); - } + struct drm_connector *connector, *tmp; + struct list_head panel_list; -prune: - drm_mode_prune_invalid(dev, &connector->modes, true); + INIT_LIST_HEAD(&panel_list); - if (list_empty(&connector->modes)) - return 0; - - drm_mode_sort(&connector->modes); - - DRM_DEBUG_KMS("Probed modes for %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); + list_for_each_entry_safe(connector, tmp, + &dev->mode_config.connector_list, head) { + if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS || + connector->connector_type == DRM_MODE_CONNECTOR_eDP) + list_move_tail(&connector->head, &panel_list); } - return count; + list_splice(&panel_list, &dev->mode_config.connector_list); } -EXPORT_SYMBOL(drm_helper_probe_single_connector_modes); - -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) { - count += drm_helper_probe_single_connector_modes(connector, - maxX, maxY); - } - - return count; -} -EXPORT_SYMBOL(drm_helper_probe_connector_modes); +EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head); /** * 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. + * Checks whether @encoder is with the current mode setting output configuration + * in use by any connector. This doesn't mean that it is actually enabled since + * the DPMS state is tracked separately. * - * RETURNS: - * True if @encoder is part of the mode_config, false otherwise. + * Returns: + * True if @encoder is used, false otherwise. */ bool drm_helper_encoder_in_use(struct drm_encoder *encoder) { struct drm_connector *connector; struct drm_device *dev = encoder->dev; + + /* + * We can expect this mutex to be locked if we are not panicking. + * Locking is currently fubar in the panic handler. + */ + if (!oops_in_progress) { + WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); + WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); + } + list_for_each_entry(connector, &dev->mode_config.connector_list, head) if (connector->encoder == encoder) return true; @@ -195,19 +109,25 @@ 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 * - * LOCKING: - * Caller must hold mode config lock. - * - * Walk @crtc's DRM device's mode_config and see if it's in use. + * Checks whether @crtc is with the current mode setting output configuration + * in use by any connector. This doesn't mean that it is actually enabled since + * the DPMS state is tracked separately. * - * RETURNS: - * True if @crtc is part of the mode_config, false otherwise. + * Returns: + * True if @crtc is used, false otherwise. */ bool drm_helper_crtc_in_use(struct drm_crtc *crtc) { struct drm_encoder *encoder; struct drm_device *dev = crtc->dev; - /* FIXME: Locking around list access? */ + + /* + * We can expect this mutex to be locked if we are not panicking. + * Locking is currently fubar in the panic handler. + */ + if (!oops_in_progress) + WARN_ON(!mutex_is_locked(&dev->mode_config.mutex)); + list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder)) return true; @@ -215,38 +135,34 @@ bool drm_helper_crtc_in_use(struct drm_crtc *crtc) } EXPORT_SYMBOL(drm_helper_crtc_in_use); -/** - * drm_disable_unused_functions - disable unused objects - * @dev: DRM device - * - * LOCKING: - * Caller must hold mode config lock. - * - * If an connector or CRTC isn't part of @dev's mode_config, it can be disabled - * by calling its dpms function, which should power it off. - */ -void drm_helper_disable_unused_functions(struct drm_device *dev) +static void +drm_encoder_disable(struct drm_encoder *encoder) +{ + struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private; + + if (encoder->bridge) + encoder->bridge->funcs->disable(encoder->bridge); + + if (encoder_funcs->disable) + (*encoder_funcs->disable)(encoder); + else + (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); + + if (encoder->bridge) + encoder->bridge->funcs->post_disable(encoder->bridge); +} + +static void __drm_helper_disable_unused_functions(struct drm_device *dev) { struct drm_encoder *encoder; - struct drm_connector *connector; - struct drm_encoder_helper_funcs *encoder_funcs; struct drm_crtc *crtc; - list_for_each_entry(connector, &dev->mode_config.connector_list, head) { - if (!connector->encoder) - continue; - if (connector->status == connector_status_disconnected) - connector->encoder = NULL; - } + drm_warn_on_modeset_not_all_locked(dev); list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { - encoder_funcs = encoder->helper_private; if (!drm_helper_encoder_in_use(encoder)) { - if (encoder_funcs->disable) - (*encoder_funcs->disable)(encoder); - else - (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); - /* disconnector encoder from any connector */ + drm_encoder_disable(encoder); + /* disconnect encoder from any connector */ encoder->crtc = NULL; } } @@ -255,337 +171,32 @@ void drm_helper_disable_unused_functions(struct drm_device *dev) struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; crtc->enabled = drm_helper_crtc_in_use(crtc); if (!crtc->enabled) { - crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF); - crtc->fb = NULL; - } - } -} -EXPORT_SYMBOL(drm_helper_disable_unused_functions); - -static struct drm_display_mode *drm_has_preferred_mode(struct drm_connector *connector, int width, int height) -{ - struct drm_display_mode *mode; - - list_for_each_entry(mode, &connector->modes, head) { - if (drm_mode_width(mode) > width || - drm_mode_height(mode) > height) - continue; - if (mode->type & DRM_MODE_TYPE_PREFERRED) - return mode; - } - return NULL; -} - -static bool drm_has_cmdline_mode(struct drm_connector *connector) -{ - struct drm_fb_helper_connector *fb_help_conn = connector->fb_helper_private; - struct drm_fb_helper_cmdline_mode *cmdline_mode; - - if (!fb_help_conn) - return false; - - cmdline_mode = &fb_help_conn->cmdline_mode; - return cmdline_mode->specified; -} - -static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_connector *connector, int width, int height) -{ - struct drm_fb_helper_connector *fb_help_conn = connector->fb_helper_private; - struct drm_fb_helper_cmdline_mode *cmdline_mode; - struct drm_display_mode *mode = NULL; - - if (!fb_help_conn) - return mode; - - cmdline_mode = &fb_help_conn->cmdline_mode; - if (cmdline_mode->specified == false) - return mode; - - /* attempt to find a matching mode in the list of modes - * we have gotten so far, if not add a CVT mode that conforms - */ - if (cmdline_mode->rb || cmdline_mode->margins) - goto create_mode; - - list_for_each_entry(mode, &connector->modes, head) { - /* check width/height */ - if (mode->hdisplay != cmdline_mode->xres || - mode->vdisplay != cmdline_mode->yres) - continue; - - if (cmdline_mode->refresh_specified) { - if (mode->vrefresh != cmdline_mode->refresh) - continue; - } - - if (cmdline_mode->interlace) { - if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) - continue; - } - return mode; - } - -create_mode: - mode = drm_cvt_mode(connector->dev, cmdline_mode->xres, - cmdline_mode->yres, - cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60, - cmdline_mode->rb, cmdline_mode->interlace, - cmdline_mode->margins); - drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V); - list_add(&mode->head, &connector->modes); - return mode; -} - -static bool drm_connector_enabled(struct drm_connector *connector, bool strict) -{ - bool enable; - - if (strict) { - enable = connector->status == connector_status_connected; - } else { - enable = connector->status != connector_status_disconnected; - } - return enable; -} - -static void drm_enable_connectors(struct drm_device *dev, bool *enabled) -{ - bool any_enabled = false; - struct drm_connector *connector; - int i = 0; - - list_for_each_entry(connector, &dev->mode_config.connector_list, head) { - enabled[i] = drm_connector_enabled(connector, true); - DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, - enabled[i] ? "yes" : "no"); - any_enabled |= enabled[i]; - i++; - } - - if (any_enabled) - return; - - i = 0; - list_for_each_entry(connector, &dev->mode_config.connector_list, head) { - enabled[i] = drm_connector_enabled(connector, false); - i++; - } -} - -static bool drm_target_preferred(struct drm_device *dev, - struct drm_display_mode **modes, - bool *enabled, int width, int height) -{ - struct drm_connector *connector; - int i = 0; - - list_for_each_entry(connector, &dev->mode_config.connector_list, head) { - - if (enabled[i] == false) { - i++; - continue; - } - - DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", - connector->base.id); - - /* got for command line mode first */ - modes[i] = drm_pick_cmdline_mode(connector, width, height); - if (!modes[i]) { - DRM_DEBUG_KMS("looking for preferred mode on connector %d\n", - connector->base.id); - modes[i] = drm_has_preferred_mode(connector, width, height); - } - /* 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_KMS("found mode %s\n", modes[i] ? modes[i]->name : - "none"); - i++; - } - return true; -} - -static int drm_pick_crtcs(struct drm_device *dev, - struct drm_crtc **best_crtcs, - struct drm_display_mode **modes, - int n, int width, int height) -{ - int c, o; - struct drm_connector *connector; - struct drm_connector_helper_funcs *connector_funcs; - struct drm_encoder *encoder; - struct drm_crtc *best_crtc; - int my_score, best_score, score; - struct drm_crtc **crtcs, *crtc; - - if (n == dev->mode_config.num_connector) - return 0; - c = 0; - list_for_each_entry(connector, &dev->mode_config.connector_list, head) { - if (c == n) - break; - c++; - } - - best_crtcs[n] = NULL; - best_crtc = NULL; - best_score = drm_pick_crtcs(dev, best_crtcs, modes, n+1, width, height); - if (modes[n] == NULL) - return best_score; - - crtcs = kmalloc(dev->mode_config.num_connector * - sizeof(struct drm_crtc *), GFP_KERNEL); - if (!crtcs) - return best_score; - - my_score = 1; - if (connector->status == connector_status_connected) - my_score++; - if (drm_has_cmdline_mode(connector)) - my_score++; - if (drm_has_preferred_mode(connector, width, height)) - my_score++; - - connector_funcs = connector->helper_private; - encoder = connector_funcs->best_encoder(connector); - if (!encoder) - goto out; - - connector->encoder = encoder; - - /* select a crtc for this connector and then attempt to configure - remaining connectors */ - c = 0; - list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { - - if ((encoder->possible_crtcs & (1 << c)) == 0) { - c++; - continue; - } - - for (o = 0; o < n; o++) - if (best_crtcs[o] == crtc) - break; - - if (o < n) { - /* ignore cloning for now */ - c++; - continue; - } - - crtcs[n] = crtc; - memcpy(crtcs, best_crtcs, n * sizeof(struct drm_crtc *)); - score = my_score + drm_pick_crtcs(dev, crtcs, modes, n + 1, - width, height); - if (score > best_score) { - best_crtc = crtc; - best_score = score; - memcpy(best_crtcs, crtcs, - dev->mode_config.num_connector * - sizeof(struct drm_crtc *)); - } - c++; - } -out: - kfree(crtcs); - return best_score; -} - -static void drm_setup_crtcs(struct drm_device *dev) -{ - struct drm_crtc **crtcs; - struct drm_display_mode **modes; - struct drm_encoder *encoder; - struct drm_connector *connector; - bool *enabled; - int width, height; - int i, ret; - - DRM_DEBUG_KMS("\n"); - - width = dev->mode_config.max_width; - height = dev->mode_config.max_height; - - /* clean out all the encoder/crtc combos */ - list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { - encoder->crtc = NULL; - } - - crtcs = kcalloc(dev->mode_config.num_connector, - sizeof(struct drm_crtc *), GFP_KERNEL); - modes = kcalloc(dev->mode_config.num_connector, - sizeof(struct drm_display_mode *), GFP_KERNEL); - enabled = kcalloc(dev->mode_config.num_connector, - sizeof(bool), GFP_KERNEL); - - drm_enable_connectors(dev, enabled); - - ret = drm_target_preferred(dev, modes, enabled, width, height); - if (!ret) - DRM_ERROR("Unable to find initial modes\n"); - - DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height); - - drm_pick_crtcs(dev, crtcs, modes, 0, width, height); - - i = 0; - list_for_each_entry(connector, &dev->mode_config.connector_list, head) { - struct drm_display_mode *mode = modes[i]; - struct drm_crtc *crtc = crtcs[i]; - - if (connector->encoder == NULL) { - i++; - continue; - } - - if (mode && crtc) { - DRM_DEBUG_KMS("desired mode %s set on crtc %d\n", - mode->name, crtc->base.id); - crtc->desired_mode = mode; - connector->encoder->crtc = crtc; - } else { - connector->encoder->crtc = NULL; - connector->encoder = NULL; + if (crtc_funcs->disable) + (*crtc_funcs->disable)(crtc); + else + (*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF); + crtc->primary->fb = NULL; } - i++; } - - kfree(crtcs); - kfree(modes); - kfree(enabled); } /** - * drm_encoder_crtc_ok - can a given crtc drive a given encoder? - * @encoder: encoder to test - * @crtc: crtc to test + * drm_helper_disable_unused_functions - disable unused objects + * @dev: DRM device * - * Return false if @encoder can't be driven by @crtc, true otherwise. + * This function walks through the entire mode setting configuration of @dev. It + * will remove any crtc links of unused encoders and encoder links of + * disconnected connectors. Then it will disable all unused encoders and crtcs + * either by calling their disable callback if available or by calling their + * dpms callback with DRM_MODE_DPMS_OFF. */ -static bool drm_encoder_crtc_ok(struct drm_encoder *encoder, - struct drm_crtc *crtc) +void drm_helper_disable_unused_functions(struct drm_device *dev) { - 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; + drm_modeset_lock_all(dev); + __drm_helper_disable_unused_functions(dev); + drm_modeset_unlock_all(dev); } +EXPORT_SYMBOL(drm_helper_disable_unused_functions); /* * Check the CRTC we're going to map each output to vs. its current @@ -602,29 +213,33 @@ drm_crtc_prepare_encoders(struct drm_device *dev) encoder_funcs = encoder->helper_private; /* Disable unused encoders */ if (encoder->crtc == NULL) - (*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF); + drm_encoder_disable(encoder); /* 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_encoder_disable(encoder); } } /** - * drm_crtc_set_mode - set a mode + * drm_crtc_helper_set_mode - internal helper to set a mode * @crtc: CRTC to program * @mode: mode to use - * @x: width of mode - * @y: height of mode - * - * LOCKING: - * Caller must hold mode config lock. + * @x: horizontal offset into the surface + * @y: vertical offset into the surface + * @old_fb: old framebuffer, for cleanup * * Try to set @mode on @crtc. Give @crtc and its associated connectors a chance - * to fixup or reject the mode prior to trying to set it. + * to fixup or reject the mode prior to trying to set it. This is an internal + * helper that drivers could e.g. use to update properties that require the + * entire output pipe to be disabled and re-enabled in a new configuration. For + * example for changing whether audio is enabled on a hdmi link or for changing + * panel fitter or dither attributes. It is also called by the + * drm_crtc_helper_set_config() helper function to drive the mode setting + * sequence. * - * RETURNS: - * True if the mode was set successfully, or false otherwise. + * Returns: + * True if the mode was set successfully, false otherwise. */ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, struct drm_display_mode *mode, @@ -636,16 +251,23 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; struct drm_encoder_helper_funcs *encoder_funcs; int saved_x, saved_y; + bool saved_enabled; struct drm_encoder *encoder; bool ret = true; - adjusted_mode = drm_mode_duplicate(dev, mode); + drm_warn_on_modeset_not_all_locked(dev); + saved_enabled = crtc->enabled; crtc->enabled = drm_helper_crtc_in_use(crtc); - if (!crtc->enabled) return true; + adjusted_mode = drm_mode_duplicate(dev, mode); + if (!adjusted_mode) { + crtc->enabled = saved_enabled; + return false; + } + saved_mode = crtc->mode; saved_x = crtc->x; saved_y = crtc->y; @@ -665,25 +287,45 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, if (encoder->crtc != crtc) continue; + + if (encoder->bridge && encoder->bridge->funcs->mode_fixup) { + ret = encoder->bridge->funcs->mode_fixup( + encoder->bridge, mode, adjusted_mode); + if (!ret) { + DRM_DEBUG_KMS("Bridge fixup failed\n"); + goto done; + } + } + encoder_funcs = encoder->helper_private; if (!(ret = encoder_funcs->mode_fixup(encoder, mode, adjusted_mode))) { + DRM_DEBUG_KMS("Encoder fixup failed\n"); goto done; } } if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) { + DRM_DEBUG_KMS("CRTC fixup failed\n"); goto done; } + DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id); /* Prepare the encoders and CRTCs before setting the mode. */ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { if (encoder->crtc != crtc) continue; + + if (encoder->bridge) + encoder->bridge->funcs->disable(encoder->bridge); + encoder_funcs = encoder->helper_private; /* Disable the encoders as the first thing we do. */ encoder_funcs->prepare(encoder); + + if (encoder->bridge) + encoder->bridge->funcs->post_disable(encoder->bridge); } drm_crtc_prepare_encoders(dev); @@ -702,10 +344,15 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, if (encoder->crtc != crtc) continue; - DRM_INFO("%s: set mode %s %x\n", drm_get_encoder_name(encoder), - mode->name, mode->base.id); + DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n", + encoder->base.id, encoder->name, + mode->base.id, mode->name); encoder_funcs = encoder->helper_private; encoder_funcs->mode_set(encoder, mode, adjusted_mode); + + if (encoder->bridge && encoder->bridge->funcs->mode_set) + encoder->bridge->funcs->mode_set(encoder->bridge, mode, + adjusted_mode); } /* Now enable the clocks, plane, pipe, and connectors that we set up. */ @@ -716,16 +363,30 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, if (encoder->crtc != crtc) continue; + if (encoder->bridge) + encoder->bridge->funcs->pre_enable(encoder->bridge); + encoder_funcs = encoder->helper_private; encoder_funcs->commit(encoder); + if (encoder->bridge) + encoder->bridge->funcs->enable(encoder->bridge); } - /* XXX free adjustedmode */ - drm_mode_destroy(dev, adjusted_mode); + /* Store real post-adjustment hardware mode. */ + crtc->hwmode = *adjusted_mode; + + /* Calculate and store various constants which + * are later needed by vblank and swap-completion + * timestamping. They are derived from true hwmode. + */ + drm_calc_timestamping_constants(crtc, &crtc->hwmode); + /* FIXME: add subpixel order */ done: + drm_mode_destroy(dev, adjusted_mode); if (!ret) { + crtc->enabled = saved_enabled; crtc->mode = saved_mode; crtc->x = saved_x; crtc->y = saved_y; @@ -735,89 +396,115 @@ done: } EXPORT_SYMBOL(drm_crtc_helper_set_mode); +static void +drm_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() ought to be + * doing this, but since we've decoupled the encoder + * from the connector above, the required connection + * between them is henceforth no longer available. + */ + connector->dpms = DRM_MODE_DPMS_OFF; + } + } + + __drm_helper_disable_unused_functions(dev); +} /** * drm_crtc_helper_set_config - set a new config from userspace - * @crtc: CRTC to setup - * @crtc_info: user provided configuration - * @new_mode: new mode to set - * @connector_set: set of connectors for the new config - * @fb: new framebuffer - * - * LOCKING: - * Caller must hold mode config lock. + * @set: mode set configuration * - * Setup a new configuration, provided by the user in @crtc_info, and enable - * it. + * Setup a new configuration, provided by the upper layers (either an ioctl call + * from userspace or internally e.g. from the fbdev support code) in @set, and + * enable it. This is the main helper functions for drivers that implement + * kernel mode setting with the crtc helper functions and the assorted + * ->prepare(), ->modeset() and ->commit() helper callbacks. * - * RETURNS: - * Zero. (FIXME) + * Returns: + * Returns 0 on success, negative errno numbers on failure. */ int drm_crtc_helper_set_config(struct drm_mode_set *set) { struct drm_device *dev; - struct drm_crtc *save_crtcs, *new_crtc, *crtc; + struct drm_crtc *new_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; - int ret = 0; + struct drm_mode_set save_set; + int ret; + int i; DRM_DEBUG_KMS("\n"); - if (!set) - return -EINVAL; - - if (!set->crtc) - return -EINVAL; + BUG_ON(!set); + BUG_ON(!set->crtc); + BUG_ON(!set->crtc->helper_private); - if (!set->crtc->helper_private) - return -EINVAL; + /* Enforce sane interface api - has been abused by the fb helper. */ + BUG_ON(!set->mode && set->fb); + BUG_ON(set->fb && set->num_connectors == 0); crtc_funcs = set->crtc->helper_private; - DRM_DEBUG_KMS("crtc: %p %d fb: %p connectors: %p num_connectors:" - " %d (x, y) (%i, %i)\n", - set->crtc, set->crtc->base.id, set->fb, set->connectors, - (int)set->num_connectors, set->x, set->y); + 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); + drm_crtc_helper_disable(set->crtc); + return 0; + } 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; + drm_warn_on_modeset_not_all_locked(dev); + /* + * Allocate space for the backup of all (non-pointer) encoder and + * connector data. + */ save_encoders = kzalloc(dev->mode_config.num_encoder * sizeof(struct drm_encoder), GFP_KERNEL); - if (!save_encoders) { - kfree(save_crtcs); + if (!save_encoders) 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. + /* + * 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; } @@ -827,20 +514,25 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set) 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->primary->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 (set->crtc->primary->fb != set->fb) { /* If we have no fb then treat it as a full mode set */ - if (set->crtc->fb == NULL) { + if (set->crtc->primary->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->bits_per_pixel != - set->crtc->fb->bits_per_pixel) || - set->fb->depth != set->crtc->fb->depth) - fb_changed = true; - else + } else if (set->fb->pixel_format != + set->crtc->primary->fb->pixel_format) { + mode_changed = true; + } else fb_changed = true; } @@ -868,6 +560,12 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set) if (new_encoder == NULL) /* don't break so fail path works correct */ fail = 1; + + if (connector->dpms != DRM_MODE_DPMS_ON) { + DRM_DEBUG_KMS("connector dpms not on, full mode switch\n"); + mode_changed = true; + } + break; } } @@ -915,8 +613,14 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set) mode_changed = true; connector->encoder->crtc = new_crtc; } - DRM_DEBUG_KMS("setting connector %d crtc to %p\n", - connector->base.id, new_crtc); + if (new_crtc) { + DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n", + connector->base.id, connector->name, + new_crtc->base.id); + } else { + DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n", + connector->base.id, connector->name); + } } /* mode_set_base is not a required function */ @@ -924,53 +628,49 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set) mode_changed = true; if (mode_changed) { - old_fb = set->crtc->fb; - set->crtc->fb = set->fb; - set->crtc->enabled = (set->mode != NULL); - if (set->mode != NULL) { + if (drm_helper_crtc_in_use(set->crtc)) { DRM_DEBUG_KMS("attempting to set mode from" " userspace\n"); drm_mode_debug_printmodeline(set->mode); + set->crtc->primary->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 %p\n", - set->crtc); + save_set.fb)) { + DRM_ERROR("failed to set mode on [CRTC:%d]\n", + set->crtc->base.id); + set->crtc->primary->fb = save_set.fb; ret = -EINVAL; goto fail; } - /* TODO are these needed? */ - set->crtc->desired_x = set->x; - set->crtc->desired_y = set->y; - set->crtc->desired_mode = set->mode; + 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, + set->connectors[i]->name); + set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON); + } } - drm_helper_disable_unused_functions(dev); + __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; + set->crtc->primary->fb = set->fb; ret = crtc_funcs->mode_set_base(set->crtc, - set->x, set->y, old_fb); - if (ret != 0) + set->x, set->y, save_set.fb); + if (ret != 0) { + set->crtc->x = save_set.x; + set->crtc->y = save_set.y; + set->crtc->primary->fb = save_set.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++]; } @@ -980,69 +680,18 @@ fail: *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; } EXPORT_SYMBOL(drm_crtc_helper_set_config); -bool drm_helper_plugged_event(struct drm_device *dev) -{ - DRM_DEBUG_KMS("\n"); - - drm_helper_probe_connector_modes(dev, dev->mode_config.max_width, - dev->mode_config.max_height); - - drm_setup_crtcs(dev); - - /* alert the driver fb layer */ - dev->mode_config.funcs->fb_changed(dev); - - /* FIXME: send hotplug event */ - return true; -} -/** - * drm_initial_config - setup a sane initial connector configuration - * @dev: DRM device - * - * LOCKING: - * Called at init time, must take mode config lock. - * - * Scan the CRTCs and connectors and try to put together an initial setup. - * At the moment, this is a cloned configuration across all heads with - * a new framebuffer object as the backing store. - * - * RETURNS: - * Zero if everything went ok, nonzero otherwise. - */ -bool drm_helper_initial_config(struct drm_device *dev) -{ - int count = 0; - - /* disable all the possible outputs/crtcs before entering KMS mode */ - drm_helper_disable_unused_functions(dev); - - drm_fb_helper_parse_command_line(dev); - - count = drm_helper_probe_connector_modes(dev, - dev->mode_config.max_width, - dev->mode_config.max_height); - - /* - * we shouldn't end up with no modes here. - */ - WARN(!count, "No connectors reported connected with modes\n"); - - drm_setup_crtcs(dev); - - /* alert the driver fb layer */ - dev->mode_config.funcs->fb_changed(dev); - - return 0; -} -EXPORT_SYMBOL(drm_helper_initial_config); - static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) { int dpms = DRM_MODE_DPMS_OFF; @@ -1056,6 +705,31 @@ static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder) return dpms; } +/* Helper which handles bridge ordering around encoder dpms */ +static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode) +{ + struct drm_bridge *bridge = encoder->bridge; + struct drm_encoder_helper_funcs *encoder_funcs; + + if (bridge) { + if (mode == DRM_MODE_DPMS_ON) + bridge->funcs->pre_enable(bridge); + else + bridge->funcs->disable(bridge); + } + + encoder_funcs = encoder->helper_private; + if (encoder_funcs->dpms) + encoder_funcs->dpms(encoder, mode); + + if (bridge) { + if (mode == DRM_MODE_DPMS_ON) + bridge->funcs->enable(bridge); + else + bridge->funcs->post_disable(bridge); + } +} + static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) { int dpms = DRM_MODE_DPMS_OFF; @@ -1070,18 +744,20 @@ static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) } /** - * drm_helper_connector_dpms - * @connector affected connector - * @mode DPMS mode + * drm_helper_connector_dpms() - connector dpms helper implementation + * @connector: affected connector + * @mode: DPMS mode * - * Calls the low-level connector DPMS function, then - * calls appropriate encoder and crtc DPMS functions as well + * This is the main helper function provided by the crtc helper framework for + * implementing the DPMS connector attribute. It computes the new desired DPMS + * state for all encoders and crtcs in the output mesh and calls the ->dpms() + * callback provided by the driver appropriately. */ 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; + int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF; if (mode == connector->dpms) return; @@ -1089,6 +765,9 @@ void drm_helper_connector_dpms(struct drm_connector *connector, int mode) old_dpms = connector->dpms; connector->dpms = mode; + if (encoder) + encoder_dpms = drm_helper_choose_encoder_dpms(encoder); + /* from off to on, do crtc then encoder */ if (mode < old_dpms) { if (crtc) { @@ -1097,22 +776,14 @@ void drm_helper_connector_dpms(struct drm_connector *connector, int mode) (*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)); - } + if (encoder) + drm_helper_encoder_dpms(encoder, encoder_dpms); } /* 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 (encoder) + drm_helper_encoder_dpms(encoder, encoder_dpms); if (crtc) { struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private; if (crtc_funcs->dpms) @@ -1126,57 +797,93 @@ void drm_helper_connector_dpms(struct drm_connector *connector, int mode) EXPORT_SYMBOL(drm_helper_connector_dpms); /** - * drm_hotplug_stage_two - * @dev DRM device - * @connector hotpluged connector - * - * LOCKING. - * Caller must hold mode config lock, function might grab struct lock. - * - * Stage two of a hotplug. + * drm_helper_mode_fill_fb_struct - fill out framebuffer metadata + * @fb: drm_framebuffer object to fill out + * @mode_cmd: metadata from the userspace fb creation request * - * RETURNS: - * Zero on success, errno on failure. + * This helper can be used in a drivers fb_create callback to pre-fill the fb's + * metadata fields. */ -int drm_helper_hotplug_stage_two(struct drm_device *dev) +void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, + struct drm_mode_fb_cmd2 *mode_cmd) { - drm_helper_plugged_event(dev); - - return 0; -} -EXPORT_SYMBOL(drm_helper_hotplug_stage_two); + int i; -int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb, - struct drm_mode_fb_cmd *mode_cmd) -{ fb->width = mode_cmd->width; fb->height = mode_cmd->height; - fb->pitch = mode_cmd->pitch; - fb->bits_per_pixel = mode_cmd->bpp; - fb->depth = mode_cmd->depth; - - return 0; + for (i = 0; i < 4; i++) { + fb->pitches[i] = mode_cmd->pitches[i]; + fb->offsets[i] = mode_cmd->offsets[i]; + } + drm_fb_get_bpp_depth(mode_cmd->pixel_format, &fb->depth, + &fb->bits_per_pixel); + fb->pixel_format = mode_cmd->pixel_format; } EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct); -int drm_helper_resume_force_mode(struct drm_device *dev) +/** + * drm_helper_resume_force_mode - force-restore mode setting configuration + * @dev: drm_device which should be restored + * + * Drivers which use the mode setting helpers can use this function to + * force-restore the mode setting configuration e.g. on resume or when something + * else might have trampled over the hw state (like some overzealous old BIOSen + * tended to do). + * + * This helper doesn't provide a error return value since restoring the old + * config should never fail due to resource allocation issues since the driver + * has successfully set the restored configuration already. Hence this should + * boil down to the equivalent of a few dpms on calls, which also don't provide + * an error code. + * + * Drivers where simply restoring an old configuration again might fail (e.g. + * due to slight differences in allocating shared resources when the + * configuration is restored in a different order than when userspace set it up) + * need to use their own restore logic. + */ +void drm_helper_resume_force_mode(struct drm_device *dev) { struct drm_crtc *crtc; - int ret; + struct drm_encoder *encoder; + struct drm_crtc_helper_funcs *crtc_funcs; + int encoder_dpms; + bool ret; + drm_modeset_lock_all(dev); list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { if (!crtc->enabled) continue; ret = drm_crtc_helper_set_mode(crtc, &crtc->mode, - crtc->x, crtc->y, crtc->fb); + crtc->x, crtc->y, crtc->primary->fb); + /* Restoring the old config should never fail! */ if (ret == false) DRM_ERROR("failed to set mode on crtc %p\n", crtc); + + /* Turn off outputs that were already powered off */ + if (drm_helper_choose_crtc_dpms(crtc)) { + list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { + + if(encoder->crtc != crtc) + continue; + + encoder_dpms = drm_helper_choose_encoder_dpms( + encoder); + + drm_helper_encoder_dpms(encoder, encoder_dpms); + } + + crtc_funcs = crtc->helper_private; + if (crtc_funcs->dpms) + (*crtc_funcs->dpms) (crtc, + drm_helper_choose_crtc_dpms(crtc)); + } } + /* disable the unused connectors while restoring the modesetting */ - drm_helper_disable_unused_functions(dev); - return 0; + __drm_helper_disable_unused_functions(dev); + drm_modeset_unlock_all(dev); } EXPORT_SYMBOL(drm_helper_resume_force_mode); |