We'd previously moved the pipe_lock spinlock to the hwpipe struct. Bring
it back to mdp5_plane. We will need this because an mdp5_plane in the
future could comprise of 2 hw pipes. It makes more sense to have a single
lock to protect the registers for the hw pipes used by a plane, rather
than trying to take individual locks per hwpipe when committing a
configuration.
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
These are various changes added in preparation for cursor planes:
- Add a pipe_cursor block for 8x96 in mdp5_cfg.
- Add a new pipe CAP called MDP_PIPE_CAP_CURSOR. Use this to ensure we
assign a cursor SSPP for a drm_plane with type DRM_PLANE_TYPE_CURSOR.
- Update mdp5_ctl_blend_mask/ext_blend_mask funcs to incorporate cursor
SSPPs.
- In mdp5_ctl_blend, iterate through MAX_STAGES instead of stage_cnt,
we need to do this because we can now have empty stages in between.
- In mdp5_crtc_atomic_check, make sure that the cursor plane has the
highest zorder, and stage the cursor plane to the maximum stage #
present on the HW.
- Create drm_crtc_funcs that doesn't try to implement cursors using the
older LM cursor HW.
- Pass drm_plane_type in mdp5_plane_init instead of a bool telling
whether plane is primary or not.
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
Previously, SMP block allocation was not checked in the plane's
atomic_check() fxn, so we could fail allocation SMP block allocation at
atomic_update() time. Re-work the block allocation to request blocks
during atomic_check(), but not update the hw until committing the atomic
update.
Since SMP blocks allocated at atomic_check() time, we need to manage the
SMP state as part of mdp5_state (global atomic state). This actually
ends up significantly simplifying the SMP management, as the SMP module
does not need to manage the intermediate state between assigning new
blocks before setting flush bits and releasing old blocks after vblank.
(The SMP registers and SMP allocation is not double-buffered, so newly
allocated blocks need to be updated in kms->prepare_commit() released
blocks in kms->complete_commit().)
Signed-off-by: Rob Clark <robdclark@gmail.com>
(re)assign the hw pipes to planes based on required caps, and to handle
situations where we could not modify an in-use plane (ie. SMP block
reallocation).
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 hwpipe to plane is stored in mdp5_state, so that state
updates are atomically committed in the same way that plane/etc state
updates are managed. This is needed because the mdp5_plane_state keeps
a pointer to the hwpipe, 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 state_lock keeps multiple parallel
updates which both re-assign hwpipes properly serialized.
Signed-off-by: Rob Clark <robdclark@gmail.com>
Split out the hardware pipe specifics from mdp5_plane. To start, the hw
pipes are statically assigned to planes, but next step is to assign the
hw pipes during plane->atomic_check() based on requested caps (scaling,
YUV, etc). And then hw pipe re-assignment if required if required SMP
blocks changes.
Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
