linux-kernel - [PATCH] Remove custom dumb_map_offset implementation in msm driver

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Message-Id: <20231114132713.403443-1-dipamt1729@gmail.com>
Date:   Tue, 14 Nov 2023 18:57:13 +0530
From:   Dipam Turkar <dipamt1729@...il.com>
To:     robdclark@...il.com
Cc:     quic_abhinavk@...cinc.com, dmitry.baryshkov@...aro.org,
        sean@...rly.run, marijn.suijten@...ainline.org, airlied@...il.com,
        daniel@...ll.ch, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, Dipam Turkar <dipamt1729@...il.com>
Subject: [PATCH] Remove custom dumb_map_offset implementation in msm driver

Make msm use drm_gem_create_map_offset() instead of its custom
implementation for associating GEM object with a fake offset. Since,
we already have this generic implementation, we don't need the custom
implementation and it is better to standardize the code for GEM based drivers.

Signed-off-by: Dipam Turkar <dipamt1729@...il.com>
---
 drivers/gpu/drm/msm/msm_drv.c |  2 +-
 drivers/gpu/drm/msm/msm_gem.c | 21 ---------------------
 drivers/gpu/drm/msm/msm_gem.h |  2 --
 3 files changed, 1 insertion(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index a428951ee539..86a15992c717 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -1085,7 +1085,7 @@ static const struct drm_driver msm_driver = {
 	.open               = msm_open,
 	.postclose          = msm_postclose,
 	.dumb_create        = msm_gem_dumb_create,
-	.dumb_map_offset    = msm_gem_dumb_map_offset,
+	.dumb_map_offset    = drm_gem_dumb_map_offset,
 	.gem_prime_import_sg_table = msm_gem_prime_import_sg_table,
 #ifdef CONFIG_DEBUG_FS
 	.debugfs_init       = msm_debugfs_init,
diff --git a/drivers/gpu/drm/msm/msm_gem.c b/drivers/gpu/drm/msm/msm_gem.c
index db1e748daa75..489694ef79cb 100644
--- a/drivers/gpu/drm/msm/msm_gem.c
+++ b/drivers/gpu/drm/msm/msm_gem.c
@@ -671,27 +671,6 @@ int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
 			MSM_BO_SCANOUT | MSM_BO_WC, &args->handle, "dumb");
 }
 
-int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
-		uint32_t handle, uint64_t *offset)
-{
-	struct drm_gem_object *obj;
-	int ret = 0;
-
-	/* GEM does all our handle to object mapping */
-	obj = drm_gem_object_lookup(file, handle);
-	if (obj == NULL) {
-		ret = -ENOENT;
-		goto fail;
-	}
-
-	*offset = msm_gem_mmap_offset(obj);
-
-	drm_gem_object_put(obj);
-
-fail:
-	return ret;
-}
-
 static void *get_vaddr(struct drm_gem_object *obj, unsigned madv)
 {
 	struct msm_gem_object *msm_obj = to_msm_bo(obj);
diff --git a/drivers/gpu/drm/msm/msm_gem.h b/drivers/gpu/drm/msm/msm_gem.h
index 8ddef5443140..dc74a0ef865d 100644
--- a/drivers/gpu/drm/msm/msm_gem.h
+++ b/drivers/gpu/drm/msm/msm_gem.h
@@ -139,8 +139,6 @@ struct page **msm_gem_pin_pages(struct drm_gem_object *obj);
 void msm_gem_unpin_pages(struct drm_gem_object *obj);
 int msm_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
 		struct drm_mode_create_dumb *args);
-int msm_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
-		uint32_t handle, uint64_t *offset);
 void *msm_gem_get_vaddr_locked(struct drm_gem_object *obj);
 void *msm_gem_get_vaddr(struct drm_gem_object *obj);
 void *msm_gem_get_vaddr_active(struct drm_gem_object *obj);
-- 
2.34.1