[PATCH 22/25] drm: kirin: Make driver_data variable non-global

John Stultz
2019-04-23T23:21:36Z

From: Xu YiPing <xuyiping@hisilicon.com>

As part of refactoring the kirin driver to better support
different hardware revisions, this patch changes the driver_data
value to not be a global variable. Instead the driver_data value
is accessed via the of_device_get_match_data() when needed.

Cc: Xinliang Liu <z.liuxinliang@hisilicon.com>
Cc: Rongrong Zou <zourongrong@gmail.com>
Cc: Xinwei Kong <kong.kongxinwei@hisilicon.com>
Cc: Chen Feng <puck.chen@hisilicon.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel <dri-devel@lists.freedesktop.org>
Signed-off-by: Xu YiPing <xuyiping@hisilicon.com>
[jstultz: Reworded commit message]
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c | 43 ++++++++++++++-----------
1 file changed, 24 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c
index a2938d4..634fd58 100644
--- a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c
+++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c
@@ -30,18 +30,9 @@

#include "kirin_drm_drv.h"

-static struct kirin_drm_data *driver_data;

-static int kirin_drm_kms_cleanup(struct drm_device *dev)
-{
- drm_kms_helper_poll_fini(dev);
- driver_data->cleanup(to_platform_device(dev->dev));
- drm_mode_config_cleanup(dev);
-
- return 0;
-}
-
-static int kirin_drm_kms_init(struct drm_device *dev)
+static int kirin_drm_kms_init(struct drm_device *dev,
+ const struct kirin_drm_data *driver_data)
{
int ret;

@@ -97,6 +88,21 @@ static int compare_of(struct device *dev, void *data)
return dev->of_node == data;
}

+static int kirin_drm_kms_cleanup(struct drm_device *dev)
+{
+ const struct kirin_drm_data *driver_data;
+
+ drm_kms_helper_poll_fini(dev);
+
+ driver_data = of_device_get_match_data(dev->dev);
+ if (driver_data->cleanup)
+ driver_data->cleanup(to_platform_device(dev->dev));
+
+ drm_mode_config_cleanup(dev);
+
+ return 0;
+}
+
static int kirin_drm_connectors_register(struct drm_device *dev)
{
struct drm_connector *connector;
@@ -133,15 +139,21 @@ static int kirin_drm_connectors_register(struct drm_device *dev)

static int kirin_drm_bind(struct device *dev)
{
+ struct kirin_drm_data *driver_data;
struct drm_device *drm_dev;
int ret;

+ driver_data = (struct kirin_drm_data *)of_device_get_match_data(dev);
+ if (driver_data == NULL)
+ return -EINVAL;
+
drm_dev = drm_dev_alloc(driver_data->driver, dev);
if (IS_ERR(drm_dev))
return PTR_ERR(drm_dev);
dev_set_drvdata(dev, drm_dev);

- ret = kirin_drm_kms_init(drm_dev);
+ /* display controller init */
+ ret = kirin_drm_kms_init(drm_dev, driver_data);
if (ret)
goto err_drm_dev_put;

@@ -191,12 +203,6 @@ static int kirin_drm_platform_probe(struct platform_device *pdev)
struct component_match *match = NULL;
struct device_node *remote;

- driver_data = (struct kirin_drm_data *)of_device_get_match_data(dev);
- if (!driver_data) {
- DRM_ERROR("failed to get dt id data\n");
- return -EINVAL;
- }
-
remote = of_graph_get_remote_node(np, 0, 0);
if (!remote)
return -ENODEV;
@@ -210,7 +216,6 @@ static int kirin_drm_platform_probe(struct platform_device *pdev)
static int kirin_drm_platform_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &kirin_drm_ops);
- driver_data = NULL;
return 0;
}

--
2.7.4