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path: root/drivers/video/aty/radeon_i2c.c
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Diffstat (limited to 'drivers/video/aty/radeon_i2c.c')
-rw-r--r--drivers/video/aty/radeon_i2c.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/video/aty/radeon_i2c.c b/drivers/video/aty/radeon_i2c.c
index 67675452009..869725a13c2 100644
--- a/drivers/video/aty/radeon_i2c.c
+++ b/drivers/video/aty/radeon_i2c.c
@@ -139,7 +139,13 @@ void radeon_delete_i2c_busses(struct radeonfb_info *rinfo)
int radeon_probe_i2c_connector(struct radeonfb_info *rinfo, int conn,
u8 **out_edid)
{
- u8 *edid = fb_ddc_read(&rinfo->i2c[conn-1].adapter);
+ u32 reg = rinfo->i2c[conn-1].ddc_reg;
+ u8 *edid;
+
+ OUTREG(reg, INREG(reg) &
+ ~(VGA_DDC_DATA_OUTPUT | VGA_DDC_CLK_OUTPUT));
+
+ edid = fb_ddc_read(&rinfo->i2c[conn-1].adapter);
if (out_edid)
*out_edid = edid;