Re: [PATCH v4 12/14] drm/mediatek: Improve compatibility of display driver
From: AngeloGioacchino Del Regno
Date: Wed Jun 21 2023 - 04:15:39 EST
Il 21/06/23 05:19, Hsiao Chien Sung ha scritto:
- Add new functions to enable/disable components, and
reuse them when clock enable/disable
- Check if the component is defined before using it since
some modules are MT8188 only (ex. PADDING)
- Control components according to its type rather than ID
- Use a for-loop to add/remove components in an arrays,
so we can only maintain this array to make sure every
component will be initialized properly
Signed-off-by: Hsiao Chien Sung <shawn.sung@xxxxxxxxxxxx>
---
.../gpu/drm/mediatek/mtk_disp_ovl_adaptor.c | 186 +++++++++---------
1 file changed, 96 insertions(+), 90 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
index c0a38f5217ee..69ae531294ff 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c
@@ -51,6 +51,7 @@ enum mtk_ovl_adaptor_comp_id {
struct ovl_adaptor_comp_match {
enum mtk_ovl_adaptor_comp_type type;
+ enum mtk_ddp_comp_id comp_id;
int alias_id;
};
@@ -67,21 +68,78 @@ static const char * const private_comp_stem[OVL_ADAPTOR_TYPE_NUM] = {
};
static const struct ovl_adaptor_comp_match comp_matches[OVL_ADAPTOR_ID_MAX] = {
- [OVL_ADAPTOR_MDP_RDMA0] = { OVL_ADAPTOR_TYPE_RDMA, 0 },
- [OVL_ADAPTOR_MDP_RDMA1] = { OVL_ADAPTOR_TYPE_RDMA, 1 },
- [OVL_ADAPTOR_MDP_RDMA2] = { OVL_ADAPTOR_TYPE_RDMA, 2 },
- [OVL_ADAPTOR_MDP_RDMA3] = { OVL_ADAPTOR_TYPE_RDMA, 3 },
- [OVL_ADAPTOR_MDP_RDMA4] = { OVL_ADAPTOR_TYPE_RDMA, 4 },
- [OVL_ADAPTOR_MDP_RDMA5] = { OVL_ADAPTOR_TYPE_RDMA, 5 },
- [OVL_ADAPTOR_MDP_RDMA6] = { OVL_ADAPTOR_TYPE_RDMA, 6 },
- [OVL_ADAPTOR_MDP_RDMA7] = { OVL_ADAPTOR_TYPE_RDMA, 7 },
- [OVL_ADAPTOR_MERGE0] = { OVL_ADAPTOR_TYPE_MERGE, 1 },
- [OVL_ADAPTOR_MERGE1] = { OVL_ADAPTOR_TYPE_MERGE, 2 },
- [OVL_ADAPTOR_MERGE2] = { OVL_ADAPTOR_TYPE_MERGE, 3 },
- [OVL_ADAPTOR_MERGE3] = { OVL_ADAPTOR_TYPE_MERGE, 4 },
- [OVL_ADAPTOR_ETHDR0] = { OVL_ADAPTOR_TYPE_ETHDR, 0 },
+ [OVL_ADAPTOR_ETHDR0] = { OVL_ADAPTOR_TYPE_ETHDR, DDP_COMPONENT_ETHDR_MIXER, 0 },
+ [OVL_ADAPTOR_MDP_RDMA0] = { OVL_ADAPTOR_TYPE_RDMA, DDP_COMPONENT_MDP_RDMA0, 0 },
+ [OVL_ADAPTOR_MDP_RDMA1] = { OVL_ADAPTOR_TYPE_RDMA, DDP_COMPONENT_MDP_RDMA1, 1 },
+ [OVL_ADAPTOR_MDP_RDMA2] = { OVL_ADAPTOR_TYPE_RDMA, DDP_COMPONENT_MDP_RDMA2, 2 },
+ [OVL_ADAPTOR_MDP_RDMA3] = { OVL_ADAPTOR_TYPE_RDMA, DDP_COMPONENT_MDP_RDMA3, 3 },
+ [OVL_ADAPTOR_MDP_RDMA4] = { OVL_ADAPTOR_TYPE_RDMA, DDP_COMPONENT_MDP_RDMA4, 4 },
+ [OVL_ADAPTOR_MDP_RDMA5] = { OVL_ADAPTOR_TYPE_RDMA, DDP_COMPONENT_MDP_RDMA5, 5 },
+ [OVL_ADAPTOR_MDP_RDMA6] = { OVL_ADAPTOR_TYPE_RDMA, DDP_COMPONENT_MDP_RDMA6, 6 },
+ [OVL_ADAPTOR_MDP_RDMA7] = { OVL_ADAPTOR_TYPE_RDMA, DDP_COMPONENT_MDP_RDMA7, 7 },
+ [OVL_ADAPTOR_MERGE0] = { OVL_ADAPTOR_TYPE_MERGE, DDP_COMPONENT_MERGE1, 1 },
+ [OVL_ADAPTOR_MERGE1] = { OVL_ADAPTOR_TYPE_MERGE, DDP_COMPONENT_MERGE2, 2 },
+ [OVL_ADAPTOR_MERGE2] = { OVL_ADAPTOR_TYPE_MERGE, DDP_COMPONENT_MERGE3, 3 },
+ [OVL_ADAPTOR_MERGE3] = { OVL_ADAPTOR_TYPE_MERGE, DDP_COMPONENT_MERGE4, 4 },
};
+static int mtk_ovl_adaptor_enable(struct device *dev, enum mtk_ovl_adaptor_comp_type type)
+{
+ int ret = 0;
int ret;
+
+ if (!dev)
if (!dev)
return -ENODEV;
+ goto end;
+
+ switch (type) {
+ case OVL_ADAPTOR_TYPE_ETHDR:
+ ret = mtk_ethdr_clk_enable(dev);
+ break;
+ case OVL_ADAPTOR_TYPE_MERGE:
+ ret = mtk_merge_clk_enable(dev);
We already have a .clk_enable() callback in struct mtk_ddp_comp_funcs: to
greatly enhance your nice cleanup, you could use that instead, which basically
eliminates the need of having any if branch and/or switch.
+ break;
+ case OVL_ADAPTOR_TYPE_RDMA:
+ // only LARB users need to do this
Please, C-style comments only.
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0) {
+ dev_err(dev, "Failed to enable power domain, error(%d)\n", ret);
+ goto end;
+ }
+ ret = mtk_mdp_rdma_clk_enable(dev);
+ if (ret)
+ pm_runtime_put(dev);
+ break;
+ default:
+ dev_err(dev, "Unknown type: %d\n", type);
Are we supposed to return 0 for unknown type?!
+ }
+
+ if (ret)
+ dev_err(dev, "Failed to enable clock: error(%d)\n", ret);
if (ret) {
dev_err(...)
return ret;
}
return 0;
+
+end:
+ return ret;
+}
+
+static void mtk_ovl_adaptor_disable(struct device *dev, enum mtk_ovl_adaptor_comp_type type)
+{
+ if (!dev)
+ return;
+
+ switch (type) {
+ case OVL_ADAPTOR_TYPE_ETHDR:
+ mtk_ethdr_clk_disable(dev);
+ break;
+ case OVL_ADAPTOR_TYPE_MERGE:
+ mtk_merge_clk_disable(dev);
+ break;
+ case OVL_ADAPTOR_TYPE_RDMA:
+ mtk_mdp_rdma_clk_disable(dev);
+ pm_runtime_put(dev);
+ break;
+ default:
+ dev_err(dev, "Unknown type: %d\n", type);
+ }
+}
+
void mtk_ovl_adaptor_layer_config(struct device *dev, unsigned int idx,
struct mtk_plane_state *state,
struct cmdq_pkt *cmdq_pkt)
@@ -186,72 +244,30 @@ void mtk_ovl_adaptor_stop(struct device *dev)
int mtk_ovl_adaptor_clk_enable(struct device *dev)
{
struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
- struct device *comp;
- int ret;
+ int ret = 0;
Keep `int ret;`
int i;
- for (i = 0; i < OVL_ADAPTOR_MERGE0; i++) {
- comp = ovl_adaptor->ovl_adaptor_comp[i];
- ret = pm_runtime_get_sync(comp);
- if (ret < 0) {
- dev_err(dev, "Failed to enable power domain %d, err %d\n", i, ret);
- goto pwr_err;
- }
- }
-
for (i = 0; i < OVL_ADAPTOR_ID_MAX; i++) {
- comp = ovl_adaptor->ovl_adaptor_comp[i];
-
- if (i < OVL_ADAPTOR_MERGE0)
- ret = mtk_mdp_rdma_clk_enable(comp);
- else if (i < OVL_ADAPTOR_ETHDR0)
- ret = mtk_merge_clk_enable(comp);
- else
- ret = mtk_ethdr_clk_enable(comp);
+ ret = mtk_ovl_adaptor_enable(ovl_adaptor->ovl_adaptor_comp[i],
+ comp_matches[i].type);
if (ret) {
- dev_err(dev, "Failed to enable clock %d, err %d\n", i, ret);
- goto clk_err;
+ while (--i >= 0)
+ mtk_ovl_adaptor_disable(ovl_adaptor->ovl_adaptor_comp[i],
+ comp_matches[i].type);
+ break;
Instead of a break here, just return ret?
}
}
-
- return ret;
-
-clk_err:
- while (--i >= 0) {
- comp = ovl_adaptor->ovl_adaptor_comp[i];
- if (i < OVL_ADAPTOR_MERGE0)
- mtk_mdp_rdma_clk_disable(comp);
- else if (i < OVL_ADAPTOR_ETHDR0)
- mtk_merge_clk_disable(comp);
- else
- mtk_ethdr_clk_disable(comp);
- }
- i = OVL_ADAPTOR_MERGE0;
-
-pwr_err:
- while (--i >= 0)
- pm_runtime_put(ovl_adaptor->ovl_adaptor_comp[i]);
-
return ret;
...and return 0 here.
}
Regards,
Angelo