diff options
Diffstat (limited to 'drivers/video/omap2/dss/apply.c')
| -rw-r--r-- | drivers/video/omap2/dss/apply.c | 1497 |
1 files changed, 1497 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c new file mode 100644 index 00000000..cb19af2d --- /dev/null +++ b/drivers/video/omap2/dss/apply.c @@ -0,0 +1,1497 @@ +/* + * Copyright (C) 2011 Texas Instruments + * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#define DSS_SUBSYS_NAME "APPLY" + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/jiffies.h> + +#include <video/omapdss.h> + +#include "dss.h" +#include "dss_features.h" + +/* + * We have 4 levels of cache for the dispc settings. First two are in SW and + * the latter two in HW. + * + * set_info() + * v + * +--------------------+ + * | user_info | + * +--------------------+ + * v + * apply() + * v + * +--------------------+ + * | info | + * +--------------------+ + * v + * write_regs() + * v + * +--------------------+ + * | shadow registers | + * +--------------------+ + * v + * VFP or lcd/digit_enable + * v + * +--------------------+ + * | registers | + * +--------------------+ + */ + +struct ovl_priv_data { + + bool user_info_dirty; + struct omap_overlay_info user_info; + + bool info_dirty; + struct omap_overlay_info info; + + bool shadow_info_dirty; + + bool extra_info_dirty; + bool shadow_extra_info_dirty; + + bool enabled; + enum omap_channel channel; + u32 fifo_low, fifo_high; + + /* + * True if overlay is to be enabled. Used to check and calculate configs + * for the overlay before it is enabled in the HW. + */ + bool enabling; +}; + +struct mgr_priv_data { + + bool user_info_dirty; + struct omap_overlay_manager_info user_info; + + bool info_dirty; + struct omap_overlay_manager_info info; + + bool shadow_info_dirty; + + /* If true, GO bit is up and shadow registers cannot be written. + * Never true for manual update displays */ + bool busy; + + /* If true, dispc output is enabled */ + bool updating; + + /* If true, a display is enabled using this manager */ + bool enabled; +}; + +static struct { + struct ovl_priv_data ovl_priv_data_array[MAX_DSS_OVERLAYS]; + struct mgr_priv_data mgr_priv_data_array[MAX_DSS_MANAGERS]; + + bool fifo_merge_dirty; + bool fifo_merge; + + bool irq_enabled; +} dss_data; + +/* protects dss_data */ +static spinlock_t data_lock; +/* lock for blocking functions */ +static DEFINE_MUTEX(apply_lock); +static DECLARE_COMPLETION(extra_updated_completion); + +static void dss_register_vsync_isr(void); + +static struct ovl_priv_data *get_ovl_priv(struct omap_overlay *ovl) +{ + return &dss_data.ovl_priv_data_array[ovl->id]; +} + +static struct mgr_priv_data *get_mgr_priv(struct omap_overlay_manager *mgr) +{ + return &dss_data.mgr_priv_data_array[mgr->id]; +} + +void dss_apply_init(void) +{ + const int num_ovls = dss_feat_get_num_ovls(); + int i; + + spin_lock_init(&data_lock); + + for (i = 0; i < num_ovls; ++i) { + struct ovl_priv_data *op; + + op = &dss_data.ovl_priv_data_array[i]; + + op->info.global_alpha = 255; + + switch (i) { + case 0: + op->info.zorder = 0; + break; + case 1: + op->info.zorder = + dss_has_feature(FEAT_ALPHA_FREE_ZORDER) ? 3 : 0; + break; + case 2: + op->info.zorder = + dss_has_feature(FEAT_ALPHA_FREE_ZORDER) ? 2 : 0; + break; + case 3: + op->info.zorder = + dss_has_feature(FEAT_ALPHA_FREE_ZORDER) ? 1 : 0; + break; + } + + op->user_info = op->info; + } +} + +static bool ovl_manual_update(struct omap_overlay *ovl) +{ + return ovl->manager->device->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE; +} + +static bool mgr_manual_update(struct omap_overlay_manager *mgr) +{ + return mgr->device->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE; +} + +static int dss_check_settings_low(struct omap_overlay_manager *mgr, + struct omap_dss_device *dssdev, bool applying) +{ + struct omap_overlay_info *oi; + struct omap_overlay_manager_info *mi; + struct omap_overlay *ovl; + struct omap_overlay_info *ois[MAX_DSS_OVERLAYS]; + struct ovl_priv_data *op; + struct mgr_priv_data *mp; + + mp = get_mgr_priv(mgr); + + if (applying && mp->user_info_dirty) + mi = &mp->user_info; + else + mi = &mp->info; + + /* collect the infos to be tested into the array */ + list_for_each_entry(ovl, &mgr->overlays, list) { + op = get_ovl_priv(ovl); + + if (!op->enabled && !op->enabling) + oi = NULL; + else if (applying && op->user_info_dirty) + oi = &op->user_info; + else + oi = &op->info; + + ois[ovl->id] = oi; + } + + return dss_mgr_check(mgr, dssdev, mi, ois); +} + +/* + * check manager and overlay settings using overlay_info from data->info + */ +static int dss_check_settings(struct omap_overlay_manager *mgr, + struct omap_dss_device *dssdev) +{ + return dss_check_settings_low(mgr, dssdev, false); +} + +/* + * check manager and overlay settings using overlay_info from ovl->info if + * dirty and from data->info otherwise + */ +static int dss_check_settings_apply(struct omap_overlay_manager *mgr, + struct omap_dss_device *dssdev) +{ + return dss_check_settings_low(mgr, dssdev, true); +} + +static bool need_isr(void) +{ + const int num_mgrs = dss_feat_get_num_mgrs(); + int i; + + for (i = 0; i < num_mgrs; ++i) { + struct omap_overlay_manager *mgr; + struct mgr_priv_data *mp; + struct omap_overlay *ovl; + + mgr = omap_dss_get_overlay_manager(i); + mp = get_mgr_priv(mgr); + + if (!mp->enabled) + continue; + + if (mgr_manual_update(mgr)) { + /* to catch FRAMEDONE */ + if (mp->updating) + return true; + } else { + /* to catch GO bit going down */ + if (mp->busy) + return true; + + /* to write new values to registers */ + if (mp->info_dirty) + return true; + + /* to set GO bit */ + if (mp->shadow_info_dirty) + return true; + + list_for_each_entry(ovl, &mgr->overlays, list) { + struct ovl_priv_data *op; + + op = get_ovl_priv(ovl); + + /* + * NOTE: we check extra_info flags even for + * disabled overlays, as extra_infos need to be + * always written. + */ + + /* to write new values to registers */ + if (op->extra_info_dirty) + return true; + + /* to set GO bit */ + if (op->shadow_extra_info_dirty) + return true; + + if (!op->enabled) + continue; + + /* to write new values to registers */ + if (op->info_dirty) + return true; + + /* to set GO bit */ + if (op->shadow_info_dirty) + return true; + } + } + } + + return false; +} + +static bool need_go(struct omap_overlay_manager *mgr) +{ + struct omap_overlay *ovl; + struct mgr_priv_data *mp; + struct ovl_priv_data *op; + + mp = get_mgr_priv(mgr); + + if (mp->shadow_info_dirty) + return true; + + list_for_each_entry(ovl, &mgr->overlays, list) { + op = get_ovl_priv(ovl); + if (op->shadow_info_dirty || op->shadow_extra_info_dirty) + return true; + } + + return false; +} + +/* returns true if an extra_info field is currently being updated */ +static bool extra_info_update_ongoing(void) +{ + const int num_ovls = omap_dss_get_num_overlays(); + struct ovl_priv_data *op; + struct omap_overlay *ovl; + struct mgr_priv_data *mp; + int i; + + for (i = 0; i < num_ovls; ++i) { + ovl = omap_dss_get_overlay(i); + op = get_ovl_priv(ovl); + + if (!ovl->manager) + continue; + + mp = get_mgr_priv(ovl->manager); + + if (!mp->enabled) + continue; + + if (!mp->updating) + continue; + + if (op->extra_info_dirty || op->shadow_extra_info_dirty) + return true; + } + + return false; +} + +/* wait until no extra_info updates are pending */ +static void wait_pending_extra_info_updates(void) +{ + bool updating; + unsigned long flags; + unsigned long t; + int r; + + spin_lock_irqsave(&data_lock, flags); + + updating = extra_info_update_ongoing(); + + if (!updating) { + spin_unlock_irqrestore(&data_lock, flags); + return; + } + + init_completion(&extra_updated_completion); + + spin_unlock_irqrestore(&data_lock, flags); + + t = msecs_to_jiffies(500); + r = wait_for_completion_timeout(&extra_updated_completion, t); + if (r == 0) + DSSWARN("timeout in wait_pending_extra_info_updates\n"); + else if (r < 0) + DSSERR("wait_pending_extra_info_updates failed: %d\n", r); +} + +int dss_mgr_wait_for_go(struct omap_overlay_manager *mgr) +{ + unsigned long timeout = msecs_to_jiffies(500); + struct mgr_priv_data *mp; + u32 irq; + int r; + int i; + struct omap_dss_device *dssdev = mgr->device; + + if (!dssdev || dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) + return 0; + + if (mgr_manual_update(mgr)) + return 0; + + r = dispc_runtime_get(); + if (r) + return r; + + irq = dispc_mgr_get_vsync_irq(mgr->id); + + mp = get_mgr_priv(mgr); + i = 0; + while (1) { + unsigned long flags; + bool shadow_dirty, dirty; + + spin_lock_irqsave(&data_lock, flags); + dirty = mp->info_dirty; + shadow_dirty = mp->shadow_info_dirty; + spin_unlock_irqrestore(&data_lock, flags); + + if (!dirty && !shadow_dirty) { + r = 0; + break; + } + + /* 4 iterations is the worst case: + * 1 - initial iteration, dirty = true (between VFP and VSYNC) + * 2 - first VSYNC, dirty = true + * 3 - dirty = false, shadow_dirty = true + * 4 - shadow_dirty = false */ + if (i++ == 3) { + DSSERR("mgr(%d)->wait_for_go() not finishing\n", + mgr->id); + r = 0; + break; + } + + r = omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout); + if (r == -ERESTARTSYS) + break; + + if (r) { + DSSERR("mgr(%d)->wait_for_go() timeout\n", mgr->id); + break; + } + } + + dispc_runtime_put(); + + return r; +} + +int dss_mgr_wait_for_go_ovl(struct omap_overlay *ovl) +{ + unsigned long timeout = msecs_to_jiffies(500); + struct ovl_priv_data *op; + struct omap_dss_device *dssdev; + u32 irq; + int r; + int i; + + if (!ovl->manager) + return 0; + + dssdev = ovl->manager->device; + + if (!dssdev || dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) + return 0; + + if (ovl_manual_update(ovl)) + return 0; + + r = dispc_runtime_get(); + if (r) + return r; + + irq = dispc_mgr_get_vsync_irq(ovl->manager->id); + + op = get_ovl_priv(ovl); + i = 0; + while (1) { + unsigned long flags; + bool shadow_dirty, dirty; + + spin_lock_irqsave(&data_lock, flags); + dirty = op->info_dirty; + shadow_dirty = op->shadow_info_dirty; + spin_unlock_irqrestore(&data_lock, flags); + + if (!dirty && !shadow_dirty) { + r = 0; + break; + } + + /* 4 iterations is the worst case: + * 1 - initial iteration, dirty = true (between VFP and VSYNC) + * 2 - first VSYNC, dirty = true + * 3 - dirty = false, shadow_dirty = true + * 4 - shadow_dirty = false */ + if (i++ == 3) { + DSSERR("ovl(%d)->wait_for_go() not finishing\n", + ovl->id); + r = 0; + break; + } + + r = omap_dispc_wait_for_irq_interruptible_timeout(irq, timeout); + if (r == -ERESTARTSYS) + break; + + if (r) { + DSSERR("ovl(%d)->wait_for_go() timeout\n", ovl->id); + break; + } + } + + dispc_runtime_put(); + + return r; +} + +static void dss_ovl_write_regs(struct omap_overlay *ovl) +{ + struct ovl_priv_data *op = get_ovl_priv(ovl); + struct omap_overlay_info *oi; + bool ilace, replication; + struct mgr_priv_data *mp; + int r; + + DSSDBGF("%d", ovl->id); + + if (!op->enabled || !op->info_dirty) + return; + + oi = &op->info; + + replication = dss_use_replication(ovl->manager->device, oi->color_mode); + + ilace = ovl->manager->device->type == OMAP_DISPLAY_TYPE_VENC; + + r = dispc_ovl_setup(ovl->id, oi, ilace, replication); + if (r) { + /* + * We can't do much here, as this function can be called from + * vsync interrupt. + */ + DSSERR("dispc_ovl_setup failed for ovl %d\n", ovl->id); + + /* This will leave fifo configurations in a nonoptimal state */ + op->enabled = false; + dispc_ovl_enable(ovl->id, false); + return; + } + + mp = get_mgr_priv(ovl->manager); + + op->info_dirty = false; + if (mp->updating) + op->shadow_info_dirty = true; +} + +static void dss_ovl_write_regs_extra(struct omap_overlay *ovl) +{ + struct ovl_priv_data *op = get_ovl_priv(ovl); + struct mgr_priv_data *mp; + + DSSDBGF("%d", ovl->id); + + if (!op->extra_info_dirty) + return; + + /* note: write also when op->enabled == false, so that the ovl gets + * disabled */ + + dispc_ovl_enable(ovl->id, op->enabled); + dispc_ovl_set_channel_out(ovl->id, op->channel); + dispc_ovl_set_fifo_threshold(ovl->id, op->fifo_low, op->fifo_high); + + mp = get_mgr_priv(ovl->manager); + + op->extra_info_dirty = false; + if (mp->updating) + op->shadow_extra_info_dirty = true; +} + +static void dss_mgr_write_regs(struct omap_overlay_manager *mgr) +{ + struct mgr_priv_data *mp = get_mgr_priv(mgr); + struct omap_overlay *ovl; + + DSSDBGF("%d", mgr->id); + + if (!mp->enabled) + return; + + WARN_ON(mp->busy); + + /* Commit overlay settings */ + list_for_each_entry(ovl, &mgr->overlays, list) { + dss_ovl_write_regs(ovl); + dss_ovl_write_regs_extra(ovl); + } + + if (mp->info_dirty) { + dispc_mgr_setup(mgr->id, &mp->info); + + mp->info_dirty = false; + if (mp->updating) + mp->shadow_info_dirty = true; + } +} + +static void dss_write_regs_common(void) +{ + const int num_mgrs = omap_dss_get_num_overlay_managers(); + int i; + + if (!dss_data.fifo_merge_dirty) + return; + + for (i = 0; i < num_mgrs; ++i) { + struct omap_overlay_manager *mgr; + struct mgr_priv_data *mp; + + mgr = omap_dss_get_overlay_manager(i); + mp = get_mgr_priv(mgr); + + if (mp->enabled) { + if (dss_data.fifo_merge_dirty) { + dispc_enable_fifomerge(dss_data.fifo_merge); + dss_data.fifo_merge_dirty = false; + } + + if (mp->updating) + mp->shadow_info_dirty = true; + } + } +} + +static void dss_write_regs(void) +{ + const int num_mgrs = omap_dss_get_num_overlay_managers(); + int i; + + dss_write_regs_common(); + + for (i = 0; i < num_mgrs; ++i) { + struct omap_overlay_manager *mgr; + struct mgr_priv_data *mp; + int r; + + mgr = omap_dss_get_overlay_manager(i); + mp = get_mgr_priv(mgr); + + if (!mp->enabled || mgr_manual_update(mgr) || mp->busy) + continue; + + r = dss_check_settings(mgr, mgr->device); + if (r) { + DSSERR("cannot write registers for manager %s: " + "illegal configuration\n", mgr->name); + continue; + } + + dss_mgr_write_regs(mgr); + } +} + +static void dss_set_go_bits(void) +{ + const int num_mgrs = omap_dss_get_num_overlay_managers(); + int i; + + for (i = 0; i < num_mgrs; ++i) { + struct omap_overlay_manager *mgr; + struct mgr_priv_data *mp; + + mgr = omap_dss_get_overlay_manager(i); + mp = get_mgr_priv(mgr); + + if (!mp->enabled || mgr_manual_update(mgr) || mp->busy) + continue; + + if (!need_go(mgr)) + continue; + + mp->busy = true; + + if (!dss_data.irq_enabled && need_isr()) + dss_register_vsync_isr(); + + dispc_mgr_go(mgr->id); + } + +} + +static void mgr_clear_shadow_dirty(struct omap_overlay_manager *mgr) +{ + struct omap_overlay *ovl; + struct mgr_priv_data *mp; + struct ovl_priv_data *op; + + mp = get_mgr_priv(mgr); + mp->shadow_info_dirty = false; + + list_for_each_entry(ovl, &mgr->overlays, list) { + op = get_ovl_priv(ovl); + op->shadow_info_dirty = false; + op->shadow_extra_info_dirty = false; + } +} + +void dss_mgr_start_update(struct omap_overlay_manager *mgr) +{ + struct mgr_priv_data *mp = get_mgr_priv(mgr); + unsigned long flags; + int r; + + spin_lock_irqsave(&data_lock, flags); + + WARN_ON(mp->updating); + + r = dss_check_settings(mgr, mgr->device); + if (r) { + DSSERR("cannot start manual update: illegal configuration\n"); + spin_unlock_irqrestore(&data_lock, flags); + return; + } + + dss_mgr_write_regs(mgr); + + dss_write_regs_common(); + + mp->updating = true; + + if (!dss_data.irq_enabled && need_isr()) + dss_register_vsync_isr(); + + dispc_mgr_enable(mgr->id, true); + + mgr_clear_shadow_dirty(mgr); + + spin_unlock_irqrestore(&data_lock, flags); +} + +static void dss_apply_irq_handler(void *data, u32 mask); + +static void dss_register_vsync_isr(void) +{ + const int num_mgrs = dss_feat_get_num_mgrs(); + u32 mask; + int r, i; + + mask = 0; + for (i = 0; i < num_mgrs; ++i) + mask |= dispc_mgr_get_vsync_irq(i); + + for (i = 0; i < num_mgrs; ++i) + mask |= dispc_mgr_get_framedone_irq(i); + + r = omap_dispc_register_isr(dss_apply_irq_handler, NULL, mask); + WARN_ON(r); + + dss_data.irq_enabled = true; +} + +static void dss_unregister_vsync_isr(void) +{ + const int num_mgrs = dss_feat_get_num_mgrs(); + u32 mask; + int r, i; + + mask = 0; + for (i = 0; i < num_mgrs; ++i) + mask |= dispc_mgr_get_vsync_irq(i); + + for (i = 0; i < num_mgrs; ++i) + mask |= dispc_mgr_get_framedone_irq(i); + + r = omap_dispc_unregister_isr(dss_apply_irq_handler, NULL, mask); + WARN_ON(r); + + dss_data.irq_enabled = false; +} + +static void dss_apply_irq_handler(void *data, u32 mask) +{ + const int num_mgrs = dss_feat_get_num_mgrs(); + int i; + bool extra_updating; + + spin_lock(&data_lock); + + /* clear busy, updating flags, shadow_dirty flags */ + for (i = 0; i < num_mgrs; i++) { + struct omap_overlay_manager *mgr; + struct mgr_priv_data *mp; + bool was_updating; + + mgr = omap_dss_get_overlay_manager(i); + mp = get_mgr_priv(mgr); + + if (!mp->enabled) + continue; + + was_updating = mp->updating; + mp->updating = dispc_mgr_is_enabled(i); + + if (!mgr_manual_update(mgr)) { + bool was_busy = mp->busy; + mp->busy = dispc_mgr_go_busy(i); + + if (was_busy && !mp->busy) + mgr_clear_shadow_dirty(mgr); + } + } + + dss_write_regs(); + dss_set_go_bits(); + + extra_updating = extra_info_update_ongoing(); + if (!extra_updating) + complete_all(&extra_updated_completion); + + if (!need_isr()) + dss_unregister_vsync_isr(); + + spin_unlock(&data_lock); +} + +static void omap_dss_mgr_apply_ovl(struct omap_overlay *ovl) +{ + struct ovl_priv_data *op; + + op = get_ovl_priv(ovl); + + if (!op->user_info_dirty) + return; + + op->user_info_dirty = false; + op->info_dirty = true; + op->info = op->user_info; +} + +static void omap_dss_mgr_apply_mgr(struct omap_overlay_manager *mgr) +{ + struct mgr_priv_data *mp; + + mp = get_mgr_priv(mgr); + + if (!mp->user_info_dirty) + return; + + mp->user_info_dirty = false; + mp->info_dirty = true; + mp->info = mp->user_info; +} + +int omap_dss_mgr_apply(struct omap_overlay_manager *mgr) +{ + unsigned long flags; + struct omap_overlay *ovl; + int r; + + DSSDBG("omap_dss_mgr_apply(%s)\n", mgr->name); + + spin_lock_irqsave(&data_lock, flags); + + r = dss_check_settings_apply(mgr, mgr->device); + if (r) { + spin_unlock_irqrestore(&data_lock, flags); + DSSERR("failed to apply settings: illegal configuration.\n"); + return r; + } + + /* Configure overlays */ + list_for_each_entry(ovl, &mgr->overlays, list) + omap_dss_mgr_apply_ovl(ovl); + + /* Configure manager */ + omap_dss_mgr_apply_mgr(mgr); + + dss_write_regs(); + dss_set_go_bits(); + + spin_unlock_irqrestore(&data_lock, flags); + + return 0; +} + +static void dss_apply_ovl_enable(struct omap_overlay *ovl, bool enable) +{ + struct ovl_priv_data *op; + + op = get_ovl_priv(ovl); + + if (op->enabled == enable) + return; + + op->enabled = enable; + op->extra_info_dirty = true; +} + +static void dss_apply_ovl_fifo_thresholds(struct omap_overlay *ovl, + u32 fifo_low, u32 fifo_high) +{ + struct ovl_priv_data *op = get_ovl_priv(ovl); + + if (op->fifo_low == fifo_low && op->fifo_high == fifo_high) + return; + + op->fifo_low = fifo_low; + op->fifo_high = fifo_high; + op->extra_info_dirty = true; +} + +static void dss_apply_fifo_merge(bool use_fifo_merge) +{ + if (dss_data.fifo_merge == use_fifo_merge) + return; + + dss_data.fifo_merge = use_fifo_merge; + dss_data.fifo_merge_dirty = true; +} + +static void dss_ovl_setup_fifo(struct omap_overlay *ovl, + bool use_fifo_merge) +{ + struct ovl_priv_data *op = get_ovl_priv(ovl); + struct omap_dss_device *dssdev; + u32 fifo_low, fifo_high; + + if (!op->enabled && !op->enabling) + return; + + dssdev = ovl->manager->device; + + dispc_ovl_compute_fifo_thresholds(ovl->id, &fifo_low, &fifo_high, + use_fifo_merge, ovl_manual_update(ovl)); + + dss_apply_ovl_fifo_thresholds(ovl, fifo_low, fifo_high); +} + +static void dss_mgr_setup_fifos(struct omap_overlay_manager *mgr, + bool use_fifo_merge) +{ + struct omap_overlay *ovl; + struct mgr_priv_data *mp; + + mp = get_mgr_priv(mgr); + + if (!mp->enabled) + return; + + list_for_each_entry(ovl, &mgr->overlays, list) + dss_ovl_setup_fifo(ovl, use_fifo_merge); +} + +static void dss_setup_fifos(bool use_fifo_merge) +{ + const int num_mgrs = omap_dss_get_num_overlay_managers(); + struct omap_overlay_manager *mgr; + int i; + + for (i = 0; i < num_mgrs; ++i) { + mgr = omap_dss_get_overlay_manager(i); + dss_mgr_setup_fifos(mgr, use_fifo_merge); + } +} + +static int get_num_used_managers(void) +{ + const int num_mgrs = omap_dss_get_num_overlay_managers(); + struct omap_overlay_manager *mgr; + struct mgr_priv_data *mp; + int i; + int enabled_mgrs; + + enabled_mgrs = 0; + + for (i = 0; i < num_mgrs; ++i) { + mgr = omap_dss_get_overlay_manager(i); + mp = get_mgr_priv(mgr); + + if (!mp->enabled) + continue; + + enabled_mgrs++; + } + + return enabled_mgrs; +} + +static int get_num_used_overlays(void) +{ + const int num_ovls = omap_dss_get_num_overlays(); + struct omap_overlay *ovl; + struct ovl_priv_data *op; + struct mgr_priv_data *mp; + int i; + int enabled_ovls; + + enabled_ovls = 0; + + for (i = 0; i < num_ovls; ++i) { + ovl = omap_dss_get_overlay(i); + op = get_ovl_priv(ovl); + + if (!op->enabled && !op->enabling) + continue; + + mp = get_mgr_priv(ovl->manager); + + if (!mp->enabled) + continue; + + enabled_ovls++; + } + + return enabled_ovls; +} + +static bool get_use_fifo_merge(void) +{ + int enabled_mgrs = get_num_used_managers(); + int enabled_ovls = get_num_used_overlays(); + + if (!dss_has_feature(FEAT_FIFO_MERGE)) + return false; + + /* + * In theory the only requirement for fifomerge is enabled_ovls <= 1. + * However, if we have two managers enabled and set/unset the fifomerge, + * we need to set the GO bits in particular sequence for the managers, + * and wait in between. + * + * This is rather difficult as new apply calls can happen at any time, + * so we simplify the problem by requiring also that enabled_mgrs <= 1. + * In practice this shouldn't matter, because when only one overlay is + * enabled, most likely only one output is enabled. + */ + + return enabled_mgrs <= 1 && enabled_ovls <= 1; +} + +int dss_mgr_enable(struct omap_overlay_manager *mgr) +{ + struct mgr_priv_data *mp = get_mgr_priv(mgr); + unsigned long flags; + int r; + bool fifo_merge; + + mutex_lock(&apply_lock); + + if (mp->enabled) + goto out; + + spin_lock_irqsave(&data_lock, flags); + + mp->enabled = true; + + r = dss_check_settings(mgr, mgr->device); + if (r) { + DSSERR("failed to enable manager %d: check_settings failed\n", + mgr->id); + goto err; + } + + /* step 1: setup fifos/fifomerge before enabling the manager */ + + fifo_merge = get_use_fifo_merge(); + dss_setup_fifos(fifo_merge); + dss_apply_fifo_merge(fifo_merge); + + dss_write_regs(); + dss_set_go_bits(); + + spin_unlock_irqrestore(&data_lock, flags); + + /* wait until fifo config is in */ + wait_pending_extra_info_updates(); + + /* step 2: enable the manager */ + spin_lock_irqsave(&data_lock, flags); + + if (!mgr_manual_update(mgr)) + mp->updating = true; + + spin_unlock_irqrestore(&data_lock, flags); + + if (!mgr_manual_update(mgr)) + dispc_mgr_enable(mgr->id, true); + +out: + mutex_unlock(&apply_lock); + + return 0; + +err: + mp->enabled = false; + spin_unlock_irqrestore(&data_lock, flags); + mutex_unlock(&apply_lock); + return r; +} + +void dss_mgr_disable(struct omap_overlay_manager *mgr) +{ + struct mgr_priv_data *mp = get_mgr_priv(mgr); + unsigned long flags; + bool fifo_merge; + + mutex_lock(&apply_lock); + + if (!mp->enabled) + goto out; + + if (!mgr_manual_update(mgr)) + dispc_mgr_enable(mgr->id, false); + + spin_lock_irqsave(&data_lock, flags); + + mp->updating = false; + mp->enabled = false; + + fifo_merge = get_use_fifo_merge(); + dss_setup_fifos(fifo_merge); + dss_apply_fifo_merge(fifo_merge); + + dss_write_regs(); + dss_set_go_bits(); + + spin_unlock_irqrestore(&data_lock, flags); + + wait_pending_extra_info_updates(); +out: + mutex_unlock(&apply_lock); +} + +int dss_mgr_set_info(struct omap_overlay_manager *mgr, + struct omap_overlay_manager_info *info) +{ + struct mgr_priv_data *mp = get_mgr_priv(mgr); + unsigned long flags; + int r; + + r = dss_mgr_simple_check(mgr, info); + if (r) + return r; + + spin_lock_irqsave(&data_lock, flags); + + mp->user_info = *info; + mp->user_info_dirty = true; + + spin_unlock_irqrestore(&data_lock, flags); + + return 0; +} + +void dss_mgr_get_info(struct omap_overlay_manager *mgr, + struct omap_overlay_manager_info *info) +{ + struct mgr_priv_data *mp = get_mgr_priv(mgr); + unsigned long flags; + + spin_lock_irqsave(&data_lock, flags); + + *info = mp->user_info; + + spin_unlock_irqrestore(&data_lock, flags); +} + +int dss_mgr_set_device(struct omap_overlay_manager *mgr, + struct omap_dss_device *dssdev) +{ + int r; + + mutex_lock(&apply_lock); + + if (dssdev->manager) { + DSSERR("display '%s' already has a manager '%s'\n", + dssdev->name, dssdev->manager->name); + r = -EINVAL; + goto err; + } + + if ((mgr->supported_displays & dssdev->type) == 0) { + DSSERR("display '%s' does not support manager '%s'\n", + dssdev->name, mgr->name); + r = -EINVAL; + goto err; + } + + dssdev->manager = mgr; + mgr->device = dssdev; + + mutex_unlock(&apply_lock); + + return 0; +err: + mutex_unlock(&apply_lock); + return r; +} + +int dss_mgr_unset_device(struct omap_overlay_manager *mgr) +{ + int r; + + mutex_lock(&apply_lock); + + if (!mgr->device) { + DSSERR("failed to unset display, display not set.\n"); + r = -EINVAL; + goto err; + } + + /* + * Don't allow currently enabled displays to have the overlay manager + * pulled out from underneath them + */ + if (mgr->device->state != OMAP_DSS_DISPLAY_DISABLED) { + r = -EINVAL; + goto err; + } + + mgr->device->manager = NULL; + mgr->device = NULL; + + mutex_unlock(&apply_lock); + + return 0; +err: + mutex_unlock(&apply_lock); + return r; +} + + +int dss_ovl_set_info(struct omap_overlay *ovl, + struct omap_overlay_info *info) +{ + struct ovl_priv_data *op = get_ovl_priv(ovl); + unsigned long flags; + int r; + + r = dss_ovl_simple_check(ovl, info); + if (r) + return r; + + spin_lock_irqsave(&data_lock, flags); + + op->user_info = *info; + op->user_info_dirty = true; + + spin_unlock_irqrestore(&data_lock, flags); + + return 0; +} + +void dss_ovl_get_info(struct omap_overlay *ovl, + struct omap_overlay_info *info) +{ + struct ovl_priv_data *op = get_ovl_priv(ovl); + unsigned long flags; + + spin_lock_irqsave(&data_lock, flags); + + *info = op->user_info; + + spin_unlock_irqrestore(&data_lock, flags); +} + +int dss_ovl_set_manager(struct omap_overlay *ovl, + struct omap_overlay_manager *mgr) +{ + struct ovl_priv_data *op = get_ovl_priv(ovl); + unsigned long flags; + int r; + + if (!mgr) + return -EINVAL; + + mutex_lock(&apply_lock); + + if (ovl->manager) { + DSSERR("overlay '%s' already has a manager '%s'\n", + ovl->name, ovl->manager->name); + r = -EINVAL; + goto err; + } + + spin_lock_irqsave(&data_lock, flags); + + if (op->enabled) { + spin_unlock_irqrestore(&data_lock, flags); + DSSERR("overlay has to be disabled to change the manager\n"); + r = -EINVAL; + goto err; + } + + op->channel = mgr->id; + op->extra_info_dirty = true; + + ovl->manager = mgr; + list_add_tail(&ovl->list, &mgr->overlays); + + spin_unlock_irqrestore(&data_lock, flags); + + /* XXX: When there is an overlay on a DSI manual update display, and + * the overlay is first disabled, then moved to tv, and enabled, we + * seem to get SYNC_LOST_DIGIT error. + * + * Waiting doesn't seem to help, but updating the manual update display + * after disabling the overlay seems to fix this. This hints that the + * overlay is perhaps somehow tied to the LCD output until the output + * is updated. + * + * Userspace workaround for this is to update the LCD after disabling + * the overlay, but before moving the overlay to TV. + */ + + mutex_unlock(&apply_lock); + + return 0; +err: + mutex_unlock(&apply_lock); + return r; +} + +int dss_ovl_unset_manager(struct omap_overlay *ovl) +{ + struct ovl_priv_data *op = get_ovl_priv(ovl); + unsigned long flags; + int r; + + mutex_lock(&apply_lock); + + if (!ovl->manager) { + DSSERR("failed to detach overlay: manager not set\n"); + r = -EINVAL; + goto err; + } + + spin_lock_irqsave(&data_lock, flags); + + if (op->enabled) { + spin_unlock_irqrestore(&data_lock, flags); + DSSERR("overlay has to be disabled to unset the manager\n"); + r = -EINVAL; + goto err; + } + + op->channel = -1; + + ovl->manager = NULL; + list_del(&ovl->list); + + spin_unlock_irqrestore(&data_lock, flags); + + mutex_unlock(&apply_lock); + + return 0; +err: + mutex_unlock(&apply_lock); + return r; +} + +bool dss_ovl_is_enabled(struct omap_overlay *ovl) +{ + struct ovl_priv_data *op = get_ovl_priv(ovl); + unsigned long flags; + bool e; + + spin_lock_irqsave(&data_lock, flags); + + e = op->enabled; + + spin_unlock_irqrestore(&data_lock, flags); + + return e; +} + +int dss_ovl_enable(struct omap_overlay *ovl) +{ + struct ovl_priv_data *op = get_ovl_priv(ovl); + unsigned long flags; + bool fifo_merge; + int r; + + mutex_lock(&apply_lock); + + if (op->enabled) { + r = 0; + goto err1; + } + + if (ovl->manager == NULL || ovl->manager->device == NULL) { + r = -EINVAL; + goto err1; + } + + spin_lock_irqsave(&data_lock, flags); + + op->enabling = true; + + r = dss_check_settings(ovl->manager, ovl->manager->device); + if (r) { + DSSERR("failed to enable overlay %d: check_settings failed\n", + ovl->id); + goto err2; + } + + /* step 1: configure fifos/fifomerge for currently enabled ovls */ + + fifo_merge = get_use_fifo_merge(); + dss_setup_fifos(fifo_merge); + dss_apply_fifo_merge(fifo_merge); + + dss_write_regs(); + dss_set_go_bits(); + + spin_unlock_irqrestore(&data_lock, flags); + + /* wait for fifo configs to go in */ + wait_pending_extra_info_updates(); + + /* step 2: enable the overlay */ + spin_lock_irqsave(&data_lock, flags); + + op->enabling = false; + dss_apply_ovl_enable(ovl, true); + + dss_write_regs(); + dss_set_go_bits(); + + spin_unlock_irqrestore(&data_lock, flags); + + /* wait for overlay to be enabled */ + wait_pending_extra_info_updates(); + + mutex_unlock(&apply_lock); + + return 0; +err2: + op->enabling = false; + spin_unlock_irqrestore(&data_lock, flags); +err1: + mutex_unlock(&apply_lock); + return r; +} + +int dss_ovl_disable(struct omap_overlay *ovl) +{ + struct ovl_priv_data *op = get_ovl_priv(ovl); + unsigned long flags; + bool fifo_merge; + int r; + + mutex_lock(&apply_lock); + + if (!op->enabled) { + r = 0; + goto err; + } + + if (ovl->manager == NULL || ovl->manager->device == NULL) { + r = -EINVAL; + goto err; + } + + /* step 1: disable the overlay */ + spin_lock_irqsave(&data_lock, flags); + + dss_apply_ovl_enable(ovl, false); + + dss_write_regs(); + dss_set_go_bits(); + + spin_unlock_irqrestore(&data_lock, flags); + + /* wait for the overlay to be disabled */ + wait_pending_extra_info_updates(); + + /* step 2: configure fifos/fifomerge */ + spin_lock_irqsave(&data_lock, flags); + + fifo_merge = get_use_fifo_merge(); + dss_setup_fifos(fifo_merge); + dss_apply_fifo_merge(fifo_merge); + + dss_write_regs(); + dss_set_go_bits(); + + spin_unlock_irqrestore(&data_lock, flags); + + /* wait for fifo config to go in */ + wait_pending_extra_info_updates(); + + mutex_unlock(&apply_lock); + + return 0; + +err: + mutex_unlock(&apply_lock); + return r; +} + |