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Lin" , Moudy Ho , Hsiao Chien Sung , "Jason-JH . Lin" , Nathan Lu , , , , , Subject: [PATCH v10 23/24] drm/mediatek: Fix underrun in VDO1 when switches off the layer Date: Thu, 19 Oct 2023 13:56:18 +0800 Message-ID: <20231019055619.19358-24-shawn.sung@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20231019055619.19358-1-shawn.sung@mediatek.com> References: <20231019055619.19358-1-shawn.sung@mediatek.com> MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--0.429600-8.000000 X-TMASE-MatchedRID: aRklFmtZ23BQlz7zzALRPqKa0xB73sAA7yWPaQc4INS0rcU5V/oSe8Ht HEmxq9+YYM3P0vRsc0DnftxNodBrx0c58yUI8WvNQ4srjeRbxTZCX8V1FiRRkjdlsYL2g/87xhL ap7By3FlX6UIPOG+iLYAGGZdCG6IYHxPMjOKY7A8LbigRnpKlKZvjAepGmdoOuzWZSe9bpwlKMn xvHPr3Lj/S/4Fp/m7C70j4gBQf6c8A81qNtiL9iCjCD/8vFIPkWsiUW0takmD4VH37RoClPds5P cWL6yHKSZrfNhP3sgUBh9AgBSEFrJm+YJspVvj2xkvrHlT8euJ0YHKn7N1oOA== X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--0.429600-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: 0BB91304C2E49AC9F5E890F0C4820A3EDC72EF4E07FB41161E14A9D6A9DDA6932000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231019_065756_776922_5726EAB1 X-CRM114-Status: GOOD ( 10.30 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Do not reset Merge while using CMDQ because reset API doesn't wait for frame done event as CMDQ does and could lead to underrun when the layer is switching off. Fixes: aaf94f7c3ae6 ("drm/mediatek: Add display merge async reset control") Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: CK Hu Signed-off-by: Hsiao Chien Sung --- drivers/gpu/drm/mediatek/mtk_disp_merge.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/mediatek/mtk_disp_merge.c b/drivers/gpu/drm/mediatek/mtk_disp_merge.c index fd14a59bc951..c19fb1836034 100644 --- a/drivers/gpu/drm/mediatek/mtk_disp_merge.c +++ b/drivers/gpu/drm/mediatek/mtk_disp_merge.c @@ -104,7 +104,7 @@ void mtk_merge_stop_cmdq(struct device *dev, struct cmdq_pkt *cmdq_pkt) mtk_ddp_write(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs, DISP_REG_MERGE_CTRL); - if (priv->async_clk) + if (!cmdq_pkt && priv->async_clk) reset_control_reset(priv->reset_ctl); }