On 08/26/2014 07:53 AM, Joonyoung Shim wrote:
> Hi Andrzej,
>
> On 08/22/2014 04:52 PM, Andrzej Hajda wrote:
>> 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);
> ~ Missing?
Yes, thanks for pointing it out.
Regards
Andrzej
>
>>
>> - /* 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;
>>
>
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