On Saturday 10 March 2018 03:53 AM, Enric Balletbo i Serra wrote:
From: Douglas Anderson <dianders@xxxxxxxxxxxx> The code in analogix_dp_transfer() that was supposed to print out: AUX CH error happened Was actually dead code. That's because the previous check (whether the interrupt status indicated any errors) would have hit for all errors anyway. Let's combine the two error checks so we can actually see AUX CH errors. We'll also downgrade the message to a warning since some of these types of errors might be expected for some displays. If this gets too noisy we can downgrade again to debug.
Reviewed-by: Archit Taneja <architt@xxxxxxxxxxxxxx> Thanks, Archit
Cc: 征增 王 <wzz@xxxxxxxxxxxxxx> Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx> Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx> Signed-off-by: Thierry Escande <thierry.escande@xxxxxxxxxxxxx> Reviewed-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx> Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> --- drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c index 4eae206ec31b..58e8a28e99aa 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c @@ -1105,6 +1105,7 @@ ssize_t analogix_dp_transfer(struct analogix_dp_device *dp, struct drm_dp_aux_msg *msg) { u32 reg; + u32 status_reg; u8 *buffer = msg->buffer; unsigned int i; int num_transferred = 0; @@ -1193,16 +1194,12 @@ ssize_t analogix_dp_transfer(struct analogix_dp_device *dp,/* Clear interrupt source for AUX CH access error */reg = readl(dp->reg_base + ANALOGIX_DP_INT_STA); - if (reg & AUX_ERR) { + status_reg = readl(dp->reg_base + ANALOGIX_DP_AUX_CH_STA); + if ((reg & AUX_ERR) || (status_reg & AUX_STATUS_MASK)) { writel(AUX_ERR, dp->reg_base + ANALOGIX_DP_INT_STA); - goto aux_error; - }- /* Check AUX CH error access status */- reg = readl(dp->reg_base + ANALOGIX_DP_AUX_CH_STA); - if ((reg & AUX_STATUS_MASK)) { - dev_err(dp->dev, "AUX CH error happened: %d\n\n", - reg & AUX_STATUS_MASK); + dev_warn(dp->dev, "AUX CH error happened: %#x (%d)\n", + status_reg & AUX_STATUS_MASK, !!(reg & AUX_ERR)); goto aux_error; }
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