linux/drivers/gpu/drm/omapdrm/omap_plane.c
Laurent Pinchart 69a12263f6 drm: omapdrm: Wire up atomic state object scaffolding
Hook up the default .reset(), .atomic_duplicate_state() and
.atomic_free_state() helpers to ensure that state objects are properly
created and destroyed, and call drm_mode_config_reset() at init time to
create the initial state objects.

Framebuffer reference count also gets maintained automatically by the
transitional helpers except for the legacy page flip operation. Maintain
it explicitly there.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2015-06-12 22:52:47 +03:00

383 lines
9.8 KiB
C

/*
* drivers/gpu/drm/omapdrm/omap_plane.c
*
* Copyright (C) 2011 Texas Instruments
* Author: Rob Clark <rob.clark@linaro.org>
*
* 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 <drm/drm_atomic_helper.h>
#include "omap_dmm_tiler.h"
#include "omap_drv.h"
/* some hackery because omapdss has an 'enum omap_plane' (which would be
* better named omap_plane_id).. and compiler seems unhappy about having
* both a 'struct omap_plane' and 'enum omap_plane'
*/
#define omap_plane _omap_plane
/*
* plane funcs
*/
#define to_omap_plane(x) container_of(x, struct omap_plane, base)
struct omap_plane {
struct drm_plane base;
int id; /* TODO rename omap_plane -> omap_plane_id in omapdss so I can use the enum */
const char *name;
struct omap_overlay_info info;
/* position/orientation of scanout within the fb: */
struct omap_drm_window win;
bool enabled;
/* last fb that we pinned: */
struct drm_framebuffer *pinned_fb;
uint32_t nformats;
uint32_t formats[32];
struct omap_drm_irq error_irq;
};
/* update which fb (if any) is pinned for scanout */
static int omap_plane_update_pin(struct drm_plane *plane)
{
struct omap_plane *omap_plane = to_omap_plane(plane);
struct drm_framebuffer *pinned_fb = omap_plane->pinned_fb;
struct drm_framebuffer *fb = omap_plane->enabled ? plane->fb : NULL;
int ret = 0;
if (pinned_fb == fb)
return 0;
DBG("%p -> %p", pinned_fb, fb);
if (fb) {
drm_framebuffer_reference(fb);
ret = omap_framebuffer_pin(fb);
}
if (pinned_fb)
omap_crtc_queue_unpin(plane->crtc, pinned_fb);
if (ret) {
dev_err(plane->dev->dev, "could not swap %p -> %p\n",
omap_plane->pinned_fb, fb);
drm_framebuffer_unreference(fb);
omap_plane->pinned_fb = NULL;
return ret;
}
omap_plane->pinned_fb = fb;
return 0;
}
static int omap_plane_setup(struct omap_plane *omap_plane)
{
struct omap_overlay_info *info = &omap_plane->info;
struct drm_plane *plane = &omap_plane->base;
struct drm_device *dev = plane->dev;
struct drm_crtc *crtc = plane->crtc;
int ret;
DBG("%s, enabled=%d", omap_plane->name, omap_plane->enabled);
/* if fb has changed, pin new fb: */
ret = omap_plane_update_pin(plane);
if (ret)
return ret;
dispc_runtime_get();
if (!omap_plane->enabled) {
dispc_ovl_enable(omap_plane->id, false);
goto done;
}
/* update scanout: */
omap_framebuffer_update_scanout(plane->fb, &omap_plane->win, info);
DBG("%dx%d -> %dx%d (%d)", info->width, info->height,
info->out_width, info->out_height,
info->screen_width);
DBG("%d,%d %pad %pad", info->pos_x, info->pos_y,
&info->paddr, &info->p_uv_addr);
dispc_ovl_set_channel_out(omap_plane->id,
omap_crtc_channel(crtc));
/* and finally, update omapdss: */
ret = dispc_ovl_setup(omap_plane->id, info, false,
omap_crtc_timings(crtc), false);
if (ret) {
dev_err(dev->dev, "dispc_ovl_setup failed: %d\n", ret);
goto done;
}
dispc_ovl_enable(omap_plane->id, true);
done:
dispc_runtime_put();
return ret;
}
int omap_plane_mode_set(struct drm_plane *plane,
struct drm_crtc *crtc, struct drm_framebuffer *fb,
int crtc_x, int crtc_y,
unsigned int crtc_w, unsigned int crtc_h,
unsigned int src_x, unsigned int src_y,
unsigned int src_w, unsigned int src_h)
{
struct omap_plane *omap_plane = to_omap_plane(plane);
struct omap_drm_window *win = &omap_plane->win;
win->crtc_x = crtc_x;
win->crtc_y = crtc_y;
win->crtc_w = crtc_w;
win->crtc_h = crtc_h;
win->src_x = src_x;
win->src_y = src_y;
win->src_w = src_w;
win->src_h = src_h;
return omap_plane_setup(omap_plane);
}
int omap_plane_set_enable(struct drm_plane *plane, bool enable)
{
struct omap_plane *omap_plane = to_omap_plane(plane);
if (enable == omap_plane->enabled)
return 0;
omap_plane->enabled = enable;
return omap_plane_setup(omap_plane);
}
static int omap_plane_update(struct drm_plane *plane,
struct drm_crtc *crtc, struct drm_framebuffer *fb,
int crtc_x, int crtc_y,
unsigned int crtc_w, unsigned int crtc_h,
uint32_t src_x, uint32_t src_y,
uint32_t src_w, uint32_t src_h)
{
struct omap_plane *omap_plane = to_omap_plane(plane);
int ret;
omap_plane->enabled = true;
/* omap_plane_mode_set() takes adjusted src */
switch (omap_plane->win.rotation & 0xf) {
case BIT(DRM_ROTATE_90):
case BIT(DRM_ROTATE_270):
swap(src_w, src_h);
break;
}
/*
* We don't need to take a reference to the framebuffer as the DRM core
* has already done so for the purpose of setting plane->fb.
*/
plane->fb = fb;
plane->crtc = crtc;
/* src values are in Q16 fixed point, convert to integer: */
ret = omap_plane_mode_set(plane, crtc, fb,
crtc_x, crtc_y, crtc_w, crtc_h,
src_x >> 16, src_y >> 16,
src_w >> 16, src_h >> 16);
if (ret < 0)
return ret;
return omap_crtc_flush(plane->crtc);
}
static int omap_plane_disable(struct drm_plane *plane)
{
struct omap_plane *omap_plane = to_omap_plane(plane);
omap_plane->win.rotation = BIT(DRM_ROTATE_0);
omap_plane->info.zorder = plane->type == DRM_PLANE_TYPE_PRIMARY
? 0 : omap_plane->id;
if (!omap_plane->enabled)
return 0;
/* Disabling a plane never fails. */
omap_plane->enabled = false;
omap_plane_setup(omap_plane);
return omap_crtc_flush(plane->crtc);
}
static void omap_plane_destroy(struct drm_plane *plane)
{
struct omap_plane *omap_plane = to_omap_plane(plane);
DBG("%s", omap_plane->name);
omap_irq_unregister(plane->dev, &omap_plane->error_irq);
drm_plane_cleanup(plane);
kfree(omap_plane);
}
/* helper to install properties which are common to planes and crtcs */
void omap_plane_install_properties(struct drm_plane *plane,
struct drm_mode_object *obj)
{
struct drm_device *dev = plane->dev;
struct omap_drm_private *priv = dev->dev_private;
if (priv->has_dmm) {
struct drm_property *prop = dev->mode_config.rotation_property;
drm_object_attach_property(obj, prop, 0);
}
drm_object_attach_property(obj, priv->zorder_prop, 0);
}
int omap_plane_set_property(struct drm_plane *plane,
struct drm_property *property, uint64_t val)
{
struct omap_plane *omap_plane = to_omap_plane(plane);
struct omap_drm_private *priv = plane->dev->dev_private;
int ret;
if (property == plane->dev->mode_config.rotation_property) {
DBG("%s: rotation: %02x", omap_plane->name, (uint32_t)val);
omap_plane->win.rotation = val;
} else if (property == priv->zorder_prop) {
DBG("%s: zorder: %02x", omap_plane->name, (uint32_t)val);
omap_plane->info.zorder = val;
} else {
return -EINVAL;
}
/*
* We're done if the plane is disabled, properties will be applied the
* next time it becomes enabled.
*/
if (!omap_plane->enabled)
return 0;
ret = omap_plane_setup(omap_plane);
if (ret < 0)
return ret;
return omap_crtc_flush(plane->crtc);
}
static const struct drm_plane_funcs omap_plane_funcs = {
.update_plane = omap_plane_update,
.disable_plane = omap_plane_disable,
.reset = drm_atomic_helper_plane_reset,
.destroy = omap_plane_destroy,
.set_property = omap_plane_set_property,
.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
};
static void omap_plane_error_irq(struct omap_drm_irq *irq, uint32_t irqstatus)
{
struct omap_plane *omap_plane =
container_of(irq, struct omap_plane, error_irq);
DRM_ERROR_RATELIMITED("%s: errors: %08x\n", omap_plane->name,
irqstatus);
}
static const char *plane_names[] = {
[OMAP_DSS_GFX] = "gfx",
[OMAP_DSS_VIDEO1] = "vid1",
[OMAP_DSS_VIDEO2] = "vid2",
[OMAP_DSS_VIDEO3] = "vid3",
};
static const uint32_t error_irqs[] = {
[OMAP_DSS_GFX] = DISPC_IRQ_GFX_FIFO_UNDERFLOW,
[OMAP_DSS_VIDEO1] = DISPC_IRQ_VID1_FIFO_UNDERFLOW,
[OMAP_DSS_VIDEO2] = DISPC_IRQ_VID2_FIFO_UNDERFLOW,
[OMAP_DSS_VIDEO3] = DISPC_IRQ_VID3_FIFO_UNDERFLOW,
};
/* initialize plane */
struct drm_plane *omap_plane_init(struct drm_device *dev,
int id, enum drm_plane_type type)
{
struct omap_drm_private *priv = dev->dev_private;
struct drm_plane *plane;
struct omap_plane *omap_plane;
struct omap_overlay_info *info;
int ret;
DBG("%s: type=%d", plane_names[id], type);
omap_plane = kzalloc(sizeof(*omap_plane), GFP_KERNEL);
if (!omap_plane)
return ERR_PTR(-ENOMEM);
omap_plane->nformats = omap_framebuffer_get_formats(
omap_plane->formats, ARRAY_SIZE(omap_plane->formats),
dss_feat_get_supported_color_modes(id));
omap_plane->id = id;
omap_plane->name = plane_names[id];
plane = &omap_plane->base;
omap_plane->error_irq.irqmask = error_irqs[id];
omap_plane->error_irq.irq = omap_plane_error_irq;
omap_irq_register(dev, &omap_plane->error_irq);
ret = drm_universal_plane_init(dev, plane, (1 << priv->num_crtcs) - 1,
&omap_plane_funcs, omap_plane->formats,
omap_plane->nformats, type);
if (ret < 0)
goto error;
omap_plane_install_properties(plane, &plane->base);
/* get our starting configuration, set defaults for parameters
* we don't currently use, etc:
*/
info = &omap_plane->info;
info->rotation_type = OMAP_DSS_ROT_DMA;
info->rotation = OMAP_DSS_ROT_0;
info->global_alpha = 0xff;
info->mirror = 0;
/* Set defaults depending on whether we are a CRTC or overlay
* layer.
* TODO add ioctl to give userspace an API to change this.. this
* will come in a subsequent patch.
*/
if (type == DRM_PLANE_TYPE_PRIMARY)
omap_plane->info.zorder = 0;
else
omap_plane->info.zorder = id;
return plane;
error:
omap_irq_unregister(plane->dev, &omap_plane->error_irq);
kfree(omap_plane);
return NULL;
}