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drm/msm/dsi: Report PHY errors only when they really occur

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DSI PHY errors are falsely reported whenever a dsi error occurs. This is
because DSI_DLN0_PHY_ERR isn't only used as a status register, but also
used to mask PHY errors. Currently, we end up reading the mask bits too
and therefore always report errors.

Ignore the register mask bits and check for only the status/clear bits.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Archit Taneja 2015-06-25 11:29:24 +05:30 committed by Rob Clark
parent 9b7a9fc29a
commit 01199361c6
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/msm/dsi/dsi_host.c
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@ -1276,7 +1276,11 @@ static void dsi_dln0_phy_err(struct msm_dsi_host *msm_host)
status = dsi_read(msm_host, REG_DSI_DLN0_PHY_ERR);
if (status) {
if (status & (DSI_DLN0_PHY_ERR_DLN0_ERR_ESC |
DSI_DLN0_PHY_ERR_DLN0_ERR_SYNC_ESC |
DSI_DLN0_PHY_ERR_DLN0_ERR_CONTROL |
DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP0 |
DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP1)) {
dsi_write(msm_host, REG_DSI_DLN0_PHY_ERR, status);
msm_host->err_work_state |= DSI_ERR_STATE_DLN0_PHY;
}