When CONFIG_MTK_CMDQ is enabled, if the display is controlled by the CPU
while other hardware is controlled by the GCE, the display will encounter
a mbox request channel failure.
However, it will still enter the CONFIG_MTK_CMDQ statement, causing the
config_updating flag to never be set to false. As a result, no page flip
event is sent back to user space, and the screen does not update.
Fixes: da03801ad08f ("drm/mediatek: Move mtk_crtc_finish_page_flip() to ddp_cmdq_cb()")
Signed-off-by: Jason-JH Lin <jason-jh.lin@xxxxxxxxxxxx>
---
drivers/gpu/drm/mediatek/mtk_crtc.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_crtc.c b/drivers/gpu/drm/mediatek/mtk_crtc.c
index 5674f5707cca..cfc4867296b8 100644
--- a/drivers/gpu/drm/mediatek/mtk_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_crtc.c
@@ -620,13 +620,14 @@ static void mtk_crtc_update_config(struct mtk_crtc *mtk_crtc, bool needs_vblank)
mbox_send_message(mtk_crtc->cmdq_client.chan, cmdq_handle);
mbox_client_txdone(mtk_crtc->cmdq_client.chan, 0);
+ goto update_config_out;
}
-#else
+#endif
spin_lock_irqsave(&mtk_crtc->config_lock, flags);
mtk_crtc->config_updating = false;
spin_unlock_irqrestore(&mtk_crtc->config_lock, flags);
-#endif
+update_config_out:
mutex_unlock(&mtk_crtc->hw_lock);
}
--
2.43.0
