![Stepan Moskovchenko](/assets/img/avatar_default.png)
Qualcomm development of the MSM SOC framebuffer driver has diverged significantly from the driver used by Android. This is a snapshot of our current driver, in all it's agony. We are putting this in staging to help with the process of converging the two drivers. At this point, the driver has been tested only in dumb framebuffer mode. Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org> Signed-off-by: David Brown <davidb@codeaurora.org> Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org> [dwalker@codeaurora.org: added a small compile fix and TODO.] Signed-off-by: Daniel Walker <dwalker@codeaurora.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
348 lines
9.6 KiB
C
348 lines
9.6 KiB
C
/* Copyright (c) 2009-2010, Code Aurora Forum. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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#include "mdp.h"
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static boolean mdp_ppp_intr_flag = FALSE;
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static boolean mdp_ppp_busy_flag = FALSE;
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/* Queue to keep track of the completed jobs for cleaning */
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static LIST_HEAD(mdp_ppp_djob_clnrq);
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static DEFINE_SPINLOCK(mdp_ppp_djob_clnrq_lock);
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/* Worker to cleanup Display Jobs */
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static struct workqueue_struct *mdp_ppp_djob_clnr;
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/* Display Queue (DQ) for MDP PPP Block */
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static LIST_HEAD(mdp_ppp_dq);
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static DEFINE_SPINLOCK(mdp_ppp_dq_lock);
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/* Current Display Job for MDP PPP */
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static struct mdp_ppp_djob *curr_djob;
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/* Track ret code for the last opeartion */
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static int mdp_ppp_ret_code;
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inline int mdp_ppp_get_ret_code(void)
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{
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return mdp_ppp_ret_code;
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}
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/* Push <Reg, Val> pair into DQ (if available) to later
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* program the MDP PPP Block */
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inline void mdp_ppp_outdw(uint32_t addr, uint32_t data)
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{
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if (curr_djob) {
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/* get the last node of the list. */
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struct mdp_ppp_roi_cmd_set *node =
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list_entry(curr_djob->roi_cmd_list.prev,
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struct mdp_ppp_roi_cmd_set, node);
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/* If a node is already full, create a new one and add it to
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* the list (roi_cmd_list).
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*/
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if (node->ncmds == MDP_PPP_ROI_NODE_SIZE) {
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node = kmalloc(sizeof(struct mdp_ppp_roi_cmd_set),
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GFP_KERNEL);
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if (!node) {
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printk(KERN_ERR
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"MDP_PPP: not enough memory.\n");
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mdp_ppp_ret_code = -EINVAL;
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return;
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}
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/* no ROI commands initially */
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node->ncmds = 0;
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/* add one node to roi_cmd_list. */
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list_add_tail(&node->node, &curr_djob->roi_cmd_list);
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}
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/* register ROI commands */
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node->cmd[node->ncmds].reg = addr;
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node->cmd[node->ncmds].val = data;
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node->ncmds++;
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} else
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/* program MDP PPP block now */
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outpdw((addr), (data));
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}
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/* Initialize DQ */
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inline void mdp_ppp_dq_init(void)
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{
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mdp_ppp_djob_clnr = create_singlethread_workqueue("MDPDJobClnrThrd");
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}
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/* Release resources of a job (DJob). */
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static void mdp_ppp_del_djob(struct mdp_ppp_djob *job)
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{
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struct mdp_ppp_roi_cmd_set *node, *tmp;
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/* release mem */
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mdp_ppp_put_img(job->p_src_file, job->p_dst_file);
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/* release roi_cmd_list */
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list_for_each_entry_safe(node, tmp, &job->roi_cmd_list, node) {
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list_del(&node->node);
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kfree(node);
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}
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/* release job struct */
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kfree(job);
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}
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/* Worker thread to reclaim resources once a display job is done */
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static void mdp_ppp_djob_cleaner(struct work_struct *work)
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{
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struct mdp_ppp_djob *job;
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MDP_PPP_DEBUG_MSG("mdp ppp display job cleaner started \n");
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/* cleanup display job */
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job = container_of(work, struct mdp_ppp_djob, cleaner.work);
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if (likely(work && job))
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mdp_ppp_del_djob(job);
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}
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/* Create a new Display Job (DJob) */
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inline struct mdp_ppp_djob *mdp_ppp_new_djob(void)
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{
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struct mdp_ppp_djob *job;
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struct mdp_ppp_roi_cmd_set *node;
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/* create a new djob */
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job = kmalloc(sizeof(struct mdp_ppp_djob), GFP_KERNEL);
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if (!job)
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return NULL;
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/* add the first node to curr_djob->roi_cmd_list */
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node = kmalloc(sizeof(struct mdp_ppp_roi_cmd_set), GFP_KERNEL);
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if (!node) {
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kfree(job);
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return NULL;
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}
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/* make this current djob container to keep track of the curr djob not
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* used in the async path i.e. no sync needed
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*
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* Should not contain any references from the past djob
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*/
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BUG_ON(curr_djob);
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curr_djob = job;
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INIT_LIST_HEAD(&curr_djob->roi_cmd_list);
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/* no ROI commands initially */
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node->ncmds = 0;
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INIT_LIST_HEAD(&node->node);
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list_add_tail(&node->node, &curr_djob->roi_cmd_list);
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/* register this djob with the djob cleaner
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* initializes 'work' data struct
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*/
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INIT_DELAYED_WORK(&curr_djob->cleaner, mdp_ppp_djob_cleaner);
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INIT_LIST_HEAD(&curr_djob->entry);
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curr_djob->p_src_file = 0;
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curr_djob->p_dst_file = 0;
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return job;
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}
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/* Undo the effect of mdp_ppp_new_djob() */
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inline void mdp_ppp_clear_curr_djob(void)
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{
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if (likely(curr_djob)) {
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mdp_ppp_del_djob(curr_djob);
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curr_djob = NULL;
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}
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}
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/* Cleanup dirty djobs */
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static void mdp_ppp_flush_dirty_djobs(void *cond)
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{
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unsigned long flags;
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struct mdp_ppp_djob *job;
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/* Flush the jobs from the djob clnr queue */
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while (cond && test_bit(0, (unsigned long *)cond)) {
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/* Until we are done with the cleanup queue */
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spin_lock_irqsave(&mdp_ppp_djob_clnrq_lock, flags);
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if (list_empty(&mdp_ppp_djob_clnrq)) {
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spin_unlock_irqrestore(&mdp_ppp_djob_clnrq_lock, flags);
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break;
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}
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MDP_PPP_DEBUG_MSG("flushing djobs ... loop \n");
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/* Retrieve the job that needs to be cleaned */
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job = list_entry(mdp_ppp_djob_clnrq.next,
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struct mdp_ppp_djob, entry);
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list_del_init(&job->entry);
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spin_unlock_irqrestore(&mdp_ppp_djob_clnrq_lock, flags);
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/* Keep mem state coherent */
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msm_fb_ensure_mem_coherency_after_dma(job->info, &job->req, 1);
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/* Schedule jobs for cleanup
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* A seperate worker thread does this */
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queue_delayed_work(mdp_ppp_djob_clnr, &job->cleaner,
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mdp_timer_duration);
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}
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}
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/* If MDP PPP engine is busy, wait until it is available again */
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void mdp_ppp_wait(void)
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{
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unsigned long flags;
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int cond = 1;
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/* keep flushing dirty djobs as long as MDP PPP engine is busy */
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mdp_ppp_flush_dirty_djobs(&mdp_ppp_busy_flag);
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/* block if MDP PPP engine is still busy */
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spin_lock_irqsave(&mdp_ppp_dq_lock, flags);
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if (test_bit(0, (unsigned long *)&mdp_ppp_busy_flag)) {
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/* prepare for the wakeup event */
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test_and_set_bit(0, (unsigned long *)&mdp_ppp_waiting);
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INIT_COMPLETION(mdp_ppp_comp);
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spin_unlock_irqrestore(&mdp_ppp_dq_lock, flags);
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/* block uninterruptibly until available */
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MDP_PPP_DEBUG_MSG("waiting for mdp... \n");
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wait_for_completion_killable(&mdp_ppp_comp);
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/* if MDP PPP engine is still free,
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* disable INT_MDP if enabled
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*/
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spin_lock_irqsave(&mdp_ppp_dq_lock, flags);
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if (!test_bit(0, (unsigned long *)&mdp_ppp_busy_flag) &&
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test_and_clear_bit(0, (unsigned long *)&mdp_ppp_intr_flag))
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mdp_disable_irq(MDP_PPP_TERM);
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}
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spin_unlock_irqrestore(&mdp_ppp_dq_lock, flags);
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/* flush remaining dirty djobs, if any */
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mdp_ppp_flush_dirty_djobs(&cond);
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}
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/* Program MDP PPP block to process this ROI */
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static void mdp_ppp_process_roi(struct list_head *roi_cmd_list)
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{
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/* program PPP engine with registered ROI commands */
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struct mdp_ppp_roi_cmd_set *node;
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list_for_each_entry(node, roi_cmd_list, node) {
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int i = 0;
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for (; i < node->ncmds; i++) {
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MDP_PPP_DEBUG_MSG("%d: reg: 0x%x val: 0x%x \n",
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i, node->cmd[i].reg, node->cmd[i].val);
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outpdw(node->cmd[i].reg, node->cmd[i].val);
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}
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}
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/* kickoff MDP PPP engine */
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MDP_PPP_DEBUG_MSG("kicking off mdp \n");
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outpdw(MDP_BASE + 0x30, 0x1000);
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}
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/* Submit this display job to MDP PPP engine */
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static void mdp_ppp_dispatch_djob(struct mdp_ppp_djob *job)
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{
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/* enable INT_MDP if disabled */
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if (!test_and_set_bit(0, (unsigned long *)&mdp_ppp_intr_flag))
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mdp_enable_irq(MDP_PPP_TERM);
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/* turn on PPP and CMD blocks */
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mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
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mdp_pipe_ctrl(MDP_PPP_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
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/* process this ROI */
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mdp_ppp_process_roi(&job->roi_cmd_list);
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}
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/* Enqueue this display job to be cleaned up later in "mdp_ppp_djob_done" */
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static inline void mdp_ppp_enqueue_djob(struct mdp_ppp_djob *job)
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{
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unsigned long flags;
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spin_lock_irqsave(&mdp_ppp_dq_lock, flags);
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list_add_tail(&job->entry, &mdp_ppp_dq);
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spin_unlock_irqrestore(&mdp_ppp_dq_lock, flags);
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}
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/* First enqueue display job for cleanup and dispatch immediately
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* if MDP PPP engine is free */
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void mdp_ppp_process_curr_djob(void)
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{
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/* enqueue djob */
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mdp_ppp_enqueue_djob(curr_djob);
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/* dispatch now if MDP PPP engine is free */
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if (!test_and_set_bit(0, (unsigned long *)&mdp_ppp_busy_flag))
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mdp_ppp_dispatch_djob(curr_djob);
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/* done with the current djob */
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curr_djob = NULL;
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}
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/* Called from mdp_isr - cleanup finished job and start with next
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* if available else set MDP PPP engine free */
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void mdp_ppp_djob_done(void)
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{
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struct mdp_ppp_djob *curr, *next;
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unsigned long flags;
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/* dequeue current */
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spin_lock_irqsave(&mdp_ppp_dq_lock, flags);
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curr = list_entry(mdp_ppp_dq.next, struct mdp_ppp_djob, entry);
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list_del_init(&curr->entry);
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spin_unlock_irqrestore(&mdp_ppp_dq_lock, flags);
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/* cleanup current - enqueue in the djob clnr queue */
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spin_lock_irqsave(&mdp_ppp_djob_clnrq_lock, flags);
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list_add_tail(&curr->entry, &mdp_ppp_djob_clnrq);
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spin_unlock_irqrestore(&mdp_ppp_djob_clnrq_lock, flags);
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/* grab next pending */
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spin_lock_irqsave(&mdp_ppp_dq_lock, flags);
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if (!list_empty(&mdp_ppp_dq)) {
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next = list_entry(mdp_ppp_dq.next, struct mdp_ppp_djob,
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entry);
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spin_unlock_irqrestore(&mdp_ppp_dq_lock, flags);
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/* process next in the queue */
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mdp_ppp_process_roi(&next->roi_cmd_list);
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} else {
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/* no pending display job */
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spin_unlock_irqrestore(&mdp_ppp_dq_lock, flags);
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/* turn off PPP and CMD blocks - "in_isr" is TRUE */
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mdp_pipe_ctrl(MDP_PPP_BLOCK, MDP_BLOCK_POWER_OFF, TRUE);
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mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_OFF, TRUE);
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/* notify if waiting */
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if (test_and_clear_bit(0, (unsigned long *)&mdp_ppp_waiting))
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complete(&mdp_ppp_comp);
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/* set free */
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test_and_clear_bit(0, (unsigned long *)&mdp_ppp_busy_flag);
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}
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}
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