[PATCH v2] staging: media: meson: vdec: declare u32 as const and static const

[Mitali Borkar]

Declared 32 bit unsigned int as static constant inside a function and
replaced u32[] {x,y} as canvas1, canvas2 in codec_mpeg12.c
This indicates the value of canvas indexes will remain constant throughout 
execution.
Replaced u32 reg_base and u32 reg_name with const u32 reg_base and const
u32 reg_name as it will contain data/registry bases to write static
const indexes declared above and will keep track of of contiguos
registers after each reg_base.
This makes code look better, neater. It improves readability.

Signed-off-by: Mitali Borkar <mitaliborkar...@gmail.com>
---
 drivers/staging/media/meson/vdec/codec_mpeg12.c | 5 +++--
 drivers/staging/media/meson/vdec/vdec_helpers.c | 2 +-
 drivers/staging/media/meson/vdec/vdec_helpers.h | 2 +-
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/media/meson/vdec/codec_mpeg12.c 
b/drivers/staging/media/meson/vdec/codec_mpeg12.c
index 21e93a13356c..861d8584f22f 100644
--- a/drivers/staging/media/meson/vdec/codec_mpeg12.c
+++ b/drivers/staging/media/meson/vdec/codec_mpeg12.c
@@ -65,6 +65,8 @@ static int codec_mpeg12_start(struct amvdec_session *sess)
        struct amvdec_core *core = sess->core;
        struct codec_mpeg12 *mpeg12;
        int ret;
+       static const u32 canvas1[] = { AV_SCRATCH_0, 0 };
+       static const u32 canvas2[] = { 8, 0 }
 
        mpeg12 = kzalloc(sizeof(*mpeg12), GFP_KERNEL);
        if (!mpeg12)
@@ -80,8 +82,7 @@ static int codec_mpeg12_start(struct amvdec_session *sess)
                goto free_mpeg12;
        }
 
-       ret = amvdec_set_canvases(sess, (u32[]){ AV_SCRATCH_0, 0 },
-                                 (u32[]){ 8, 0 });
+       ret = amvdec_set_canvases(sess, canvas1, canvas2);
        if (ret)
                goto free_workspace;
 
diff --git a/drivers/staging/media/meson/vdec/vdec_helpers.c 
b/drivers/staging/media/meson/vdec/vdec_helpers.c
index 7f07a9175815..df5c27266c44 100644
--- a/drivers/staging/media/meson/vdec/vdec_helpers.c
+++ b/drivers/staging/media/meson/vdec/vdec_helpers.c
@@ -177,7 +177,7 @@ static int set_canvas_nv12m(struct amvdec_session *sess,
 }
 
 int amvdec_set_canvases(struct amvdec_session *sess,
-                       u32 reg_base[], u32 reg_num[])
+                       const u32 reg_base[], const u32 reg_num[])
 {
        struct v4l2_m2m_buffer *buf;
        u32 pixfmt = sess->pixfmt_cap;
diff --git a/drivers/staging/media/meson/vdec/vdec_helpers.h 
b/drivers/staging/media/meson/vdec/vdec_helpers.h
index cfaed52ab526..ace8897c34fe 100644
--- a/drivers/staging/media/meson/vdec/vdec_helpers.h
+++ b/drivers/staging/media/meson/vdec/vdec_helpers.h
@@ -17,7 +17,7 @@
  * @reg_num: number of contiguous registers after each reg_base (including it)
  */
 int amvdec_set_canvases(struct amvdec_session *sess,
-                       u32 reg_base[], u32 reg_num[]);
+                       const u32 reg_base[], const u32 reg_num[]);
 
 /* Helpers to read/write to the various IPs (DOS, PARSER) */
 u32 amvdec_read_dos(struct amvdec_core *core, u32 reg);
-- 
2.30.2