cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/msm/mdp/mdp5/mdp5_pipe.c

/*
 * Copyright (C) 2016 Red Hat
 * Author: Rob Clark <robdclark@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "mdp5_kms.h"


struct mdp5_hw_pipe *mdp5_pipe_assign(struct drm_atomic_state *s, struct drm_plane *plane, uint32_t caps, uint32_t blkcfg) { struct msm_drm_private *priv = s->dev->dev_private; struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(priv->kms)); struct mdp5_state *state; struct mdp5_hw_pipe_state *old_state, *new_state; struct mdp5_hw_pipe *hwpipe = NULL; int i; state = mdp5_get_state(s); if (IS_ERR(state)) return ERR_CAST(state); /* grab old_state after mdp5_get_state(), since now we hold lock: */ old_state = &mdp5_kms->state->hwpipe; new_state = &state->hwpipe; for (i = 0; i < mdp5_kms->num_hwpipes; i++) { struct mdp5_hw_pipe *cur = mdp5_kms->hwpipes[i]; /* skip if already in-use.. check both new and old state, * since we cannot immediately re-use a pipe that is * released in the current update in some cases: * (1) mdp5 can have SMP (non-double-buffered) * (2) hw pipe previously assigned to different CRTC * (vblanks might not be aligned) */ if (new_state->hwpipe_to_plane[cur->idx] || old_state->hwpipe_to_plane[cur->idx]) continue; /* skip if doesn't support some required caps: */ if (caps & ~cur->caps) continue; /* * don't assign a cursor pipe to a plane that isn't going to * be used as a cursor */ if (cur->caps & MDP_PIPE_CAP_CURSOR && plane->type != DRM_PLANE_TYPE_CURSOR) continue; /* possible candidate, take the one with the * fewest unneeded caps bits set: */ if (!hwpipe || (hweight_long(cur->caps & ~caps) < hweight_long(hwpipe->caps & ~caps))) hwpipe = cur; } if (!hwpipe) return ERR_PTR(-ENOMEM); if (mdp5_kms->smp) { int ret; DBG("%s: alloc SMP blocks", hwpipe->name); ret = mdp5_smp_assign(mdp5_kms->smp, &state->smp, hwpipe->pipe, blkcfg); if (ret) return ERR_PTR(-ENOMEM); hwpipe->blkcfg = blkcfg; } DBG("%s: assign to plane %s for caps %x", hwpipe->name, plane->name, caps); new_state->hwpipe_to_plane[hwpipe->idx] = plane; return hwpipe; }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark30194.95%266.67%
Archit Taneja165.05%133.33%
Total317100.00%3100.00%


void mdp5_pipe_release(struct drm_atomic_state *s, struct mdp5_hw_pipe *hwpipe) { struct msm_drm_private *priv = s->dev->dev_private; struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(priv->kms)); struct mdp5_state *state = mdp5_get_state(s); struct mdp5_hw_pipe_state *new_state = &state->hwpipe; if (!hwpipe) return; if (WARN_ON(!new_state->hwpipe_to_plane[hwpipe->idx])) return; DBG("%s: release from plane %s", hwpipe->name, new_state->hwpipe_to_plane[hwpipe->idx]->name); if (mdp5_kms->smp) { DBG("%s: free SMP blocks", hwpipe->name); mdp5_smp_release(mdp5_kms->smp, &state->smp, hwpipe->pipe); } new_state->hwpipe_to_plane[hwpipe->idx] = NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark147100.00%2100.00%
Total147100.00%2100.00%


void mdp5_pipe_destroy(struct mdp5_hw_pipe *hwpipe) { kfree(hwpipe); }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark15100.00%1100.00%
Total15100.00%1100.00%


struct mdp5_hw_pipe *mdp5_pipe_init(enum mdp5_pipe pipe, uint32_t reg_offset, uint32_t caps) { struct mdp5_hw_pipe *hwpipe; hwpipe = kzalloc(sizeof(*hwpipe), GFP_KERNEL); if (!hwpipe) return ERR_PTR(-ENOMEM); hwpipe->name = pipe2name(pipe); hwpipe->pipe = pipe; hwpipe->reg_offset = reg_offset; hwpipe->caps = caps; hwpipe->flush_mask = mdp_ctl_flush_mask_pipe(pipe); spin_lock_init(&hwpipe->pipe_lock); return hwpipe; }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark94100.00%1100.00%
Total94100.00%1100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Rob Clark56197.23%375.00%
Archit Taneja162.77%125.00%
Total577100.00%4100.00%
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