Re: [PATCH] media: hantro: HEVC: Fix tile info buffer value computation

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On Wed, Apr 27, 2022 at 03:55:17PM +0200, Benjamin Gaignard wrote:
> Use pps->column_width_minus1[j] + 1 as value for the tile info buffer
> instead of pps->column_width_minus1[j + 1].
> The patch fix DBLK_E_VIXS_2, DBLK_F_VIXS_2, DBLK_G_VIXS_2,
> SAO_B_MediaTek_5, TILES_A_Cisco_2 and TILES_B_Cisco_1 tests in fluster.
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxxxxx>

Fixes: cb5dd5a0fa51 ("media: hantro: Introduce G2/HEVC decoder")

> ---
>  drivers/staging/media/hantro/hantro_g2_hevc_dec.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/media/hantro/hantro_g2_hevc_dec.c b/drivers/staging/media/hantro/hantro_g2_hevc_dec.c
> index bb512389c1a5..ffeb2fbeefd2 100644
> --- a/drivers/staging/media/hantro/hantro_g2_hevc_dec.c
> +++ b/drivers/staging/media/hantro/hantro_g2_hevc_dec.c
> @@ -74,7 +74,7 @@ static void prepare_tile_info_buffer(struct hantro_ctx *ctx)
>  					no_chroma = 1;
>  				for (j = 0, tmp_w = 0; j < num_tile_cols - 1; j++) {
                                                                        ^^^^
Is this "- 1" still required?  I would have assumed the "- 1" here was
connected with the [j + 1].  What is stored in the last element of the
->column_width_minus1 array?

>  					tmp_w += pps->column_width_minus1[j] + 1;
> -					*p++ = pps->column_width_minus1[j + 1];
                                                                        ^^^^^

> +					*p++ = pps->column_width_minus1[j] + 1;
>  					*p++ = h;
>  					if (i == 0 && h == 1 && ctb_size == 16)
>  						no_chroma = 1;

regards,
dan carpenter




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