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2e54ff0e54
(re)assign the hw overlays to planes based on required caps, and to handle situations where we could not modify an in-use plane. This means all planes advertise the superset of formats and properties. Userspace must (as always) use atomic TEST_ONLY step for atomic updates, as not all planes may be available for use on every frame. The mapping of hwoverlays to plane is stored in omap_global_state, so that state updates are atomically committed in the same way that plane/etc state updates are managed. This is needed because the omap_plane_state keeps a pointer to the hwoverlay, and we don't want global state to become out of sync with the plane state if an atomic update fails, we hit deadlock/ backoff scenario, etc. The use of global_state_lock keeps multiple parallel updates which both re-assign hwoverlays properly serialized. Signed-off-by: Benoit Parrot <bparrot@ti.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211117141928.771082-8-narmstrong@baylibre.com
112 lines
2.6 KiB
C
112 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
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* Author: Rob Clark <rob@ti.com>
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*/
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#ifndef __OMAPDRM_DRV_H__
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#define __OMAPDRM_DRV_H__
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/workqueue.h>
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#include "dss/omapdss.h"
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#include "dss/dss.h"
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#include <drm/drm_atomic.h>
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#include <drm/drm_gem.h>
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#include <drm/omap_drm.h>
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#include "omap_crtc.h"
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#include "omap_encoder.h"
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#include "omap_fb.h"
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#include "omap_fbdev.h"
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#include "omap_gem.h"
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#include "omap_irq.h"
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#include "omap_plane.h"
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#include "omap_overlay.h"
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#define DBG(fmt, ...) DRM_DEBUG_DRIVER(fmt"\n", ##__VA_ARGS__)
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#define VERB(fmt, ...) if (0) DRM_DEBUG_DRIVER(fmt, ##__VA_ARGS__) /* verbose debug */
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#define MODULE_NAME "omapdrm"
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struct omap_drm_usergart;
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struct omap_drm_pipeline {
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struct drm_crtc *crtc;
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struct drm_encoder *encoder;
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struct drm_connector *connector;
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struct omap_dss_device *output;
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unsigned int alias_id;
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};
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/*
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* Global private object state for tracking resources that are shared across
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* multiple kms objects (planes/crtcs/etc).
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*/
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#define to_omap_global_state(x) container_of(x, struct omap_global_state, base)
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struct omap_global_state {
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struct drm_private_state base;
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/* global atomic state of assignment between overlays and planes */
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struct drm_plane *hwoverlay_to_plane[8];
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};
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struct omap_drm_private {
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struct drm_device *ddev;
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struct device *dev;
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u32 omaprev;
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struct dss_device *dss;
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struct dispc_device *dispc;
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bool irq_enabled;
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unsigned int num_pipes;
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struct omap_drm_pipeline pipes[8];
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struct omap_drm_pipeline *channels[8];
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unsigned int num_planes;
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struct drm_plane *planes[8];
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unsigned int num_ovls;
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struct omap_hw_overlay *overlays[8];
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struct drm_private_obj glob_obj;
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struct drm_fb_helper *fbdev;
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struct workqueue_struct *wq;
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/* lock for obj_list below */
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struct mutex list_lock;
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/* list of GEM objects: */
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struct list_head obj_list;
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struct omap_drm_usergart *usergart;
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bool has_dmm;
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/* properties: */
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struct drm_property *zorder_prop;
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/* irq handling: */
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spinlock_t wait_lock; /* protects the wait_list */
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struct list_head wait_list; /* list of omap_irq_wait */
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u32 irq_mask; /* enabled irqs in addition to wait_list */
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/* memory bandwidth limit if it is needed on the platform */
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unsigned int max_bandwidth;
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};
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void omap_debugfs_init(struct drm_minor *minor);
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struct omap_global_state * __must_check omap_get_global_state(struct drm_atomic_state *s);
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struct omap_global_state *omap_get_existing_global_state(struct omap_drm_private *priv);
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#endif /* __OMAPDRM_DRV_H__ */
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