[PATCH v7 4/8] drm/bridge: mhdp8546: Set input_bus_flags from atomic_check

From: Aradhya Bhatia
Date: Tue Jun 06 2023 - 04:22:32 EST


From: Nikhil Devshatwar <nikhil.nd@xxxxxx>

input_bus_flags are specified in drm_bridge_timings (legacy) as well
as drm_bridge_state->input_bus_cfg.flags

The flags from the timings will be deprecated. Bridges are supposed
to validate and set the bridge state flags from atomic_check.

Signed-off-by: Nikhil Devshatwar <nikhil.nd@xxxxxx>
[a-bhatia1: replace timings in cdns_mhdp_platform_info by input_bus_flags]
Signed-off-by: Aradhya Bhatia <a-bhatia1@xxxxxx>
Reviewed-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
---

Notes:

changes from v5:
* remove the wrongly addded return statement in tfp410 driver.
* replace the timings field in cdns_mhdp_platform_info by
input_bus_flags field, in order to get rid of bridge->timings
altogether.

changes from v6:
* Add Neil Armstrong's R-b tag.

drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c | 11 ++++++++---
drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h | 2 +-
drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c | 9 ++++-----
drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h | 2 +-
4 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
index afd4e353f37a..f12fb62821f7 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
@@ -2186,6 +2186,13 @@ static int cdns_mhdp_atomic_check(struct drm_bridge *bridge,
return -EINVAL;
}

+ /*
+ * There might be flags negotiation supported in future.
+ * Set the bus flags in atomic_check statically for now.
+ */
+ if (mhdp->info)
+ bridge_state->input_bus_cfg.flags = *mhdp->info->input_bus_flags;
+
mutex_unlock(&mhdp->link_mutex);
return 0;
}
@@ -2551,8 +2558,6 @@ static int cdns_mhdp_probe(struct platform_device *pdev)
mhdp->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
DRM_BRIDGE_OP_HPD;
mhdp->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
- if (mhdp->info)
- mhdp->bridge.timings = mhdp->info->timings;

ret = phy_init(mhdp->phy);
if (ret) {
@@ -2639,7 +2644,7 @@ static const struct of_device_id mhdp_ids[] = {
#ifdef CONFIG_DRM_CDNS_MHDP8546_J721E
{ .compatible = "ti,j721e-mhdp8546",
.data = &(const struct cdns_mhdp_platform_info) {
- .timings = &mhdp_ti_j721e_bridge_timings,
+ .input_bus_flags = &mhdp_ti_j721e_bridge_input_bus_flags,
.ops = &mhdp_ti_j721e_ops,
},
},
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
index bedddd510d17..bad2fc0c7306 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h
@@ -336,7 +336,7 @@ struct cdns_mhdp_bridge_state {
};

struct cdns_mhdp_platform_info {
- const struct drm_bridge_timings *timings;
+ const u32 *input_bus_flags;
const struct mhdp_platform_ops *ops;
};

diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
index dfe1b59514f7..12d04be4e242 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
@@ -71,8 +71,7 @@ const struct mhdp_platform_ops mhdp_ti_j721e_ops = {
.disable = cdns_mhdp_j721e_disable,
};

-const struct drm_bridge_timings mhdp_ti_j721e_bridge_timings = {
- .input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE |
- DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE |
- DRM_BUS_FLAG_DE_HIGH,
-};
+const u32
+mhdp_ti_j721e_bridge_input_bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE |
+ DRM_BUS_FLAG_SYNC_SAMPLE_NEGEDGE |
+ DRM_BUS_FLAG_DE_HIGH;
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
index 97d20d115a24..5ddca07a4255 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.h
@@ -14,6 +14,6 @@
struct mhdp_platform_ops;

extern const struct mhdp_platform_ops mhdp_ti_j721e_ops;
-extern const struct drm_bridge_timings mhdp_ti_j721e_bridge_timings;
+extern const u32 mhdp_ti_j721e_bridge_input_bus_flags;

#endif /* !CDNS_MHDP8546_J721E_H */
--
2.40.1