The patch removes redundant checks, redundant HW reads
and simplifies code.
Signed-off-by: Andrzej Hajda <a.ha...@samsung.com>
---
drivers/gpu/drm/exynos/exynos_drm_fimc.c | 64 ++++++++------------------------
1 file changed, 15 insertions(+), 49 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimc.c
b/drivers/gpu/drm/exynos/exynos_drm_fimc.c
index bd6628d..b20078e 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimc.c
@@ -1124,67 +1124,34 @@ static int fimc_dst_set_size(struct device *dev, int
swap,
return 0;
}
-static int fimc_dst_get_buf_count(struct fimc_context *ctx)
-{
- u32 cfg, buf_num;
-
- cfg = fimc_read(ctx, EXYNOS_CIFCNTSEQ);
-
- buf_num = hweight32(cfg);
-
- DRM_DEBUG_KMS("buf_num[%d]\n", buf_num);
-
- return buf_num;
-}
-
-static int fimc_dst_set_buf_seq(struct fimc_context *ctx, u32 buf_id,
+static void fimc_dst_set_buf_seq(struct fimc_context *ctx, u32 buf_id,
enum drm_exynos_ipp_buf_type buf_type)
{
- struct exynos_drm_ippdrv *ippdrv = &ctx->ippdrv;
- bool enable;
- u32 cfg;
- u32 mask = 0x00000001 << buf_id;
- int ret = 0;
unsigned long flags;
+ u32 buf_num;
+ u32 cfg;
DRM_DEBUG_KMS("buf_id[%d]buf_type[%d]\n", buf_id, buf_type);
spin_lock_irqsave(&ctx->lock, flags);
- /* mask register set */
cfg = fimc_read(ctx, EXYNOS_CIFCNTSEQ);
- switch (buf_type) {
- case IPP_BUF_ENQUEUE:
- enable = true;
- break;
- case IPP_BUF_DEQUEUE:
- enable = false;
- break;
- default:
- dev_err(ippdrv->dev, "invalid buf ctrl parameter.\n");
- ret = -EINVAL;
- goto err_unlock;
- }
+ if (buf_type == IPP_BUF_ENQUEUE)
+ cfg |= (1 << buf_id);
+ else
+ cfg &= (1 << buf_id);
- /* sequence id */
- cfg &= ~mask;
- cfg |= (enable << buf_id);
fimc_write(ctx, cfg, EXYNOS_CIFCNTSEQ);
- /* interrupt enable */
- if (buf_type == IPP_BUF_ENQUEUE &&
- fimc_dst_get_buf_count(ctx) >= FIMC_BUF_START)
- fimc_mask_irq(ctx, true);
+ buf_num = hweight32(cfg);
- /* interrupt disable */
- if (buf_type == IPP_BUF_DEQUEUE &&
- fimc_dst_get_buf_count(ctx) <= FIMC_BUF_STOP)
+ if (buf_type == IPP_BUF_ENQUEUE && buf_num >= FIMC_BUF_START)
+ fimc_mask_irq(ctx, true);
+ else if (buf_type == IPP_BUF_DEQUEUE && buf_num <= FIMC_BUF_STOP)
fimc_mask_irq(ctx, false);
-err_unlock:
spin_unlock_irqrestore(&ctx->lock, flags);
- return ret;
}
static int fimc_dst_set_addr(struct device *dev,
@@ -1242,7 +1209,9 @@ static int fimc_dst_set_addr(struct device *dev,
break;
}
- return fimc_dst_set_buf_seq(ctx, buf_id, buf_type);
+ fimc_dst_set_buf_seq(ctx, buf_id, buf_type);
+
+ return 0;
}
static struct exynos_drm_ipp_ops fimc_dst_ops = {
@@ -1297,10 +1266,7 @@ static irqreturn_t fimc_irq_handler(int irq, void
*dev_id)
DRM_DEBUG_KMS("buf_id[%d]\n", buf_id);
- if (fimc_dst_set_buf_seq(ctx, buf_id, IPP_BUF_DEQUEUE) < 0) {
- DRM_ERROR("failed to dequeue.\n");
- return IRQ_HANDLED;
- }
+ fimc_dst_set_buf_seq(ctx, buf_id, IPP_BUF_DEQUEUE);
event_work->ippdrv = ippdrv;
event_work->buf_id[EXYNOS_DRM_OPS_DST] = buf_id;
--
1.9.1
--
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