From: Seung-Woo Kim <sw0312.kim@samsung.com>
Date: Tue, 18 Jul 2023 07:23:30 +0000 (+0900)
Subject: amlogic: drm: meson_gem: Add prime_vmap callback functionality for dmabuf
X-Git-Tag: accepted/tizen/unified/20230719.102858^0
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6c8f71c6abf7df5a9da9b6e6724e3903a2215c2b;p=platform%2Fkernel%2Flinux-amlogic.git

amlogic: drm: meson_gem: Add prime_vmap callback functionality for dmabuf

To support dmabuf usage of drm gem from other sub-system like
video4linux, implement prime_vmap and prime_vunmap callback
functions properly.

Change-Id: I7be33a94da753dffc497c023fc9b592e4980d709
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
---

diff --git a/drivers/amlogic/drm/meson_gem.c b/drivers/amlogic/drm/meson_gem.c
index 314045d8d747..522ee432b094 100644
--- a/drivers/amlogic/drm/meson_gem.c
+++ b/drivers/amlogic/drm/meson_gem.c
@@ -655,8 +655,16 @@ struct drm_gem_object *am_meson_gem_prime_import_sg_table(
 
 void *am_meson_gem_prime_vmap(struct drm_gem_object *obj)
 {
+	struct am_meson_gem_object *meson_gem_obj;
+
 	DRM_DEBUG("am_meson_gem_prime_vmap %p.\n", obj);
 
+	meson_gem_obj = to_am_meson_gem_obj(obj);
+
+	if (meson_gem_obj->handle)
+		return ion_map_kernel(meson_gem_obj->handle->client,
+				      meson_gem_obj->handle);
+
 	return NULL;
 }
 
@@ -664,7 +672,15 @@ void am_meson_gem_prime_vunmap(
 	struct drm_gem_object *obj,
 	void *vaddr)
 {
+	struct am_meson_gem_object *meson_gem_obj;
+
 	DRM_DEBUG("am_meson_gem_prime_vunmap nothing to do.\n");
+
+	meson_gem_obj = to_am_meson_gem_obj(obj);
+
+	if (meson_gem_obj->handle)
+		ion_unmap_kernel(meson_gem_obj->handle->client,
+				 meson_gem_obj->handle);
 }
 
 int am_meson_gem_prime_mmap(