| Message ID | 1468469749-12636-1-git-send-email-ykk@rock-chips.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
On Thu, Jul 14, 2016 at 12:15:49PM +0800, Yakir Yang wrote: > The PSR driver have exported four symbols for specific device driver: > - rockchip_drm_psr_register() > - rockchip_drm_psr_unregister() > - rockchip_drm_psr_enable() > - rockchip_drm_psr_disable() > - rockchip_drm_psr_flush() > > Encoder driver should call the register/unregister interfaces to hook > itself into common PSR driver, encoder have implement the 'psr_set' > callback which use the set PSR state in hardware side. > > Crtc driver would call the enable/disable interfaces when vblank is > enable/disable, after that the common PSR driver would call the encoder > registered callback to set the PSR state. > > Fb driver would call the flush interface in 'fb->dirty' callback, this > helper function would force all PSR enabled encoders to exit from PSR > for 3 seconds. > > Signed-off-by: Yakir Yang <ykk@rock-chips.com> I still don't think it's a good idea to pull this out into a separate PSR driver, but I suppose we can integrate it at a later time if it becomes cumbersome. Reviewed-by: Sean Paul <seanpaul@chromium.org> > --- > Changes in v4: > - Tuck the global "psr_list" & "psr_list_mutex" in struct rockchip_drm_private. (Sean) > - Move the access of "psr->state" under "psr->state_mutex"'s protect. (Sean) > - Let "psr->state = PSR_FLUSH" under "psr->state_mutex"'s protect. (Sean) > - Collect psr_enable() and psr_disable() into psr_set_state() > - s/5\ second/PSR_FLUSH_TIMEOUT/ (Sean) > - Flush the psr callback in vop_crtc_disable(). (Stéphane, reviewed in Google gerrit) > [https://chromium-review.googlesource.com/#/c/349084/6/drivers/gpu/drm/rockchip/rockchip_drm_vop.c@475] > - Add the missing file head with license. (Stéphane, reviewed in Google gerrit) > [https://chromium-review.googlesource.com/#/c/357563/1/drivers/gpu/drm/rockchip/rockchip_drm_psr.h@3] > > Changes in v3: > - split the psr flow into an common abstracted PSR driver > - implement the 'fb->dirty' callback function (Daniel) > - avoid to use notify to acqiure for vact event (Daniel) > - remove psr_active() callback which introduce in v2 > > Changes in v2: None > > drivers/gpu/drm/rockchip/Makefile | 2 +- > drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 4 + > drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 3 + > drivers/gpu/drm/rockchip/rockchip_drm_fb.c | 12 ++ > drivers/gpu/drm/rockchip/rockchip_drm_psr.c | 223 ++++++++++++++++++++++++++++ > drivers/gpu/drm/rockchip/rockchip_drm_psr.h | 26 ++++ > drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 29 ++++ > 7 files changed, 298 insertions(+), 1 deletion(-) > create mode 100644 drivers/gpu/drm/rockchip/rockchip_drm_psr.c > create mode 100644 drivers/gpu/drm/rockchip/rockchip_drm_psr.h > > diff --git a/drivers/gpu/drm/rockchip/Makefile b/drivers/gpu/drm/rockchip/Makefile > index 05d0713..9746365 100644 > --- a/drivers/gpu/drm/rockchip/Makefile > +++ b/drivers/gpu/drm/rockchip/Makefile > @@ -3,7 +3,7 @@ > # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher. > > rockchipdrm-y := rockchip_drm_drv.o rockchip_drm_fb.o \ > - rockchip_drm_gem.o rockchip_drm_vop.o > + rockchip_drm_gem.o rockchip_drm_psr.o rockchip_drm_vop.o > rockchipdrm-$(CONFIG_DRM_FBDEV_EMULATION) += rockchip_drm_fbdev.o > > obj-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o > diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c > index d665fb0..26c12b3 100644 > --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c > +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c > @@ -156,6 +156,9 @@ static int rockchip_drm_bind(struct device *dev) > > drm_dev->dev_private = private; > > + INIT_LIST_HEAD(&private->psr_list); > + mutex_init(&private->psr_list_mutex); > + > drm_mode_config_init(drm_dev); > > rockchip_drm_mode_config_init(drm_dev); > @@ -218,6 +221,7 @@ static int rockchip_drm_bind(struct device *dev) > > if (is_support_iommu) > arm_iommu_release_mapping(mapping); > + > return 0; > err_fbdev_fini: > rockchip_drm_fbdev_fini(drm_dev); > diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h > index 239b830..9c34c9e 100644 > --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h > +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h > @@ -61,6 +61,9 @@ struct rockchip_drm_private { > struct drm_gem_object *fbdev_bo; > const struct rockchip_crtc_funcs *crtc_funcs[ROCKCHIP_MAX_CRTC]; > struct drm_atomic_state *state; > + > + struct list_head psr_list; > + struct mutex psr_list_mutex; > }; > > int rockchip_register_crtc_funcs(struct drm_crtc *crtc, > diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c > index 20f12bc..36afd9c 100644 > --- a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c > +++ b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c > @@ -21,6 +21,7 @@ > > #include "rockchip_drm_drv.h" > #include "rockchip_drm_gem.h" > +#include "rockchip_drm_psr.h" > > #define to_rockchip_fb(x) container_of(x, struct rockchip_drm_fb, fb) > > @@ -66,9 +67,20 @@ static int rockchip_drm_fb_create_handle(struct drm_framebuffer *fb, > rockchip_fb->obj[0], handle); > } > > +static int rockchip_drm_fb_dirty(struct drm_framebuffer *fb, > + struct drm_file *file, > + unsigned int flags, unsigned int color, > + struct drm_clip_rect *clips, > + unsigned int num_clips) > +{ > + rockchip_drm_psr_flush(fb->dev); > + return 0; > +} > + > static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = { > .destroy = rockchip_drm_fb_destroy, > .create_handle = rockchip_drm_fb_create_handle, > + .dirty = rockchip_drm_fb_dirty, > }; > > static struct rockchip_drm_fb * > diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c > new file mode 100644 > index 0000000..e79ea18 > --- /dev/null > +++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c > @@ -0,0 +1,223 @@ > +/* > + * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd > + * Author: Yakir Yang <ykk@rock-chips.com> > + * > + * This software is licensed under the terms of the GNU General Public > + * License version 2, as published by the Free Software Foundation, and > + * may be copied, distributed, and modified under those terms. > + * > + * 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. > + */ > + > +#include <drm/drmP.h> > +#include <drm/drm_crtc_helper.h> > + > +#include "rockchip_drm_drv.h" > +#include "rockchip_drm_psr.h" > + > +#define PSR_FLUSH_TIMEOUT msecs_to_jiffies(3000) /* 3 seconds */ > + > +static LIST_HEAD(psr_list); > +static DEFINE_MUTEX(psr_list_mutex); > + > +enum psr_state { > + PSR_FLUSH, > + PSR_ENABLE, > + PSR_DISABLE, > +}; > + > +struct psr_drv { > + struct list_head list; > + enum psr_state state; > + struct mutex state_mutex; > + > + struct timer_list flush_timer; > + > + struct drm_encoder *encoder; > + void (*set)(struct drm_encoder *encoder, bool enable); > +}; > + > +static struct psr_drv *find_psr_by_crtc(struct drm_crtc *crtc) > +{ > + struct rockchip_drm_private *drm_drv = crtc->dev->dev_private; > + struct psr_drv *psr; > + > + mutex_lock(&drm_drv->psr_list_mutex); > + list_for_each_entry(psr, &drm_drv->psr_list, list) { > + if (psr->encoder->crtc == crtc) { > + mutex_unlock(&drm_drv->psr_list_mutex); > + return psr; > + } > + } > + mutex_unlock(&drm_drv->psr_list_mutex); > + > + return ERR_PTR(-ENODEV); > +} > + > +static void psr_set_state(struct psr_drv *psr, enum psr_state state) > +{ > + mutex_lock(&psr->state_mutex); > + > + if (psr->state == state) { > + mutex_unlock(&psr->state_mutex); > + return; > + } > + > + psr->state = state; > + switch (state) { > + case PSR_ENABLE: > + psr->set(psr->encoder, true); > + break; > + > + case PSR_DISABLE: > + case PSR_FLUSH: > + psr->set(psr->encoder, false); > + break; > + }; > + > + mutex_unlock(&psr->state_mutex); > +} > + > +static void psr_flush_handler(unsigned long data) > +{ > + struct psr_drv *psr = (struct psr_drv *)data; > + > + if (!psr || psr->state != PSR_FLUSH) > + return; > + > + psr_set_state(psr, PSR_ENABLE); > +} > + > +/** > + * rockchip_drm_psr_enable - enable the encoder PSR which bind to given CRTC > + * @crtc: CRTC to obtain the PSR encoder > + * > + * Returns: > + * Zero on success, negative errno on failure. > + */ > +int rockchip_drm_psr_enable(struct drm_crtc *crtc) > +{ > + struct psr_drv *psr = find_psr_by_crtc(crtc); > + > + if (IS_ERR(psr)) > + return PTR_ERR(psr); > + > + psr_set_state(psr, PSR_ENABLE); > + return 0; > +} > +EXPORT_SYMBOL(rockchip_drm_psr_enable); > + > +/** > + * rockchip_drm_psr_disable - disable the encoder PSR which bind to given CRTC > + * @crtc: CRTC to obtain the PSR encoder > + * > + * Returns: > + * Zero on success, negative errno on failure. > + */ > +int rockchip_drm_psr_disable(struct drm_crtc *crtc) > +{ > + struct psr_drv *psr = find_psr_by_crtc(crtc); > + > + if (IS_ERR(psr)) > + return PTR_ERR(psr); > + > + psr_set_state(psr, PSR_DISABLE); > + return 0; > +} > +EXPORT_SYMBOL(rockchip_drm_psr_disable); > + > +/** > + * rockchip_drm_psr_flush - force to flush all registered PSR encoders > + * @dev: drm device > + * > + * Disable the PSR function for all registered encoders, and then enable the > + * PSR function back after PSR_FLUSH_TIMEOUT. If encoder PSR state have been > + * changed during flush time, then keep the state no change after flush > + * timeout. > + * > + * Returns: > + * Zero on success, negative errno on failure. > + */ > +void rockchip_drm_psr_flush(struct drm_device *dev) > +{ > + struct rockchip_drm_private *drm_drv = dev->dev_private; > + struct psr_drv *psr; > + > + mutex_lock(&drm_drv->psr_list_mutex); > + list_for_each_entry(psr, &drm_drv->psr_list, list) { > + if (psr->state == PSR_DISABLE) > + continue; > + > + mod_timer(&psr->flush_timer, > + round_jiffies_up(jiffies + PSR_FLUSH_TIMEOUT)); > + > + psr_set_state(psr, PSR_FLUSH); > + } > + mutex_unlock(&drm_drv->psr_list_mutex); > +} > +EXPORT_SYMBOL(rockchip_drm_psr_flush); > + > +/** > + * rockchip_drm_psr_register - register encoder to psr driver > + * @encoder: encoder that obtain the PSR function > + * @psr_set: call back to set PSR state > + * > + * Returns: > + * Zero on success, negative errno on failure. > + */ > +int rockchip_drm_psr_register(struct drm_encoder *encoder, > + void (*psr_set)(struct drm_encoder *, bool enable)) > +{ > + struct rockchip_drm_private *drm_drv = encoder->dev->dev_private; > + struct psr_drv *psr; > + > + if (!encoder || !psr_set) > + return -EINVAL; > + > + psr = kzalloc(sizeof(struct psr_drv), GFP_KERNEL); > + if (!psr) > + return -ENOMEM; > + > + setup_timer(&psr->flush_timer, psr_flush_handler, (unsigned long)psr); > + > + mutex_init(&psr->state_mutex); > + > + psr->state = PSR_DISABLE; > + psr->encoder = encoder; > + psr->set = psr_set; > + > + mutex_lock(&drm_drv->psr_list_mutex); > + list_add_tail(&psr->list, &drm_drv->psr_list); > + mutex_unlock(&drm_drv->psr_list_mutex); > + > + return 0; > +} > +EXPORT_SYMBOL(rockchip_drm_psr_register); > + > +/** > + * rockchip_drm_psr_unregister - unregister encoder to psr driver > + * @encoder: encoder that obtain the PSR function > + * @psr_set: call back to set PSR state > + * > + * Returns: > + * Zero on success, negative errno on failure. > + */ > +void rockchip_drm_psr_unregister(struct drm_encoder *encoder) > +{ > + struct rockchip_drm_private *drm_drv = encoder->dev->dev_private; > + struct psr_drv *psr; > + > + mutex_lock(&drm_drv->psr_list_mutex); > + list_for_each_entry(psr, &drm_drv->psr_list, list) { > + if (psr->encoder == encoder) { > + del_timer(&psr->flush_timer); > + list_del(&psr->list); > + kfree(psr); > + } > + } > + mutex_unlock(&drm_drv->psr_list_mutex); > +} > +EXPORT_SYMBOL(rockchip_drm_psr_unregister); > diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.h b/drivers/gpu/drm/rockchip/rockchip_drm_psr.h > new file mode 100644 > index 0000000..c35b688 > --- /dev/null > +++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.h > @@ -0,0 +1,26 @@ > +/* > + * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd > + * Author: Yakir Yang <ykk@rock-chips.com> > + * > + * This software is licensed under the terms of the GNU General Public > + * License version 2, as published by the Free Software Foundation, and > + * may be copied, distributed, and modified under those terms. > + * > + * 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. > + */ > + > +#ifndef __ROCKCHIP_DRM_PSR___ > +#define __ROCKCHIP_DRM_PSR___ > + > +void rockchip_drm_psr_flush(struct drm_device *dev); > +int rockchip_drm_psr_enable(struct drm_crtc *crtc); > +int rockchip_drm_psr_disable(struct drm_crtc *crtc); > + > +int rockchip_drm_psr_register(struct drm_encoder *encoder, > + void (*psr_set)(struct drm_encoder *, bool enable)); > +void rockchip_drm_psr_unregister(struct drm_encoder *encoder); > + > +#endif /* __ROCKCHIP_DRM_PSR__ */ > diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c > index 69d32f1..e702fb3 100644 > --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c > +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c > @@ -34,6 +34,7 @@ > #include "rockchip_drm_drv.h" > #include "rockchip_drm_gem.h" > #include "rockchip_drm_fb.h" > +#include "rockchip_drm_psr.h" > #include "rockchip_drm_vop.h" > > #define __REG_SET_RELAXED(x, off, mask, shift, v, write_mask) \ > @@ -87,6 +88,8 @@ > #define to_vop_win(x) container_of(x, struct vop_win, base) > #define to_vop_plane_state(x) container_of(x, struct vop_plane_state, base) > > +#define VOP_PSR_SET_DELAY_TIME msecs_to_jiffies(10) > + > struct vop_plane_state { > struct drm_plane_state base; > int format; > @@ -121,6 +124,9 @@ struct vop { > /* protected by dev->event_lock */ > struct drm_pending_vblank_event *event; > > + bool psr_enabled; > + struct delayed_work psr_work; > + > struct completion line_flag_completion; > > const struct vop_data *data; > @@ -629,6 +635,9 @@ static void vop_crtc_disable(struct drm_crtc *crtc) > > crtc->state->event = NULL; > } > + > + vop->psr_enabled = false; > + INIT_DELAYED_WORK(&vop->psr_work, vop_psr_work); > } > > static void vop_plane_destroy(struct drm_plane *plane) > @@ -923,6 +932,16 @@ static const struct drm_plane_funcs vop_plane_funcs = { > .atomic_destroy_state = vop_atomic_plane_destroy_state, > }; > > +static void vop_psr_work(struct work_struct *work) > +{ > + struct vop *vop = container_of(work, typeof(*vop), psr_work.work); > + > + if (vop->psr_enabled) > + rockchip_drm_psr_enable(&vop->crtc); > + else > + rockchip_drm_psr_disable(&vop->crtc); > +} > + > static int vop_crtc_enable_vblank(struct drm_crtc *crtc) > { > struct vop *vop = to_vop(crtc); > @@ -937,6 +956,9 @@ static int vop_crtc_enable_vblank(struct drm_crtc *crtc) > > spin_unlock_irqrestore(&vop->irq_lock, flags); > > + vop->psr_enabled = false; > + schedule_delayed_work(&vop->psr_work, VOP_PSR_SET_DELAY_TIME); > + > return 0; > } > > @@ -953,6 +975,9 @@ static void vop_crtc_disable_vblank(struct drm_crtc *crtc) > VOP_INTR_SET_TYPE(vop, enable, FS_INTR, 0); > > spin_unlock_irqrestore(&vop->irq_lock, flags); > + > + vop->psr_enabled = true; > + schedule_delayed_work(&vop->psr_work, VOP_PSR_SET_DELAY_TIME); > } > > static void vop_crtc_wait_for_update(struct drm_crtc *crtc) > @@ -1597,6 +1622,10 @@ static int vop_bind(struct device *dev, struct device *master, void *data) > return ret; > > pm_runtime_enable(&pdev->dev); > + > + vop->psr_enabled = false; > + INIT_DELAYED_WORK(&vop->psr_work, vop_psr_work); > + > return 0; > } > > -- > 1.9.1 > > > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Sean, On 07/14/2016 11:14 PM, Sean Paul wrote: > On Thu, Jul 14, 2016 at 12:15:49PM +0800, Yakir Yang wrote: >> The PSR driver have exported four symbols for specific device driver: >> - rockchip_drm_psr_register() >> - rockchip_drm_psr_unregister() >> - rockchip_drm_psr_enable() >> - rockchip_drm_psr_disable() >> - rockchip_drm_psr_flush() >> >> Encoder driver should call the register/unregister interfaces to hook >> itself into common PSR driver, encoder have implement the 'psr_set' >> callback which use the set PSR state in hardware side. >> >> Crtc driver would call the enable/disable interfaces when vblank is >> enable/disable, after that the common PSR driver would call the encoder >> registered callback to set the PSR state. >> >> Fb driver would call the flush interface in 'fb->dirty' callback, this >> helper function would force all PSR enabled encoders to exit from PSR >> for 3 seconds. >> >> Signed-off-by: Yakir Yang <ykk@rock-chips.com> > > I still don't think it's a good idea to pull this out into a separate PSR > driver, but I suppose we can integrate it at a later time if it becomes > cumbersome. > > Reviewed-by: Sean Paul <seanpaul@chromium.org> Thanks :-D - Yakir > >> --- >> Changes in v4: >> - Tuck the global "psr_list" & "psr_list_mutex" in struct rockchip_drm_private. (Sean) >> - Move the access of "psr->state" under "psr->state_mutex"'s protect. (Sean) >> - Let "psr->state = PSR_FLUSH" under "psr->state_mutex"'s protect. (Sean) >> - Collect psr_enable() and psr_disable() into psr_set_state() >> - s/5\ second/PSR_FLUSH_TIMEOUT/ (Sean) >> - Flush the psr callback in vop_crtc_disable(). (Stéphane, reviewed in Google gerrit) >> [https://chromium-review.googlesource.com/#/c/349084/6/drivers/gpu/drm/rockchip/rockchip_drm_vop.c@475] >> - Add the missing file head with license. (Stéphane, reviewed in Google gerrit) >> [https://chromium-review.googlesource.com/#/c/357563/1/drivers/gpu/drm/rockchip/rockchip_drm_psr.h@3] >> >> Changes in v3: >> - split the psr flow into an common abstracted PSR driver >> - implement the 'fb->dirty' callback function (Daniel) >> - avoid to use notify to acqiure for vact event (Daniel) >> - remove psr_active() callback which introduce in v2 >> >> Changes in v2: None >> >> drivers/gpu/drm/rockchip/Makefile | 2 +- >> drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 4 + >> drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 3 + >> drivers/gpu/drm/rockchip/rockchip_drm_fb.c | 12 ++ >> drivers/gpu/drm/rockchip/rockchip_drm_psr.c | 223 ++++++++++++++++++++++++++++ >> drivers/gpu/drm/rockchip/rockchip_drm_psr.h | 26 ++++ >> drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 29 ++++ >> 7 files changed, 298 insertions(+), 1 deletion(-) >> create mode 100644 drivers/gpu/drm/rockchip/rockchip_drm_psr.c >> create mode 100644 drivers/gpu/drm/rockchip/rockchip_drm_psr.h >> >> diff --git a/drivers/gpu/drm/rockchip/Makefile b/drivers/gpu/drm/rockchip/Makefile >> index 05d0713..9746365 100644 >> --- a/drivers/gpu/drm/rockchip/Makefile >> +++ b/drivers/gpu/drm/rockchip/Makefile >> @@ -3,7 +3,7 @@ >> # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher. >> >> rockchipdrm-y := rockchip_drm_drv.o rockchip_drm_fb.o \ >> - rockchip_drm_gem.o rockchip_drm_vop.o >> + rockchip_drm_gem.o rockchip_drm_psr.o rockchip_drm_vop.o >> rockchipdrm-$(CONFIG_DRM_FBDEV_EMULATION) += rockchip_drm_fbdev.o >> >> obj-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o >> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c >> index d665fb0..26c12b3 100644 >> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c >> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c >> @@ -156,6 +156,9 @@ static int rockchip_drm_bind(struct device *dev) >> >> drm_dev->dev_private = private; >> >> + INIT_LIST_HEAD(&private->psr_list); >> + mutex_init(&private->psr_list_mutex); >> + >> drm_mode_config_init(drm_dev); >> >> rockchip_drm_mode_config_init(drm_dev); >> @@ -218,6 +221,7 @@ static int rockchip_drm_bind(struct device *dev) >> >> if (is_support_iommu) >> arm_iommu_release_mapping(mapping); >> + >> return 0; >> err_fbdev_fini: >> rockchip_drm_fbdev_fini(drm_dev); >> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h >> index 239b830..9c34c9e 100644 >> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h >> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h >> @@ -61,6 +61,9 @@ struct rockchip_drm_private { >> struct drm_gem_object *fbdev_bo; >> const struct rockchip_crtc_funcs *crtc_funcs[ROCKCHIP_MAX_CRTC]; >> struct drm_atomic_state *state; >> + >> + struct list_head psr_list; >> + struct mutex psr_list_mutex; >> }; >> >> int rockchip_register_crtc_funcs(struct drm_crtc *crtc, >> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c >> index 20f12bc..36afd9c 100644 >> --- a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c >> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c >> @@ -21,6 +21,7 @@ >> >> #include "rockchip_drm_drv.h" >> #include "rockchip_drm_gem.h" >> +#include "rockchip_drm_psr.h" >> >> #define to_rockchip_fb(x) container_of(x, struct rockchip_drm_fb, fb) >> >> @@ -66,9 +67,20 @@ static int rockchip_drm_fb_create_handle(struct drm_framebuffer *fb, >> rockchip_fb->obj[0], handle); >> } >> >> +static int rockchip_drm_fb_dirty(struct drm_framebuffer *fb, >> + struct drm_file *file, >> + unsigned int flags, unsigned int color, >> + struct drm_clip_rect *clips, >> + unsigned int num_clips) >> +{ >> + rockchip_drm_psr_flush(fb->dev); >> + return 0; >> +} >> + >> static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = { >> .destroy = rockchip_drm_fb_destroy, >> .create_handle = rockchip_drm_fb_create_handle, >> + .dirty = rockchip_drm_fb_dirty, >> }; >> >> static struct rockchip_drm_fb * >> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c >> new file mode 100644 >> index 0000000..e79ea18 >> --- /dev/null >> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c >> @@ -0,0 +1,223 @@ >> +/* >> + * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd >> + * Author: Yakir Yang <ykk@rock-chips.com> >> + * >> + * This software is licensed under the terms of the GNU General Public >> + * License version 2, as published by the Free Software Foundation, and >> + * may be copied, distributed, and modified under those terms. >> + * >> + * 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. >> + */ >> + >> +#include <drm/drmP.h> >> +#include <drm/drm_crtc_helper.h> >> + >> +#include "rockchip_drm_drv.h" >> +#include "rockchip_drm_psr.h" >> + >> +#define PSR_FLUSH_TIMEOUT msecs_to_jiffies(3000) /* 3 seconds */ >> + >> +static LIST_HEAD(psr_list); >> +static DEFINE_MUTEX(psr_list_mutex); >> + >> +enum psr_state { >> + PSR_FLUSH, >> + PSR_ENABLE, >> + PSR_DISABLE, >> +}; >> + >> +struct psr_drv { >> + struct list_head list; >> + enum psr_state state; >> + struct mutex state_mutex; >> + >> + struct timer_list flush_timer; >> + >> + struct drm_encoder *encoder; >> + void (*set)(struct drm_encoder *encoder, bool enable); >> +}; >> + >> +static struct psr_drv *find_psr_by_crtc(struct drm_crtc *crtc) >> +{ >> + struct rockchip_drm_private *drm_drv = crtc->dev->dev_private; >> + struct psr_drv *psr; >> + >> + mutex_lock(&drm_drv->psr_list_mutex); >> + list_for_each_entry(psr, &drm_drv->psr_list, list) { >> + if (psr->encoder->crtc == crtc) { >> + mutex_unlock(&drm_drv->psr_list_mutex); >> + return psr; >> + } >> + } >> + mutex_unlock(&drm_drv->psr_list_mutex); >> + >> + return ERR_PTR(-ENODEV); >> +} >> + >> +static void psr_set_state(struct psr_drv *psr, enum psr_state state) >> +{ >> + mutex_lock(&psr->state_mutex); >> + >> + if (psr->state == state) { >> + mutex_unlock(&psr->state_mutex); >> + return; >> + } >> + >> + psr->state = state; >> + switch (state) { >> + case PSR_ENABLE: >> + psr->set(psr->encoder, true); >> + break; >> + >> + case PSR_DISABLE: >> + case PSR_FLUSH: >> + psr->set(psr->encoder, false); >> + break; >> + }; >> + >> + mutex_unlock(&psr->state_mutex); >> +} >> + >> +static void psr_flush_handler(unsigned long data) >> +{ >> + struct psr_drv *psr = (struct psr_drv *)data; >> + >> + if (!psr || psr->state != PSR_FLUSH) >> + return; >> + >> + psr_set_state(psr, PSR_ENABLE); >> +} >> + >> +/** >> + * rockchip_drm_psr_enable - enable the encoder PSR which bind to given CRTC >> + * @crtc: CRTC to obtain the PSR encoder >> + * >> + * Returns: >> + * Zero on success, negative errno on failure. >> + */ >> +int rockchip_drm_psr_enable(struct drm_crtc *crtc) >> +{ >> + struct psr_drv *psr = find_psr_by_crtc(crtc); >> + >> + if (IS_ERR(psr)) >> + return PTR_ERR(psr); >> + >> + psr_set_state(psr, PSR_ENABLE); >> + return 0; >> +} >> +EXPORT_SYMBOL(rockchip_drm_psr_enable); >> + >> +/** >> + * rockchip_drm_psr_disable - disable the encoder PSR which bind to given CRTC >> + * @crtc: CRTC to obtain the PSR encoder >> + * >> + * Returns: >> + * Zero on success, negative errno on failure. >> + */ >> +int rockchip_drm_psr_disable(struct drm_crtc *crtc) >> +{ >> + struct psr_drv *psr = find_psr_by_crtc(crtc); >> + >> + if (IS_ERR(psr)) >> + return PTR_ERR(psr); >> + >> + psr_set_state(psr, PSR_DISABLE); >> + return 0; >> +} >> +EXPORT_SYMBOL(rockchip_drm_psr_disable); >> + >> +/** >> + * rockchip_drm_psr_flush - force to flush all registered PSR encoders >> + * @dev: drm device >> + * >> + * Disable the PSR function for all registered encoders, and then enable the >> + * PSR function back after PSR_FLUSH_TIMEOUT. If encoder PSR state have been >> + * changed during flush time, then keep the state no change after flush >> + * timeout. >> + * >> + * Returns: >> + * Zero on success, negative errno on failure. >> + */ >> +void rockchip_drm_psr_flush(struct drm_device *dev) >> +{ >> + struct rockchip_drm_private *drm_drv = dev->dev_private; >> + struct psr_drv *psr; >> + >> + mutex_lock(&drm_drv->psr_list_mutex); >> + list_for_each_entry(psr, &drm_drv->psr_list, list) { >> + if (psr->state == PSR_DISABLE) >> + continue; >> + >> + mod_timer(&psr->flush_timer, >> + round_jiffies_up(jiffies + PSR_FLUSH_TIMEOUT)); >> + >> + psr_set_state(psr, PSR_FLUSH); >> + } >> + mutex_unlock(&drm_drv->psr_list_mutex); >> +} >> +EXPORT_SYMBOL(rockchip_drm_psr_flush); >> + >> +/** >> + * rockchip_drm_psr_register - register encoder to psr driver >> + * @encoder: encoder that obtain the PSR function >> + * @psr_set: call back to set PSR state >> + * >> + * Returns: >> + * Zero on success, negative errno on failure. >> + */ >> +int rockchip_drm_psr_register(struct drm_encoder *encoder, >> + void (*psr_set)(struct drm_encoder *, bool enable)) >> +{ >> + struct rockchip_drm_private *drm_drv = encoder->dev->dev_private; >> + struct psr_drv *psr; >> + >> + if (!encoder || !psr_set) >> + return -EINVAL; >> + >> + psr = kzalloc(sizeof(struct psr_drv), GFP_KERNEL); >> + if (!psr) >> + return -ENOMEM; >> + >> + setup_timer(&psr->flush_timer, psr_flush_handler, (unsigned long)psr); >> + >> + mutex_init(&psr->state_mutex); >> + >> + psr->state = PSR_DISABLE; >> + psr->encoder = encoder; >> + psr->set = psr_set; >> + >> + mutex_lock(&drm_drv->psr_list_mutex); >> + list_add_tail(&psr->list, &drm_drv->psr_list); >> + mutex_unlock(&drm_drv->psr_list_mutex); >> + >> + return 0; >> +} >> +EXPORT_SYMBOL(rockchip_drm_psr_register); >> + >> +/** >> + * rockchip_drm_psr_unregister - unregister encoder to psr driver >> + * @encoder: encoder that obtain the PSR function >> + * @psr_set: call back to set PSR state >> + * >> + * Returns: >> + * Zero on success, negative errno on failure. >> + */ >> +void rockchip_drm_psr_unregister(struct drm_encoder *encoder) >> +{ >> + struct rockchip_drm_private *drm_drv = encoder->dev->dev_private; >> + struct psr_drv *psr; >> + >> + mutex_lock(&drm_drv->psr_list_mutex); >> + list_for_each_entry(psr, &drm_drv->psr_list, list) { >> + if (psr->encoder == encoder) { >> + del_timer(&psr->flush_timer); >> + list_del(&psr->list); >> + kfree(psr); >> + } >> + } >> + mutex_unlock(&drm_drv->psr_list_mutex); >> +} >> +EXPORT_SYMBOL(rockchip_drm_psr_unregister); >> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.h b/drivers/gpu/drm/rockchip/rockchip_drm_psr.h >> new file mode 100644 >> index 0000000..c35b688 >> --- /dev/null >> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.h >> @@ -0,0 +1,26 @@ >> +/* >> + * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd >> + * Author: Yakir Yang <ykk@rock-chips.com> >> + * >> + * This software is licensed under the terms of the GNU General Public >> + * License version 2, as published by the Free Software Foundation, and >> + * may be copied, distributed, and modified under those terms. >> + * >> + * 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. >> + */ >> + >> +#ifndef __ROCKCHIP_DRM_PSR___ >> +#define __ROCKCHIP_DRM_PSR___ >> + >> +void rockchip_drm_psr_flush(struct drm_device *dev); >> +int rockchip_drm_psr_enable(struct drm_crtc *crtc); >> +int rockchip_drm_psr_disable(struct drm_crtc *crtc); >> + >> +int rockchip_drm_psr_register(struct drm_encoder *encoder, >> + void (*psr_set)(struct drm_encoder *, bool enable)); >> +void rockchip_drm_psr_unregister(struct drm_encoder *encoder); >> + >> +#endif /* __ROCKCHIP_DRM_PSR__ */ >> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c >> index 69d32f1..e702fb3 100644 >> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c >> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c >> @@ -34,6 +34,7 @@ >> #include "rockchip_drm_drv.h" >> #include "rockchip_drm_gem.h" >> #include "rockchip_drm_fb.h" >> +#include "rockchip_drm_psr.h" >> #include "rockchip_drm_vop.h" >> >> #define __REG_SET_RELAXED(x, off, mask, shift, v, write_mask) \ >> @@ -87,6 +88,8 @@ >> #define to_vop_win(x) container_of(x, struct vop_win, base) >> #define to_vop_plane_state(x) container_of(x, struct vop_plane_state, base) >> >> +#define VOP_PSR_SET_DELAY_TIME msecs_to_jiffies(10) >> + >> struct vop_plane_state { >> struct drm_plane_state base; >> int format; >> @@ -121,6 +124,9 @@ struct vop { >> /* protected by dev->event_lock */ >> struct drm_pending_vblank_event *event; >> >> + bool psr_enabled; >> + struct delayed_work psr_work; >> + >> struct completion line_flag_completion; >> >> const struct vop_data *data; >> @@ -629,6 +635,9 @@ static void vop_crtc_disable(struct drm_crtc *crtc) >> >> crtc->state->event = NULL; >> } >> + >> + vop->psr_enabled = false; >> + INIT_DELAYED_WORK(&vop->psr_work, vop_psr_work); >> } >> >> static void vop_plane_destroy(struct drm_plane *plane) >> @@ -923,6 +932,16 @@ static const struct drm_plane_funcs vop_plane_funcs = { >> .atomic_destroy_state = vop_atomic_plane_destroy_state, >> }; >> >> +static void vop_psr_work(struct work_struct *work) >> +{ >> + struct vop *vop = container_of(work, typeof(*vop), psr_work.work); >> + >> + if (vop->psr_enabled) >> + rockchip_drm_psr_enable(&vop->crtc); >> + else >> + rockchip_drm_psr_disable(&vop->crtc); >> +} >> + >> static int vop_crtc_enable_vblank(struct drm_crtc *crtc) >> { >> struct vop *vop = to_vop(crtc); >> @@ -937,6 +956,9 @@ static int vop_crtc_enable_vblank(struct drm_crtc *crtc) >> >> spin_unlock_irqrestore(&vop->irq_lock, flags); >> >> + vop->psr_enabled = false; >> + schedule_delayed_work(&vop->psr_work, VOP_PSR_SET_DELAY_TIME); >> + >> return 0; >> } >> >> @@ -953,6 +975,9 @@ static void vop_crtc_disable_vblank(struct drm_crtc *crtc) >> VOP_INTR_SET_TYPE(vop, enable, FS_INTR, 0); >> >> spin_unlock_irqrestore(&vop->irq_lock, flags); >> + >> + vop->psr_enabled = true; >> + schedule_delayed_work(&vop->psr_work, VOP_PSR_SET_DELAY_TIME); >> } >> >> static void vop_crtc_wait_for_update(struct drm_crtc *crtc) >> @@ -1597,6 +1622,10 @@ static int vop_bind(struct device *dev, struct device *master, void *data) >> return ret; >> >> pm_runtime_enable(&pdev->dev); >> + >> + vop->psr_enabled = false; >> + INIT_DELAYED_WORK(&vop->psr_work, vop_psr_work); >> + >> return 0; >> } >> >> -- >> 1.9.1 >> >> >> _______________________________________________ >> dri-devel mailing list >> dri-devel@lists.freedesktop.org >> https://lists.freedesktop.org/mailman/listinfo/dri-devel > > -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Yakir, On Wed, Jul 13, 2016 at 9:15 PM, Yakir Yang <ykk@rock-chips.com> wrote: > +static void psr_set_state(struct psr_drv *psr, enum psr_state state) > +{ > + mutex_lock(&psr->state_mutex); > + > + if (psr->state == state) { > + mutex_unlock(&psr->state_mutex); > + return; > + } > + > + psr->state = state; > + switch (state) { > + case PSR_ENABLE: > + psr->set(psr->encoder, true); > + break; > + > + case PSR_DISABLE: > + case PSR_FLUSH: > + psr->set(psr->encoder, false); > + break; > + }; > + > + mutex_unlock(&psr->state_mutex); > +} > + > +static void psr_flush_handler(unsigned long data) > +{ > + struct psr_drv *psr = (struct psr_drv *)data; > + > + if (!psr || psr->state != PSR_FLUSH) > + return; > + > + psr_set_state(psr, PSR_ENABLE); As mentioned in a separate thread, this is probably not OK. psr_set_state() grabs a mutex and that might sleep. ...but psr_flush_handler() is a timer. I'm nearly certain that timers can't sleep. I believe this is the source of "sleeping function called from invalid context" that I've seen at times. -Doug -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Doug, On 07/23/2016 12:04 PM, Doug Anderson wrote: > Yakir, > > On Wed, Jul 13, 2016 at 9:15 PM, Yakir Yang <ykk@rock-chips.com> wrote: >> +static void psr_set_state(struct psr_drv *psr, enum psr_state state) >> +{ >> + mutex_lock(&psr->state_mutex); >> + >> + if (psr->state == state) { >> + mutex_unlock(&psr->state_mutex); >> + return; >> + } >> + >> + psr->state = state; >> + switch (state) { >> + case PSR_ENABLE: >> + psr->set(psr->encoder, true); >> + break; >> + >> + case PSR_DISABLE: >> + case PSR_FLUSH: >> + psr->set(psr->encoder, false); >> + break; >> + }; >> + >> + mutex_unlock(&psr->state_mutex); >> +} >> + >> +static void psr_flush_handler(unsigned long data) >> +{ >> + struct psr_drv *psr = (struct psr_drv *)data; >> + >> + if (!psr || psr->state != PSR_FLUSH) >> + return; >> + >> + psr_set_state(psr, PSR_ENABLE); > As mentioned in a separate thread, this is probably not OK. > psr_set_state() grabs a mutex and that might sleep. ...but > psr_flush_handler() is a timer. I'm nearly certain that timers can't > sleep. > > I believe this is the source of "sleeping function called from invalid > context" that I've seen at times. Thanks for your reported, i have wrote a patch[0] to fix this problem in my v5. If you're happy to review, that would be great ;) [0]: https://patchwork.kernel.org/patch/9244805/ - Yakir > > -Doug > > > -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Sean, On 07/14/2016 11:14 PM, Sean Paul wrote: > On Thu, Jul 14, 2016 at 12:15:49PM +0800, Yakir Yang wrote: >> The PSR driver have exported four symbols for specific device driver: >> - rockchip_drm_psr_register() >> - rockchip_drm_psr_unregister() >> - rockchip_drm_psr_enable() >> - rockchip_drm_psr_disable() >> - rockchip_drm_psr_flush() >> >> Encoder driver should call the register/unregister interfaces to hook >> itself into common PSR driver, encoder have implement the 'psr_set' >> callback which use the set PSR state in hardware side. >> >> Crtc driver would call the enable/disable interfaces when vblank is >> enable/disable, after that the common PSR driver would call the encoder >> registered callback to set the PSR state. >> >> Fb driver would call the flush interface in 'fb->dirty' callback, this >> helper function would force all PSR enabled encoders to exit from PSR >> for 3 seconds. >> >> Signed-off-by: Yakir Yang <ykk@rock-chips.com> > > I still don't think it's a good idea to pull this out into a separate PSR > driver, but I suppose we can integrate it at a later time if it becomes > cumbersome. > > Reviewed-by: Sean Paul <seanpaul@chromium.org> In order to make it safely to call those symbols at interrupt context, i have made lots of changes about this patch. It's not suitable to take your reviewed flag at the v5, if you're happy to review the new one [0], that would be very nice :-D [0]: https://patchwork.kernel.org/patch/9244805/ Thanks, - Yakir > >> --- >> Changes in v4: >> - Tuck the global "psr_list" & "psr_list_mutex" in struct rockchip_drm_private. (Sean) >> - Move the access of "psr->state" under "psr->state_mutex"'s protect. (Sean) >> - Let "psr->state = PSR_FLUSH" under "psr->state_mutex"'s protect. (Sean) >> - Collect psr_enable() and psr_disable() into psr_set_state() >> - s/5\ second/PSR_FLUSH_TIMEOUT/ (Sean) >> - Flush the psr callback in vop_crtc_disable(). (Stéphane, reviewed in Google gerrit) >> [https://chromium-review.googlesource.com/#/c/349084/6/drivers/gpu/drm/rockchip/rockchip_drm_vop.c@475] >> - Add the missing file head with license. (Stéphane, reviewed in Google gerrit) >> [https://chromium-review.googlesource.com/#/c/357563/1/drivers/gpu/drm/rockchip/rockchip_drm_psr.h@3] >> >> Changes in v3: >> - split the psr flow into an common abstracted PSR driver >> - implement the 'fb->dirty' callback function (Daniel) >> - avoid to use notify to acqiure for vact event (Daniel) >> - remove psr_active() callback which introduce in v2 >> >> Changes in v2: None >> >> drivers/gpu/drm/rockchip/Makefile | 2 +- >> drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 4 + >> drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 3 + >> drivers/gpu/drm/rockchip/rockchip_drm_fb.c | 12 ++ >> drivers/gpu/drm/rockchip/rockchip_drm_psr.c | 223 ++++++++++++++++++++++++++++ >> drivers/gpu/drm/rockchip/rockchip_drm_psr.h | 26 ++++ >> drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 29 ++++ >> 7 files changed, 298 insertions(+), 1 deletion(-) >> create mode 100644 drivers/gpu/drm/rockchip/rockchip_drm_psr.c >> create mode 100644 drivers/gpu/drm/rockchip/rockchip_drm_psr.h >> >> diff --git a/drivers/gpu/drm/rockchip/Makefile b/drivers/gpu/drm/rockchip/Makefile >> index 05d0713..9746365 100644 >> --- a/drivers/gpu/drm/rockchip/Makefile >> +++ b/drivers/gpu/drm/rockchip/Makefile >> @@ -3,7 +3,7 @@ >> # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher. >> >> rockchipdrm-y := rockchip_drm_drv.o rockchip_drm_fb.o \ >> - rockchip_drm_gem.o rockchip_drm_vop.o >> + rockchip_drm_gem.o rockchip_drm_psr.o rockchip_drm_vop.o >> rockchipdrm-$(CONFIG_DRM_FBDEV_EMULATION) += rockchip_drm_fbdev.o >> >> obj-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o >> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c >> index d665fb0..26c12b3 100644 >> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c >> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c >> @@ -156,6 +156,9 @@ static int rockchip_drm_bind(struct device *dev) >> >> drm_dev->dev_private = private; >> >> + INIT_LIST_HEAD(&private->psr_list); >> + mutex_init(&private->psr_list_mutex); >> + >> drm_mode_config_init(drm_dev); >> >> rockchip_drm_mode_config_init(drm_dev); >> @@ -218,6 +221,7 @@ static int rockchip_drm_bind(struct device *dev) >> >> if (is_support_iommu) >> arm_iommu_release_mapping(mapping); >> + >> return 0; >> err_fbdev_fini: >> rockchip_drm_fbdev_fini(drm_dev); >> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h >> index 239b830..9c34c9e 100644 >> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h >> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h >> @@ -61,6 +61,9 @@ struct rockchip_drm_private { >> struct drm_gem_object *fbdev_bo; >> const struct rockchip_crtc_funcs *crtc_funcs[ROCKCHIP_MAX_CRTC]; >> struct drm_atomic_state *state; >> + >> + struct list_head psr_list; >> + struct mutex psr_list_mutex; >> }; >> >> int rockchip_register_crtc_funcs(struct drm_crtc *crtc, >> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c >> index 20f12bc..36afd9c 100644 >> --- a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c >> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c >> @@ -21,6 +21,7 @@ >> >> #include "rockchip_drm_drv.h" >> #include "rockchip_drm_gem.h" >> +#include "rockchip_drm_psr.h" >> >> #define to_rockchip_fb(x) container_of(x, struct rockchip_drm_fb, fb) >> >> @@ -66,9 +67,20 @@ static int rockchip_drm_fb_create_handle(struct drm_framebuffer *fb, >> rockchip_fb->obj[0], handle); >> } >> >> +static int rockchip_drm_fb_dirty(struct drm_framebuffer *fb, >> + struct drm_file *file, >> + unsigned int flags, unsigned int color, >> + struct drm_clip_rect *clips, >> + unsigned int num_clips) >> +{ >> + rockchip_drm_psr_flush(fb->dev); >> + return 0; >> +} >> + >> static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = { >> .destroy = rockchip_drm_fb_destroy, >> .create_handle = rockchip_drm_fb_create_handle, >> + .dirty = rockchip_drm_fb_dirty, >> }; >> >> static struct rockchip_drm_fb * >> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c >> new file mode 100644 >> index 0000000..e79ea18 >> --- /dev/null >> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c >> @@ -0,0 +1,223 @@ >> +/* >> + * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd >> + * Author: Yakir Yang <ykk@rock-chips.com> >> + * >> + * This software is licensed under the terms of the GNU General Public >> + * License version 2, as published by the Free Software Foundation, and >> + * may be copied, distributed, and modified under those terms. >> + * >> + * 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. >> + */ >> + >> +#include <drm/drmP.h> >> +#include <drm/drm_crtc_helper.h> >> + >> +#include "rockchip_drm_drv.h" >> +#include "rockchip_drm_psr.h" >> + >> +#define PSR_FLUSH_TIMEOUT msecs_to_jiffies(3000) /* 3 seconds */ >> + >> +static LIST_HEAD(psr_list); >> +static DEFINE_MUTEX(psr_list_mutex); >> + >> +enum psr_state { >> + PSR_FLUSH, >> + PSR_ENABLE, >> + PSR_DISABLE, >> +}; >> + >> +struct psr_drv { >> + struct list_head list; >> + enum psr_state state; >> + struct mutex state_mutex; >> + >> + struct timer_list flush_timer; >> + >> + struct drm_encoder *encoder; >> + void (*set)(struct drm_encoder *encoder, bool enable); >> +}; >> + >> +static struct psr_drv *find_psr_by_crtc(struct drm_crtc *crtc) >> +{ >> + struct rockchip_drm_private *drm_drv = crtc->dev->dev_private; >> + struct psr_drv *psr; >> + >> + mutex_lock(&drm_drv->psr_list_mutex); >> + list_for_each_entry(psr, &drm_drv->psr_list, list) { >> + if (psr->encoder->crtc == crtc) { >> + mutex_unlock(&drm_drv->psr_list_mutex); >> + return psr; >> + } >> + } >> + mutex_unlock(&drm_drv->psr_list_mutex); >> + >> + return ERR_PTR(-ENODEV); >> +} >> + >> +static void psr_set_state(struct psr_drv *psr, enum psr_state state) >> +{ >> + mutex_lock(&psr->state_mutex); >> + >> + if (psr->state == state) { >> + mutex_unlock(&psr->state_mutex); >> + return; >> + } >> + >> + psr->state = state; >> + switch (state) { >> + case PSR_ENABLE: >> + psr->set(psr->encoder, true); >> + break; >> + >> + case PSR_DISABLE: >> + case PSR_FLUSH: >> + psr->set(psr->encoder, false); >> + break; >> + }; >> + >> + mutex_unlock(&psr->state_mutex); >> +} >> + >> +static void psr_flush_handler(unsigned long data) >> +{ >> + struct psr_drv *psr = (struct psr_drv *)data; >> + >> + if (!psr || psr->state != PSR_FLUSH) >> + return; >> + >> + psr_set_state(psr, PSR_ENABLE); >> +} >> + >> +/** >> + * rockchip_drm_psr_enable - enable the encoder PSR which bind to given CRTC >> + * @crtc: CRTC to obtain the PSR encoder >> + * >> + * Returns: >> + * Zero on success, negative errno on failure. >> + */ >> +int rockchip_drm_psr_enable(struct drm_crtc *crtc) >> +{ >> + struct psr_drv *psr = find_psr_by_crtc(crtc); >> + >> + if (IS_ERR(psr)) >> + return PTR_ERR(psr); >> + >> + psr_set_state(psr, PSR_ENABLE); >> + return 0; >> +} >> +EXPORT_SYMBOL(rockchip_drm_psr_enable); >> + >> +/** >> + * rockchip_drm_psr_disable - disable the encoder PSR which bind to given CRTC >> + * @crtc: CRTC to obtain the PSR encoder >> + * >> + * Returns: >> + * Zero on success, negative errno on failure. >> + */ >> +int rockchip_drm_psr_disable(struct drm_crtc *crtc) >> +{ >> + struct psr_drv *psr = find_psr_by_crtc(crtc); >> + >> + if (IS_ERR(psr)) >> + return PTR_ERR(psr); >> + >> + psr_set_state(psr, PSR_DISABLE); >> + return 0; >> +} >> +EXPORT_SYMBOL(rockchip_drm_psr_disable); >> + >> +/** >> + * rockchip_drm_psr_flush - force to flush all registered PSR encoders >> + * @dev: drm device >> + * >> + * Disable the PSR function for all registered encoders, and then enable the >> + * PSR function back after PSR_FLUSH_TIMEOUT. If encoder PSR state have been >> + * changed during flush time, then keep the state no change after flush >> + * timeout. >> + * >> + * Returns: >> + * Zero on success, negative errno on failure. >> + */ >> +void rockchip_drm_psr_flush(struct drm_device *dev) >> +{ >> + struct rockchip_drm_private *drm_drv = dev->dev_private; >> + struct psr_drv *psr; >> + >> + mutex_lock(&drm_drv->psr_list_mutex); >> + list_for_each_entry(psr, &drm_drv->psr_list, list) { >> + if (psr->state == PSR_DISABLE) >> + continue; >> + >> + mod_timer(&psr->flush_timer, >> + round_jiffies_up(jiffies + PSR_FLUSH_TIMEOUT)); >> + >> + psr_set_state(psr, PSR_FLUSH); >> + } >> + mutex_unlock(&drm_drv->psr_list_mutex); >> +} >> +EXPORT_SYMBOL(rockchip_drm_psr_flush); >> + >> +/** >> + * rockchip_drm_psr_register - register encoder to psr driver >> + * @encoder: encoder that obtain the PSR function >> + * @psr_set: call back to set PSR state >> + * >> + * Returns: >> + * Zero on success, negative errno on failure. >> + */ >> +int rockchip_drm_psr_register(struct drm_encoder *encoder, >> + void (*psr_set)(struct drm_encoder *, bool enable)) >> +{ >> + struct rockchip_drm_private *drm_drv = encoder->dev->dev_private; >> + struct psr_drv *psr; >> + >> + if (!encoder || !psr_set) >> + return -EINVAL; >> + >> + psr = kzalloc(sizeof(struct psr_drv), GFP_KERNEL); >> + if (!psr) >> + return -ENOMEM; >> + >> + setup_timer(&psr->flush_timer, psr_flush_handler, (unsigned long)psr); >> + >> + mutex_init(&psr->state_mutex); >> + >> + psr->state = PSR_DISABLE; >> + psr->encoder = encoder; >> + psr->set = psr_set; >> + >> + mutex_lock(&drm_drv->psr_list_mutex); >> + list_add_tail(&psr->list, &drm_drv->psr_list); >> + mutex_unlock(&drm_drv->psr_list_mutex); >> + >> + return 0; >> +} >> +EXPORT_SYMBOL(rockchip_drm_psr_register); >> + >> +/** >> + * rockchip_drm_psr_unregister - unregister encoder to psr driver >> + * @encoder: encoder that obtain the PSR function >> + * @psr_set: call back to set PSR state >> + * >> + * Returns: >> + * Zero on success, negative errno on failure. >> + */ >> +void rockchip_drm_psr_unregister(struct drm_encoder *encoder) >> +{ >> + struct rockchip_drm_private *drm_drv = encoder->dev->dev_private; >> + struct psr_drv *psr; >> + >> + mutex_lock(&drm_drv->psr_list_mutex); >> + list_for_each_entry(psr, &drm_drv->psr_list, list) { >> + if (psr->encoder == encoder) { >> + del_timer(&psr->flush_timer); >> + list_del(&psr->list); >> + kfree(psr); >> + } >> + } >> + mutex_unlock(&drm_drv->psr_list_mutex); >> +} >> +EXPORT_SYMBOL(rockchip_drm_psr_unregister); >> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.h b/drivers/gpu/drm/rockchip/rockchip_drm_psr.h >> new file mode 100644 >> index 0000000..c35b688 >> --- /dev/null >> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.h >> @@ -0,0 +1,26 @@ >> +/* >> + * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd >> + * Author: Yakir Yang <ykk@rock-chips.com> >> + * >> + * This software is licensed under the terms of the GNU General Public >> + * License version 2, as published by the Free Software Foundation, and >> + * may be copied, distributed, and modified under those terms. >> + * >> + * 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. >> + */ >> + >> +#ifndef __ROCKCHIP_DRM_PSR___ >> +#define __ROCKCHIP_DRM_PSR___ >> + >> +void rockchip_drm_psr_flush(struct drm_device *dev); >> +int rockchip_drm_psr_enable(struct drm_crtc *crtc); >> +int rockchip_drm_psr_disable(struct drm_crtc *crtc); >> + >> +int rockchip_drm_psr_register(struct drm_encoder *encoder, >> + void (*psr_set)(struct drm_encoder *, bool enable)); >> +void rockchip_drm_psr_unregister(struct drm_encoder *encoder); >> + >> +#endif /* __ROCKCHIP_DRM_PSR__ */ >> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c >> index 69d32f1..e702fb3 100644 >> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c >> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c >> @@ -34,6 +34,7 @@ >> #include "rockchip_drm_drv.h" >> #include "rockchip_drm_gem.h" >> #include "rockchip_drm_fb.h" >> +#include "rockchip_drm_psr.h" >> #include "rockchip_drm_vop.h" >> >> #define __REG_SET_RELAXED(x, off, mask, shift, v, write_mask) \ >> @@ -87,6 +88,8 @@ >> #define to_vop_win(x) container_of(x, struct vop_win, base) >> #define to_vop_plane_state(x) container_of(x, struct vop_plane_state, base) >> >> +#define VOP_PSR_SET_DELAY_TIME msecs_to_jiffies(10) >> + >> struct vop_plane_state { >> struct drm_plane_state base; >> int format; >> @@ -121,6 +124,9 @@ struct vop { >> /* protected by dev->event_lock */ >> struct drm_pending_vblank_event *event; >> >> + bool psr_enabled; >> + struct delayed_work psr_work; >> + >> struct completion line_flag_completion; >> >> const struct vop_data *data; >> @@ -629,6 +635,9 @@ static void vop_crtc_disable(struct drm_crtc *crtc) >> >> crtc->state->event = NULL; >> } >> + >> + vop->psr_enabled = false; >> + INIT_DELAYED_WORK(&vop->psr_work, vop_psr_work); >> } >> >> static void vop_plane_destroy(struct drm_plane *plane) >> @@ -923,6 +932,16 @@ static const struct drm_plane_funcs vop_plane_funcs = { >> .atomic_destroy_state = vop_atomic_plane_destroy_state, >> }; >> >> +static void vop_psr_work(struct work_struct *work) >> +{ >> + struct vop *vop = container_of(work, typeof(*vop), psr_work.work); >> + >> + if (vop->psr_enabled) >> + rockchip_drm_psr_enable(&vop->crtc); >> + else >> + rockchip_drm_psr_disable(&vop->crtc); >> +} >> + >> static int vop_crtc_enable_vblank(struct drm_crtc *crtc) >> { >> struct vop *vop = to_vop(crtc); >> @@ -937,6 +956,9 @@ static int vop_crtc_enable_vblank(struct drm_crtc *crtc) >> >> spin_unlock_irqrestore(&vop->irq_lock, flags); >> >> + vop->psr_enabled = false; >> + schedule_delayed_work(&vop->psr_work, VOP_PSR_SET_DELAY_TIME); >> + >> return 0; >> } >> >> @@ -953,6 +975,9 @@ static void vop_crtc_disable_vblank(struct drm_crtc *crtc) >> VOP_INTR_SET_TYPE(vop, enable, FS_INTR, 0); >> >> spin_unlock_irqrestore(&vop->irq_lock, flags); >> + >> + vop->psr_enabled = true; >> + schedule_delayed_work(&vop->psr_work, VOP_PSR_SET_DELAY_TIME); >> } >> >> static void vop_crtc_wait_for_update(struct drm_crtc *crtc) >> @@ -1597,6 +1622,10 @@ static int vop_bind(struct device *dev, struct device *master, void *data) >> return ret; >> >> pm_runtime_enable(&pdev->dev); >> + >> + vop->psr_enabled = false; >> + INIT_DELAYED_WORK(&vop->psr_work, vop_psr_work); >> + >> return 0; >> } >> >> -- >> 1.9.1 >> >> >> _______________________________________________ >> dri-devel mailing list >> dri-devel@lists.freedesktop.org >> https://lists.freedesktop.org/mailman/listinfo/dri-devel > > -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/gpu/drm/rockchip/Makefile b/drivers/gpu/drm/rockchip/Makefile index 05d0713..9746365 100644 --- a/drivers/gpu/drm/rockchip/Makefile +++ b/drivers/gpu/drm/rockchip/Makefile @@ -3,7 +3,7 @@ # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher. rockchipdrm-y := rockchip_drm_drv.o rockchip_drm_fb.o \ - rockchip_drm_gem.o rockchip_drm_vop.o + rockchip_drm_gem.o rockchip_drm_psr.o rockchip_drm_vop.o rockchipdrm-$(CONFIG_DRM_FBDEV_EMULATION) += rockchip_drm_fbdev.o obj-$(CONFIG_ROCKCHIP_ANALOGIX_DP) += analogix_dp-rockchip.o diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c index d665fb0..26c12b3 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c @@ -156,6 +156,9 @@ static int rockchip_drm_bind(struct device *dev) drm_dev->dev_private = private; + INIT_LIST_HEAD(&private->psr_list); + mutex_init(&private->psr_list_mutex); + drm_mode_config_init(drm_dev); rockchip_drm_mode_config_init(drm_dev); @@ -218,6 +221,7 @@ static int rockchip_drm_bind(struct device *dev) if (is_support_iommu) arm_iommu_release_mapping(mapping); + return 0; err_fbdev_fini: rockchip_drm_fbdev_fini(drm_dev); diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h index 239b830..9c34c9e 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h @@ -61,6 +61,9 @@ struct rockchip_drm_private { struct drm_gem_object *fbdev_bo; const struct rockchip_crtc_funcs *crtc_funcs[ROCKCHIP_MAX_CRTC]; struct drm_atomic_state *state; + + struct list_head psr_list; + struct mutex psr_list_mutex; }; int rockchip_register_crtc_funcs(struct drm_crtc *crtc, diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c index 20f12bc..36afd9c 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c @@ -21,6 +21,7 @@ #include "rockchip_drm_drv.h" #include "rockchip_drm_gem.h" +#include "rockchip_drm_psr.h" #define to_rockchip_fb(x) container_of(x, struct rockchip_drm_fb, fb) @@ -66,9 +67,20 @@ static int rockchip_drm_fb_create_handle(struct drm_framebuffer *fb, rockchip_fb->obj[0], handle); } +static int rockchip_drm_fb_dirty(struct drm_framebuffer *fb, + struct drm_file *file, + unsigned int flags, unsigned int color, + struct drm_clip_rect *clips, + unsigned int num_clips) +{ + rockchip_drm_psr_flush(fb->dev); + return 0; +} + static const struct drm_framebuffer_funcs rockchip_drm_fb_funcs = { .destroy = rockchip_drm_fb_destroy, .create_handle = rockchip_drm_fb_create_handle, + .dirty = rockchip_drm_fb_dirty, }; static struct rockchip_drm_fb * diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c new file mode 100644 index 0000000..e79ea18 --- /dev/null +++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c @@ -0,0 +1,223 @@ +/* + * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd + * Author: Yakir Yang <ykk@rock-chips.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + */ + +#include <drm/drmP.h> +#include <drm/drm_crtc_helper.h> + +#include "rockchip_drm_drv.h" +#include "rockchip_drm_psr.h" + +#define PSR_FLUSH_TIMEOUT msecs_to_jiffies(3000) /* 3 seconds */ + +static LIST_HEAD(psr_list); +static DEFINE_MUTEX(psr_list_mutex); + +enum psr_state { + PSR_FLUSH, + PSR_ENABLE, + PSR_DISABLE, +}; + +struct psr_drv { + struct list_head list; + enum psr_state state; + struct mutex state_mutex; + + struct timer_list flush_timer; + + struct drm_encoder *encoder; + void (*set)(struct drm_encoder *encoder, bool enable); +}; + +static struct psr_drv *find_psr_by_crtc(struct drm_crtc *crtc) +{ + struct rockchip_drm_private *drm_drv = crtc->dev->dev_private; + struct psr_drv *psr; + + mutex_lock(&drm_drv->psr_list_mutex); + list_for_each_entry(psr, &drm_drv->psr_list, list) { + if (psr->encoder->crtc == crtc) { + mutex_unlock(&drm_drv->psr_list_mutex); + return psr; + } + } + mutex_unlock(&drm_drv->psr_list_mutex); + + return ERR_PTR(-ENODEV); +} + +static void psr_set_state(struct psr_drv *psr, enum psr_state state) +{ + mutex_lock(&psr->state_mutex); + + if (psr->state == state) { + mutex_unlock(&psr->state_mutex); + return; + } + + psr->state = state; + switch (state) { + case PSR_ENABLE: + psr->set(psr->encoder, true); + break; + + case PSR_DISABLE: + case PSR_FLUSH: + psr->set(psr->encoder, false); + break; + }; + + mutex_unlock(&psr->state_mutex); +} + +static void psr_flush_handler(unsigned long data) +{ + struct psr_drv *psr = (struct psr_drv *)data; + + if (!psr || psr->state != PSR_FLUSH) + return; + + psr_set_state(psr, PSR_ENABLE); +} + +/** + * rockchip_drm_psr_enable - enable the encoder PSR which bind to given CRTC + * @crtc: CRTC to obtain the PSR encoder + * + * Returns: + * Zero on success, negative errno on failure. + */ +int rockchip_drm_psr_enable(struct drm_crtc *crtc) +{ + struct psr_drv *psr = find_psr_by_crtc(crtc); + + if (IS_ERR(psr)) + return PTR_ERR(psr); + + psr_set_state(psr, PSR_ENABLE); + return 0; +} +EXPORT_SYMBOL(rockchip_drm_psr_enable); + +/** + * rockchip_drm_psr_disable - disable the encoder PSR which bind to given CRTC + * @crtc: CRTC to obtain the PSR encoder + * + * Returns: + * Zero on success, negative errno on failure. + */ +int rockchip_drm_psr_disable(struct drm_crtc *crtc) +{ + struct psr_drv *psr = find_psr_by_crtc(crtc); + + if (IS_ERR(psr)) + return PTR_ERR(psr); + + psr_set_state(psr, PSR_DISABLE); + return 0; +} +EXPORT_SYMBOL(rockchip_drm_psr_disable); + +/** + * rockchip_drm_psr_flush - force to flush all registered PSR encoders + * @dev: drm device + * + * Disable the PSR function for all registered encoders, and then enable the + * PSR function back after PSR_FLUSH_TIMEOUT. If encoder PSR state have been + * changed during flush time, then keep the state no change after flush + * timeout. + * + * Returns: + * Zero on success, negative errno on failure. + */ +void rockchip_drm_psr_flush(struct drm_device *dev) +{ + struct rockchip_drm_private *drm_drv = dev->dev_private; + struct psr_drv *psr; + + mutex_lock(&drm_drv->psr_list_mutex); + list_for_each_entry(psr, &drm_drv->psr_list, list) { + if (psr->state == PSR_DISABLE) + continue; + + mod_timer(&psr->flush_timer, + round_jiffies_up(jiffies + PSR_FLUSH_TIMEOUT)); + + psr_set_state(psr, PSR_FLUSH); + } + mutex_unlock(&drm_drv->psr_list_mutex); +} +EXPORT_SYMBOL(rockchip_drm_psr_flush); + +/** + * rockchip_drm_psr_register - register encoder to psr driver + * @encoder: encoder that obtain the PSR function + * @psr_set: call back to set PSR state + * + * Returns: + * Zero on success, negative errno on failure. + */ +int rockchip_drm_psr_register(struct drm_encoder *encoder, + void (*psr_set)(struct drm_encoder *, bool enable)) +{ + struct rockchip_drm_private *drm_drv = encoder->dev->dev_private; + struct psr_drv *psr; + + if (!encoder || !psr_set) + return -EINVAL; + + psr = kzalloc(sizeof(struct psr_drv), GFP_KERNEL); + if (!psr) + return -ENOMEM; + + setup_timer(&psr->flush_timer, psr_flush_handler, (unsigned long)psr); + + mutex_init(&psr->state_mutex); + + psr->state = PSR_DISABLE; + psr->encoder = encoder; + psr->set = psr_set; + + mutex_lock(&drm_drv->psr_list_mutex); + list_add_tail(&psr->list, &drm_drv->psr_list); + mutex_unlock(&drm_drv->psr_list_mutex); + + return 0; +} +EXPORT_SYMBOL(rockchip_drm_psr_register); + +/** + * rockchip_drm_psr_unregister - unregister encoder to psr driver + * @encoder: encoder that obtain the PSR function + * @psr_set: call back to set PSR state + * + * Returns: + * Zero on success, negative errno on failure. + */ +void rockchip_drm_psr_unregister(struct drm_encoder *encoder) +{ + struct rockchip_drm_private *drm_drv = encoder->dev->dev_private; + struct psr_drv *psr; + + mutex_lock(&drm_drv->psr_list_mutex); + list_for_each_entry(psr, &drm_drv->psr_list, list) { + if (psr->encoder == encoder) { + del_timer(&psr->flush_timer); + list_del(&psr->list); + kfree(psr); + } + } + mutex_unlock(&drm_drv->psr_list_mutex); +} +EXPORT_SYMBOL(rockchip_drm_psr_unregister); diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.h b/drivers/gpu/drm/rockchip/rockchip_drm_psr.h new file mode 100644 index 0000000..c35b688 --- /dev/null +++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.h @@ -0,0 +1,26 @@ +/* + * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd + * Author: Yakir Yang <ykk@rock-chips.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + */ + +#ifndef __ROCKCHIP_DRM_PSR___ +#define __ROCKCHIP_DRM_PSR___ + +void rockchip_drm_psr_flush(struct drm_device *dev); +int rockchip_drm_psr_enable(struct drm_crtc *crtc); +int rockchip_drm_psr_disable(struct drm_crtc *crtc); + +int rockchip_drm_psr_register(struct drm_encoder *encoder, + void (*psr_set)(struct drm_encoder *, bool enable)); +void rockchip_drm_psr_unregister(struct drm_encoder *encoder); + +#endif /* __ROCKCHIP_DRM_PSR__ */ diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c index 69d32f1..e702fb3 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c @@ -34,6 +34,7 @@ #include "rockchip_drm_drv.h" #include "rockchip_drm_gem.h" #include "rockchip_drm_fb.h" +#include "rockchip_drm_psr.h" #include "rockchip_drm_vop.h" #define __REG_SET_RELAXED(x, off, mask, shift, v, write_mask) \ @@ -87,6 +88,8 @@ #define to_vop_win(x) container_of(x, struct vop_win, base) #define to_vop_plane_state(x) container_of(x, struct vop_plane_state, base) +#define VOP_PSR_SET_DELAY_TIME msecs_to_jiffies(10) + struct vop_plane_state { struct drm_plane_state base; int format; @@ -121,6 +124,9 @@ struct vop { /* protected by dev->event_lock */ struct drm_pending_vblank_event *event; + bool psr_enabled; + struct delayed_work psr_work; + struct completion line_flag_completion; const struct vop_data *data; @@ -629,6 +635,9 @@ static void vop_crtc_disable(struct drm_crtc *crtc) crtc->state->event = NULL; } + + vop->psr_enabled = false; + INIT_DELAYED_WORK(&vop->psr_work, vop_psr_work); } static void vop_plane_destroy(struct drm_plane *plane) @@ -923,6 +932,16 @@ static const struct drm_plane_funcs vop_plane_funcs = { .atomic_destroy_state = vop_atomic_plane_destroy_state, }; +static void vop_psr_work(struct work_struct *work) +{ + struct vop *vop = container_of(work, typeof(*vop), psr_work.work); + + if (vop->psr_enabled) + rockchip_drm_psr_enable(&vop->crtc); + else + rockchip_drm_psr_disable(&vop->crtc); +} + static int vop_crtc_enable_vblank(struct drm_crtc *crtc) { struct vop *vop = to_vop(crtc); @@ -937,6 +956,9 @@ static int vop_crtc_enable_vblank(struct drm_crtc *crtc) spin_unlock_irqrestore(&vop->irq_lock, flags); + vop->psr_enabled = false; + schedule_delayed_work(&vop->psr_work, VOP_PSR_SET_DELAY_TIME); + return 0; } @@ -953,6 +975,9 @@ static void vop_crtc_disable_vblank(struct drm_crtc *crtc) VOP_INTR_SET_TYPE(vop, enable, FS_INTR, 0); spin_unlock_irqrestore(&vop->irq_lock, flags); + + vop->psr_enabled = true; + schedule_delayed_work(&vop->psr_work, VOP_PSR_SET_DELAY_TIME); } static void vop_crtc_wait_for_update(struct drm_crtc *crtc) @@ -1597,6 +1622,10 @@ static int vop_bind(struct device *dev, struct device *master, void *data) return ret; pm_runtime_enable(&pdev->dev); + + vop->psr_enabled = false; + INIT_DELAYED_WORK(&vop->psr_work, vop_psr_work); + return 0; }
The PSR driver have exported four symbols for specific device driver: - rockchip_drm_psr_register() - rockchip_drm_psr_unregister() - rockchip_drm_psr_enable() - rockchip_drm_psr_disable() - rockchip_drm_psr_flush() Encoder driver should call the register/unregister interfaces to hook itself into common PSR driver, encoder have implement the 'psr_set' callback which use the set PSR state in hardware side. Crtc driver would call the enable/disable interfaces when vblank is enable/disable, after that the common PSR driver would call the encoder registered callback to set the PSR state. Fb driver would call the flush interface in 'fb->dirty' callback, this helper function would force all PSR enabled encoders to exit from PSR for 3 seconds. Signed-off-by: Yakir Yang <ykk@rock-chips.com> --- Changes in v4: - Tuck the global "psr_list" & "psr_list_mutex" in struct rockchip_drm_private. (Sean) - Move the access of "psr->state" under "psr->state_mutex"'s protect. (Sean) - Let "psr->state = PSR_FLUSH" under "psr->state_mutex"'s protect. (Sean) - Collect psr_enable() and psr_disable() into psr_set_state() - s/5\ second/PSR_FLUSH_TIMEOUT/ (Sean) - Flush the psr callback in vop_crtc_disable(). (Stéphane, reviewed in Google gerrit) [https://chromium-review.googlesource.com/#/c/349084/6/drivers/gpu/drm/rockchip/rockchip_drm_vop.c@475] - Add the missing file head with license. (Stéphane, reviewed in Google gerrit) [https://chromium-review.googlesource.com/#/c/357563/1/drivers/gpu/drm/rockchip/rockchip_drm_psr.h@3] Changes in v3: - split the psr flow into an common abstracted PSR driver - implement the 'fb->dirty' callback function (Daniel) - avoid to use notify to acqiure for vact event (Daniel) - remove psr_active() callback which introduce in v2 Changes in v2: None drivers/gpu/drm/rockchip/Makefile | 2 +- drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 4 + drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 3 + drivers/gpu/drm/rockchip/rockchip_drm_fb.c | 12 ++ drivers/gpu/drm/rockchip/rockchip_drm_psr.c | 223 ++++++++++++++++++++++++++++ drivers/gpu/drm/rockchip/rockchip_drm_psr.h | 26 ++++ drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 29 ++++ 7 files changed, 298 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/rockchip/rockchip_drm_psr.c create mode 100644 drivers/gpu/drm/rockchip/rockchip_drm_psr.h