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drm: bridge/dw-hdmi: fix 4 block edid read error

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msgs[0].addr will be 0x30 when read edid with more than 2 block.
but still a read edid operation with write DDC_ADDR to
HDMI_I2CM_SLAVE register.So fix it.

Change-Id: I5f0cd9172acd4a68d5b54eaf99f17b45385a4263
Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
This commit is contained in:
Nickey Yang
2017-04-25 15:09:08 +08:00
committed by Tao Huang
parent caa9fa75d6
commit a55aa03a5d
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
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@@ -629,6 +629,8 @@ static int dw_hdmi_i2c_xfer(struct i2c_adapter *adap,
hdmi_writeb(hdmi, 0x00, HDMI_IH_MUTE_I2CM_STAT0);
/* Set slave device address taken from the first I2C message */
if (addr == DDC_SEGMENT_ADDR && msgs[0].len == 1)
addr = DDC_ADDR;
hdmi_writeb(hdmi, addr, HDMI_I2CM_SLAVE);
/* Set slave device register address on transfer */