diff options
| author | Vishnuvardhan Prodduturi <vproddut@codeaurora.org> | 2017-01-20 11:30:57 +0530 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2017-03-06 09:22:30 -0800 |
| commit | d1a2e03ebb9f3993d0e877bf536ffa902019a435 (patch) | |
| tree | 76262d21b960c39d25b87138dc774e5cbde0694c | |
| parent | 9dda3223bc15bbf43babeae3fc704829af4a6e5f (diff) | |
msm: mdss: clear BTA_DONE interrupt during DSI read operations
In cases where DSI DMA done operation is performed but isr is
not triggered due to CPU delays, we clear only the DMA_DONE
interrupt. There is a possibility of a DSI read operation for
DSI command mode panels where the DMA_DONE interrupt is cleared and
DSI link clocks are turned off. After some time, the DSI isr gets
triggered for BTA_DONE interrupt and since DSI link clocks are off,
this causes an interrupt storm due to BTA_DONE interrupt not getting
cleared. Clear the BTA_DONE interrupt as well for cases where DMA_DONE
operation is done but isr not getting triggered.
Change-Id: Iceb02e6dd78f4bbf313e2b4d252d6a30699619f0
Signed-off-by: Padmanabhan Komanduru <pkomandu@codeaurora.org>
Signed-off-by: Vishnuvardhan Prodduturi <vproddut@codeaurora.org>
| -rw-r--r-- | drivers/video/fbdev/msm/mdss_dsi_host.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/video/fbdev/msm/mdss_dsi_host.c b/drivers/video/fbdev/msm/mdss_dsi_host.c index 8b28ee3f530f..d87e89d8901c 100644 --- a/drivers/video/fbdev/msm/mdss_dsi_host.c +++ b/drivers/video/fbdev/msm/mdss_dsi_host.c @@ -2148,8 +2148,8 @@ static int mdss_dsi_cmd_dma_tx(struct mdss_dsi_ctrl_pdata *ctrl, status = reg_val & DSI_INTR_CMD_DMA_DONE; if (status) { reg_val &= DSI_INTR_MASK_ALL; - /* clear CMD DMA isr only */ - reg_val |= DSI_INTR_CMD_DMA_DONE; + /* clear CMD DMA and BTA_DONE isr only */ + reg_val |= (DSI_INTR_CMD_DMA_DONE | DSI_INTR_BTA_DONE); MIPI_OUTP(ctrl->ctrl_base + 0x0110, reg_val); mdss_dsi_disable_irq_nosync(ctrl, DSI_CMD_TERM); complete(&ctrl->dma_comp); |