[PATCH v4 04/12] drm: bridge: samsung-dsim: Handle platform init via driver_data

[Jagan Teki]

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 based
on the DSIM_QUIRK_PLAT_DATA set from respective driver_data.

So, the platforms which enable DSIM_QUIRK_PLAT_DATA 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

v4:
* none

v3:
* update samsung_dsim_plat_probe return value
* add plat_data quirk to handle platform init

v2:
* fix samsung_dsim_plat_probe return pointer

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

Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
 drivers/gpu/drm/bridge/samsung-dsim.c | 16 ++++++++++++++--
 include/drm/bridge/samsung-dsim.h     |  5 +++++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
index 8130845750ac..76dc7687857a 100644
--- a/drivers/gpu/drm/bridge/samsung-dsim.c
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c
@@ -369,6 +369,7 @@ static const struct samsung_dsim_driver_data exynos3_dsi_driver_data = {
 	.wait_for_reset = 1,
 	.num_bits_resol = 11,
 	.reg_values = reg_values,
+	.quirks = DSIM_QUIRK_PLAT_DATA,
 };
 
 static const struct samsung_dsim_driver_data exynos4_dsi_driver_data = {
@@ -381,6 +382,7 @@ static const struct samsung_dsim_driver_data exynos4_dsi_driver_data = {
 	.wait_for_reset = 1,
 	.num_bits_resol = 11,
 	.reg_values = reg_values,
+	.quirks = DSIM_QUIRK_PLAT_DATA,
 };
 
 static const struct samsung_dsim_driver_data exynos5_dsi_driver_data = {
@@ -391,6 +393,7 @@ static const struct samsung_dsim_driver_data exynos5_dsi_driver_data = {
 	.wait_for_reset = 1,
 	.num_bits_resol = 11,
 	.reg_values = reg_values,
+	.quirks = DSIM_QUIRK_PLAT_DATA,
 };
 
 static const struct samsung_dsim_driver_data exynos5433_dsi_driver_data = {
@@ -402,6 +405,7 @@ static const struct samsung_dsim_driver_data exynos5433_dsi_driver_data = {
 	.wait_for_reset = 0,
 	.num_bits_resol = 12,
 	.reg_values = exynos5433_reg_values,
+	.quirks = DSIM_QUIRK_PLAT_DATA,
 };
 
 static const struct samsung_dsim_driver_data exynos5422_dsi_driver_data = {
@@ -413,6 +417,7 @@ static const struct samsung_dsim_driver_data exynos5422_dsi_driver_data = {
 	.wait_for_reset = 1,
 	.num_bits_resol = 12,
 	.reg_values = exynos5422_reg_values,
+	.quirks = DSIM_QUIRK_PLAT_DATA,
 };
 
 static const struct of_device_id samsung_dsim_of_match[] = {
@@ -1609,7 +1614,11 @@ static int samsung_dsim_probe(struct platform_device *pdev)
 	dsi->bridge.of_node = dev->of_node;
 	dsi->bridge.type = DRM_MODE_CONNECTOR_DSI;
 
-	ret = samsung_dsim_plat_probe(dsi);
+	if (dsi->driver_data->quirks & DSIM_QUIRK_PLAT_DATA)
+		ret = samsung_dsim_plat_probe(dsi);
+	else
+		ret = mipi_dsi_host_register(&dsi->dsi_host);
+
 	if (ret)
 		goto err_disable_runtime;
 
@@ -1627,7 +1636,10 @@ static int samsung_dsim_remove(struct platform_device *pdev)
 
 	pm_runtime_disable(&pdev->dev);
 
-	samsung_dsim_plat_remove(dsi);
+	if (dsi->driver_data->quirks & DSIM_QUIRK_PLAT_DATA)
+		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 2e245bffd1b6..97fdee5ef5df 100644
--- a/include/drm/bridge/samsung-dsim.h
+++ b/include/drm/bridge/samsung-dsim.h
@@ -33,6 +33,10 @@ struct samsung_dsim_transfer {
 	u16 rx_done;
 };
 
+enum samsung_dsim_quirks {
+	DSIM_QUIRK_PLAT_DATA		= BIT(0),
+};
+
 struct samsung_dsim_driver_data {
 	const unsigned int *reg_ofs;
 	unsigned int plltmr_reg;
@@ -43,6 +47,7 @@ struct samsung_dsim_driver_data {
 	unsigned int wait_for_reset;
 	unsigned int num_bits_resol;
 	const unsigned int *reg_values;
+	enum samsung_dsim_quirks quirks;
 };
 
 struct samsung_dsim_host_ops {
-- 
2.25.1