evie/android_kernel_oneplus_msm8998
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mdss: dsi: check the clock lane status for overflow recovery sequence

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Implement the overflow recovery sequence only when the clock lane
is not present in stop state. This will prevent from running
the recovery sequence for non fatal overflow errors.

Change-Id: I3a64c9b42d0b112d84f376ab67c6a63c1dc0256e
Signed-off-by: Chandan Uddaraju <chandanu@codeaurora.org>
This commit is contained in:
Chandan Uddaraju 2014-10-14 14:51:51 -07:00 • committed by David Keitel
parent 1a312bb083
commit 56df68ff8c
2 changed files with 25 additions and 7 deletions
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3
drivers/video/fbdev/msm/mdss_dsi.h
View file

@ -176,6 +176,9 @@ enum dsi_pm_type {
#define DSI_BTA_TERM BIT(1)
#define DSI_CMD_TERM BIT(0)
#define DSI_DATA_LANES_STOP_STATE 0xF
#define DSI_CLK_LANE_STOP_STATE BIT(4)
/* offsets for dynamic refresh */
#define DSI_DYNAMIC_REFRESH_CTRL 0x200
#define DSI_DYNAMIC_REFRESH_PIPE_DELAY 0x204

29
drivers/video/fbdev/msm/mdss_dsi_host.c
View file

@ -1940,7 +1940,7 @@ static int dsi_event_thread(void *data)
struct mdss_dsi_ctrl_pdata *ctrl;
unsigned long flag;
struct sched_param param;
u32 todo = 0;
u32 todo = 0, ln_status;
int ret;
param.sched_priority = 16;
@ -1989,13 +1989,28 @@ static int dsi_event_thread(void *data)
mdss_dsi_sw_reset(ctrl, true);
if (todo & DSI_EV_DLNx_FIFO_OVERFLOW) {
pr_debug("%s: Handling overflow event\n",
__func__);
mutex_lock(&dsi_mtx);
mdss_dsi_clk_ctrl(ctrl, DSI_ALL_CLKS, 1);
mdss_dsi_ctl_phy_reset(ctrl);
mdss_dsi_err_intr_ctrl(ctrl, DSI_INTR_ERROR_MASK, 1);
mdss_dsi_clk_ctrl(ctrl, DSI_ALL_CLKS, 0);
/*
* Run the overflow recovery sequence only when
* data lanes are in stop state and
* clock lane is not in Stop State.
*/
ln_status = MIPI_INP(ctrl->ctrl_base + 0x00a8);
pr_debug("%s: lane_status: 0x%x\n",
__func__, ln_status);
if (ctrl->recovery
&& (ln_status
& DSI_DATA_LANES_STOP_STATE)
&& !(ln_status
& DSI_CLK_LANE_STOP_STATE)) {
pr_debug("%s: Handling overflow event.\n",
__func__);
mdss_dsi_clk_ctrl(ctrl, DSI_ALL_CLKS, 1);
mdss_dsi_ctl_phy_reset(ctrl);
mdss_dsi_err_intr_ctrl(ctrl,
DSI_INTR_ERROR_MASK, 1);
mdss_dsi_clk_ctrl(ctrl, DSI_ALL_CLKS, 0);
}
mutex_unlock(&dsi_mtx);
}