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Date: Mon, 25 Oct 2021 21:11:54 -0400
From: Sean Paul <sean@...rly.run>
To: Mark Yacoub <markyacoub@...omium.org>
Cc: linux-mediatek@...ts.infradead.org, seanpaul@...omium.org,
Mark Yacoub <markyacoub@...gle.com>,
Chun-Kuang Hu <chunkuang.hu@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Matthias Brugger <matthias.bgg@...il.com>,
dri-devel@...ts.freedesktop.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/mediatek: Set Rotation default value to 1.
On Fri, Oct 22, 2021 at 12:54:02PM -0400, Mark Yacoub wrote:
> From: Mark Yacoub <markyacoub@...gle.com>
>
> [Why]
> The Rotation prob is a bitmask value. It must always have a valid value.
nit: s/prob/prop/
> A default NO rotation is equal to 1 not 0.
>
> [How]
> 1. At the reset hook, call __drm_atomic_helper_plane_reset which is
> called at the initialization of the plane and sets the default value of
> all planes to DRM_MODE_ROTATE_0 which is equal to 1.
> 2. At the ovl layer check, do no overwrite the state->rotation value 0
> if DRM_MODE_ROTATE_0 is set. We should not change the value that the
> userspace has set, especially if it's an unsupported value.
nit: I would probably split these into 2 patches since they're related but
different
Sean
>
> Tested on Jacuzzi(MTK).
> Fixes IGT@..._properties@...ne-properties-{legacy,atomic} and
> IGT@..._properties@..._properties-sanity-{atomic,non-atomic}
>
> Signed-off-by: Mark Yacoub <markyacoub@...omium.org>
> ---
> drivers/gpu/drm/mediatek/mtk_disp_drv.h | 2 +-
> drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 20 +++++++-------------
> drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 5 ++---
> drivers/gpu/drm/mediatek/mtk_drm_plane.c | 3 ++-
> 4 files changed, 12 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> index 86c3068894b11..2fc566964f68e 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
> @@ -64,7 +64,7 @@ void mtk_ovl_config(struct device *dev, unsigned int w,
> unsigned int h, unsigned int vrefresh,
> unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
> int mtk_ovl_layer_check(struct device *dev, unsigned int idx,
> - struct mtk_plane_state *mtk_state);
> + const struct mtk_plane_state *mtk_state);
> void mtk_ovl_layer_config(struct device *dev, unsigned int idx,
> struct mtk_plane_state *state,
> struct cmdq_pkt *cmdq_pkt);
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> index ea5760f856ec6..13999564304bc 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> @@ -190,19 +190,15 @@ unsigned int mtk_ovl_supported_rotations(struct device *dev)
> }
>
> int mtk_ovl_layer_check(struct device *dev, unsigned int idx,
> - struct mtk_plane_state *mtk_state)
> + const struct mtk_plane_state *mtk_state)
> {
> - struct drm_plane_state *state = &mtk_state->base;
> - unsigned int rotation = 0;
> + const struct drm_plane_state *state = &mtk_state->base;
> + unsigned int rotation = drm_rotation_simplify(
> + state->rotation,
> + DRM_MODE_ROTATE_0 | DRM_MODE_REFLECT_X | DRM_MODE_REFLECT_Y);
>
> - rotation = drm_rotation_simplify(state->rotation,
> - DRM_MODE_ROTATE_0 |
> - DRM_MODE_REFLECT_X |
> - DRM_MODE_REFLECT_Y);
> - rotation &= ~DRM_MODE_ROTATE_0;
> -
> - /* We can only do reflection, not rotation */
> - if ((rotation & DRM_MODE_ROTATE_MASK) != 0)
> + /* We can only do reflection, not non-zero rotation */
> + if (((rotation & ~DRM_MODE_ROTATE_0) & DRM_MODE_ROTATE_MASK) != 0)
> return -EINVAL;
>
> /*
> @@ -212,8 +208,6 @@ int mtk_ovl_layer_check(struct device *dev, unsigned int idx,
> if (state->fb->format->is_yuv && rotation != 0)
> return -EINVAL;
>
> - state->rotation = rotation;
> -
> return 0;
> }
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index 1b582262b682b..530bdd031933f 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -53,9 +53,8 @@ struct mtk_ddp_comp_funcs {
> void (*disable_vblank)(struct device *dev);
> unsigned int (*supported_rotations)(struct device *dev);
> unsigned int (*layer_nr)(struct device *dev);
> - int (*layer_check)(struct device *dev,
> - unsigned int idx,
> - struct mtk_plane_state *state);
> + int (*layer_check)(struct device *dev, unsigned int idx,
> + const struct mtk_plane_state *state);
> void (*layer_config)(struct device *dev, unsigned int idx,
> struct mtk_plane_state *state,
> struct cmdq_pkt *cmdq_pkt);
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
> index e6dcb34d30522..accd26481b9fb 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
> @@ -44,9 +44,10 @@ static void mtk_plane_reset(struct drm_plane *plane)
> state = kzalloc(sizeof(*state), GFP_KERNEL);
> if (!state)
> return;
> - plane->state = &state->base;
> }
>
> + __drm_atomic_helper_plane_reset(plane, &state->base);
> +
> state->base.plane = plane;
> state->pending.format = DRM_FORMAT_RGB565;
> }
> --
> 2.33.0.1079.g6e70778dc9-goog
>
--
Sean Paul, Software Engineer, Google / Chromium OS
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