diff options
Diffstat (limited to 'drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c | 574 |
1 files changed, 574 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c new file mode 100644 index 000000000000..f2794021f086 --- /dev/null +++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c @@ -0,0 +1,574 @@ +/* + * Copyright (C) 2013 Red Hat + * Author: Rob Clark <robdclark@gmail.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/>. + */ + +#include "mdp5_kms.h" + +#include <drm/drm_mode.h> +#include "drm_crtc.h" +#include "drm_crtc_helper.h" +#include "drm_flip_work.h" + +struct mdp5_crtc { + struct drm_crtc base; + char name[8]; + struct drm_plane *plane; + struct drm_plane *planes[8]; + int id; + bool enabled; + + /* which mixer/encoder we route output to: */ + int mixer; + + /* if there is a pending flip, these will be non-null: */ + struct drm_pending_vblank_event *event; + struct msm_fence_cb pageflip_cb; + +#define PENDING_CURSOR 0x1 +#define PENDING_FLIP 0x2 + atomic_t pending; + + /* the fb that we logically (from PoV of KMS API) hold a ref + * to. Which we may not yet be scanning out (we may still + * be scanning out previous in case of page_flip while waiting + * for gpu rendering to complete: + */ + struct drm_framebuffer *fb; + + /* the fb that we currently hold a scanout ref to: */ + struct drm_framebuffer *scanout_fb; + + /* for unref'ing framebuffers after scanout completes: */ + struct drm_flip_work unref_fb_work; + + struct mdp_irq vblank; + struct mdp_irq err; +}; +#define to_mdp5_crtc(x) container_of(x, struct mdp5_crtc, base) + +static struct mdp5_kms *get_kms(struct drm_crtc *crtc) +{ + struct msm_drm_private *priv = crtc->dev->dev_private; + return to_mdp5_kms(to_mdp_kms(priv->kms)); +} + +static void request_pending(struct drm_crtc *crtc, uint32_t pending) +{ + struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc); + + atomic_or(pending, &mdp5_crtc->pending); + mdp_irq_register(&get_kms(crtc)->base, &mdp5_crtc->vblank); +} + +static void crtc_flush(struct drm_crtc *crtc) +{ + struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc); + struct mdp5_kms *mdp5_kms = get_kms(crtc); + int id = mdp5_crtc->id; + uint32_t i, flush = 0; + + for (i = 0; i < ARRAY_SIZE(mdp5_crtc->planes); i++) { + struct drm_plane *plane = mdp5_crtc->planes[i]; + if (plane) { + enum mdp5_pipe pipe = mdp5_plane_pipe(plane); + flush |= pipe2flush(pipe); + } + } + flush |= mixer2flush(mdp5_crtc->id); + flush |= MDP5_CTL_FLUSH_CTL; + + DBG("%s: flush=%08x", mdp5_crtc->name, flush); + + mdp5_write(mdp5_kms, REG_MDP5_CTL_FLUSH(id), flush); +} + +static void update_fb(struct drm_crtc *crtc, struct drm_framebuffer *new_fb) +{ + struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc); + struct drm_framebuffer *old_fb = mdp5_crtc->fb; + + /* grab reference to incoming scanout fb: */ + drm_framebuffer_reference(new_fb); + mdp5_crtc->base.fb = new_fb; + mdp5_crtc->fb = new_fb; + + if (old_fb) + drm_flip_work_queue(&mdp5_crtc->unref_fb_work, old_fb); +} + +/* unlike update_fb(), take a ref to the new scanout fb *before* updating + * plane, then call this. Needed to ensure we don't unref the buffer that + * is actually still being scanned out. + * + * Note that this whole thing goes away with atomic.. since we can defer + * calling into driver until rendering is done. + */ +static void update_scanout(struct drm_crtc *crtc, struct drm_framebuffer *fb) +{ + struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc); + + /* flush updates, to make sure hw is updated to new scanout fb, + * so that we can safely queue unref to current fb (ie. next + * vblank we know hw is done w/ previous scanout_fb). + */ + crtc_flush(crtc); + + if (mdp5_crtc->scanout_fb) + drm_flip_work_queue(&mdp5_crtc->unref_fb_work, + mdp5_crtc->scanout_fb); + + mdp5_crtc->scanout_fb = fb; + + /* enable vblank to complete flip: */ + request_pending(crtc, PENDING_FLIP); +} + +/* if file!=NULL, this is preclose potential cancel-flip path */ +static void complete_flip(struct drm_crtc *crtc, struct drm_file *file) +{ + struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc); + struct drm_device *dev = crtc->dev; + struct drm_pending_vblank_event *event; + unsigned long flags, i; + + spin_lock_irqsave(&dev->event_lock, flags); + event = mdp5_crtc->event; + if (event) { + /* if regular vblank case (!file) or if cancel-flip from + * preclose on file that requested flip, then send the + * event: + */ + if (!file || (event->base.file_priv == file)) { + mdp5_crtc->event = NULL; + drm_send_vblank_event(dev, mdp5_crtc->id, event); + } + } + spin_unlock_irqrestore(&dev->event_lock, flags); + + for (i = 0; i < ARRAY_SIZE(mdp5_crtc->planes); i++) { + struct drm_plane *plane = mdp5_crtc->planes[i]; + if (plane) + mdp5_plane_complete_flip(plane); + } +} + +static void pageflip_cb(struct msm_fence_cb *cb) +{ + struct mdp5_crtc *mdp5_crtc = + container_of(cb, struct mdp5_crtc, pageflip_cb); + struct drm_crtc *crtc = &mdp5_crtc->base; + struct drm_framebuffer *fb = mdp5_crtc->fb; + + if (!fb) + return; + + drm_framebuffer_reference(fb); + mdp5_plane_set_scanout(mdp5_crtc->plane, fb); + update_scanout(crtc, fb); +} + +static void unref_fb_worker(struct drm_flip_work *work, void *val) +{ + struct mdp5_crtc *mdp5_crtc = + container_of(work, struct mdp5_crtc, unref_fb_work); + struct drm_device *dev = mdp5_crtc->base.dev; + + mutex_lock(&dev->mode_config.mutex); + drm_framebuffer_unreference(val); + mutex_unlock(&dev->mode_config.mutex); +} + +static void mdp5_crtc_destroy(struct drm_crtc *crtc) +{ + struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc); + + mdp5_crtc->plane->funcs->destroy(mdp5_crtc->plane); + + drm_crtc_cleanup(crtc); + drm_flip_work_cleanup(&mdp5_crtc->unref_fb_work); + + kfree(mdp5_crtc); +} + +static void mdp5_crtc_dpms(struct drm_crtc *crtc, int mode) +{ + struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc); + struct mdp5_kms *mdp5_kms = get_kms(crtc); + bool enabled = (mode == DRM_MODE_DPMS_ON); + + DBG("%s: mode=%d", mdp5_crtc->name, mode); + + if (enabled != mdp5_crtc->enabled) { + if (enabled) { + mdp5_enable(mdp5_kms); + mdp_irq_register(&mdp5_kms->base, &mdp5_crtc->err); + } else { + mdp_irq_unregister(&mdp5_kms->base, &mdp5_crtc->err); + mdp5_disable(mdp5_kms); + } + mdp5_crtc->enabled = enabled; + } +} + +static bool mdp5_crtc_mode_fixup(struct drm_crtc *crtc, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + return true; +} + +static void blend_setup(struct drm_crtc *crtc) +{ + struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc); + struct mdp5_kms *mdp5_kms = get_kms(crtc); + int id = mdp5_crtc->id; + + /* + * Hard-coded setup for now until I figure out how the + * layer-mixer works + */ + + /* LM[id]: */ + mdp5_write(mdp5_kms, REG_MDP5_LM_BLEND_COLOR_OUT(id), + MDP5_LM_BLEND_COLOR_OUT_STAGE0_FG_ALPHA); + mdp5_write(mdp5_kms, REG_MDP5_LM_BLEND_OP_MODE(id, 0), + MDP5_LM_BLEND_OP_MODE_FG_ALPHA(FG_CONST) | + MDP5_LM_BLEND_OP_MODE_BG_ALPHA(FG_PIXEL) | + MDP5_LM_BLEND_OP_MODE_BG_INV_ALPHA); + mdp5_write(mdp5_kms, REG_MDP5_LM_BLEND_FG_ALPHA(id, 0), 0xff); + mdp5_write(mdp5_kms, REG_MDP5_LM_BLEND_BG_ALPHA(id, 0), 0x00); + + /* NOTE: seems that LM[n] and CTL[m], we do not need n==m.. but + * we want to be setting CTL[m].LAYER[n]. Not sure what the + * point of having CTL[m].LAYER[o] (for o!=n).. maybe that is + * used when chaining up mixers for high resolution displays? + */ + + /* CTL[id]: */ + mdp5_write(mdp5_kms, REG_MDP5_CTL_LAYER_REG(id, 0), + MDP5_CTL_LAYER_REG_RGB0(STAGE0) | + MDP5_CTL_LAYER_REG_BORDER_COLOR); + mdp5_write(mdp5_kms, REG_MDP5_CTL_LAYER_REG(id, 1), 0); + mdp5_write(mdp5_kms, REG_MDP5_CTL_LAYER_REG(id, 2), 0); + mdp5_write(mdp5_kms, REG_MDP5_CTL_LAYER_REG(id, 3), 0); + mdp5_write(mdp5_kms, REG_MDP5_CTL_LAYER_REG(id, 4), 0); +} + +static int mdp5_crtc_mode_set(struct drm_crtc *crtc, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode, + int x, int y, + struct drm_framebuffer *old_fb) +{ + struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc); + struct mdp5_kms *mdp5_kms = get_kms(crtc); + int ret; + + mode = adjusted_mode; + + DBG("%s: set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x", + mdp5_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); + + /* grab extra ref for update_scanout() */ + drm_framebuffer_reference(crtc->fb); + + ret = mdp5_plane_mode_set(mdp5_crtc->plane, crtc, crtc->fb, + 0, 0, mode->hdisplay, mode->vdisplay, + x << 16, y << 16, + mode->hdisplay << 16, mode->vdisplay << 16); + if (ret) { + drm_framebuffer_unreference(crtc->fb); + dev_err(crtc->dev->dev, "%s: failed to set mode on plane: %d\n", + mdp5_crtc->name, ret); + return ret; + } + + mdp5_write(mdp5_kms, REG_MDP5_LM_OUT_SIZE(mdp5_crtc->id), + MDP5_LM_OUT_SIZE_WIDTH(mode->hdisplay) | + MDP5_LM_OUT_SIZE_HEIGHT(mode->vdisplay)); + + update_fb(crtc, crtc->fb); + update_scanout(crtc, crtc->fb); + + return 0; +} + +static void mdp5_crtc_prepare(struct drm_crtc *crtc) +{ + struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc); + DBG("%s", mdp5_crtc->name); + /* make sure we hold a ref to mdp clks while setting up mode: */ + mdp5_enable(get_kms(crtc)); + mdp5_crtc_dpms(crtc, DRM_MODE_DPMS_OFF); +} + +static void mdp5_crtc_commit(struct drm_crtc *crtc) +{ + mdp5_crtc_dpms(crtc, DRM_MODE_DPMS_ON); + crtc_flush(crtc); + /* drop the ref to mdp clk's that we got in prepare: */ + mdp5_disable(get_kms(crtc)); +} + +static int mdp5_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, + struct drm_framebuffer *old_fb) +{ + struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc); + struct drm_plane *plane = mdp5_crtc->plane; + struct drm_display_mode *mode = &crtc->mode; + int ret; + + /* grab extra ref for update_scanout() */ + drm_framebuffer_reference(crtc->fb); + + ret = mdp5_plane_mode_set(plane, crtc, crtc->fb, + 0, 0, mode->hdisplay, mode->vdisplay, + x << 16, y << 16, + mode->hdisplay << 16, mode->vdisplay << 16); + if (ret) { + drm_framebuffer_unreference(crtc->fb); + return ret; + } + + update_fb(crtc, crtc->fb); + update_scanout(crtc, crtc->fb); + + return 0; +} + +static void mdp5_crtc_load_lut(struct drm_crtc *crtc) +{ +} + +static int mdp5_crtc_page_flip(struct drm_crtc *crtc, + struct drm_framebuffer *new_fb, + struct drm_pending_vblank_event *event, + uint32_t page_flip_flags) +{ + struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc); + struct drm_device *dev = crtc->dev; + struct drm_gem_object *obj; + unsigned long flags; + + if (mdp5_crtc->event) { + dev_err(dev->dev, "already pending flip!\n"); + return -EBUSY; + } + + obj = msm_framebuffer_bo(new_fb, 0); + + spin_lock_irqsave(&dev->event_lock, flags); + mdp5_crtc->event = event; + spin_unlock_irqrestore(&dev->event_lock, flags); + + update_fb(crtc, new_fb); + + return msm_gem_queue_inactive_cb(obj, &mdp5_crtc->pageflip_cb); +} + +static int mdp5_crtc_set_property(struct drm_crtc *crtc, + struct drm_property *property, uint64_t val) +{ + // XXX + return -EINVAL; +} + +static const struct drm_crtc_funcs mdp5_crtc_funcs = { + .set_config = drm_crtc_helper_set_config, + .destroy = mdp5_crtc_destroy, + .page_flip = mdp5_crtc_page_flip, + .set_property = mdp5_crtc_set_property, +}; + +static const struct drm_crtc_helper_funcs mdp5_crtc_helper_funcs = { + .dpms = mdp5_crtc_dpms, + .mode_fixup = mdp5_crtc_mode_fixup, + .mode_set = mdp5_crtc_mode_set, + .prepare = mdp5_crtc_prepare, + .commit = mdp5_crtc_commit, + .mode_set_base = mdp5_crtc_mode_set_base, + .load_lut = mdp5_crtc_load_lut, +}; + +static void mdp5_crtc_vblank_irq(struct mdp_irq *irq, uint32_t irqstatus) +{ + struct mdp5_crtc *mdp5_crtc = container_of(irq, struct mdp5_crtc, vblank); + struct drm_crtc *crtc = &mdp5_crtc->base; + struct msm_drm_private *priv = crtc->dev->dev_private; + unsigned pending; + + mdp_irq_unregister(&get_kms(crtc)->base, &mdp5_crtc->vblank); + + pending = atomic_xchg(&mdp5_crtc->pending, 0); + + if (pending & PENDING_FLIP) { + complete_flip(crtc, NULL); + drm_flip_work_commit(&mdp5_crtc->unref_fb_work, priv->wq); + } +} + +static void mdp5_crtc_err_irq(struct mdp_irq *irq, uint32_t irqstatus) +{ + struct mdp5_crtc *mdp5_crtc = container_of(irq, struct mdp5_crtc, err); + struct drm_crtc *crtc = &mdp5_crtc->base; + DBG("%s: error: %08x", mdp5_crtc->name, irqstatus); + crtc_flush(crtc); +} + +uint32_t mdp5_crtc_vblank(struct drm_crtc *crtc) +{ + struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc); + return mdp5_crtc->vblank.irqmask; +} + +void mdp5_crtc_cancel_pending_flip(struct drm_crtc *crtc, struct drm_file *file) +{ + DBG("cancel: %p", file); + complete_flip(crtc, file); +} + +/* set interface for routing crtc->encoder: */ +void mdp5_crtc_set_intf(struct drm_crtc *crtc, int intf, + enum mdp5_intf intf_id) +{ + struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc); + struct mdp5_kms *mdp5_kms = get_kms(crtc); + static const enum mdp5_intfnum intfnum[] = { + INTF0, INTF1, INTF2, INTF3, + }; + uint32_t intf_sel; + + /* now that we know what irq's we want: */ + mdp5_crtc->err.irqmask = intf2err(intf); + mdp5_crtc->vblank.irqmask = intf2vblank(intf); + + /* when called from modeset_init(), skip the rest until later: */ + if (!mdp5_kms) + return; + + intf_sel = mdp5_read(mdp5_kms, REG_MDP5_DISP_INTF_SEL); + + switch (intf) { + case 0: + intf_sel &= ~MDP5_DISP_INTF_SEL_INTF0__MASK; + intf_sel |= MDP5_DISP_INTF_SEL_INTF0(intf_id); + break; + case 1: + intf_sel &= ~MDP5_DISP_INTF_SEL_INTF1__MASK; + intf_sel |= MDP5_DISP_INTF_SEL_INTF1(intf_id); + break; + case 2: + intf_sel &= ~MDP5_DISP_INTF_SEL_INTF2__MASK; + intf_sel |= MDP5_DISP_INTF_SEL_INTF2(intf_id); + break; + case 3: + intf_sel &= ~MDP5_DISP_INTF_SEL_INTF3__MASK; + intf_sel |= MDP5_DISP_INTF_SEL_INTF3(intf_id); + break; + default: + BUG(); + break; + } + + blend_setup(crtc); + + DBG("%s: intf_sel=%08x", mdp5_crtc->name, intf_sel); + + mdp5_write(mdp5_kms, REG_MDP5_DISP_INTF_SEL, intf_sel); + mdp5_write(mdp5_kms, REG_MDP5_CTL_OP(mdp5_crtc->id), + MDP5_CTL_OP_MODE(MODE_NONE) | + MDP5_CTL_OP_INTF_NUM(intfnum[intf])); + + crtc_flush(crtc); +} + +static void set_attach(struct drm_crtc *crtc, enum mdp5_pipe pipe_id, + struct drm_plane *plane) +{ + struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc); + + BUG_ON(pipe_id >= ARRAY_SIZE(mdp5_crtc->planes)); + + if (mdp5_crtc->planes[pipe_id] == plane) + return; + + mdp5_crtc->planes[pipe_id] = plane; + blend_setup(crtc); + if (mdp5_crtc->enabled && (plane != mdp5_crtc->plane)) + crtc_flush(crtc); +} + +void mdp5_crtc_attach(struct drm_crtc *crtc, struct drm_plane *plane) +{ + set_attach(crtc, mdp5_plane_pipe(plane), plane); +} + +void mdp5_crtc_detach(struct drm_crtc *crtc, struct drm_plane *plane) +{ + set_attach(crtc, mdp5_plane_pipe(plane), NULL); +} + +/* initialize crtc */ +struct drm_crtc *mdp5_crtc_init(struct drm_device *dev, + struct drm_plane *plane, int id) +{ + struct drm_crtc *crtc = NULL; + struct mdp5_crtc *mdp5_crtc; + int ret; + + mdp5_crtc = kzalloc(sizeof(*mdp5_crtc), GFP_KERNEL); + if (!mdp5_crtc) { + ret = -ENOMEM; + goto fail; + } + + crtc = &mdp5_crtc->base; + + mdp5_crtc->plane = plane; + mdp5_crtc->id = id; + + mdp5_crtc->vblank.irq = mdp5_crtc_vblank_irq; + mdp5_crtc->err.irq = mdp5_crtc_err_irq; + + snprintf(mdp5_crtc->name, sizeof(mdp5_crtc->name), "%s:%d", + pipe2name(mdp5_plane_pipe(plane)), id); + + ret = drm_flip_work_init(&mdp5_crtc->unref_fb_work, 16, + "unref fb", unref_fb_worker); + if (ret) + goto fail; + + INIT_FENCE_CB(&mdp5_crtc->pageflip_cb, pageflip_cb); + + drm_crtc_init(dev, crtc, &mdp5_crtc_funcs); + drm_crtc_helper_add(crtc, &mdp5_crtc_helper_funcs); + + mdp5_plane_install_properties(mdp5_crtc->plane, &crtc->base); + + return crtc; + +fail: + if (crtc) + mdp5_crtc_destroy(crtc); + + return ERR_PTR(ret); +} |