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linux/drivers/gpu/drm/rockchip/rockchip_drm_psr.h

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drm/rockchip: add an common abstracted PSR driver The PSR driver have exported four symbols for specific device driver, and it's safe to call them in interrupt context: - 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> [seanpaul removed leftover psr_enabled/psr_work kruft from drm_vop.c] Signed-off-by: Sean Paul <seanpaul@chromium.org>
2016-07-24 06:57:44 +00:00
/*
* 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___
drm/rockchip: Don't key off vblank for psr Instead of keying off vblank for psr, just flush every time we get an atomic update. This ensures that cursor updates will properly disable psr (without turning vblank on/off), and unifies the paths between fb_dirty and atomic psr enable/disable. Reviewed-by: Yakir Yang <ykk@rock-chips.com> Signed-off-by: Sean Paul <seanpaul@chromium.org>
2016-08-18 19:01:46 +00:00
void rockchip_drm_psr_flush_all(struct drm_device *dev);
drm/rockchip: psr: Sanitize semantics of allow/inhibit API Currently both rockchip_drm_psr_activate() and _deactivate() only set the boolean "active" flag without actually making sure that hardware state complies with it. Since we are going to extend the usage of this API to properly lock PSR for the duration of atomic commits, we change the semantics in following way: - a counter is used to track the number of inhibit requests, - PSR is actually disabled in hardware on first inhibit request, - PSR enable work is scheduled on last allow request. The above allows using the API as a way to deterministically synchronize PSR state changes with other DRM events, i.e. atomic commits and cursor updates. As a nice side effect, the naming is sorted out and we have "inhibit" for stopping the software logic and "enable" for hardware state. Signed-off-by: Tomasz Figa <tfiga@chromium.org> Signed-off-by: Thierry Escande <thierry.escande@collabora.com> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180423105003.9004-26-enric.balletbo@collabora.com
2018-04-23 10:50:01 +00:00
int rockchip_drm_psr_inhibit_put(struct drm_encoder *encoder);
int rockchip_drm_psr_inhibit_get(struct drm_encoder *encoder);
drm/rockchip: add an common abstracted PSR driver The PSR driver have exported four symbols for specific device driver, and it's safe to call them in interrupt context: - 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> [seanpaul removed leftover psr_enabled/psr_work kruft from drm_vop.c] Signed-off-by: Sean Paul <seanpaul@chromium.org>
2016-07-24 06:57:44 +00:00
int rockchip_drm_psr_register(struct drm_encoder *encoder,
drm/rockchip: Restore psr->state when enable/disable psr failed If we failed disable psr, it would hang the display until next psr cycle coming. So we should restore psr->state when it failed. Cc: Tomasz Figa <tfiga@chromium.org> Signed-off-by: zain wang <wzz@rock-chips.com> Signed-off-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Thierry Escande <thierry.escande@collabora.com> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180423105003.9004-14-enric.balletbo@collabora.com
2018-04-23 10:49:49 +00:00
int (*psr_set)(struct drm_encoder *, bool enable));
drm/rockchip: add an common abstracted PSR driver The PSR driver have exported four symbols for specific device driver, and it's safe to call them in interrupt context: - 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> [seanpaul removed leftover psr_enabled/psr_work kruft from drm_vop.c] Signed-off-by: Sean Paul <seanpaul@chromium.org>
2016-07-24 06:57:44 +00:00
void rockchip_drm_psr_unregister(struct drm_encoder *encoder);
#endif /* __ROCKCHIP_DRM_PSR__ */
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