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From:   Aradhya Bhatia <a-bhatia1@ti.com>
To:     Tomi Valkeinen <tomba@kernel.org>, Jyri Sarha <jyri.sarha@iki.fi>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Andrzej Hajda <andrzej.hajda@intel.com>,
        Neil Armstrong <neil.armstrong@linaro.org>,
        Robert Foss <rfoss@kernel.org>,
        Jonas Karlman <jonas@kwiboo.se>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        Swapnil Jakhade <sjakhade@cadence.com>,
        Boris Brezillon <boris.brezillon@collabora.com>,
        Francesco Dolcini <francesco@dolcini.it>
CC:     DRI Development List <dri-devel@lists.freedesktop.org>,
        Linux Kernel List <linux-kernel@vger.kernel.org>,
        Nishanth Menon <nm@ti.com>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        Rahul T R <r-ravikumar@ti.com>,
        Devarsh Thakkar <devarsht@ti.com>,
        Jayesh Choudhary <j-choudhary@ti.com>,
        Aradhya Bhatia <a-bhatia1@ti.com>
Subject: [PATCH v7 4/8] drm/bridge: mhdp8546: Set input_bus_flags from atomic_check
Date:   Tue, 6 Jun 2023 13:51:38 +0530
Message-ID: <20230606082142.23760-5-a-bhatia1@ti.com>
In-Reply-To: <20230606082142.23760-1-a-bhatia1@ti.com>
References: <20230606082142.23760-1-a-bhatia1@ti.com>
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From: Nikhil Devshatwar <nikhil.nd@ti.com>

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@ti.com>
[a-bhatia1: replace timings in cdns_mhdp_platform_info by input_bus_flags]
Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
---

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