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Date: Wed, 27 Nov 2019 18:04:19 +0800 Message-Id: <20191127100419.130300-1-pihsun@chromium.org> X-Mailer: git-send-email 2.24.0.393.g34dc348eaf-goog MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191127_020428_831377_50CBB5D9 X-CRM114-Status: GOOD ( 12.76 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Daniel Vetter , David Airlie , "moderated list:ARM/Mediatek SoC support" , open list , "open list:DRM DRIVERS FOR MEDIATEK" , Yongqiang Niu , Matthias Brugger , Pi-Hsun Shih , Philipp Zabel , CK Hu , Sean Paul , "moderated list:ARM/Mediatek SoC support" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Yongqiang Niu The original logic is ok for primary display, but will not find out component for external display. For example, plane->index is 6 for external display, but there are only 2 layer nr in external display, and this condition will never happen: if (plane->index < (count + mtk_ddp_comp_layer_nr(comp))) Fix this by using the offset of the plane to mtk_crtc->planes as index, instead of plane->index. Fixes: d6b53f68356f ("drm/mediatek: Add helper to get component for a plane") Signed-off-by: Yongqiang Niu Signed-off-by: Pi-Hsun Shih --- drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c index f80a8ba75977..b34e7d70702a 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c @@ -215,11 +215,12 @@ struct mtk_ddp_comp *mtk_drm_ddp_comp_for_plane(struct drm_crtc *crtc, struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc); struct mtk_ddp_comp *comp; int i, count = 0; + unsigned int local_index = plane - mtk_crtc->planes; for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) { comp = mtk_crtc->ddp_comp[i]; - if (plane->index < (count + mtk_ddp_comp_layer_nr(comp))) { - *local_layer = plane->index - count; + if (local_index < (count + mtk_ddp_comp_layer_nr(comp))) { + *local_layer = local_index - count; return comp; } count += mtk_ddp_comp_layer_nr(comp); base-commit: 1875ff320f14afe21731a6e4c7b46dd33e45dfaa -- 2.24.0.393.g34dc348eaf-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel