samsung-sm8650/android_kernel_samsung_sm8650-modules
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disp: msm: dsi: flush workers during pre-release

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Wait for asynchronous DSI DCS command transfers to complete
before disabling DSI interrupts during pre-release. This is
required to resolve a race condition where dsi worker threads
can trigger HW access while a VM lend/release is occurring on
the CRTC commit thread.

Change-Id: Ia1f153a2cd008c617dba274473e7678b01a38d29
Signed-off-by: Steve Cohen <cohens@codeaurora.org>
This commit is contained in:
Steve Cohen
2021-10-07 02:35:04 -04:00
parent 629228c353
commit bd01b504a5
1 changed files with 12 additions and 0 deletions
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12
msm/dsi/dsi_display.c
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@@ -5419,6 +5419,7 @@ static int dsi_display_get_io_resources(struct msm_io_res *io_res, void *data)
static int dsi_display_pre_release(void *data) static int dsi_display_pre_release(void *data)
{ {
struct dsi_display *display; struct dsi_display *display;
int i;
if (!data) if (!data)
return -EINVAL; return -EINVAL;
@@ -5428,6 +5429,17 @@ static int dsi_display_pre_release(void *data)
display->hw_ownership = false; display->hw_ownership = false;
mutex_unlock(&display->display_lock); mutex_unlock(&display->display_lock);
/* flush work queues */
display_for_each_ctrl(i, display) {
struct dsi_display_ctrl *ctrl = &display->ctrl[i];
if (!ctrl->ctrl || !(ctrl->ctrl->post_tx_queued))
continue;
flush_workqueue(display->post_cmd_tx_workq);
cancel_work_sync(&ctrl->ctrl->post_cmd_tx_work);
ctrl->ctrl->post_tx_queued = false;
}
dsi_display_ctrl_irq_update(display, false); dsi_display_ctrl_irq_update(display, false);
return 0; return 0;