From: CK Hu ck.hu@mediatek.com
Moving mutex resource management from client driver to mutex driver could prevent client drivers negotiating for resource management.
Signed-off-by: CK Hu ck.hu@mediatek.com Signed-off-by: Chun-Kuang Hu chunkuang.hu@kernel.org --- drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 2 +- drivers/gpu/drm/mediatek/mtk_mutex.c | 16 ++++++++-------- drivers/gpu/drm/mediatek/mtk_mutex.h | 2 +- 3 files changed, 10 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c index bba87a036fa8..1e3a9450680b 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c @@ -773,7 +773,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev, if (!mtk_crtc->ddp_comp) return -ENOMEM;
- mtk_crtc->mutex = mtk_mutex_get(priv->mutex_dev, pipe); + mtk_crtc->mutex = mtk_mutex_get(priv->mutex_dev); if (IS_ERR(mtk_crtc->mutex)) { ret = PTR_ERR(mtk_crtc->mutex); dev_err(dev, "Failed to get mutex: %d\n", ret); diff --git a/drivers/gpu/drm/mediatek/mtk_mutex.c b/drivers/gpu/drm/mediatek/mtk_mutex.c index 98a060bf225d..66344759e622 100644 --- a/drivers/gpu/drm/mediatek/mtk_mutex.c +++ b/drivers/gpu/drm/mediatek/mtk_mutex.c @@ -228,18 +228,18 @@ static const struct mtk_mutex_data mt8173_mutex_driver_data = { .mutex_sof_reg = MT2701_MUTEX0_SOF0, };
-struct mtk_mutex *mtk_mutex_get(struct device *dev, unsigned int id) +struct mtk_mutex *mtk_mutex_get(struct device *dev) { struct mtk_mutex_ctx *mtx = dev_get_drvdata(dev); + int i;
- if (id >= 10) - return ERR_PTR(-EINVAL); - if (mtx->mutex[id].claimed) - return ERR_PTR(-EBUSY); - - mtx->mutex[id].claimed = true; + for (i = 0; i < 10; i++) + if (!mtx->mutex[i].claimed) { + mtx->mutex[i].claimed = true; + return &mtx->mutex[i]; + }
- return &mtx->mutex[id]; + return ERR_PTR(-EBUSY); }
void mtk_mutex_put(struct mtk_mutex *mutex) diff --git a/drivers/gpu/drm/mediatek/mtk_mutex.h b/drivers/gpu/drm/mediatek/mtk_mutex.h index b678e0988a37..6fe4ffbde290 100644 --- a/drivers/gpu/drm/mediatek/mtk_mutex.h +++ b/drivers/gpu/drm/mediatek/mtk_mutex.h @@ -10,7 +10,7 @@ struct regmap; struct device; struct mtk_mutex;
-struct mtk_mutex *mtk_mutex_get(struct device *dev, unsigned int id); +struct mtk_mutex *mtk_mutex_get(struct device *dev); int mtk_mutex_prepare(struct mtk_mutex *mutex); void mtk_mutex_add_comp(struct mtk_mutex *mutex, enum mtk_ddp_comp_id id);