#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <linux/list.h>
#include <linux/io.h>
#include <linux/slab.h>
static void fimc_m2m_job_finish(struct fimc_ctx *ctx, int vb_state)
{
struct vb2_buffer *src_vb, *dst_vb;
- struct fimc_dev *fimc = ctx->fimc_dev;
if (!ctx || !ctx->m2m_ctx)
return;
if (src_vb && dst_vb) {
v4l2_m2m_buf_done(src_vb, vb_state);
v4l2_m2m_buf_done(dst_vb, vb_state);
- v4l2_m2m_job_finish(fimc->m2m.m2m_dev, ctx->m2m_ctx);
+ v4l2_m2m_job_finish(ctx->fimc_dev->m2m.m2m_dev,
+ ctx->m2m_ctx);
}
}
/* Complete the transaction which has been scheduled for execution. */
-static void fimc_m2m_shutdown(struct fimc_ctx *ctx)
+static int fimc_m2m_shutdown(struct fimc_ctx *ctx)
{
struct fimc_dev *fimc = ctx->fimc_dev;
int ret;
if (!fimc_m2m_pending(fimc))
- return;
+ return 0;
fimc_ctx_state_lock_set(FIMC_CTX_SHUT, ctx);
ret = wait_event_timeout(fimc->irq_queue,
!fimc_ctx_state_is_set(FIMC_CTX_SHUT, ctx),
FIMC_SHUTDOWN_TIMEOUT);
- /*
- * In case of a timeout the buffers are not released in the interrupt
- * handler so return them here with the error flag set, if there are
- * any on the queue.
- */
- if (ret == 0)
- fimc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
+
+ return ret == 0 ? -ETIMEDOUT : ret;
+}
+
+static int start_streaming(struct vb2_queue *q, unsigned int count)
+{
+ struct fimc_ctx *ctx = q->drv_priv;
+ int ret;
+
+ ret = pm_runtime_get_sync(&ctx->fimc_dev->pdev->dev);
+ return ret > 0 ? 0 : ret;
}
static int stop_streaming(struct vb2_queue *q)
{
struct fimc_ctx *ctx = q->drv_priv;
+ int ret;
- fimc_m2m_shutdown(ctx);
+ ret = fimc_m2m_shutdown(ctx);
+ if (ret == -ETIMEDOUT)
+ fimc_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR);
+ pm_runtime_put(&ctx->fimc_dev->pdev->dev);
return 0;
}
fimc_hw_get_frame_index(fimc), cap->active_buf_cnt);
}
-static irqreturn_t fimc_isr(int irq, void *priv)
+static irqreturn_t fimc_irq_handler(int irq, void *priv)
{
struct fimc_dev *fimc = priv;
struct fimc_vid_cap *cap = &fimc->vid_cap;
fimc_hw_clear_irq(fimc);
+ spin_lock(&fimc->slock);
+
if (test_and_clear_bit(ST_M2M_PEND, &fimc->state)) {
+ if (test_and_clear_bit(ST_M2M_SUSPENDING, &fimc->state)) {
+ set_bit(ST_M2M_SUSPENDED, &fimc->state);
+ wake_up(&fimc->irq_queue);
+ goto out;
+ }
ctx = v4l2_m2m_get_curr_priv(fimc->m2m.m2m_dev);
if (ctx != NULL) {
+ spin_unlock(&fimc->slock);
fimc_m2m_job_finish(ctx, VB2_BUF_STATE_DONE);
spin_lock(&ctx->slock);
}
spin_unlock(&ctx->slock);
}
-
return IRQ_HANDLED;
- }
-
- spin_lock(&fimc->slock);
-
- if (test_bit(ST_CAPT_PEND, &fimc->state)) {
- fimc_capture_irq_handler(fimc);
+ } else {
+ if (test_bit(ST_CAPT_PEND, &fimc->state)) {
+ fimc_capture_irq_handler(fimc);
- if (cap->active_buf_cnt == 1) {
- fimc_deactivate_capture(fimc);
- clear_bit(ST_CAPT_STREAM, &fimc->state);
+ if (cap->active_buf_cnt == 1) {
+ fimc_deactivate_capture(fimc);
+ clear_bit(ST_CAPT_STREAM, &fimc->state);
+ }
}
}
-
+out:
spin_unlock(&fimc->slock);
return IRQ_HANDLED;
}
return;
fimc = ctx->fimc_dev;
-
- spin_lock_irqsave(&ctx->slock, flags);
+ spin_lock_irqsave(&fimc->slock, flags);
set_bit(ST_M2M_PEND, &fimc->state);
+ spin_lock(&ctx->slock);
ctx->state |= (FIMC_SRC_ADDR | FIMC_DST_ADDR);
ret = fimc_prepare_config(ctx, ctx->state);
if (ret)
ctx->state |= FIMC_PARAMS;
fimc->m2m.ctx = ctx;
}
-
- spin_lock(&fimc->slock);
fimc_hw_set_input_addr(fimc, &ctx->s_frame.paddr);
if (ctx->state & FIMC_PARAMS) {
ctx->state &= (FIMC_CTX_M2M | FIMC_CTX_CAP |
FIMC_SRC_FMT | FIMC_DST_FMT);
fimc_hw_activate_input_dma(fimc, true);
- spin_unlock(&fimc->slock);
-
dma_unlock:
- spin_unlock_irqrestore(&ctx->slock, flags);
+ spin_unlock(&ctx->slock);
+ spin_unlock_irqrestore(&fimc->slock, flags);
}
static void fimc_job_abort(void *priv)
.wait_prepare = fimc_unlock,
.wait_finish = fimc_lock,
.stop_streaming = stop_streaming,
+ .start_streaming = start_streaming,
};
static int fimc_m2m_querycap(struct file *file, void *priv,
u32 max_width, mod_x, mod_y, mask;
int i, is_output = 0;
-
if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
if (fimc_ctx_state_is_set(FIMC_CTX_CAP, ctx))
return -EINVAL;
if (fimc->vid_cap.refcnt > 0)
return -EBUSY;
- fimc->m2m.refcnt++;
- set_bit(ST_OUTDMA_RUN, &fimc->state);
-
ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
if (!ctx)
return -ENOMEM;
return err;
}
+ if (fimc->m2m.refcnt++ == 0)
+ set_bit(ST_M2M_RUN, &fimc->state);
+
return 0;
}
task_pid_nr(current), fimc->state, fimc->m2m.refcnt);
v4l2_m2m_ctx_release(ctx->m2m_ctx);
- kfree(ctx);
- if (--fimc->m2m.refcnt <= 0)
- clear_bit(ST_OUTDMA_RUN, &fimc->state);
+ if (--fimc->m2m.refcnt <= 0)
+ clear_bit(ST_M2M_RUN, &fimc->state);
+ kfree(ctx);
return 0;
}
}
}
-static void fimc_clk_release(struct fimc_dev *fimc)
+static void fimc_clk_put(struct fimc_dev *fimc)
{
int i;
for (i = 0; i < fimc->num_clocks; i++) {
- if (fimc->clock[i]) {
- clk_disable(fimc->clock[i]);
+ if (fimc->clock[i])
clk_put(fimc->clock[i]);
- }
}
}
int i;
for (i = 0; i < fimc->num_clocks; i++) {
fimc->clock[i] = clk_get(&fimc->pdev->dev, fimc_clocks[i]);
-
- if (!IS_ERR_OR_NULL(fimc->clock[i])) {
- clk_enable(fimc->clock[i]);
+ if (!IS_ERR_OR_NULL(fimc->clock[i]))
continue;
- }
dev_err(&fimc->pdev->dev, "failed to get fimc clock: %s\n",
fimc_clocks[i]);
return -ENXIO;
}
+
+ return 0;
+}
+
+static int fimc_m2m_suspend(struct fimc_dev *fimc)
+{
+ unsigned long flags;
+ int timeout;
+
+ spin_lock_irqsave(&fimc->slock, flags);
+ if (!fimc_m2m_pending(fimc)) {
+ spin_unlock_irqrestore(&fimc->slock, flags);
+ return 0;
+ }
+ clear_bit(ST_M2M_SUSPENDED, &fimc->state);
+ set_bit(ST_M2M_SUSPENDING, &fimc->state);
+ spin_unlock_irqrestore(&fimc->slock, flags);
+
+ timeout = wait_event_timeout(fimc->irq_queue,
+ test_bit(ST_M2M_SUSPENDED, &fimc->state),
+ FIMC_SHUTDOWN_TIMEOUT);
+
+ clear_bit(ST_M2M_SUSPENDING, &fimc->state);
+ return timeout == 0 ? -EAGAIN : 0;
+}
+
+static int fimc_m2m_resume(struct fimc_dev *fimc)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&fimc->slock, flags);
+ /* Clear for full H/W setup in first run after resume */
+ fimc->m2m.ctx = NULL;
+ spin_unlock_irqrestore(&fimc->slock, flags);
+
+ if (test_and_clear_bit(ST_M2M_SUSPENDED, &fimc->state))
+ fimc_m2m_job_finish(fimc->m2m.ctx,
+ VB2_BUF_STATE_ERROR);
return 0;
}
return -ENOMEM;
fimc->id = pdev->id;
+
fimc->variant = drv_data->variant[fimc->id];
fimc->pdev = pdev;
pdata = pdev->dev.platform_data;
fimc->pdata = pdata;
- fimc->state = ST_IDLE;
+
+ set_bit(ST_LPM, &fimc->state);
init_waitqueue_head(&fimc->irq_queue);
spin_lock_init(&fimc->slock);
fimc->num_clocks++;
}
- ret = fimc_clk_get(fimc);
- if (ret)
- goto err_regs_unmap;
- clk_set_rate(fimc->clock[CLK_BUS], drv_data->lclk_frequency);
-
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res) {
dev_err(&pdev->dev, "failed to get IRQ resource\n");
ret = -ENXIO;
- goto err_clk;
+ goto err_regs_unmap;
}
fimc->irq = res->start;
- fimc_hw_reset(fimc);
+ ret = fimc_clk_get(fimc);
+ if (ret)
+ goto err_regs_unmap;
+ clk_set_rate(fimc->clock[CLK_BUS], drv_data->lclk_frequency);
+ clk_enable(fimc->clock[CLK_BUS]);
+
+ platform_set_drvdata(pdev, fimc);
- ret = request_irq(fimc->irq, fimc_isr, 0, pdev->name, fimc);
+ ret = request_irq(fimc->irq, fimc_irq_handler, 0, pdev->name, fimc);
if (ret) {
dev_err(&pdev->dev, "failed to install irq (%d)\n", ret);
goto err_clk;
}
+ pm_runtime_enable(&pdev->dev);
+ ret = pm_runtime_get_sync(&pdev->dev);
+ if (ret < 0)
+ goto err_irq;
/* Initialize contiguous memory allocator */
- fimc->alloc_ctx = vb2_dma_contig_init_ctx(&fimc->pdev->dev);
+ fimc->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
if (IS_ERR(fimc->alloc_ctx)) {
ret = PTR_ERR(fimc->alloc_ctx);
- goto err_irq;
+ goto err_pm;
}
ret = fimc_register_m2m_device(fimc);
if (ret)
- goto err_irq;
+ goto err_alloc;
/* At least one camera sensor is required to register capture node */
if (cap_input_index >= 0) {
ret = fimc_register_capture_device(fimc);
if (ret)
goto err_m2m;
- clk_disable(fimc->clock[CLK_CAM]);
}
- /*
- * Exclude the additional output DMA address registers by masking
- * them out on HW revisions that provide extended capabilites.
- */
- if (fimc->variant->out_buf_count > 4)
- fimc_hw_set_dma_seq(fimc, 0xF);
dev_dbg(&pdev->dev, "%s(): fimc-%d registered successfully\n",
__func__, fimc->id);
+ pm_runtime_put(&pdev->dev);
return 0;
err_m2m:
fimc_unregister_m2m_device(fimc);
+err_alloc:
+ vb2_dma_contig_cleanup_ctx(fimc->alloc_ctx);
+err_pm:
+ pm_runtime_put(&pdev->dev);
err_irq:
free_irq(fimc->irq, fimc);
err_clk:
- fimc_clk_release(fimc);
+ fimc_clk_put(fimc);
err_regs_unmap:
iounmap(fimc->regs);
err_req_region:
return ret;
}
-static int __devexit fimc_remove(struct platform_device *pdev)
+static int fimc_runtime_resume(struct device *dev)
{
- struct fimc_dev *fimc =
- (struct fimc_dev *)platform_get_drvdata(pdev);
+ struct fimc_dev *fimc = dev_get_drvdata(dev);
- free_irq(fimc->irq, fimc);
+ dbg("fimc%d: state: 0x%lx", fimc->id, fimc->state);
+
+ /* Enable clocks and perform basic initalization */
+ clk_enable(fimc->clock[CLK_GATE]);
fimc_hw_reset(fimc);
+ if (fimc->variant->out_buf_count > 4)
+ fimc_hw_set_dma_seq(fimc, 0xF);
+
+ /* Resume the capture or mem-to-mem device */
+ if (fimc_capture_busy(fimc))
+ return fimc_capture_resume(fimc);
+ else if (fimc_m2m_pending(fimc))
+ return fimc_m2m_resume(fimc);
+ return 0;
+}
+
+static int fimc_runtime_suspend(struct device *dev)
+{
+ struct fimc_dev *fimc = dev_get_drvdata(dev);
+ int ret = 0;
+
+ if (fimc_capture_busy(fimc))
+ ret = fimc_capture_suspend(fimc);
+ else
+ ret = fimc_m2m_suspend(fimc);
+ if (!ret)
+ clk_disable(fimc->clock[CLK_GATE]);
+
+ dbg("fimc%d: state: 0x%lx", fimc->id, fimc->state);
+ return ret;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int fimc_resume(struct device *dev)
+{
+ struct fimc_dev *fimc = dev_get_drvdata(dev);
+ unsigned long flags;
+
+ dbg("fimc%d: state: 0x%lx", fimc->id, fimc->state);
+
+ /* Do not resume if the device was idle before system suspend */
+ spin_lock_irqsave(&fimc->slock, flags);
+ if (!test_and_clear_bit(ST_LPM, &fimc->state) ||
+ (!fimc_m2m_active(fimc) && !fimc_capture_busy(fimc))) {
+ spin_unlock_irqrestore(&fimc->slock, flags);
+ return 0;
+ }
+ fimc_hw_reset(fimc);
+ if (fimc->variant->out_buf_count > 4)
+ fimc_hw_set_dma_seq(fimc, 0xF);
+ spin_unlock_irqrestore(&fimc->slock, flags);
+
+ if (fimc_capture_busy(fimc))
+ return fimc_capture_resume(fimc);
+
+ return fimc_m2m_resume(fimc);
+}
+
+static int fimc_suspend(struct device *dev)
+{
+ struct fimc_dev *fimc = dev_get_drvdata(dev);
+
+ dbg("fimc%d: state: 0x%lx", fimc->id, fimc->state);
+
+ if (test_and_set_bit(ST_LPM, &fimc->state))
+ return 0;
+ if (fimc_capture_busy(fimc))
+ return fimc_capture_suspend(fimc);
+
+ return fimc_m2m_suspend(fimc);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static int __devexit fimc_remove(struct platform_device *pdev)
+{
+ struct fimc_dev *fimc = platform_get_drvdata(pdev);
+
+ pm_runtime_disable(&pdev->dev);
+ fimc_runtime_suspend(&pdev->dev);
+ pm_runtime_set_suspended(&pdev->dev);
fimc_unregister_m2m_device(fimc);
fimc_unregister_capture_device(fimc);
- fimc_clk_release(fimc);
-
vb2_dma_contig_cleanup_ctx(fimc->alloc_ctx);
+ clk_disable(fimc->clock[CLK_BUS]);
+ fimc_clk_put(fimc);
+ free_irq(fimc->irq, fimc);
iounmap(fimc->regs);
release_resource(fimc->regs_res);
kfree(fimc->regs_res);
kfree(fimc);
- dev_info(&pdev->dev, "%s driver unloaded\n", pdev->name);
+ dev_info(&pdev->dev, "driver unloaded\n");
return 0;
}
};
MODULE_DEVICE_TABLE(platform, fimc_driver_ids);
+static const struct dev_pm_ops fimc_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(fimc_suspend, fimc_resume)
+ SET_RUNTIME_PM_OPS(fimc_runtime_suspend, fimc_runtime_resume, NULL)
+};
+
static struct platform_driver fimc_driver = {
.probe = fimc_probe,
.remove = __devexit_p(fimc_remove),
.driver = {
.name = MODULE_NAME,
.owner = THIS_MODULE,
+ .pm = &fimc_pm_ops,
}
};
projects / platform / kernel / linux-rpi.git / commitdiff