From 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 13 May 2024 10:30:14 +0000
Subject: [PATCH] modify sin led gpio
---
kernel/drivers/gpu/drm/mediatek/mtk_drm_gem.c | 96 +++++++++++++++++++++++++++++++----------------
1 files changed, 63 insertions(+), 33 deletions(-)
diff --git a/kernel/drivers/gpu/drm/mediatek/mtk_drm_gem.c b/kernel/drivers/gpu/drm/mediatek/mtk_drm_gem.c
index 259b7b0..b20ea58 100644
--- a/kernel/drivers/gpu/drm/mediatek/mtk_drm_gem.c
+++ b/kernel/drivers/gpu/drm/mediatek/mtk_drm_gem.c
@@ -1,19 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2015 MediaTek Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
*/
-#include <drm/drmP.h>
-#include <drm/drm_gem.h>
#include <linux/dma-buf.h>
+
+#include <drm/drm.h>
+#include <drm/drm_device.h>
+#include <drm/drm_gem.h>
+#include <drm/drm_prime.h>
#include "mtk_drm_drv.h"
#include "mtk_drm_gem.h"
@@ -122,7 +117,7 @@
goto err_handle_create;
/* drop reference from allocate - handle holds it now. */
- drm_gem_object_put_unlocked(&mtk_gem->base);
+ drm_gem_object_put(&mtk_gem->base);
return 0;
@@ -144,12 +139,9 @@
* VM_PFNMAP flag that was set by drm_gem_mmap_obj()/drm_gem_mmap().
*/
vma->vm_flags &= ~VM_PFNMAP;
- vma->vm_pgoff = 0;
ret = dma_mmap_attrs(priv->dma_dev, vma, mtk_gem->cookie,
mtk_gem->dma_addr, obj->size, mtk_gem->dma_attrs);
- if (ret)
- drm_gem_vm_close(vma);
return ret;
}
@@ -175,6 +167,12 @@
return ret;
obj = vma->vm_private_data;
+
+ /*
+ * Set vm_pgoff (used as a fake buffer offset by DRM) to 0 and map the
+ * whole buffer from the start.
+ */
+ vma->vm_pgoff = 0;
return mtk_drm_gem_object_mmap(obj, vma);
}
@@ -212,32 +210,64 @@
struct dma_buf_attachment *attach, struct sg_table *sg)
{
struct mtk_drm_gem_obj *mtk_gem;
- int ret;
- struct scatterlist *s;
- unsigned int i;
- dma_addr_t expected;
+
+ /* check if the entries in the sg_table are contiguous */
+ if (drm_prime_get_contiguous_size(sg) < attach->dmabuf->size) {
+ DRM_ERROR("sg_table is not contiguous");
+ return ERR_PTR(-EINVAL);
+ }
mtk_gem = mtk_drm_gem_init(dev, attach->dmabuf->size);
-
if (IS_ERR(mtk_gem))
return ERR_CAST(mtk_gem);
-
- expected = sg_dma_address(sg->sgl);
- for_each_sg(sg->sgl, s, sg->nents, i) {
- if (sg_dma_address(s) != expected) {
- DRM_ERROR("sg_table is not contiguous");
- ret = -EINVAL;
- goto err_gem_free;
- }
- expected = sg_dma_address(s) + sg_dma_len(s);
- }
mtk_gem->dma_addr = sg_dma_address(sg->sgl);
mtk_gem->sg = sg;
return &mtk_gem->base;
+}
-err_gem_free:
- kfree(mtk_gem);
- return ERR_PTR(ret);
+void *mtk_drm_gem_prime_vmap(struct drm_gem_object *obj)
+{
+ struct mtk_drm_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
+ struct sg_table *sgt;
+ unsigned int npages;
+
+ if (mtk_gem->kvaddr)
+ return mtk_gem->kvaddr;
+
+ sgt = mtk_gem_prime_get_sg_table(obj);
+ if (IS_ERR(sgt))
+ return NULL;
+
+ npages = obj->size >> PAGE_SHIFT;
+ mtk_gem->pages = kcalloc(npages, sizeof(*mtk_gem->pages), GFP_KERNEL);
+ if (!mtk_gem->pages)
+ goto out;
+
+ drm_prime_sg_to_page_addr_arrays(sgt, mtk_gem->pages, NULL, npages);
+
+ mtk_gem->kvaddr = vmap(mtk_gem->pages, npages, VM_MAP,
+ pgprot_writecombine(PAGE_KERNEL));
+ if (!mtk_gem->kvaddr) {
+ kfree(sgt);
+ kfree(mtk_gem->pages);
+ return NULL;
+ }
+out:
+ kfree(sgt);
+
+ return mtk_gem->kvaddr;
+}
+
+void mtk_drm_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
+{
+ struct mtk_drm_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
+
+ if (!mtk_gem->pages)
+ return;
+
+ vunmap(vaddr);
+ mtk_gem->kvaddr = NULL;
+ kfree(mtk_gem->pages);
}
--
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