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Date: Wed, 21 Jul 2021 09:05:29 -0400
From: Sean Paul <seanpaul@...omium.org>
To: "jason-jh.lin" <jason-jh.lin@...iatek.com>
Cc: Chun-Kuang Hu <chunkuang.hu@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Maxime Ripard <maxime@...no.tech>,
Enric Balletbo i Serra <enric.balletbo@...labora.com>,
fshao@...omium.org, David Airlie <airlied@...ux.ie>,
Thomas Zimmermann <tzimmermann@...e.de>,
singo.chang@...iatek.com,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
dri-devel <dri-devel@...ts.freedesktop.org>,
nancy.lin@...iatek.com, linux-mediatek@...ts.infradead.org,
Linux ARM Kernel <linux-arm-kernel@...ts.infradead.org>,
David-YH.Chiu@...iatek.com, Hsin-Yi Wang <hsinyi@...gle.com>
Subject: Re: [PATCH v3 1/1] drm/mediatek: Fix cursor plane didn't update
On Tue, Jul 20, 2021 at 3:47 AM jason-jh.lin <jason-jh.lin@...iatek.com> wrote:
>
> The cursor plane should use the current plane state hook in
> atomic_async_update because it would not be the new plane state in
> the global atomic state, since drm_atomic_helper_swap_state happened
> when those plane state hook are run.
>
> Fix cursor plane didn't update issue by below modification:
> 1. Remove plane_helper_funcs->atomic_update(plane, state) in
> mtk_drm_crtc_async_update.
> 2. Add mtk_drm_update_new_state into mtk_plane_atomic_async_update to
> update the cursor plane by current plane state hook and add it into
> mtk_plane_atomic_update to update others plane by the new_state.
>
> Fixes: 37418bf14c13 ("drm: Use state helper instead of the plane state pointer")
> Signed-off-by: jason-jh.lin <jason-jh.lin@...iatek.com>
> Tested-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> ---
> drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 1 -
> drivers/gpu/drm/mediatek/mtk_drm_plane.c | 60 ++++++++++++++----------
> 2 files changed, 34 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index 474efb844249..063c75bab3a8 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -538,7 +538,6 @@ void mtk_drm_crtc_async_update(struct drm_crtc *crtc, struct drm_plane *plane,
> if (!mtk_crtc->enabled)
> return;
>
> - plane_helper_funcs->atomic_update(plane, state);
plane_helper_funcs is now unused
../drivers/gpu/drm/mediatek/mtk_drm_crtc.c:578:39: warning: unused
variable ‘plane_helper_funcs’ [-Wunused-variable]
>
> mtk_drm_crtc_update_config(mtk_crtc, false);
> }
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
> index b5582dcf564c..e6dcb34d3052 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
> @@ -110,6 +110,35 @@ static int mtk_plane_atomic_async_check(struct drm_plane *plane,
> true, true);
> }
>
> +static void mtk_plane_update_new_state(struct drm_plane_state *new_state,
> + struct mtk_plane_state *mtk_plane_state)
> +{
> + struct drm_framebuffer *fb = new_state->fb;
> + struct drm_gem_object *gem;
> + struct mtk_drm_gem_obj *mtk_gem;
> + unsigned int pitch, format;
> + dma_addr_t addr;
> +
> + gem = fb->obj[0];
> + mtk_gem = to_mtk_gem_obj(gem);
> + addr = mtk_gem->dma_addr;
> + pitch = fb->pitches[0];
> + format = fb->format->format;
> +
> + addr += (new_state->src.x1 >> 16) * fb->format->cpp[0];
> + addr += (new_state->src.y1 >> 16) * pitch;
> +
> + mtk_plane_state->pending.enable = true;
> + mtk_plane_state->pending.pitch = pitch;
> + mtk_plane_state->pending.format = format;
> + mtk_plane_state->pending.addr = addr;
> + mtk_plane_state->pending.x = new_state->dst.x1;
> + mtk_plane_state->pending.y = new_state->dst.y1;
> + mtk_plane_state->pending.width = drm_rect_width(&new_state->dst);
> + mtk_plane_state->pending.height = drm_rect_height(&new_state->dst);
> + mtk_plane_state->pending.rotation = new_state->rotation;
> +}
> +
> static void mtk_plane_atomic_async_update(struct drm_plane *plane,
> struct drm_atomic_state *state)
> {
> @@ -126,8 +155,10 @@ static void mtk_plane_atomic_async_update(struct drm_plane *plane,
> plane->state->src_h = new_state->src_h;
> plane->state->src_w = new_state->src_w;
> swap(plane->state->fb, new_state->fb);
> - new_plane_state->pending.async_dirty = true;
>
> + mtk_plane_update_new_state(new_state, new_plane_state);
> + wmb(); /* Make sure the above parameters are set before update */
> + new_plane_state->pending.async_dirty = true;
> mtk_drm_crtc_async_update(new_state->crtc, plane, state);
> }
>
> @@ -189,14 +220,8 @@ static void mtk_plane_atomic_update(struct drm_plane *plane,
> struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
> plane);
> struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
> - struct drm_crtc *crtc = new_state->crtc;
> - struct drm_framebuffer *fb = new_state->fb;
> - struct drm_gem_object *gem;
> - struct mtk_drm_gem_obj *mtk_gem;
> - unsigned int pitch, format;
> - dma_addr_t addr;
>
> - if (!crtc || WARN_ON(!fb))
> + if (!new_state->crtc || WARN_ON(!new_state->fb))
> return;
>
> if (!new_state->visible) {
> @@ -204,24 +229,7 @@ static void mtk_plane_atomic_update(struct drm_plane *plane,
> return;
> }
>
> - gem = fb->obj[0];
> - mtk_gem = to_mtk_gem_obj(gem);
> - addr = mtk_gem->dma_addr;
> - pitch = fb->pitches[0];
> - format = fb->format->format;
> -
> - addr += (new_state->src.x1 >> 16) * fb->format->cpp[0];
> - addr += (new_state->src.y1 >> 16) * pitch;
> -
> - mtk_plane_state->pending.enable = true;
> - mtk_plane_state->pending.pitch = pitch;
> - mtk_plane_state->pending.format = format;
> - mtk_plane_state->pending.addr = addr;
> - mtk_plane_state->pending.x = new_state->dst.x1;
> - mtk_plane_state->pending.y = new_state->dst.y1;
> - mtk_plane_state->pending.width = drm_rect_width(&new_state->dst);
> - mtk_plane_state->pending.height = drm_rect_height(&new_state->dst);
> - mtk_plane_state->pending.rotation = new_state->rotation;
> + mtk_plane_update_new_state(new_state, mtk_plane_state);
> wmb(); /* Make sure the above parameters are set before update */
> mtk_plane_state->pending.dirty = true;
> }
> --
> 2.18.0
>
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