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msm: mdss: dp: fix watchdog reset with DP connected in AOD mode

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With DP connected and device in AOD mode, DP is powered off during
suspend operation. But at the same time, if device receives HPD_IRQ
attention event, DP driver is trying to access unclocked registers.
Handle HPD_IRQ attention event only if DP is fully powered ON.

Change-Id: I425e34e8456fb828c1bddd6e0b4bf92772092a61
Signed-off-by: Narender Ankam <nankam@codeaurora.org>
This commit is contained in:
Narender Ankam 2017-06-28 17:16:58 +05:30
parent f2485229cd
commit 7c5760d495
1 changed files with 9 additions and 6 deletions
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15
drivers/video/fbdev/msm/mdss_dp.c
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@ -3978,12 +3978,6 @@ static int mdss_dp_process_hpd_irq_high(struct mdss_dp_drv_pdata *dp)
{ {
int ret = 0; int ret = 0;
/* In case of HPD_IRQ events without DP link being turned on such as
* adb shell stop, skip handling hpd_irq event.
*/
if (!dp->dp_initialized)
goto exit;
pr_debug("start\n"); pr_debug("start\n");
dp->hpd_irq_on = true; dp->hpd_irq_on = true;
@ -4099,6 +4093,15 @@ static void mdss_dp_process_attention(struct mdss_dp_drv_pdata *dp_drv)
if (dp_drv->alt_mode.dp_status.hpd_irq) { if (dp_drv->alt_mode.dp_status.hpd_irq) {
pr_debug("Attention: hpd_irq high\n"); pr_debug("Attention: hpd_irq high\n");
/* In case of HPD_IRQ events without DP link being
* turned on such as adb shell stop, skip handling
* hpd_irq event.
*/
if (!dp_drv->dp_initialized) {
pr_err("DP not initialized yet\n");
return;
}
if (dp_is_hdcp_enabled(dp_drv) && dp_drv->hdcp.ops->cp_irq) { if (dp_is_hdcp_enabled(dp_drv) && dp_drv->hdcp.ops->cp_irq) {
if (!dp_drv->hdcp.ops->cp_irq(dp_drv->hdcp.data)) if (!dp_drv->hdcp.ops->cp_irq(dp_drv->hdcp.data))
return; return;