drm/msm/mdp5: dump smp state on errors too

If the dumpstate modparam is enabled, for debugging error irq's, also
dump SMP state.

Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/mdp/mdp5/mdp5_irq.c

@@ -41,6 +41,8 @@ static void mdp5_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
 	if (dumpstate && __ratelimit(&rs)) {
 		struct drm_printer p = drm_info_printer(mdp5_kms->dev->dev);
 		drm_state_dump(mdp5_kms->dev, &p);
+		if (mdp5_kms->smp)
+			mdp5_smp_dump(mdp5_kms->smp, &p);
 	}
 }
 

drivers/gpu/drm/msm/mdp/mdp5/mdp5_smp.c

@@ -302,7 +302,8 @@ void mdp5_smp_dump(struct mdp5_smp *smp, struct drm_printer *p)
 	drm_printf(p, "name\tinuse\tplane\n");
 	drm_printf(p, "----\t-----\t-----\n");
 
-	drm_modeset_lock(&mdp5_kms->state_lock, NULL);
+	if (drm_can_sleep())
+		drm_modeset_lock(&mdp5_kms->state_lock, NULL);
 
 	/* grab these *after* we hold the state_lock */
 	hwpstate = &mdp5_kms->state->hwpipe;
@@ -329,7 +330,8 @@ void mdp5_smp_dump(struct mdp5_smp *smp, struct drm_printer *p)
 	drm_printf(p, "AVAIL:\t%d\n", smp->blk_cnt -
 			bitmap_weight(state->state, smp->blk_cnt));
 
-	drm_modeset_unlock(&mdp5_kms->state_lock);
+	if (drm_can_sleep())
+		drm_modeset_unlock(&mdp5_kms->state_lock);
 }
 
 void mdp5_smp_destroy(struct mdp5_smp *smp)