![Rob Clark](/assets/img/avatar_default.png)
And simplify how we hold a ref+pin to what is being scanned out by using fb refcnt'ing. The previous logic pre-dated fb refcnt, and as a result was less straightforward than it could have been. By holding a ref to the fb, we don't have to care about how many plane's there are and holding a ref to each color plane's bo. Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
448 lines
12 KiB
C
448 lines
12 KiB
C
/*
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* drivers/gpu/drm/omapdrm/omap_plane.c
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*
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* Copyright (C) 2011 Texas Instruments
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* Author: Rob Clark <rob.clark@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "drm_flip_work.h"
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#include "omap_drv.h"
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#include "omap_dmm_tiler.h"
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/* some hackery because omapdss has an 'enum omap_plane' (which would be
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* better named omap_plane_id).. and compiler seems unhappy about having
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* both a 'struct omap_plane' and 'enum omap_plane'
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*/
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#define omap_plane _omap_plane
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/*
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* plane funcs
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*/
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struct callback {
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void (*fxn)(void *);
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void *arg;
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};
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#define to_omap_plane(x) container_of(x, struct omap_plane, base)
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struct omap_plane {
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struct drm_plane base;
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int id; /* TODO rename omap_plane -> omap_plane_id in omapdss so I can use the enum */
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const char *name;
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struct omap_overlay_info info;
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struct omap_drm_apply apply;
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/* position/orientation of scanout within the fb: */
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struct omap_drm_window win;
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bool enabled;
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/* last fb that we pinned: */
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struct drm_framebuffer *pinned_fb;
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uint32_t nformats;
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uint32_t formats[32];
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struct omap_drm_irq error_irq;
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/* for deferring bo unpin's until next post_apply(): */
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struct drm_flip_work unpin_work;
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// XXX maybe get rid of this and handle vblank in crtc too?
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struct callback apply_done_cb;
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};
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static void unpin_worker(struct drm_flip_work *work, void *val)
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{
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struct omap_plane *omap_plane =
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container_of(work, struct omap_plane, unpin_work);
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struct drm_device *dev = omap_plane->base.dev;
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omap_framebuffer_unpin(val);
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mutex_lock(&dev->mode_config.mutex);
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drm_framebuffer_unreference(val);
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mutex_unlock(&dev->mode_config.mutex);
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}
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/* update which fb (if any) is pinned for scanout */
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static int update_pin(struct drm_plane *plane, struct drm_framebuffer *fb)
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{
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struct omap_plane *omap_plane = to_omap_plane(plane);
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struct drm_framebuffer *pinned_fb = omap_plane->pinned_fb;
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if (pinned_fb != fb) {
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int ret = 0;
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DBG("%p -> %p", pinned_fb, fb);
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if (fb) {
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drm_framebuffer_reference(fb);
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ret = omap_framebuffer_pin(fb);
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}
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if (pinned_fb)
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drm_flip_work_queue(&omap_plane->unpin_work, pinned_fb);
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if (ret) {
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dev_err(plane->dev->dev, "could not swap %p -> %p\n",
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omap_plane->pinned_fb, fb);
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drm_framebuffer_unreference(fb);
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omap_plane->pinned_fb = NULL;
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return ret;
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}
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omap_plane->pinned_fb = fb;
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}
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return 0;
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}
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static void omap_plane_pre_apply(struct omap_drm_apply *apply)
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{
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struct omap_plane *omap_plane =
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container_of(apply, struct omap_plane, apply);
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struct omap_drm_window *win = &omap_plane->win;
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struct drm_plane *plane = &omap_plane->base;
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struct drm_device *dev = plane->dev;
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struct omap_overlay_info *info = &omap_plane->info;
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struct drm_crtc *crtc = plane->crtc;
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enum omap_channel channel;
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bool enabled = omap_plane->enabled && crtc;
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bool ilace, replication;
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int ret;
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DBG("%s, enabled=%d", omap_plane->name, enabled);
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/* if fb has changed, pin new fb: */
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update_pin(plane, enabled ? plane->fb : NULL);
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if (!enabled) {
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dispc_ovl_enable(omap_plane->id, false);
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return;
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}
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channel = omap_crtc_channel(crtc);
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/* update scanout: */
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omap_framebuffer_update_scanout(plane->fb, win, info);
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DBG("%dx%d -> %dx%d (%d)", info->width, info->height,
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info->out_width, info->out_height,
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info->screen_width);
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DBG("%d,%d %08x %08x", info->pos_x, info->pos_y,
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info->paddr, info->p_uv_addr);
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/* TODO: */
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ilace = false;
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replication = false;
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/* and finally, update omapdss: */
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ret = dispc_ovl_setup(omap_plane->id, info,
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replication, omap_crtc_timings(crtc), false);
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if (ret) {
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dev_err(dev->dev, "dispc_ovl_setup failed: %d\n", ret);
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return;
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}
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dispc_ovl_enable(omap_plane->id, true);
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dispc_ovl_set_channel_out(omap_plane->id, channel);
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}
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static void omap_plane_post_apply(struct omap_drm_apply *apply)
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{
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struct omap_plane *omap_plane =
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container_of(apply, struct omap_plane, apply);
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struct drm_plane *plane = &omap_plane->base;
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struct omap_drm_private *priv = plane->dev->dev_private;
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struct omap_overlay_info *info = &omap_plane->info;
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struct callback cb;
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cb = omap_plane->apply_done_cb;
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omap_plane->apply_done_cb.fxn = NULL;
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drm_flip_work_commit(&omap_plane->unpin_work, priv->wq);
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if (cb.fxn)
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cb.fxn(cb.arg);
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if (omap_plane->enabled) {
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omap_framebuffer_flush(plane->fb, info->pos_x, info->pos_y,
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info->out_width, info->out_height);
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}
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}
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static int apply(struct drm_plane *plane)
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{
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if (plane->crtc) {
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struct omap_plane *omap_plane = to_omap_plane(plane);
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return omap_crtc_apply(plane->crtc, &omap_plane->apply);
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}
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return 0;
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}
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int omap_plane_mode_set(struct drm_plane *plane,
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struct drm_crtc *crtc, struct drm_framebuffer *fb,
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int crtc_x, int crtc_y,
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unsigned int crtc_w, unsigned int crtc_h,
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uint32_t src_x, uint32_t src_y,
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uint32_t src_w, uint32_t src_h,
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void (*fxn)(void *), void *arg)
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{
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struct omap_plane *omap_plane = to_omap_plane(plane);
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struct omap_drm_window *win = &omap_plane->win;
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win->crtc_x = crtc_x;
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win->crtc_y = crtc_y;
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win->crtc_w = crtc_w;
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win->crtc_h = crtc_h;
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/* src values are in Q16 fixed point, convert to integer: */
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win->src_x = src_x >> 16;
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win->src_y = src_y >> 16;
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win->src_w = src_w >> 16;
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win->src_h = src_h >> 16;
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if (fxn) {
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/* omap_crtc should ensure that a new page flip
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* isn't permitted while there is one pending:
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*/
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BUG_ON(omap_plane->apply_done_cb.fxn);
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omap_plane->apply_done_cb.fxn = fxn;
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omap_plane->apply_done_cb.arg = arg;
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}
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plane->fb = fb;
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plane->crtc = crtc;
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return apply(plane);
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}
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static int omap_plane_update(struct drm_plane *plane,
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struct drm_crtc *crtc, struct drm_framebuffer *fb,
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int crtc_x, int crtc_y,
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unsigned int crtc_w, unsigned int crtc_h,
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uint32_t src_x, uint32_t src_y,
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uint32_t src_w, uint32_t src_h)
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{
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struct omap_plane *omap_plane = to_omap_plane(plane);
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omap_plane->enabled = true;
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if (plane->fb)
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drm_framebuffer_unreference(plane->fb);
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drm_framebuffer_reference(fb);
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return omap_plane_mode_set(plane, crtc, fb,
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crtc_x, crtc_y, crtc_w, crtc_h,
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src_x, src_y, src_w, src_h,
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NULL, NULL);
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}
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static int omap_plane_disable(struct drm_plane *plane)
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{
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struct omap_plane *omap_plane = to_omap_plane(plane);
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omap_plane->win.rotation = BIT(DRM_ROTATE_0);
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return omap_plane_dpms(plane, DRM_MODE_DPMS_OFF);
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}
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static void omap_plane_destroy(struct drm_plane *plane)
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{
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struct omap_plane *omap_plane = to_omap_plane(plane);
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DBG("%s", omap_plane->name);
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omap_irq_unregister(plane->dev, &omap_plane->error_irq);
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omap_plane_disable(plane);
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drm_plane_cleanup(plane);
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drm_flip_work_cleanup(&omap_plane->unpin_work);
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kfree(omap_plane);
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}
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int omap_plane_dpms(struct drm_plane *plane, int mode)
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{
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struct omap_plane *omap_plane = to_omap_plane(plane);
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bool enabled = (mode == DRM_MODE_DPMS_ON);
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int ret = 0;
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if (enabled != omap_plane->enabled) {
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omap_plane->enabled = enabled;
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ret = apply(plane);
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}
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return ret;
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}
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/* helper to install properties which are common to planes and crtcs */
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void omap_plane_install_properties(struct drm_plane *plane,
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struct drm_mode_object *obj)
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{
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struct drm_device *dev = plane->dev;
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struct omap_drm_private *priv = dev->dev_private;
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struct drm_property *prop;
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if (priv->has_dmm) {
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prop = priv->rotation_prop;
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if (!prop) {
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const struct drm_prop_enum_list props[] = {
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{ DRM_ROTATE_0, "rotate-0" },
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{ DRM_ROTATE_90, "rotate-90" },
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{ DRM_ROTATE_180, "rotate-180" },
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{ DRM_ROTATE_270, "rotate-270" },
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{ DRM_REFLECT_X, "reflect-x" },
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{ DRM_REFLECT_Y, "reflect-y" },
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};
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prop = drm_property_create_bitmask(dev, 0, "rotation",
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props, ARRAY_SIZE(props));
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if (prop == NULL)
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return;
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priv->rotation_prop = prop;
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}
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drm_object_attach_property(obj, prop, 0);
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}
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prop = priv->zorder_prop;
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if (!prop) {
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prop = drm_property_create_range(dev, 0, "zorder", 0, 3);
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if (prop == NULL)
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return;
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priv->zorder_prop = prop;
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}
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drm_object_attach_property(obj, prop, 0);
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}
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int omap_plane_set_property(struct drm_plane *plane,
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struct drm_property *property, uint64_t val)
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{
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struct omap_plane *omap_plane = to_omap_plane(plane);
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struct omap_drm_private *priv = plane->dev->dev_private;
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int ret = -EINVAL;
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if (property == priv->rotation_prop) {
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DBG("%s: rotation: %02x", omap_plane->name, (uint32_t)val);
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omap_plane->win.rotation = val;
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ret = apply(plane);
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} else if (property == priv->zorder_prop) {
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DBG("%s: zorder: %02x", omap_plane->name, (uint32_t)val);
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omap_plane->info.zorder = val;
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ret = apply(plane);
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}
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return ret;
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}
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static const struct drm_plane_funcs omap_plane_funcs = {
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.update_plane = omap_plane_update,
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.disable_plane = omap_plane_disable,
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.destroy = omap_plane_destroy,
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.set_property = omap_plane_set_property,
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};
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static void omap_plane_error_irq(struct omap_drm_irq *irq, uint32_t irqstatus)
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{
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struct omap_plane *omap_plane =
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container_of(irq, struct omap_plane, error_irq);
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DRM_ERROR("%s: errors: %08x\n", omap_plane->name, irqstatus);
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}
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static const char *plane_names[] = {
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[OMAP_DSS_GFX] = "gfx",
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[OMAP_DSS_VIDEO1] = "vid1",
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[OMAP_DSS_VIDEO2] = "vid2",
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[OMAP_DSS_VIDEO3] = "vid3",
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};
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static const uint32_t error_irqs[] = {
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[OMAP_DSS_GFX] = DISPC_IRQ_GFX_FIFO_UNDERFLOW,
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[OMAP_DSS_VIDEO1] = DISPC_IRQ_VID1_FIFO_UNDERFLOW,
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[OMAP_DSS_VIDEO2] = DISPC_IRQ_VID2_FIFO_UNDERFLOW,
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[OMAP_DSS_VIDEO3] = DISPC_IRQ_VID3_FIFO_UNDERFLOW,
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};
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/* initialize plane */
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struct drm_plane *omap_plane_init(struct drm_device *dev,
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int id, bool private_plane)
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{
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struct omap_drm_private *priv = dev->dev_private;
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struct drm_plane *plane = NULL;
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struct omap_plane *omap_plane;
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struct omap_overlay_info *info;
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int ret;
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DBG("%s: priv=%d", plane_names[id], private_plane);
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omap_plane = kzalloc(sizeof(*omap_plane), GFP_KERNEL);
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if (!omap_plane)
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goto fail;
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ret = drm_flip_work_init(&omap_plane->unpin_work, 16,
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"unpin", unpin_worker);
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if (ret) {
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dev_err(dev->dev, "could not allocate unpin FIFO\n");
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goto fail;
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}
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omap_plane->nformats = omap_framebuffer_get_formats(
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omap_plane->formats, ARRAY_SIZE(omap_plane->formats),
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dss_feat_get_supported_color_modes(id));
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omap_plane->id = id;
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omap_plane->name = plane_names[id];
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plane = &omap_plane->base;
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omap_plane->apply.pre_apply = omap_plane_pre_apply;
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omap_plane->apply.post_apply = omap_plane_post_apply;
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omap_plane->error_irq.irqmask = error_irqs[id];
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omap_plane->error_irq.irq = omap_plane_error_irq;
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omap_irq_register(dev, &omap_plane->error_irq);
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drm_plane_init(dev, plane, (1 << priv->num_crtcs) - 1, &omap_plane_funcs,
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omap_plane->formats, omap_plane->nformats, private_plane);
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omap_plane_install_properties(plane, &plane->base);
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/* get our starting configuration, set defaults for parameters
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* we don't currently use, etc:
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*/
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info = &omap_plane->info;
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info->rotation_type = OMAP_DSS_ROT_DMA;
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info->rotation = OMAP_DSS_ROT_0;
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info->global_alpha = 0xff;
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info->mirror = 0;
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/* Set defaults depending on whether we are a CRTC or overlay
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* layer.
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* TODO add ioctl to give userspace an API to change this.. this
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* will come in a subsequent patch.
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*/
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if (private_plane)
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omap_plane->info.zorder = 0;
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else
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omap_plane->info.zorder = id;
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return plane;
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fail:
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if (plane)
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omap_plane_destroy(plane);
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return NULL;
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}
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