Commit 4f71c5de authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt Committed by Linus Torvalds
Browse files

[PATCH] Fix radeon DDC regression



When radeonfb was changed to use the new "generic" ddc, a bit of
code initializing the GPIO lines was lost, causing it to not work
if the firmware didn't configure them properly, which seems to
happen on some cards.
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 1b9bb3c1
......@@ -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;
......
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