/* * drivers/gpu/drm/omapdrm/omap_crtc.c * * Copyright (C) 2011 Texas Instruments * Author: Rob Clark * * 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 . */ #include #include #include #include #include #include #include "omap_drv.h" #define to_omap_crtc_state(x) container_of(x, struct omap_crtc_state, base) struct omap_crtc_state { /* Must be first. */ struct drm_crtc_state base; /* Shadow values for legacy userspace support. */ unsigned int rotation; unsigned int zpos; }; #define to_omap_crtc(x) container_of(x, struct omap_crtc, base) struct omap_crtc { struct drm_crtc base; const char *name; enum omap_channel channel; struct videomode vm; bool ignore_digit_sync_lost; bool enabled; bool pending; wait_queue_head_t pending_wait; struct drm_pending_vblank_event *event; }; /* ----------------------------------------------------------------------------- * Helper Functions */ struct videomode *omap_crtc_timings(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); return &omap_crtc->vm; } enum omap_channel omap_crtc_channel(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); return omap_crtc->channel; } static bool omap_crtc_is_pending(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); unsigned long flags; bool pending; spin_lock_irqsave(&crtc->dev->event_lock, flags); pending = omap_crtc->pending; spin_unlock_irqrestore(&crtc->dev->event_lock, flags); return pending; } int omap_crtc_wait_pending(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); /* * Timeout is set to a "sufficiently" high value, which should cover * a single frame refresh even on slower displays. */ return wait_event_timeout(omap_crtc->pending_wait, !omap_crtc_is_pending(crtc), msecs_to_jiffies(250)); } /* ----------------------------------------------------------------------------- * DSS Manager Functions */ /* * Manager-ops, callbacks from output when they need to configure * the upstream part of the video pipe. * * Most of these we can ignore until we add support for command-mode * panels.. for video-mode the crtc-helpers already do an adequate * job of sequencing the setup of the video pipe in the proper order */ /* ovl-mgr-id -> crtc */ static struct omap_crtc *omap_crtcs[8]; static struct omap_dss_device *omap_crtc_output[8]; /* we can probably ignore these until we support command-mode panels: */ static int omap_crtc_dss_connect(enum omap_channel channel, struct omap_dss_device *dst) { const struct dispc_ops *dispc_ops = dispc_get_ops(); if (omap_crtc_output[channel]) return -EINVAL; if ((dispc_ops->mgr_get_supported_outputs(channel) & dst->id) == 0) return -EINVAL; omap_crtc_output[channel] = dst; dst->dispc_channel_connected = true; return 0; } static void omap_crtc_dss_disconnect(enum omap_channel channel, struct omap_dss_device *dst) { omap_crtc_output[channel] = NULL; dst->dispc_channel_connected = false; } static void omap_crtc_dss_start_update(enum omap_channel channel) { } /* Called only from the encoder enable/disable and suspend/resume handlers. */ static void omap_crtc_set_enabled(struct drm_crtc *crtc, bool enable) { struct drm_device *dev = crtc->dev; struct omap_drm_private *priv = dev->dev_private; struct omap_crtc *omap_crtc = to_omap_crtc(crtc); enum omap_channel channel = omap_crtc->channel; struct omap_irq_wait *wait; u32 framedone_irq, vsync_irq; int ret; if (WARN_ON(omap_crtc->enabled == enable)) return; if (omap_crtc_output[channel]->output_type == OMAP_DISPLAY_TYPE_HDMI) { priv->dispc_ops->mgr_enable(channel, enable); omap_crtc->enabled = enable; return; } if (omap_crtc->channel == OMAP_DSS_CHANNEL_DIGIT) { /* * Digit output produces some sync lost interrupts during the * first frame when enabling, so we need to ignore those. */ omap_crtc->ignore_digit_sync_lost = true; } framedone_irq = priv->dispc_ops->mgr_get_framedone_irq(channel); vsync_irq = priv->dispc_ops->mgr_get_vsync_irq(channel); if (enable) { wait = omap_irq_wait_init(dev, vsync_irq, 1); } else { /* * When we disable the digit output, we need to wait for * FRAMEDONE to know that DISPC has finished with the output. * * OMAP2/3 does not have FRAMEDONE irq for digit output, and in * that case we need to use vsync interrupt, and wait for both * even and odd frames. */ if (framedone_irq) wait = omap_irq_wait_init(dev, framedone_irq, 1); else wait = omap_irq_wait_init(dev, vsync_irq, 2); } priv->dispc_ops->mgr_enable(channel, enable); omap_crtc->enabled = enable; ret = omap_irq_wait(dev, wait, msecs_to_jiffies(100)); if (ret) { dev_err(dev->dev, "%s: timeout waiting for %s\n", omap_crtc->name, enable ? "enable" : "disable"); } if (omap_crtc->channel == OMAP_DSS_CHANNEL_DIGIT) { omap_crtc->ignore_digit_sync_lost = false; /* make sure the irq handler sees the value above */ mb(); } } static int omap_crtc_dss_enable(enum omap_channel channel) { struct omap_crtc *omap_crtc = omap_crtcs[channel]; struct omap_drm_private *priv = omap_crtc->base.dev->dev_private; priv->dispc_ops->mgr_set_timings(omap_crtc->channel, &omap_crtc->vm); omap_crtc_set_enabled(&omap_crtc->base, true); return 0; } static void omap_crtc_dss_disable(enum omap_channel channel) { struct omap_crtc *omap_crtc = omap_crtcs[channel]; omap_crtc_set_enabled(&omap_crtc->base, false); } static void omap_crtc_dss_set_timings(enum omap_channel channel, const struct videomode *vm) { struct omap_crtc *omap_crtc = omap_crtcs[channel]; DBG("%s", omap_crtc->name); omap_crtc->vm = *vm; } static void omap_crtc_dss_set_lcd_config(enum omap_channel channel, const struct dss_lcd_mgr_config *config) { struct omap_crtc *omap_crtc = omap_crtcs[channel]; struct omap_drm_private *priv = omap_crtc->base.dev->dev_private; DBG("%s", omap_crtc->name); priv->dispc_ops->mgr_set_lcd_config(omap_crtc->channel, config); } static int omap_crtc_dss_register_framedone( enum omap_channel channel, void (*handler)(void *), void *data) { return 0; } static void omap_crtc_dss_unregister_framedone( enum omap_channel channel, void (*handler)(void *), void *data) { } static const struct dss_mgr_ops mgr_ops = { .connect = omap_crtc_dss_connect, .disconnect = omap_crtc_dss_disconnect, .start_update = omap_crtc_dss_start_update, .enable = omap_crtc_dss_enable, .disable = omap_crtc_dss_disable, .set_timings = omap_crtc_dss_set_timings, .set_lcd_config = omap_crtc_dss_set_lcd_config, .register_framedone_handler = omap_crtc_dss_register_framedone, .unregister_framedone_handler = omap_crtc_dss_unregister_framedone, }; /* ----------------------------------------------------------------------------- * Setup, Flush and Page Flip */ void omap_crtc_error_irq(struct drm_crtc *crtc, uint32_t irqstatus) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); if (omap_crtc->ignore_digit_sync_lost) { irqstatus &= ~DISPC_IRQ_SYNC_LOST_DIGIT; if (!irqstatus) return; } DRM_ERROR_RATELIMITED("%s: errors: %08x\n", omap_crtc->name, irqstatus); } void omap_crtc_vblank_irq(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); struct drm_device *dev = omap_crtc->base.dev; struct omap_drm_private *priv = dev->dev_private; bool pending; spin_lock(&crtc->dev->event_lock); /* * If the dispc is busy we're racing the flush operation. Try again on * the next vblank interrupt. */ if (priv->dispc_ops->mgr_go_busy(omap_crtc->channel)) { spin_unlock(&crtc->dev->event_lock); return; } /* Send the vblank event if one has been requested. */ if (omap_crtc->event) { drm_crtc_send_vblank_event(crtc, omap_crtc->event); omap_crtc->event = NULL; } pending = omap_crtc->pending; omap_crtc->pending = false; spin_unlock(&crtc->dev->event_lock); if (pending) drm_crtc_vblank_put(crtc); /* Wake up omap_atomic_complete. */ wake_up(&omap_crtc->pending_wait); DBG("%s: apply done", omap_crtc->name); } static void omap_crtc_write_crtc_properties(struct drm_crtc *crtc) { struct omap_drm_private *priv = crtc->dev->dev_private; struct omap_crtc *omap_crtc = to_omap_crtc(crtc); struct omap_overlay_manager_info info; memset(&info, 0, sizeof(info)); info.default_color = 0x000000; info.trans_enabled = false; info.partial_alpha_enabled = false; info.cpr_enable = false; priv->dispc_ops->mgr_setup(omap_crtc->channel, &info); } /* ----------------------------------------------------------------------------- * CRTC Functions */ static void omap_crtc_destroy(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); DBG("%s", omap_crtc->name); drm_crtc_cleanup(crtc); kfree(omap_crtc); } static void omap_crtc_arm_event(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); WARN_ON(omap_crtc->pending); omap_crtc->pending = true; if (crtc->state->event) { omap_crtc->event = crtc->state->event; crtc->state->event = NULL; } } static void omap_crtc_atomic_enable(struct drm_crtc *crtc, struct drm_crtc_state *old_state) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); int ret; DBG("%s", omap_crtc->name); spin_lock_irq(&crtc->dev->event_lock); drm_crtc_vblank_on(crtc); ret = drm_crtc_vblank_get(crtc); WARN_ON(ret != 0); omap_crtc_arm_event(crtc); spin_unlock_irq(&crtc->dev->event_lock); } static void omap_crtc_atomic_disable(struct drm_crtc *crtc, struct drm_crtc_state *old_state) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); DBG("%s", omap_crtc->name); spin_lock_irq(&crtc->dev->event_lock); if (crtc->state->event) { drm_crtc_send_vblank_event(crtc, crtc->state->event); crtc->state->event = NULL; } spin_unlock_irq(&crtc->dev->event_lock); drm_crtc_vblank_off(crtc); } static void omap_crtc_mode_set_nofb(struct drm_crtc *crtc) { struct omap_crtc *omap_crtc = to_omap_crtc(crtc); struct drm_display_mode *mode = &crtc->state->adjusted_mode; struct omap_drm_private *priv = crtc->dev->dev_private; const u32 flags_mask = DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_DE_LOW | DISPLAY_FLAGS_PIXDATA_POSEDGE | DISPLAY_FLAGS_PIXDATA_NEGEDGE | DISPLAY_FLAGS_SYNC_POSEDGE | DISPLAY_FLAGS_SYNC_NEGEDGE; unsigned int i; DBG("%s: set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x", omap_crtc->name, mode->base.id, mode->name, mode->vrefresh, mode->clock, mode->hdisplay, mode->hsync_start, mode->hsync_end, mode->htotal, mode->vdisplay, mode->vsync_start, mode->vsync_end, mode->vtotal, mode->type, mode->flags); drm_display_mode_to_videomode(mode, &omap_crtc->vm); /* * HACK: This fixes the vm flags. * struct drm_display_mode does not contain the VSYNC/HSYNC/DE flags * and they get lost when converting back and forth between * struct drm_display_mode and struct videomode. The hack below * goes and fetches the missing flags from the panel drivers. * * Correct solution would be to use DRM's bus-flags, but that's not * easily possible before the omapdrm's panel/encoder driver model * has been changed to the DRM model. */ for (i = 0; i < priv->num_encoders; ++i) { struct drm_encoder *encoder = priv->encoders[i]; if (encoder->crtc == crtc) { struct omap_dss_device *dssdev; dssdev = omap_encoder_get_dssdev(encoder); if (dssdev) { struct videomode vm = {0}; dssdev->driver->get_timings(dssdev, &vm); omap_crtc->vm.flags |= vm.flags & flags_mask; } break; } } } static int omap_crtc_atomic_check(struct drm_crtc *crtc, struct drm_crtc_state *state) { struct drm_plane_state *pri_state; if (state->color_mgmt_changed && state->gamma_lut) { uint length = state->gamma_lut->length / sizeof(struct drm_color_lut); if (length < 2) return -EINVAL; } pri_state = drm_atomic_get_new_plane_state(state->state, crtc->primary); if (pri_state) { struct omap_crtc_state *omap_crtc_state = to_omap_crtc_state(state); /* Mirror new values for zpos and rotation in omap_crtc_state */ omap_crtc_state->zpos = pri_state->zpos; omap_crtc_state->rotation = pri_state->rotation; } return 0; } static void omap_crtc_atomic_begin(struct drm_crtc *crtc, struct drm_crtc_state *old_crtc_state) { } static void omap_crtc_atomic_flush(struct drm_crtc *crtc, struct drm_crtc_state *old_crtc_state) { struct omap_drm_private *priv = crtc->dev->dev_private; struct omap_crtc *omap_crtc = to_omap_crtc(crtc); int ret; if (crtc->state->color_mgmt_changed) { struct drm_color_lut *lut = NULL; uint length = 0; if (crtc->state->gamma_lut) { lut = (struct drm_color_lut *) crtc->state->gamma_lut->data; length = crtc->state->gamma_lut->length / sizeof(*lut); } priv->dispc_ops->mgr_set_gamma(omap_crtc->channel, lut, length); } omap_crtc_write_crtc_properties(crtc); /* Only flush the CRTC if it is currently enabled. */ if (!omap_crtc->enabled) return; DBG("%s: GO", omap_crtc->name); ret = drm_crtc_vblank_get(crtc); WARN_ON(ret != 0); spin_lock_irq(&crtc->dev->event_lock); priv->dispc_ops->mgr_go(omap_crtc->channel); omap_crtc_arm_event(crtc); spin_unlock_irq(&crtc->dev->event_lock); } static int omap_crtc_atomic_set_property(struct drm_crtc *crtc, struct drm_crtc_state *state, struct drm_property *property, uint64_t val) { struct omap_drm_private *priv = crtc->dev->dev_private; struct drm_plane_state *plane_state; /* * Delegate property set to the primary plane. Get the plane state and * set the property directly, the shadow copy will be assigned in the * omap_crtc_atomic_check callback. This way updates to plane state will * always be mirrored in the crtc state correctly. */ plane_state = drm_atomic_get_plane_state(state->state, crtc->primary); if (IS_ERR(plane_state)) return PTR_ERR(plane_state); if (property == crtc->primary->rotation_property) plane_state->rotation = val; else if (property == priv->zorder_prop) plane_state->zpos = val; else return -EINVAL; return 0; } static int omap_crtc_atomic_get_property(struct drm_crtc *crtc, const struct drm_crtc_state *state, struct drm_property *property, uint64_t *val) { struct omap_drm_private *priv = crtc->dev->dev_private; struct omap_crtc_state *omap_state = to_omap_crtc_state(state); if (property == crtc->primary->rotation_property) *val = omap_state->rotation; else if (property == priv->zorder_prop) *val = omap_state->zpos; else return -EINVAL; return 0; } static void omap_crtc_reset(struct drm_crtc *crtc) { if (crtc->state) __drm_atomic_helper_crtc_destroy_state(crtc->state); kfree(crtc->state); crtc->state = kzalloc(sizeof(struct omap_crtc_state), GFP_KERNEL); if (crtc->state) crtc->state->crtc = crtc; } static struct drm_crtc_state * omap_crtc_duplicate_state(struct drm_crtc *crtc) { struct omap_crtc_state *state, *current_state; if (WARN_ON(!crtc->state)) return NULL; current_state = to_omap_crtc_state(crtc->state); state = kmalloc(sizeof(*state), GFP_KERNEL); if (!state) return NULL; __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base); state->zpos = current_state->zpos; state->rotation = current_state->rotation; return &state->base; } static const struct drm_crtc_funcs omap_crtc_funcs = { .reset = omap_crtc_reset, .set_config = drm_atomic_helper_set_config, .destroy = omap_crtc_destroy, .page_flip = drm_atomic_helper_page_flip, .gamma_set = drm_atomic_helper_legacy_gamma_set, .atomic_duplicate_state = omap_crtc_duplicate_state, .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, .atomic_set_property = omap_crtc_atomic_set_property, .atomic_get_property = omap_crtc_atomic_get_property, .enable_vblank = omap_irq_enable_vblank, .disable_vblank = omap_irq_disable_vblank, }; static const struct drm_crtc_helper_funcs omap_crtc_helper_funcs = { .mode_set_nofb = omap_crtc_mode_set_nofb, .atomic_check = omap_crtc_atomic_check, .atomic_begin = omap_crtc_atomic_begin, .atomic_flush = omap_crtc_atomic_flush, .atomic_enable = omap_crtc_atomic_enable, .atomic_disable = omap_crtc_atomic_disable, }; /* ----------------------------------------------------------------------------- * Init and Cleanup */ static const char *channel_names[] = { [OMAP_DSS_CHANNEL_LCD] = "lcd", [OMAP_DSS_CHANNEL_DIGIT] = "tv", [OMAP_DSS_CHANNEL_LCD2] = "lcd2", [OMAP_DSS_CHANNEL_LCD3] = "lcd3", }; void omap_crtc_pre_init(void) { memset(omap_crtcs, 0, sizeof(omap_crtcs)); dss_install_mgr_ops(&mgr_ops); } void omap_crtc_pre_uninit(void) { dss_uninstall_mgr_ops(); } /* initialize crtc */ struct drm_crtc *omap_crtc_init(struct drm_device *dev, struct drm_plane *plane, struct omap_dss_device *dssdev) { struct omap_drm_private *priv = dev->dev_private; struct drm_crtc *crtc = NULL; struct omap_crtc *omap_crtc; enum omap_channel channel; struct omap_dss_device *out; int ret; out = omapdss_find_output_from_display(dssdev); channel = out->dispc_channel; omap_dss_put_device(out); DBG("%s", channel_names[channel]); /* Multiple displays on same channel is not allowed */ if (WARN_ON(omap_crtcs[channel] != NULL)) return ERR_PTR(-EINVAL); omap_crtc = kzalloc(sizeof(*omap_crtc), GFP_KERNEL); if (!omap_crtc) return ERR_PTR(-ENOMEM); crtc = &omap_crtc->base; init_waitqueue_head(&omap_crtc->pending_wait); omap_crtc->channel = channel; omap_crtc->name = channel_names[channel]; ret = drm_crtc_init_with_planes(dev, crtc, plane, NULL, &omap_crtc_funcs, NULL); if (ret < 0) { dev_err(dev->dev, "%s(): could not init crtc for: %s\n", __func__, dssdev->name); kfree(omap_crtc); return ERR_PTR(ret); } drm_crtc_helper_add(crtc, &omap_crtc_helper_funcs); /* The dispc API adapts to what ever size, but the HW supports * 256 element gamma table for LCDs and 1024 element table for * OMAP_DSS_CHANNEL_DIGIT. X server assumes 256 element gamma * tables so lets use that. Size of HW gamma table can be * extracted with dispc_mgr_gamma_size(). If it returns 0 * gamma table is not supprted. */ if (priv->dispc_ops->mgr_gamma_size(channel)) { uint gamma_lut_size = 256; drm_crtc_enable_color_mgmt(crtc, 0, false, gamma_lut_size); drm_mode_crtc_set_gamma_size(crtc, gamma_lut_size); } omap_plane_install_properties(crtc->primary, &crtc->base); omap_crtcs[channel] = omap_crtc; return crtc; }