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drm/msm/dsi-staging: skip DCS command tx during recovery

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When ESD recovery is underway, then DSI host might be in
a bad state and can not transmit DCS commands. So this
change avoids sending any DCS commands when recovery is
pending.

Change-Id: I85272b6debcca8a2e40a97e1c39d9d8aeb8e31b4
Signed-off-by: Sandeep Panda <spanda@codeaurora.org>
This commit is contained in:
Sandeep Panda 2018-07-04 11:30:34 +05:30 committed by Gerrit - the friendly Code Review server
parent 84797bfc7e
commit b1e56027b1
4 changed files with 15 additions and 7 deletions
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14
drivers/gpu/drm/msm/dsi-staging/dsi_display.c
View File

@ -733,7 +733,7 @@ int dsi_display_check_status(struct drm_connector *connector, void *display,
}
/* Prevent another ESD check,when ESD recovery is underway */
if (panel->esd_recovery_pending) {
if (atomic_read(&panel->esd_recovery_pending)) {
dsi_panel_release_panel_lock(panel);
return rc;
}
@ -769,7 +769,7 @@ int dsi_display_check_status(struct drm_connector *connector, void *display,
false);
} else {
/* Handle Panel failures during display disable sequence */
panel->esd_recovery_pending = true;
atomic_set(&panel->esd_recovery_pending, 1);
}
dsi_display_clk_ctrl(dsi_display->dsi_clk_handle,
@ -2563,7 +2563,7 @@ static int dsi_host_detach(struct mipi_dsi_host *host,
static ssize_t dsi_host_transfer(struct mipi_dsi_host *host,
const struct mipi_dsi_msg *msg)
{
struct dsi_display *display = to_dsi_display(host);
struct dsi_display *display;
int rc = 0, ret = 0;
if (!host || !msg) {
@ -2571,6 +2571,14 @@ static ssize_t dsi_host_transfer(struct mipi_dsi_host *host,
return 0;
}
display = to_dsi_display(host);
/* Avoid sending DCS commands when ESD recovery is pending */
if (atomic_read(&display->panel->esd_recovery_pending)) {
pr_debug("ESD recovery pending\n");
return 0;
}
rc = dsi_display_clk_ctrl(display->dsi_clk_handle,
DSI_ALL_CLKS, DSI_CLK_ON);
if (rc) {

2
drivers/gpu/drm/msm/dsi-staging/dsi_drm.c
View File

@ -156,7 +156,7 @@ static void dsi_bridge_pre_enable(struct drm_bridge *bridge)
return;
}
c_bridge->display->panel->esd_recovery_pending = false;
atomic_set(&c_bridge->display->panel->esd_recovery_pending, 0);
/* By this point mode should have been validated through mode_fixup */
rc = dsi_display_set_mode(c_bridge->display,

4
drivers/gpu/drm/msm/dsi-staging/dsi_panel.c
View File

@ -3717,8 +3717,8 @@ int dsi_panel_disable(struct dsi_panel *panel)
mutex_lock(&panel->panel_lock);
/* Avoid sending panel off commands when ESD recovery is underway */
if (!panel->esd_recovery_pending) {
/* Avoid sending panel off commands when ESD recovery is underway */
if (!atomic_read(&panel->esd_recovery_pending)) {
rc = dsi_panel_tx_cmd_set(panel, DSI_CMD_SET_OFF);
if (rc) {
pr_err("[%s] failed to send DSI_CMD_SET_OFF cmds, rc=%d\n",

2
drivers/gpu/drm/msm/dsi-staging/dsi_panel.h
View File

@ -176,7 +176,7 @@ struct dsi_panel {
bool ulps_enabled;
bool ulps_suspend_enabled;
bool allow_phy_power_off;
bool esd_recovery_pending;
atomic_t esd_recovery_pending;
bool panel_initialized;
bool te_using_watchdog_timer;