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Subject[PATCH v3 08/14] drm/mediatek: Get rid of mtk_smi_larb_get/put
Date
MediaTek IOMMU has already added the device_link between the consumer
and smi-larb device. If the drm device call the pm_runtime_get_sync,
the smi-larb's pm_runtime_get_sync also be called automatically.

CC: CK Hu <ck.hu@mediatek.com>
CC: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Evan Green <evgreen@chromium.org>
---
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 14 +-------------
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 30 -----------------------------
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 -
3 files changed, 1 insertion(+), 44 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index a900721..c1e891e 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -10,7 +10,6 @@
#include <drm/drm_probe_helper.h>
#include <linux/clk.h>
#include <linux/pm_runtime.h>
-#include <soc/mediatek/smi.h>

#include "mtk_drm_drv.h"
#include "mtk_drm_crtc.h"
@@ -359,22 +358,13 @@ static void mtk_drm_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_crtc_state *old_state)
{
struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
- struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
int ret;

DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);

- ret = mtk_smi_larb_get(comp->larb_dev);
- if (ret) {
- DRM_ERROR("Failed to get larb: %d\n", ret);
- return;
- }
-
ret = mtk_crtc_ddp_hw_init(mtk_crtc);
- if (ret) {
- mtk_smi_larb_put(comp->larb_dev);
+ if (ret)
return;
- }

drm_crtc_vblank_on(crtc);
mtk_crtc->enabled = true;
@@ -384,7 +374,6 @@ static void mtk_drm_crtc_atomic_disable(struct drm_crtc *crtc,
struct drm_crtc_state *old_state)
{
struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
- struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[0];
int i;

DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
@@ -407,7 +396,6 @@ static void mtk_drm_crtc_atomic_disable(struct drm_crtc *crtc,

drm_crtc_vblank_off(crtc);
mtk_crtc_ddp_hw_fini(mtk_crtc);
- mtk_smi_larb_put(comp->larb_dev);

mtk_crtc->enabled = false;
}
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index b38963f..7dc8496 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -256,15 +256,9 @@ int mtk_ddp_comp_init(struct device *dev, struct device_node *node,
struct mtk_ddp_comp *comp, enum mtk_ddp_comp_id comp_id,
const struct mtk_ddp_comp_funcs *funcs)
{
- enum mtk_ddp_comp_type type;
- struct device_node *larb_node;
- struct platform_device *larb_pdev;
-
if (comp_id < 0 || comp_id >= DDP_COMPONENT_ID_MAX)
return -EINVAL;

- type = mtk_ddp_matches[comp_id].type;
-
comp->id = comp_id;
comp->funcs = funcs ?: mtk_ddp_matches[comp_id].funcs;

@@ -288,30 +282,6 @@ int mtk_ddp_comp_init(struct device *dev, struct device_node *node,
if (IS_ERR(comp->clk))
return PTR_ERR(comp->clk);

- /* Only DMA capable components need the LARB property */
- comp->larb_dev = NULL;
- if (type != MTK_DISP_OVL &&
- type != MTK_DISP_RDMA &&
- type != MTK_DISP_WDMA)
- return 0;
-
- larb_node = of_parse_phandle(node, "mediatek,larb", 0);
- if (!larb_node) {
- dev_err(dev,
- "Missing mediadek,larb phandle in %pOF node\n", node);
- return -EINVAL;
- }
-
- larb_pdev = of_find_device_by_node(larb_node);
- if (!larb_pdev) {
- dev_warn(dev, "Waiting for larb device %pOF\n", larb_node);
- of_node_put(larb_node);
- return -EPROBE_DEFER;
- }
- of_node_put(larb_node);
-
- comp->larb_dev = &larb_pdev->dev;
-
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 0ad287f..108de60 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -83,7 +83,6 @@ struct mtk_ddp_comp {
struct clk *clk;
void __iomem *regs;
int irq;
- struct device *larb_dev;
enum mtk_ddp_comp_id id;
const struct mtk_ddp_comp_funcs *funcs;
};
--
1.9.1
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