[media] s5p-mfc: Move firmware allocation to DMA configure function

To complete DMA memory configuration for MFC device, allocation of the
firmware buffer is needed, because some parameters are dependant on its base
address. Till now, this has been handled in the s5p_mfc_alloc_firmware()
function. This patch moves that logic to s5p_mfc_configure_dma_memory() to
keep DMA memory related operations in a single place. This way
s5p_mfc_alloc_firmware() is simplified and does what it name says. The
other consequence of this change is moving s5p_mfc_alloc_firmware() call
from the s5p_mfc_probe() function to the s5p_mfc_configure_dma_memory().

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Andrzej Hajda <a.hajda@samsung.com>
Tested-by: Smitha T Murthy <smitha.t@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

1 files changed, 49 insertions, 13 deletions

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c
index 1fe790d88e70..16f4ba4f25ee 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
@@ -1105,6 +1105,11 @@ static struct device *s5p_mfc_alloc_memdev(struct device *dev,
 static int s5p_mfc_configure_dma_memory(struct s5p_mfc_dev *mfc_dev)
 {
 	struct device *dev = &mfc_dev->plat_dev->dev;
+	void *bank2_virt;
+	dma_addr_t bank2_dma_addr;
+	unsigned long align_size = 1 << MFC_BASE_ALIGN_ORDER;
+	struct s5p_mfc_priv_buf *fw_buf = &mfc_dev->fw_buf;
+	int ret;
 
 	/*
 	 * When IOMMU is available, we cannot use the default configuration,
@@ -1117,14 +1122,21 @@ static int s5p_mfc_configure_dma_memory(struct s5p_mfc_dev *mfc_dev)
 	if (exynos_is_iommu_available(dev)) {
 		int ret = exynos_configure_iommu(dev, S5P_MFC_IOMMU_DMA_BASE,
 						 S5P_MFC_IOMMU_DMA_SIZE);
-		if (ret == 0) {
-			mfc_dev->mem_dev[BANK1_CTX] =
-				mfc_dev->mem_dev[BANK2_CTX] = dev;
-			vb2_dma_contig_set_max_seg_size(dev,
-							DMA_BIT_MASK(32));
+		if (ret)
+			return ret;
+
+		mfc_dev->mem_dev[BANK1_CTX] = mfc_dev->mem_dev[BANK2_CTX] = dev;
+		ret = s5p_mfc_alloc_firmware(mfc_dev);
+		if (ret) {
+			exynos_unconfigure_iommu(dev);
+			return ret;
 		}
 
-		return ret;
+		mfc_dev->dma_base[BANK1_CTX] = fw_buf->dma;
+		mfc_dev->dma_base[BANK2_CTX] = fw_buf->dma;
+		vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32));
+
+		return 0;
 	}
 
 	/*
@@ -1142,6 +1154,35 @@ static int s5p_mfc_configure_dma_memory(struct s5p_mfc_dev *mfc_dev)
 		return -ENODEV;
 	}
 
+	/* Allocate memory for firmware and initialize both banks addresses */
+	ret = s5p_mfc_alloc_firmware(mfc_dev);
+	if (ret) {
+		device_unregister(mfc_dev->mem_dev[BANK2_CTX]);
+		device_unregister(mfc_dev->mem_dev[BANK1_CTX]);
+		return ret;
+	}
+
+	mfc_dev->dma_base[BANK1_CTX] = fw_buf->dma;
+
+	bank2_virt = dma_alloc_coherent(mfc_dev->mem_dev[BANK2_CTX], align_size,
+					&bank2_dma_addr, GFP_KERNEL);
+	if (!bank2_virt) {
+		mfc_err("Allocating bank2 base failed\n");
+		s5p_mfc_release_firmware(mfc_dev);
+		device_unregister(mfc_dev->mem_dev[BANK2_CTX]);
+		device_unregister(mfc_dev->mem_dev[BANK1_CTX]);
+		return -ENOMEM;
+	}
+
+	/* Valid buffers passed to MFC encoder with LAST_FRAME command
+	 * should not have address of bank2 - MFC will treat it as a null frame.
+	 * To avoid such situation we set bank2 address below the pool address.
+	 */
+	mfc_dev->dma_base[BANK2_CTX] = bank2_dma_addr - align_size;
+
+	dma_free_coherent(mfc_dev->mem_dev[BANK2_CTX], align_size, bank2_virt,
+			  bank2_dma_addr);
+
 	vb2_dma_contig_set_max_seg_size(mfc_dev->mem_dev[BANK1_CTX],
 					DMA_BIT_MASK(32));
 	vb2_dma_contig_set_max_seg_size(mfc_dev->mem_dev[BANK2_CTX],
@@ -1154,6 +1195,8 @@ static void s5p_mfc_unconfigure_dma_memory(struct s5p_mfc_dev *mfc_dev)
 {
 	struct device *dev = &mfc_dev->plat_dev->dev;
 
+	s5p_mfc_release_firmware(mfc_dev);
+
 	if (exynos_is_iommu_available(dev)) {
 		exynos_unconfigure_iommu(dev);
 		vb2_dma_contig_clear_max_seg_size(dev);
@@ -1230,10 +1273,6 @@ static int s5p_mfc_probe(struct platform_device *pdev)
 	dev->watchdog_timer.data = (unsigned long)dev;
 	dev->watchdog_timer.function = s5p_mfc_watchdog;
 
-	ret = s5p_mfc_alloc_firmware(dev);
-	if (ret)
-		goto err_res;
-
 	ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
 	if (ret)
 		goto err_v4l2_dev_reg;
@@ -1308,8 +1347,6 @@ err_enc_alloc:
 err_dec_alloc:
 	v4l2_device_unregister(&dev->v4l2_dev);
 err_v4l2_dev_reg:
-	s5p_mfc_release_firmware(dev);
-err_res:
 	s5p_mfc_final_pm(dev);
 err_dma:
 	s5p_mfc_unconfigure_dma_memory(dev);
@@ -1351,7 +1388,6 @@ static int s5p_mfc_remove(struct platform_device *pdev)
 	video_device_release(dev->vfd_enc);
 	video_device_release(dev->vfd_dec);
 	v4l2_device_unregister(&dev->v4l2_dev);
-	s5p_mfc_release_firmware(dev);
 	s5p_mfc_unconfigure_dma_memory(dev);
 
 	s5p_mfc_final_pm(dev);