On Tue, Sep 24, 2019 at 08:00:49AM +0000, Lowry Li (Arm Technology China) wrote:
> From: "Lowry Li (Arm Technology China)" <lowry...@arm.com>
>
> Adds maximum line size check according to the AFBC decoder limitation
> and special Line size limitation(2046) for format: YUV420_10BIT and X0L2.
>
> Signed-off-by: Lowry Li (Arm Technology China) <lowry...@arm.com>
Reviewed-by: Liviu Dudau <liviu.du...@arm.com>
Best regards,
Liviu
> ---
> .../arm/display/komeda/d71/d71_component.c | 49 +++++++++++++++++++
> 1 file changed, 49 insertions(+)
>
> diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
> b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
> index 357837b9d6ed..6740b8422f11 100644
> --- a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
> +++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
> @@ -349,7 +349,56 @@ static void d71_layer_dump(struct komeda_component *c,
> struct seq_file *sf)
> seq_printf(sf, "%sAD_V_CROP:\t\t0x%X\n", prefix, v[2]);
> }
>
> +static int d71_layer_validate(struct komeda_component *c,
> + struct komeda_component_state *state)
> +{
> + struct komeda_layer_state *st = to_layer_st(state);
> + struct komeda_layer *layer = to_layer(c);
> + struct drm_plane_state *plane_st;
> + struct drm_framebuffer *fb;
> + u32 fourcc, line_sz, max_line_sz;
> +
> + plane_st = drm_atomic_get_new_plane_state(state->obj.state,
> + state->plane);
> + fb = plane_st->fb;
> + fourcc = fb->format->format;
> +
> + if (drm_rotation_90_or_270(st->rot))
> + line_sz = st->vsize - st->afbc_crop_t - st->afbc_crop_b;
> + else
> + line_sz = st->hsize - st->afbc_crop_l - st->afbc_crop_r;
> +
> + if (fb->modifier) {
> + if ((fb->modifier & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK) ==
> + AFBC_FORMAT_MOD_BLOCK_SIZE_32x8)
> + max_line_sz = layer->line_sz;
> + else
> + max_line_sz = layer->line_sz / 2;
> +
> + if (line_sz > max_line_sz) {
> + DRM_DEBUG_ATOMIC("afbc request line_sz: %d exceed the
> max afbc line_sz: %d.\n",
> + line_sz, max_line_sz);
> + return -EINVAL;
> + }
> + }
> +
> + if (fourcc == DRM_FORMAT_YUV420_10BIT && line_sz > 2046 &&
> (st->afbc_crop_l % 4)) {
> + DRM_DEBUG_ATOMIC("YUV420_10BIT input_hsize: %d exceed the max
> size 2046.\n",
> + line_sz);
> + return -EINVAL;
> + }
> +
> + if (fourcc == DRM_FORMAT_X0L2 && line_sz > 2046 && (st->addr[0] % 16)) {
> + DRM_DEBUG_ATOMIC("X0L2 input_hsize: %d exceed the max size
> 2046.\n",
> + line_sz);
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> static const struct komeda_component_funcs d71_layer_funcs = {
> + .validate = d71_layer_validate,
> .update = d71_layer_update,
> .disable = d71_layer_disable,
> .dump_register = d71_layer_dump,
> --
> 2.17.1
>
--
====================
| I would like to |
| fix the world, |
| but they're not |
| giving me the |
\ source code! /
---------------
¯\_(ツ)_/¯
