[PATCH v3 13/22] drm: zte: Provide ddc symlink in vga connector sysfs directory

Andrzej Pietrasiewicz
2019-06-28T16:01:27Z

drivers/gpu/drm/zte/zx_vga.c | 25 +++++++++----------------
1 file changed, 9 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/zte/zx_vga.c b/drivers/gpu/drm/zte/zx_vga.c
index 1634a08707fb..a3a4d6982888 100644
--- a/drivers/gpu/drm/zte/zx_vga.c
+++ b/drivers/gpu/drm/zte/zx_vga.c
@@ -23,15 +23,11 @@ struct zx_vga_pwrctrl {
u32 mask;
};

-struct zx_vga_i2c {
- struct i2c_adapter adap;
- struct mutex lock;
-};
-
struct zx_vga {
struct drm_connector connector;
struct drm_encoder encoder;
- struct zx_vga_i2c *ddc;
+ /* protects ddc access */
+ struct mutex ddc_lock;
struct device *dev;
void __iomem *mmio;
struct clk *i2c_wclk;
@@ -86,7 +82,7 @@ static int zx_vga_connector_get_modes(struct drm_connector *connector)
*/
zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL, 0);

- edid = drm_get_edid(connector, &vga->ddc->adap);
+ edid = drm_get_edid(connector, connector->ddc);
if (!edid) {
/*
* If EDID reading fails, we set the device state into
@@ -282,11 +278,10 @@ static int zx_vga_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
int num)
{
struct zx_vga *vga = i2c_get_adapdata(adap);
- struct zx_vga_i2c *ddc = vga->ddc;
int ret = 0;
int i;

- mutex_lock(&ddc->lock);
+ mutex_lock(&vga->ddc_lock);

for (i = 0; i < num; i++) {
if (msgs[i].flags & I2C_M_RD)
@@ -301,7 +296,7 @@ static int zx_vga_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
if (!ret)
ret = num;

- mutex_unlock(&ddc->lock);
+ mutex_unlock(&vga->ddc_lock);

return ret;
}
@@ -320,17 +315,15 @@ static int zx_vga_ddc_register(struct zx_vga *vga)
{
struct device *dev = vga->dev;
struct i2c_adapter *adap;
- struct zx_vga_i2c *ddc;
int ret;

- ddc = devm_kzalloc(dev, sizeof(*ddc), GFP_KERNEL);
- if (!ddc)
+ adap = devm_kzalloc(dev, sizeof(*adap), GFP_KERNEL);
+ if (!adap)
return -ENOMEM;

- vga->ddc = ddc;
- mutex_init(&ddc->lock);
+ vga->connector.ddc = adap;
+ mutex_init(&vga->ddc_lock);

- adap = &ddc->adap;
adap->owner = THIS_MODULE;
adap->class = I2C_CLASS_DDC;
adap->dev.parent = dev;
--
2.17.1