* [PATCH] drm/mediatek: simplify mtk_crtc allocation
@ 2026-03-31 0:23 Rosen Penev
2026-05-08 6:43 ` CK Hu (胡俊光)
0 siblings, 1 reply; 2+ messages in thread
From: Rosen Penev @ 2026-03-31 0:23 UTC (permalink / raw)
To: dri-devel
Cc: Chun-Kuang Hu, Philipp Zabel, David Airlie, Simona Vetter,
Matthias Brugger, AngeloGioacchino Del Regno,
moderated list:DRM DRIVERS FOR MEDIATEK,
open list:ARM/Mediatek SoC support,
moderated list:ARM/Mediatek SoC support
Use a flexible array member to combine allocations.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
drivers/gpu/drm/mediatek/mtk_crtc.c | 13 ++++---------
1 file changed, 4 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_crtc.c b/drivers/gpu/drm/mediatek/mtk_crtc.c
index fcb16f3f7b23..914841d2396e 100644
--- a/drivers/gpu/drm/mediatek/mtk_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_crtc.c
@@ -62,7 +62,6 @@ struct mtk_crtc {
struct device *dma_dev;
struct mtk_mutex *mutex;
unsigned int ddp_comp_nr;
- struct mtk_ddp_comp **ddp_comp;
unsigned int num_conn_routes;
const struct mtk_drm_route *conn_routes;
@@ -71,6 +70,8 @@ struct mtk_crtc {
bool config_updating;
/* lock for config_updating to cmd buffer */
spinlock_t config_lock;
+
+ struct mtk_ddp_comp *ddp_comp[];
};
struct mtk_crtc_state {
@@ -1048,18 +1049,12 @@ int mtk_crtc_create(struct drm_device *drm_dev, const unsigned int *path,
}
}
- mtk_crtc = devm_kzalloc(dev, sizeof(*mtk_crtc), GFP_KERNEL);
+ mtk_crtc = devm_kzalloc(dev, struct_size(mtk_crtc, ddp_comp, path_len + (conn_routes ? 1 : 0)), GFP_KERNEL);
if (!mtk_crtc)
return -ENOMEM;
- mtk_crtc->mmsys_dev = priv->mmsys_dev;
mtk_crtc->ddp_comp_nr = path_len;
- mtk_crtc->ddp_comp = devm_kcalloc(dev,
- mtk_crtc->ddp_comp_nr + (conn_routes ? 1 : 0),
- sizeof(*mtk_crtc->ddp_comp),
- GFP_KERNEL);
- if (!mtk_crtc->ddp_comp)
- return -ENOMEM;
+ mtk_crtc->mmsys_dev = priv->mmsys_dev;
mtk_crtc->mutex = mtk_mutex_get(priv->mutex_dev);
if (IS_ERR(mtk_crtc->mutex)) {
--
2.53.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] drm/mediatek: simplify mtk_crtc allocation
2026-03-31 0:23 [PATCH] drm/mediatek: simplify mtk_crtc allocation Rosen Penev
@ 2026-05-08 6:43 ` CK Hu (胡俊光)
0 siblings, 0 replies; 2+ messages in thread
From: CK Hu (胡俊光) @ 2026-05-08 6:43 UTC (permalink / raw)
To: dri-devel@lists.freedesktop.org, rosenp@gmail.com
Cc: chunkuang.hu@kernel.org, simona@ffwll.ch,
AngeloGioacchino Del Regno, airlied@gmail.com,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, p.zabel@pengutronix.de,
linux-mediatek@lists.infradead.org, matthias.bgg@gmail.com
On Mon, 2026-03-30 at 17:23 -0700, Rosen Penev wrote:
> External email : Please do not click links or open attachments until you have verified the sender or the content.
>
>
> Use a flexible array member to combine allocations.
Reviewed-by: CK Hu <ck.hu@mediatek.com>
>
> Signed-off-by: Rosen Penev <rosenp@gmail.com>
> ---
> drivers/gpu/drm/mediatek/mtk_crtc.c | 13 ++++---------
> 1 file changed, 4 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_crtc.c b/drivers/gpu/drm/mediatek/mtk_crtc.c
> index fcb16f3f7b23..914841d2396e 100644
> --- a/drivers/gpu/drm/mediatek/mtk_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_crtc.c
> @@ -62,7 +62,6 @@ struct mtk_crtc {
> struct device *dma_dev;
> struct mtk_mutex *mutex;
> unsigned int ddp_comp_nr;
> - struct mtk_ddp_comp **ddp_comp;
> unsigned int num_conn_routes;
> const struct mtk_drm_route *conn_routes;
>
> @@ -71,6 +70,8 @@ struct mtk_crtc {
> bool config_updating;
> /* lock for config_updating to cmd buffer */
> spinlock_t config_lock;
> +
> + struct mtk_ddp_comp *ddp_comp[];
> };
>
> struct mtk_crtc_state {
> @@ -1048,18 +1049,12 @@ int mtk_crtc_create(struct drm_device *drm_dev, const unsigned int *path,
> }
> }
>
> - mtk_crtc = devm_kzalloc(dev, sizeof(*mtk_crtc), GFP_KERNEL);
> + mtk_crtc = devm_kzalloc(dev, struct_size(mtk_crtc, ddp_comp, path_len + (conn_routes ? 1 : 0)), GFP_KERNEL);
> if (!mtk_crtc)
> return -ENOMEM;
>
> - mtk_crtc->mmsys_dev = priv->mmsys_dev;
> mtk_crtc->ddp_comp_nr = path_len;
> - mtk_crtc->ddp_comp = devm_kcalloc(dev,
> - mtk_crtc->ddp_comp_nr + (conn_routes ? 1 : 0),
> - sizeof(*mtk_crtc->ddp_comp),
> - GFP_KERNEL);
> - if (!mtk_crtc->ddp_comp)
> - return -ENOMEM;
> + mtk_crtc->mmsys_dev = priv->mmsys_dev;
>
> mtk_crtc->mutex = mtk_mutex_get(priv->mutex_dev);
> if (IS_ERR(mtk_crtc->mutex)) {
> --
> 2.53.0
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2026-05-08 6:43 ` CK Hu (胡俊光)
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