On 12/04/2021 14:45, Mitali Borkar wrote:
> On Mon, Apr 12, 2021 at 11:17:22AM +0200, Hans Verkuil wrote:
>> On 10/04/2021 21:59, Mitali Borkar wrote:
>>> 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 <mitaliborkar810@xxxxxxxxx>
>>> ---
>>> drivers/staging/media/meson/vdec/codec_mpeg12.c | 5 +++--
>>
>> Also change drivers/staging/media/meson/vdec/codec_h264.c.
>>
>> It's a nice improvement, so let's do this for both callers of amvdec_set_canvases().
>>
> I have done chnages in codec_h264.c Now, should I send that as new
> patch?
Yes please,
Neil
>
>> Regards,
>>
>> Hans
>>
>>> 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);
>>>
>>
