664 lines
23 KiB
C
664 lines
23 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#ifndef __DRM_MODE_CONFIG_H__
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#define __DRM_MODE_CONFIG_H__
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#include <linux/mutex.h>
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#include <linux/types.h>
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#include <linux/idr.h>
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#include <linux/workqueue.h>
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#include <drm/drm_modeset_lock.h>
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struct drm_file;
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struct drm_device;
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struct drm_atomic_state;
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struct drm_mode_fb_cmd2;
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/**
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* struct drm_mode_config_funcs - basic driver provided mode setting functions
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*
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* Some global (i.e. not per-CRTC, connector, etc) mode setting functions that
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* involve drivers.
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*/
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struct drm_mode_config_funcs {
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/**
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* @fb_create:
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*
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* Create a new framebuffer object. The core does basic checks on the
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* requested metadata, but most of that is left to the driver. See
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* struct &drm_mode_fb_cmd2 for details.
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*
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* If the parameters are deemed valid and the backing storage objects in
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* the underlying memory manager all exist, then the driver allocates
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* a new &drm_framebuffer structure, subclassed to contain
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* driver-specific information (like the internal native buffer object
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* references). It also needs to fill out all relevant metadata, which
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* should be done by calling drm_helper_mode_fill_fb_struct().
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*
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* The initialization is finalized by calling drm_framebuffer_init(),
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* which registers the framebuffer and makes it accessible to other
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* threads.
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*
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* RETURNS:
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*
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* A new framebuffer with an initial reference count of 1 or a negative
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* error code encoded with ERR_PTR().
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*/
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struct drm_framebuffer *(*fb_create)(struct drm_device *dev,
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struct drm_file *file_priv,
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const struct drm_mode_fb_cmd2 *mode_cmd);
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/**
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* @output_poll_changed:
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*
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* Callback used by helpers to inform the driver of output configuration
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* changes.
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*
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* Drivers implementing fbdev emulation with the helpers can call
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* drm_fb_helper_hotplug_changed from this hook to inform the fbdev
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* helper of output changes.
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*
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* FIXME:
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*
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* Except that there's no vtable for device-level helper callbacks
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* there's no reason this is a core function.
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*/
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void (*output_poll_changed)(struct drm_device *dev);
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/**
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* @atomic_check:
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*
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* This is the only hook to validate an atomic modeset update. This
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* function must reject any modeset and state changes which the hardware
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* or driver doesn't support. This includes but is of course not limited
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* to:
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*
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* - Checking that the modes, framebuffers, scaling and placement
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* requirements and so on are within the limits of the hardware.
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*
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* - Checking that any hidden shared resources are not oversubscribed.
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* This can be shared PLLs, shared lanes, overall memory bandwidth,
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* display fifo space (where shared between planes or maybe even
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* CRTCs).
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*
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* - Checking that virtualized resources exported to userspace are not
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* oversubscribed. For various reasons it can make sense to expose
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* more planes, crtcs or encoders than which are physically there. One
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* example is dual-pipe operations (which generally should be hidden
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* from userspace if when lockstepped in hardware, exposed otherwise),
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* where a plane might need 1 hardware plane (if it's just on one
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* pipe), 2 hardware planes (when it spans both pipes) or maybe even
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* shared a hardware plane with a 2nd plane (if there's a compatible
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* plane requested on the area handled by the other pipe).
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*
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* - Check that any transitional state is possible and that if
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* requested, the update can indeed be done in the vblank period
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* without temporarily disabling some functions.
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*
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* - Check any other constraints the driver or hardware might have.
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*
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* - This callback also needs to correctly fill out the &drm_crtc_state
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* in this update to make sure that drm_atomic_crtc_needs_modeset()
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* reflects the nature of the possible update and returns true if and
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* only if the update cannot be applied without tearing within one
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* vblank on that CRTC. The core uses that information to reject
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* updates which require a full modeset (i.e. blanking the screen, or
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* at least pausing updates for a substantial amount of time) if
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* userspace has disallowed that in its request.
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*
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* - The driver also does not need to repeat basic input validation
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* like done for the corresponding legacy entry points. The core does
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* that before calling this hook.
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*
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* See the documentation of @atomic_commit for an exhaustive list of
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* error conditions which don't have to be checked at the
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* ->atomic_check() stage?
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*
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* See the documentation for struct &drm_atomic_state for how exactly
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* an atomic modeset update is described.
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*
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* Drivers using the atomic helpers can implement this hook using
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* drm_atomic_helper_check(), or one of the exported sub-functions of
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* it.
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*
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* RETURNS:
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*
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* 0 on success or one of the below negative error codes:
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*
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* - -EINVAL, if any of the above constraints are violated.
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*
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* - -EDEADLK, when returned from an attempt to acquire an additional
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* &drm_modeset_lock through drm_modeset_lock().
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*
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* - -ENOMEM, if allocating additional state sub-structures failed due
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* to lack of memory.
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*
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* - -EINTR, -EAGAIN or -ERESTARTSYS, if the IOCTL should be restarted.
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* This can either be due to a pending signal, or because the driver
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* needs to completely bail out to recover from an exceptional
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* situation like a GPU hang. From a userspace point all errors are
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* treated equally.
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*/
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int (*atomic_check)(struct drm_device *dev,
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struct drm_atomic_state *state);
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/**
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* @atomic_commit:
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*
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* This is the only hook to commit an atomic modeset update. The core
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* guarantees that @atomic_check has been called successfully before
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* calling this function, and that nothing has been changed in the
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* interim.
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*
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* See the documentation for struct &drm_atomic_state for how exactly
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* an atomic modeset update is described.
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*
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* Drivers using the atomic helpers can implement this hook using
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* drm_atomic_helper_commit(), or one of the exported sub-functions of
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* it.
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*
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* Nonblocking commits (as indicated with the nonblock parameter) must
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* do any preparatory work which might result in an unsuccessful commit
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* in the context of this callback. The only exceptions are hardware
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* errors resulting in -EIO. But even in that case the driver must
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* ensure that the display pipe is at least running, to avoid
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* compositors crashing when pageflips don't work. Anything else,
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* specifically committing the update to the hardware, should be done
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* without blocking the caller. For updates which do not require a
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* modeset this must be guaranteed.
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*
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* The driver must wait for any pending rendering to the new
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* framebuffers to complete before executing the flip. It should also
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* wait for any pending rendering from other drivers if the underlying
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* buffer is a shared dma-buf. Nonblocking commits must not wait for
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* rendering in the context of this callback.
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*
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* An application can request to be notified when the atomic commit has
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* completed. These events are per-CRTC and can be distinguished by the
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* CRTC index supplied in &drm_event to userspace.
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*
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* The drm core will supply a struct &drm_event in the event
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* member of each CRTC's &drm_crtc_state structure. See the
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* documentation for &drm_crtc_state for more details about the precise
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* semantics of this event.
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*
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* NOTE:
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*
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* Drivers are not allowed to shut down any display pipe successfully
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* enabled through an atomic commit on their own. Doing so can result in
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* compositors crashing if a page flip is suddenly rejected because the
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* pipe is off.
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*
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* RETURNS:
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*
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* 0 on success or one of the below negative error codes:
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*
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* - -EBUSY, if a nonblocking updated is requested and there is
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* an earlier updated pending. Drivers are allowed to support a queue
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* of outstanding updates, but currently no driver supports that.
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* Note that drivers must wait for preceding updates to complete if a
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* synchronous update is requested, they are not allowed to fail the
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* commit in that case.
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*
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* - -ENOMEM, if the driver failed to allocate memory. Specifically
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* this can happen when trying to pin framebuffers, which must only
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* be done when committing the state.
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*
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* - -ENOSPC, as a refinement of the more generic -ENOMEM to indicate
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* that the driver has run out of vram, iommu space or similar GPU
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* address space needed for framebuffer.
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*
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* - -EIO, if the hardware completely died.
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*
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* - -EINTR, -EAGAIN or -ERESTARTSYS, if the IOCTL should be restarted.
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* This can either be due to a pending signal, or because the driver
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* needs to completely bail out to recover from an exceptional
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* situation like a GPU hang. From a userspace point of view all errors are
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* treated equally.
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*
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* This list is exhaustive. Specifically this hook is not allowed to
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* return -EINVAL (any invalid requests should be caught in
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* @atomic_check) or -EDEADLK (this function must not acquire
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* additional modeset locks).
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*/
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int (*atomic_commit)(struct drm_device *dev,
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struct drm_atomic_state *state,
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bool nonblock);
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/**
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* @atomic_state_alloc:
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*
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* This optional hook can be used by drivers that want to subclass struct
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* &drm_atomic_state to be able to track their own driver-private global
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* state easily. If this hook is implemented, drivers must also
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* implement @atomic_state_clear and @atomic_state_free.
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*
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* RETURNS:
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*
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* A new &drm_atomic_state on success or NULL on failure.
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*/
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struct drm_atomic_state *(*atomic_state_alloc)(struct drm_device *dev);
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/**
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* @atomic_state_clear:
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*
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* This hook must clear any driver private state duplicated into the
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* passed-in &drm_atomic_state. This hook is called when the caller
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* encountered a &drm_modeset_lock deadlock and needs to drop all
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* already acquired locks as part of the deadlock avoidance dance
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* implemented in drm_modeset_lock_backoff().
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*
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* Any duplicated state must be invalidated since a concurrent atomic
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* update might change it, and the drm atomic interfaces always apply
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* updates as relative changes to the current state.
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*
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* Drivers that implement this must call drm_atomic_state_default_clear()
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* to clear common state.
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*/
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void (*atomic_state_clear)(struct drm_atomic_state *state);
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/**
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* @atomic_state_free:
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*
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* This hook needs driver private resources and the &drm_atomic_state
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* itself. Note that the core first calls drm_atomic_state_clear() to
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* avoid code duplicate between the clear and free hooks.
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*
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* Drivers that implement this must call drm_atomic_state_default_free()
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* to release common resources.
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*/
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void (*atomic_state_free)(struct drm_atomic_state *state);
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};
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/**
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* struct drm_mode_config - Mode configuration control structure
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* @mutex: mutex protecting KMS related lists and structures
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* @connection_mutex: ww mutex protecting connector state and routing
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* @acquire_ctx: global implicit acquire context used by atomic drivers for
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* legacy IOCTLs
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* @fb_lock: mutex to protect fb state and lists
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* @num_fb: number of fbs available
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* @fb_list: list of framebuffers available
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* @num_encoder: number of encoders on this device
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* @encoder_list: list of encoder objects
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* @num_overlay_plane: number of overlay planes on this device
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* @num_total_plane: number of universal (i.e. with primary/curso) planes on this device
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* @plane_list: list of plane objects
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* @num_crtc: number of CRTCs on this device
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* @crtc_list: list of CRTC objects
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* @property_list: list of property objects
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* @min_width: minimum pixel width on this device
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* @min_height: minimum pixel height on this device
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* @max_width: maximum pixel width on this device
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* @max_height: maximum pixel height on this device
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* @funcs: core driver provided mode setting functions
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* @fb_base: base address of the framebuffer
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* @poll_enabled: track polling support for this device
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* @poll_running: track polling status for this device
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* @delayed_event: track delayed poll uevent deliver for this device
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* @output_poll_work: delayed work for polling in process context
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* @property_blob_list: list of all the blob property objects
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* @blob_lock: mutex for blob property allocation and management
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* @*_property: core property tracking
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* @preferred_depth: preferred RBG pixel depth, used by fb helpers
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* @prefer_shadow: hint to userspace to prefer shadow-fb rendering
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* @cursor_width: hint to userspace for max cursor width
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* @cursor_height: hint to userspace for max cursor height
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* @helper_private: mid-layer private data
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*
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* Core mode resource tracking structure. All CRTC, encoders, and connectors
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* enumerated by the driver are added here, as are global properties. Some
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* global restrictions are also here, e.g. dimension restrictions.
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*/
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struct drm_mode_config {
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struct mutex mutex; /* protects configuration (mode lists etc.) */
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struct drm_modeset_lock connection_mutex; /* protects connector->encoder and encoder->crtc links */
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struct drm_modeset_acquire_ctx *acquire_ctx; /* for legacy _lock_all() / _unlock_all() */
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/**
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* @idr_mutex:
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*
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* Mutex for KMS ID allocation and management. Protects both @crtc_idr
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* and @tile_idr.
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*/
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struct mutex idr_mutex;
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/**
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* @crtc_idr:
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*
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* Main KMS ID tracking object. Use this idr for all IDs, fb, crtc,
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* connector, modes - just makes life easier to have only one.
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*/
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struct idr crtc_idr;
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/**
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* @tile_idr:
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*
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* Use this idr for allocating new IDs for tiled sinks like use in some
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* high-res DP MST screens.
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*/
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struct idr tile_idr;
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struct mutex fb_lock; /* proctects global and per-file fb lists */
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int num_fb;
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struct list_head fb_list;
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/**
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* @num_connector: Number of connectors on this device.
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*/
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int num_connector;
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/**
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* @connector_ida: ID allocator for connector indices.
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*/
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struct ida connector_ida;
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/**
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* @connector_list: List of connector objects.
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*/
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struct list_head connector_list;
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int num_encoder;
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struct list_head encoder_list;
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/*
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* Track # of overlay planes separately from # of total planes. By
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* default we only advertise overlay planes to userspace; if userspace
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* sets the "universal plane" capability bit, we'll go ahead and
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* expose all planes.
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*/
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int num_overlay_plane;
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int num_total_plane;
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struct list_head plane_list;
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int num_crtc;
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struct list_head crtc_list;
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struct list_head property_list;
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int min_width, min_height;
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int max_width, max_height;
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const struct drm_mode_config_funcs *funcs;
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resource_size_t fb_base;
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/* output poll support */
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bool poll_enabled;
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bool poll_running;
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bool delayed_event;
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struct delayed_work output_poll_work;
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struct mutex blob_lock;
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/* pointers to standard properties */
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struct list_head property_blob_list;
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/**
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* @edid_property: Default connector property to hold the EDID of the
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* currently connected sink, if any.
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*/
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struct drm_property *edid_property;
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/**
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* @dpms_property: Default connector property to control the
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* connector's DPMS state.
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*/
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struct drm_property *dpms_property;
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/**
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* @path_property: Default connector property to hold the DP MST path
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* for the port.
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*/
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struct drm_property *path_property;
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/**
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* @tile_property: Default connector property to store the tile
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* position of a tiled screen, for sinks which need to be driven with
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* multiple CRTCs.
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*/
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struct drm_property *tile_property;
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/**
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* @plane_type_property: Default plane property to differentiate
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* CURSOR, PRIMARY and OVERLAY legacy uses of planes.
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*/
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struct drm_property *plane_type_property;
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/**
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* @prop_src_x: Default atomic plane property for the plane source
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* position in the connected &drm_framebuffer.
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*/
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struct drm_property *prop_src_x;
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/**
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* @prop_src_y: Default atomic plane property for the plane source
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* position in the connected &drm_framebuffer.
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*/
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struct drm_property *prop_src_y;
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/**
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* @prop_src_w: Default atomic plane property for the plane source
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* position in the connected &drm_framebuffer.
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*/
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struct drm_property *prop_src_w;
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/**
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* @prop_src_h: Default atomic plane property for the plane source
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* position in the connected &drm_framebuffer.
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*/
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struct drm_property *prop_src_h;
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/**
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* @prop_crtc_x: Default atomic plane property for the plane destination
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* position in the &drm_crtc is is being shown on.
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*/
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struct drm_property *prop_crtc_x;
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/**
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* @prop_crtc_y: Default atomic plane property for the plane destination
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* position in the &drm_crtc is is being shown on.
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*/
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struct drm_property *prop_crtc_y;
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/**
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* @prop_crtc_w: Default atomic plane property for the plane destination
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* position in the &drm_crtc is is being shown on.
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*/
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struct drm_property *prop_crtc_w;
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/**
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* @prop_crtc_h: Default atomic plane property for the plane destination
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* position in the &drm_crtc is is being shown on.
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*/
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struct drm_property *prop_crtc_h;
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/**
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* @prop_fb_id: Default atomic plane property to specify the
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* &drm_framebuffer.
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*/
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|
struct drm_property *prop_fb_id;
|
|
/**
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* @prop_in_fence_fd: Sync File fd representing the incoming fences
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* for a Plane.
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*/
|
|
struct drm_property *prop_in_fence_fd;
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/**
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|
* @prop_out_fence_ptr: Sync File fd pointer representing the
|
|
* outgoing fences for a CRTC. Userspace should provide a pointer to a
|
|
* value of type s64, and then cast that pointer to u64.
|
|
*/
|
|
struct drm_property *prop_out_fence_ptr;
|
|
/**
|
|
* @prop_crtc_id: Default atomic plane property to specify the
|
|
* &drm_crtc.
|
|
*/
|
|
struct drm_property *prop_crtc_id;
|
|
/**
|
|
* @prop_active: Default atomic CRTC property to control the active
|
|
* state, which is the simplified implementation for DPMS in atomic
|
|
* drivers.
|
|
*/
|
|
struct drm_property *prop_active;
|
|
/**
|
|
* @prop_mode_id: Default atomic CRTC property to set the mode for a
|
|
* CRTC. A 0 mode implies that the CRTC is entirely disabled - all
|
|
* connectors must be of and active must be set to disabled, too.
|
|
*/
|
|
struct drm_property *prop_mode_id;
|
|
|
|
/**
|
|
* @dvi_i_subconnector_property: Optional DVI-I property to
|
|
* differentiate between analog or digital mode.
|
|
*/
|
|
struct drm_property *dvi_i_subconnector_property;
|
|
/**
|
|
* @dvi_i_select_subconnector_property: Optional DVI-I property to
|
|
* select between analog or digital mode.
|
|
*/
|
|
struct drm_property *dvi_i_select_subconnector_property;
|
|
|
|
/**
|
|
* @tv_subconnector_property: Optional TV property to differentiate
|
|
* between different TV connector types.
|
|
*/
|
|
struct drm_property *tv_subconnector_property;
|
|
/**
|
|
* @tv_select_subconnector_property: Optional TV property to select
|
|
* between different TV connector types.
|
|
*/
|
|
struct drm_property *tv_select_subconnector_property;
|
|
/**
|
|
* @tv_mode_property: Optional TV property to select
|
|
* the output TV mode.
|
|
*/
|
|
struct drm_property *tv_mode_property;
|
|
/**
|
|
* @tv_left_margin_property: Optional TV property to set the left
|
|
* margin.
|
|
*/
|
|
struct drm_property *tv_left_margin_property;
|
|
/**
|
|
* @tv_right_margin_property: Optional TV property to set the right
|
|
* margin.
|
|
*/
|
|
struct drm_property *tv_right_margin_property;
|
|
/**
|
|
* @tv_top_margin_property: Optional TV property to set the right
|
|
* margin.
|
|
*/
|
|
struct drm_property *tv_top_margin_property;
|
|
/**
|
|
* @tv_bottom_margin_property: Optional TV property to set the right
|
|
* margin.
|
|
*/
|
|
struct drm_property *tv_bottom_margin_property;
|
|
/**
|
|
* @tv_brightness_property: Optional TV property to set the
|
|
* brightness.
|
|
*/
|
|
struct drm_property *tv_brightness_property;
|
|
/**
|
|
* @tv_contrast_property: Optional TV property to set the
|
|
* contrast.
|
|
*/
|
|
struct drm_property *tv_contrast_property;
|
|
/**
|
|
* @tv_flicker_reduction_property: Optional TV property to control the
|
|
* flicker reduction mode.
|
|
*/
|
|
struct drm_property *tv_flicker_reduction_property;
|
|
/**
|
|
* @tv_overscan_property: Optional TV property to control the overscan
|
|
* setting.
|
|
*/
|
|
struct drm_property *tv_overscan_property;
|
|
/**
|
|
* @tv_saturation_property: Optional TV property to set the
|
|
* saturation.
|
|
*/
|
|
struct drm_property *tv_saturation_property;
|
|
/**
|
|
* @tv_hue_property: Optional TV property to set the hue.
|
|
*/
|
|
struct drm_property *tv_hue_property;
|
|
|
|
/**
|
|
* @scaling_mode_property: Optional connector property to control the
|
|
* upscaling, mostly used for built-in panels.
|
|
*/
|
|
struct drm_property *scaling_mode_property;
|
|
/**
|
|
* @aspect_ratio_property: Optional connector property to control the
|
|
* HDMI infoframe aspect ratio setting.
|
|
*/
|
|
struct drm_property *aspect_ratio_property;
|
|
/**
|
|
* @degamma_lut_property: Optional CRTC property to set the LUT used to
|
|
* convert the framebuffer's colors to linear gamma.
|
|
*/
|
|
struct drm_property *degamma_lut_property;
|
|
/**
|
|
* @degamma_lut_size_property: Optional CRTC property for the size of
|
|
* the degamma LUT as supported by the driver (read-only).
|
|
*/
|
|
struct drm_property *degamma_lut_size_property;
|
|
/**
|
|
* @ctm_property: Optional CRTC property to set the
|
|
* matrix used to convert colors after the lookup in the
|
|
* degamma LUT.
|
|
*/
|
|
struct drm_property *ctm_property;
|
|
/**
|
|
* @gamma_lut_property: Optional CRTC property to set the LUT used to
|
|
* convert the colors, after the CTM matrix, to the gamma space of the
|
|
* connected screen.
|
|
*/
|
|
struct drm_property *gamma_lut_property;
|
|
/**
|
|
* @gamma_lut_size_property: Optional CRTC property for the size of the
|
|
* gamma LUT as supported by the driver (read-only).
|
|
*/
|
|
struct drm_property *gamma_lut_size_property;
|
|
|
|
/**
|
|
* @suggested_x_property: Optional connector property with a hint for
|
|
* the position of the output on the host's screen.
|
|
*/
|
|
struct drm_property *suggested_x_property;
|
|
/**
|
|
* @suggested_y_property: Optional connector property with a hint for
|
|
* the position of the output on the host's screen.
|
|
*/
|
|
struct drm_property *suggested_y_property;
|
|
|
|
/* dumb ioctl parameters */
|
|
uint32_t preferred_depth, prefer_shadow;
|
|
|
|
/**
|
|
* @async_page_flip: Does this device support async flips on the primary
|
|
* plane?
|
|
*/
|
|
bool async_page_flip;
|
|
|
|
/**
|
|
* @allow_fb_modifiers:
|
|
*
|
|
* Whether the driver supports fb modifiers in the ADDFB2.1 ioctl call.
|
|
*/
|
|
bool allow_fb_modifiers;
|
|
|
|
/* cursor size */
|
|
uint32_t cursor_width, cursor_height;
|
|
|
|
struct drm_mode_config_helper_funcs *helper_private;
|
|
};
|
|
|
|
void drm_mode_config_init(struct drm_device *dev);
|
|
void drm_mode_config_reset(struct drm_device *dev);
|
|
void drm_mode_config_cleanup(struct drm_device *dev);
|
|
|
|
#endif
|