On Mon, Apr 16, 2018 at 12:01:03PM -0700, Kristian H. Kristensen wrote:
> Rockchip doesn't support per-pixel alpha blending for the lowest
> window in the stack. While the hw supports restacking the windows, we
> don't expose that in KMS, so just filter out alpha formats for the
> primary plane.
>
> Change-Id: I7828d5bf0f0b5c6dd23f9e52aa01a5a683131d2f
Can you please strip this from upstream commit msgs?
> Signed-off-by: Kristian H. Kristensen <hoegsberg@xxxxxxxxxxxx>
> ---
> drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 28 ++++++++++++++++++++++++++--
> 1 file changed, 26 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> index fae37b1cd691..2efe78600fd0 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> @@ -1547,6 +1547,28 @@ static irqreturn_t vop_isr(int irq, void *data)
> return ret;
> }
>
> +static uint32_t formats_for_win(const struct vop_win_phy *phy, uint32_t win,
> + uint32_t *formats, uint32_t max_formats)
> +{
> + uint32_t i, j;
> +
> + BUG_ON(max_formats < phy->nformats);
> +
> + j = 0;
> + for (i = 0; i < phy->nformats; i++) {
> + /*
> + * win0 doesn't support per-pixel alpha, so don't add any RGBA
> + * formats for that plane.
> + */
> + if (win == 0 && is_alpha_support(phy->data_formats[i]))
> + continue;
> +
> + formats[j++] = phy->data_formats[i];
> + }
> +
> + return j;
> +}
> +
> static int vop_create_crtc(struct vop *vop)
> {
> const struct vop_data *vop_data = vop->data;
> @@ -1568,15 +1590,17 @@ static int vop_create_crtc(struct vop *vop)
> for (i = 0; i < vop_data->win_size; i++) {
> struct vop_win *vop_win = &vop->win[i];
> const struct vop_win_data *win_data = vop_win->data;
> + uint32_t nformats, formats[16];
I guess 16 is probably a safe bet, but perhaps either pull it out into a define,
or just devm_kzalloc the format to phy->nformats. If you choose the former, the
loop in formats_for_win should ensure it doesn't overrun formats.
Sean
>
> if (win_data->type != DRM_PLANE_TYPE_PRIMARY &&
> win_data->type != DRM_PLANE_TYPE_CURSOR)
> continue;
>
> + nformats = formats_for_win(win_data->phy, i,
> + formats, ARRAY_SIZE(formats));
> ret = drm_universal_plane_init(vop->drm_dev, &vop_win->base,
> 0, &vop_plane_funcs,
> - win_data->phy->data_formats,
> - win_data->phy->nformats,
> + formats, nformats,
> win_data->phy->format_modifiers,
> win_data->type, NULL);
> if (ret) {
> --
> 2.13.5
>
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--
Sean Paul, Software Engineer, Google / Chromium OS
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