drm/bridge: adv7511: add support for the 2nd chip

The Renesas Wheat board has 2 ADV7513 chips on the same I2C bus, however
the ADV751x driver only supports 1 chip as it tries to assign the packet/
EDID/CEC memory I2C devices to the fixed I2C addresses. Assign these I2C
addresses at the fixed offsets (derived from the programming guide) from
the main register map address instead.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1580212.O1LYdJFM97@wasted.cogentembedded.com

diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
index ec8fb2e..8ed3906 100644 (file)
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -922,15 +922,13 @@ static int adv7511_parse_dt(struct device_node *np,
        return 0;
 }
 
-static const int edid_i2c_addr = 0x7e;
-static const int packet_i2c_addr = 0x70;
-static const int cec_i2c_addr = 0x78;
-
 static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 {
        struct adv7511_link_config link_config;
        struct adv7511 *adv7511;
        struct device *dev = &i2c->dev;
+       unsigned int main_i2c_addr = i2c->addr << 1;
+       unsigned int edid_i2c_addr = main_i2c_addr + 4;
        unsigned int val;
        int ret;
 
@@ -991,8 +989,10 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
 
        regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR, edid_i2c_addr);
        regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR,
-                    packet_i2c_addr);
-       regmap_write(adv7511->regmap, ADV7511_REG_CEC_I2C_ADDR, cec_i2c_addr);
+                    main_i2c_addr - 0xa);
+       regmap_write(adv7511->regmap, ADV7511_REG_CEC_I2C_ADDR,
+                    main_i2c_addr - 2);
+
        adv7511_packet_disable(adv7511, 0xffff);
 
        adv7511->i2c_main = i2c;

diff --git a/drivers/gpu/drm/bridge/adv7511/adv7533.c b/drivers/gpu/drm/bridge/adv7511/adv7533.c
index 5eebd15..d7f7b7c 100644 (file)
--- a/drivers/gpu/drm/bridge/adv7511/adv7533.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7533.c
@@ -149,13 +149,12 @@ void adv7533_uninit_cec(struct adv7511 *adv)
        i2c_unregister_device(adv->i2c_cec);
 }
 
-static const int cec_i2c_addr = 0x78;
-
 int adv7533_init_cec(struct adv7511 *adv)
 {
        int ret;
 
-       adv->i2c_cec = i2c_new_dummy(adv->i2c_main->adapter, cec_i2c_addr >> 1);
+       adv->i2c_cec = i2c_new_dummy(adv->i2c_main->adapter,
+                                    adv->i2c_main->addr - 1);
        if (!adv->i2c_cec)
                return -ENOMEM;