linux (samsung): remove no-op obsolete DMA_ATTR_NON_CONSISTENT patches

These patches were made obsolete and no longer apply in the 5.9 and 5.10
kernels with the removal of DMA_ATTR_NON_CONSISTENT flag.

Refs:
- https://lore.kernel.org/lkml/20200915155122.1768241-1-hch@lst.de/
- https://lore.kernel.org/lkml/20200925042122.GA9577@lst.de/

projects/Samsung/patches/linux/samsung-0007-MEMEKA-videobuf2-dc-Support-cacheable-MMAP.patch

@@ -1,69 +0,0 @@
-From a25f859386e35782c139861c6d1fe7821274d2d0 Mon Sep 17 00:00:00 2001
-From: Heng-Ruey Hsu <henryhsu@chromium.org>
-Date: Wed, 26 Oct 2016 10:52:06 +0200
-Subject: [PATCH 07/25] MEMEKA: videobuf2-dc: Support cacheable MMAP
-
-DMA allocations for MMAP type are uncached by default. But for
-some cases, CPU has to access the buffers. ie: memcpy for format
-converter. Supporting cacheable MMAP improves huge performance.
-
-This patch enables cacheable memory for DMA coherent allocator in mmap
-buffer allocation if non-consistent DMA attribute is set and kernel
-mapping is present. Even if userspace doesn't mmap the buffer, sync
-still should be happening if kernel mapping is present.
-If not done in allocation, it is enabled when memory is mapped from
-userspace (if non-consistent DMA attribute is set).
-
-Signed-off-by: Heng-Ruey Hsu <henryhsu@chromium.org>
-Tested-by: Heng-ruey Hsu <henryhsu@chromium.org>
-Reviewed-by: Tomasz Figa <tfiga@chromium.org>
-Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
-Signed-off-by: memeka <mihailescu2m@gmail.com>
----
- .../common/videobuf2/videobuf2-dma-contig.c      | 16 ++++++++++++++++
- 1 file changed, 16 insertions(+)
-
-diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
-index 8accf13fe439..cf65bded46a9 100644
---- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c
-+++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c
-@@ -152,6 +152,10 @@ static void vb2_dc_put(void *buf_priv)
- 		sg_free_table(buf->sgt_base);
- 		kfree(buf->sgt_base);
- 	}
-+	if (buf->dma_sgt) {
-+		sg_free_table(buf->dma_sgt);
-+		kfree(buf->dma_sgt);
-+	}
- 	dma_free_attrs(buf->dev, buf->size, buf->cookie, buf->dma_addr,
- 		       buf->attrs);
- 	put_device(buf->dev);
-@@ -193,6 +197,14 @@ static void *vb2_dc_alloc(struct device *dev, unsigned long attrs,
- 	buf->handler.put = vb2_dc_put;
- 	buf->handler.arg = buf;
- 
-+	/*
-+	 * Enable cache maintenance. Even if userspace doesn't mmap the buffer,
-+	 * sync still should be happening if kernel mapping is present.
-+	 */
-+	if (!(buf->attrs & DMA_ATTR_NO_KERNEL_MAPPING) &&
-+	    buf->attrs & DMA_ATTR_NON_CONSISTENT)
-+		buf->dma_sgt = vb2_dc_get_base_sgt(buf);
-+
- 	refcount_set(&buf->refcount, 1);
- 
- 	return buf;
-@@ -222,6 +234,10 @@ static int vb2_dc_mmap(void *buf_priv, struct vm_area_struct *vma)
- 
- 	vma->vm_ops->open(vma);
- 
-+	/* Enable cache maintenance if not enabled in allocation. */
-+	if (!buf->dma_sgt && buf->attrs & DMA_ATTR_NON_CONSISTENT)
-+		buf->dma_sgt = vb2_dc_get_base_sgt(buf);
-+
- 	pr_debug("%s: mapped dma addr 0x%08lx at 0x%08lx, size %ld\n",
- 		__func__, (unsigned long)buf->dma_addr, vma->vm_start,
- 		buf->size);
--- 
-2.17.1
-

projects/Samsung/patches/linux/samsung-0008-MEMEKA-ARM-dma-mapping-add-support-for-non-consisten.patch

@@ -1,29 +0,0 @@
-From 96a150ab1edd5dcfd06f3d564b0cbdde4b49c6cc Mon Sep 17 00:00:00 2001
-From: Marek Szyprowski <m.szyprowski@samsung.com>
-Date: Wed, 15 Feb 2017 14:08:49 +0100
-Subject: [PATCH 08/25] MEMEKA: ARM: dma-mapping: add support for
- non-consistent dma_mmap
-
-Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
-Signed-off-by: memeka <mihailescu2m@gmail.com>
----
- arch/arm/mm/dma-mapping.c | 3 ++-
- 1 file changed, 2 insertions(+), 1 deletion(-)
-
-diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
-index 80d4e66039ff..afaf2e91b0bc 100644
---- a/arch/arm/mm/dma-mapping.c
-+++ b/arch/arm/mm/dma-mapping.c
-@@ -567,7 +567,8 @@ static inline pgprot_t __get_dma_pgprot(unsigned long attrs, pgprot_t prot)
- {
- 	prot = (attrs & DMA_ATTR_WRITE_COMBINE) ?
- 			pgprot_writecombine(prot) :
--			pgprot_dmacoherent(prot);
-+		(attrs & DMA_ATTR_NON_CONSISTENT) ?
-+			prot : pgprot_dmacoherent(prot);
- 	return prot;
- }
- 
--- 
-2.17.1
-

projects/Samsung/patches/linux/samsung-0009-MEMEKA-media-s5p-mfc-use-cacheable-DMA-buffers-to-im.patch

@@ -1,36 +0,0 @@
-From f0d2809c31442d62fe568fa32eab20f7e0baf7d8 Mon Sep 17 00:00:00 2001
-From: memeka <mihailescu2m@gmail.com>
-Date: Mon, 30 Oct 2017 09:31:09 +1030
-Subject: [PATCH 09/25] MEMEKA: media: s5p-mfc: use cacheable DMA buffers to
- improve performance
-
-Signed-off-by: memeka <mihailescu2m@gmail.com>
----
- drivers/media/platform/s5p-mfc/s5p_mfc.c | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c b/drivers/media/platform/s5p-mfc/s5p_mfc.c
-index eba2b9f040df..37f2113a00ec 100644
---- a/drivers/media/platform/s5p-mfc/s5p_mfc.c
-+++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c
-@@ -858,7 +858,7 @@ static int s5p_mfc_open(struct file *file)
- 	 * We'll do mostly sequential access, so sacrifice TLB efficiency for
- 	 * faster allocation.
- 	 */
--	q->dma_attrs = DMA_ATTR_ALLOC_SINGLE_PAGES;
-+	q->dma_attrs = DMA_ATTR_ALLOC_SINGLE_PAGES | DMA_ATTR_NON_CONSISTENT | DMA_ATTR_NO_KERNEL_MAPPING;
- 	q->mem_ops = &vb2_dma_contig_memops;
- 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
- 	ret = vb2_queue_init(q);
-@@ -893,7 +893,7 @@ static int s5p_mfc_open(struct file *file)
- 	 * We'll do mostly sequential access, so sacrifice TLB efficiency for
- 	 * faster allocation.
- 	 */
--	q->dma_attrs = DMA_ATTR_ALLOC_SINGLE_PAGES;
-+	q->dma_attrs = DMA_ATTR_ALLOC_SINGLE_PAGES | DMA_ATTR_NON_CONSISTENT | DMA_ATTR_NO_KERNEL_MAPPING;
- 	q->mem_ops = &vb2_dma_contig_memops;
- 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
- 	ret = vb2_queue_init(q);
--- 
-2.17.1
-