From 3f8340cc72c9a1a4b49bce7802afd7f248400ef5 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Thu, 27 Aug 2015 17:23:31 +0300 Subject: [PATCH] drm/radeon/atom: Send out the full AUX address MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit AUX addresses are 20 bits long. Send out the entire address instead of just the low 16 bits. Cc: Alex Deucher Cc: "Christian König" Signed-off-by: Ville Syrjälä Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- drivers/gpu/drm/radeon/atombios_dp.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c index f81e0d7..9cd49c5 100644 --- a/drivers/gpu/drm/radeon/atombios_dp.c +++ b/drivers/gpu/drm/radeon/atombios_dp.c @@ -171,8 +171,9 @@ radeon_dp_aux_transfer_atom(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) return -E2BIG; tx_buf[0] = msg->address & 0xff; - tx_buf[1] = msg->address >> 8; - tx_buf[2] = msg->request << 4; + tx_buf[1] = (msg->address >> 8) & 0xff; + tx_buf[2] = (msg->request << 4) | + ((msg->address >> 16) & 0xf); tx_buf[3] = msg->size ? (msg->size - 1) : 0; switch (msg->request & ~DP_AUX_I2C_MOT) { -- 2.7.4