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drm.7971
0542-drm-bridge-tc358767-fix-1-lane-behavior.patch
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File 0542-drm-bridge-tc358767-fix-1-lane-behavior.patch of Package drm.7971
From f7170eb80aff7daf2221c94a92ba88dae5f971be Mon Sep 17 00:00:00 2001 From: Andrey Gusakov <andrey.gusakov@cogentembedded.com> Date: Tue, 7 Nov 2017 19:56:24 +0300 Subject: [PATCH] drm/bridge: tc358767: fix 1-lane behavior [ Upstream commit 4dbd6c03fbf88299c573d676838896c6e06aade2 ] Use drm_dp_channel_eq_ok helper Acked-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Andrey Gusakov <andrey.gusakov@cogentembedded.com> Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Link: https://patchwork.freedesktop.org/patch/msgid/1510073785-16108-7-git-send-email-andrey.gusakov@cogentembedded.com Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/gpu/drm/bridge/tc358767.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) --- a/drivers/gpu/drm/bridge/tc358767.c +++ b/drivers/gpu/drm/bridge/tc358767.c @@ -819,8 +819,6 @@ static int tc_main_link_setup(struct tc_ unsigned int rate; u32 dp_phy_ctrl; int timeout; - bool aligned; - bool ready; u32 value; int ret; u8 tmp[8]; @@ -965,16 +963,15 @@ static int tc_main_link_setup(struct tc_ ret = drm_dp_dpcd_read_link_status(aux, tmp + 2); if (ret < 0) goto err_dpcd_read; - ready = (tmp[2] == ((DP_CHANNEL_EQ_BITS << 4) | /* Lane1 */ - DP_CHANNEL_EQ_BITS)); /* Lane0 */ - aligned = tmp[4] & DP_INTERLANE_ALIGN_DONE; - } while ((--timeout) && !(ready && aligned)); + } while ((--timeout) && + !(drm_dp_channel_eq_ok(tmp + 2, tc->link.base.num_lanes))); if (timeout == 0) { /* Read DPCD 0x200-0x201 */ ret = drm_dp_dpcd_read(aux, DP_SINK_COUNT, tmp, 2); if (ret < 0) goto err_dpcd_read; + dev_err(dev, "channel(s) EQ not ok\n"); dev_info(dev, "0x0200 SINK_COUNT: 0x%02x\n", tmp[0]); dev_info(dev, "0x0201 DEVICE_SERVICE_IRQ_VECTOR: 0x%02x\n", tmp[1]); @@ -985,10 +982,6 @@ static int tc_main_link_setup(struct tc_ dev_info(dev, "0x0206 ADJUST_REQUEST_LANE0_1: 0x%02x\n", tmp[6]); - if (!ready) - dev_err(dev, "Lane0/1 not ready\n"); - if (!aligned) - dev_err(dev, "Lane0/1 not aligned\n"); return -EAGAIN; }
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