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authorBibby Hsieh <bibby.hsieh@mediatek.com>2020-02-17 12:10:19 +0300
committerCK Hu <ck.hu@mediatek.com>2020-02-18 11:14:38 +0300
commit839cbf0531428f3f9535077a461b8631359c1165 (patch)
treeef280a68fe3a4fdb6cd04facace9524e6b29f95c /drivers/gpu/drm/mediatek
parent60fa8c13ab1a33b8b958efb1510ec2fd8a064bcc (diff)
downloadlinux-839cbf0531428f3f9535077a461b8631359c1165.tar.xz
drm/mediatek: Make sure previous message done or be aborted before send
Mediatek CMDQ driver removed atomic parameter and implementation related to atomic. DRM driver need to make sure previous message done or be aborted before we send next message. If previous message is still waiting for event, it means the setting hasn't been updated into display hardware register, we can abort the message and send next message to update the newest setting into display hardware. If previous message already started, we have to wait it until transmission has been completed. So we flush mbox client before we send new message to controller driver. Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com> Signed-off-by: CK Hu <ck.hu@mediatek.com>
Diffstat (limited to 'drivers/gpu/drm/mediatek')
-rw-r--r--drivers/gpu/drm/mediatek/mtk_drm_crtc.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index debcd8e5658a..fe85e487e477 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -486,6 +486,7 @@ static void mtk_drm_crtc_hw_config(struct mtk_drm_crtc *mtk_crtc)
}
#if IS_REACHABLE(CONFIG_MTK_CMDQ)
if (mtk_crtc->cmdq_client) {
+ mbox_flush(mtk_crtc->cmdq_client->chan, 2000);
cmdq_handle = cmdq_pkt_create(mtk_crtc->cmdq_client, PAGE_SIZE);
cmdq_pkt_clear_event(cmdq_handle, mtk_crtc->cmdq_event);
cmdq_pkt_wfe(cmdq_handle, mtk_crtc->cmdq_event);