[PATCH/RFC 6/7] drm: omapdrm: Register omapdrm platform device in omapdss driver

[Laurent Pinchart]

The omapdrm platform device is a virtual device created for the sole
purpose of handling the omapdss/omapdrm driver split. It should
eventually be removed. As a first step to ease refactoring move its
registration from platform code to driver code.

The omapdrm driver name must be changed internally to avoid probing both
the device registered in platform code and the device registered in the
omapdss driver, as that would otherwise break bisection.

Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
 drivers/gpu/drm/omapdrm/dss/core.c | 17 +++++++++++++++++
 drivers/gpu/drm/omapdrm/omap_drv.c |  2 +-
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/omapdrm/dss/core.c b/drivers/gpu/drm/omapdrm/dss/core.c
index 1bf978b5c5bc..b7c44b85b7c3 100644
--- a/drivers/gpu/drm/omapdrm/dss/core.c
+++ b/drivers/gpu/drm/omapdrm/dss/core.c
@@ -22,6 +22,7 @@
 
 #define DSS_SUBSYS_NAME "CORE"
 
+#include <linux/dma-mapping.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/clk.h>
@@ -285,6 +286,16 @@ static void (*dss_output_drv_unreg_funcs[])(void) = {
 	dss_uninit_platform_driver,
 };
 
+#if IS_ENABLED(CONFIG_DRM_OMAP)
+static struct platform_device omap_drm_device = {
+	.dev = {
+		.coherent_dma_mask = DMA_BIT_MASK(32),
+	},
+	.name = "omapdrm_",
+	.id = 0,
+};
+#endif
+
 static int __init omap_dss_init(void)
 {
 	int r;
@@ -300,6 +311,12 @@ static int __init omap_dss_init(void)
 			goto err_reg;
 	}
 
+#if IS_ENABLED(CONFIG_DRM_OMAP)
+	r = platform_device_register(&omap_drm_device);
+	if (r)
+		goto err_reg;
+#endif
+
 	return 0;
 
 err_reg:
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 0e54e3c9c291..581bb12bdd30 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -937,7 +937,7 @@ static SIMPLE_DEV_PM_OPS(omapdrm_pm_ops, omap_drm_suspend, omap_drm_resume);
 
 static struct platform_driver pdev = {
 	.driver = {
-		.name = DRIVER_NAME,
+		.name = "omapdrm_",
 		.pm = &omapdrm_pm_ops,
 	},
 	.probe = pdev_probe,
-- 
Regards,

Laurent Pinchart