linux-kernel - [PATCH] drm: rockchip: rk3066

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Message-Id: <20191211203417.19448-1-jbx6244@gmail.com>
Date:   Wed, 11 Dec 2019 21:34:17 +0100
From:   Johan Jonker <jbx6244@...il.com>
To:     heiko@...ech.de
Cc:     hjc@...k-chips.com, airlied@...ux.ie, daniel@...ll.ch,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm: rockchip: rk3066_hdmi: set edid fifo address

From: Nickey Yang <nickey.yang@...k-chips.com>

Fix edid reading error when edid's block > 2.

Signed-off-by: Nickey Yang <nickey.yang@...k-chips.com>
Signed-off-by: Johan Jonker <jbx6244@...il.com>
---
 drivers/gpu/drm/rockchip/rk3066_hdmi.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rk3066_hdmi.c b/drivers/gpu/drm/rockchip/rk3066_hdmi.c
index cdb401f42..945126948 100644
--- a/drivers/gpu/drm/rockchip/rk3066_hdmi.c
+++ b/drivers/gpu/drm/rockchip/rk3066_hdmi.c
@@ -640,6 +640,9 @@ static int rk3066_hdmi_i2c_write(struct rk3066_hdmi *hdmi, struct i2c_msg *msgs)
 	if (msgs->addr == DDC_ADDR)
 		hdmi->i2c->ddc_addr = msgs->buf[0];
 
+	/* Set edid fifo first address. */
+	hdmi_writeb(hdmi, HDMI_EDID_FIFO_ADDR, 0x00);
+
 	/* Set edid word address 0x00/0x80. */
 	hdmi_writeb(hdmi, HDMI_EDID_WORD_ADDR, hdmi->i2c->ddc_addr);
 
-- 
2.11.0