[PATCH 02/11] drm: bridge: samsung-dsim: Handle platform init via driver_data

From: Jagan Teki <jagan@amarulasolutions.com>
To: Andrzej Hajda <andrzej.hajda@intel.com>,
	Inki Dae <inki.dae@samsung.com>,
	Marek Szyprowski <m.szyprowski@samsung.com>,
	Joonyoung Shim <jy0922.shim@samsung.com>,
	Seung-Woo Kim <sw0312.kim@samsung.com>,
	Kyungmin Park <kyungmin.park@samsung.com>,
	Frieder Schrempf <frieder.schrempf@kontron.de>,
	Fancy Fang <chen.fang@nxp.com>,
	Tim Harvey <tharvey@gateworks.com>,
	Michael Nazzareno Trimarchi <michael@amarulasolutions.com>,
	Adam Ford <aford173@gmail.com>,
	Neil Armstrong <narmstrong@baylibre.com>,
	Robert Foss <robert.foss@linaro.org>,
	Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
	Rob Herring <robh+dt@kernel.org>
Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,
	linux-samsung-soc@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	NXP Linux Team <linux-imx@nxp.com>,
	linux-amarula <linux-amarula@amarulasolutions.com>,
	Jagan Teki <jagan@amarulasolutions.com>
Subject: [PATCH 02/11] drm: bridge: samsung-dsim: Handle platform init via driver_data
Date: Fri,  8 Apr 2022 21:50:59 +0530	[thread overview]
Message-ID: <20220408162108.184583-3-jagan@amarulasolutions.com> (raw)
In-Reply-To: <20220408162108.184583-1-jagan@amarulasolutions.com>

In order to make a common Samsung DSIM bridge driver some platform specific
glue code needs to maintain separately as it is hard to maintain platform
specific glue and conventional component_ops on the drm bridge drivers side.

This patch is trying to support that glue code initialization and invocation
in the form of platform_init flag in driver_data.

So, the platforms which enable platform_init flags will handle all platform
specific initialization via samsung_dsim_plat_probe.

The Platform probe is responsible to
- initialize samsung_dsim_plat_data and install hooks
- initialize component_ops
- preserve samsung_dsim structure pointer

v1:
* use platform_init instead of exynos_specific
* handle component_ops in glue code

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
 drivers/gpu/drm/bridge/samsung-dsim.c | 20 ++++++++++++++++----
 include/drm/bridge/samsung-dsim.h     |  1 +
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
index ee5d7e5518a6..0e6a5d1c7e4e 100644
--- a/drivers/gpu/drm/bridge/samsung-dsim.c
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c
@@ -370,6 +370,7 @@ static const struct samsung_dsim_driver_data exynos3_dsi_driver_data = {
 	.wait_for_reset = 1,
 	.num_bits_resol = 11,
 	.reg_values = reg_values,
+	.platform_init = true,
 };
 
 static const struct samsung_dsim_driver_data exynos4_dsi_driver_data = {
@@ -382,6 +383,7 @@ static const struct samsung_dsim_driver_data exynos4_dsi_driver_data = {
 	.wait_for_reset = 1,
 	.num_bits_resol = 11,
 	.reg_values = reg_values,
+	.platform_init = true,
 };
 
 static const struct samsung_dsim_driver_data exynos5_dsi_driver_data = {
@@ -392,6 +394,7 @@ static const struct samsung_dsim_driver_data exynos5_dsi_driver_data = {
 	.wait_for_reset = 1,
 	.num_bits_resol = 11,
 	.reg_values = reg_values,
+	.platform_init = true,
 };
 
 static const struct samsung_dsim_driver_data exynos5433_dsi_driver_data = {
@@ -403,6 +406,7 @@ static const struct samsung_dsim_driver_data exynos5433_dsi_driver_data = {
 	.wait_for_reset = 0,
 	.num_bits_resol = 12,
 	.reg_values = exynos5433_reg_values,
+	.platform_init = true,
 };
 
 static const struct samsung_dsim_driver_data exynos5422_dsi_driver_data = {
@@ -414,6 +418,7 @@ static const struct samsung_dsim_driver_data exynos5422_dsi_driver_data = {
 	.wait_for_reset = 1,
 	.num_bits_resol = 12,
 	.reg_values = exynos5422_reg_values,
+	.platform_init = true,
 };
 
 static const struct of_device_id samsung_dsim_of_match[] = {
@@ -1565,12 +1570,16 @@ static int samsung_dsim_probe(struct platform_device *pdev)
 	dsi->bridge.of_node = dev->of_node;
 	dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
 
-	dsi->plat_data = samsung_dsim_plat_probe(dsi);
-	if (IS_ERR(dsi->plat_data)) {
+	if (dsi->driver_data->platform_init) {
+		dsi->plat_data = samsung_dsim_plat_probe(dsi);
 		ret = PTR_ERR(dsi->plat_data);
-		goto err_disable_runtime;
+	} else {
+		ret = mipi_dsi_host_register(&dsi->dsi_host);
 	}
 
+	if (ret)
+		goto err_disable_runtime;
+
 	return 0;
 
 err_disable_runtime:
@@ -1585,7 +1594,10 @@ static int samsung_dsim_remove(struct platform_device *pdev)
 
 	pm_runtime_disable(&pdev->dev);
 
-	samsung_dsim_plat_remove(dsi);
+	if (dsi->driver_data->platform_init)
+		samsung_dsim_plat_remove(dsi);
+	else
+		mipi_dsi_host_unregister(&dsi->dsi_host);
 
 	return 0;
 }
diff --git a/include/drm/bridge/samsung-dsim.h b/include/drm/bridge/samsung-dsim.h
index 59a43f9c4477..eca7eacb5910 100644
--- a/include/drm/bridge/samsung-dsim.h
+++ b/include/drm/bridge/samsung-dsim.h
@@ -39,6 +39,7 @@ struct samsung_dsim_driver_data {
 	unsigned int wait_for_reset;
 	unsigned int num_bits_resol;
 	const unsigned int *reg_values;
+	bool platform_init;
 };
 
 struct samsung_dsim_host_ops {
-- 
2.25.1

