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Mon, 16 Jan 2017 02:09:10 -0800 (PST) Received: from localhost.localdomain ([103.29.142.67]) by smtp.gmail.com with ESMTPSA id k78sm46351848pfb.93.2017.01.16.02.09.06 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 16 Jan 2017 02:09:10 -0800 (PST) From: Chris Zhong To: dianders@chromium.org, tfiga@chromium.org, heiko@sntech.de, yzq@rock-chips.com, mark.rutland@arm.com, devicetree@vger.kernel.org, robh+dt@kernel.org, galak@codeaurora.org, pawel.moll@arm.com, seanpaul@chromium.org Subject: [PATCH v2 06/11] drm/rockchip/dsi: return probe defer if attach panel failed Date: Mon, 16 Jan 2017 18:08:26 +0800 Message-Id: <1484561311-494-7-git-send-email-zyw@rock-chips.com> X-Mailer: git-send-email 2.6.3 In-Reply-To: <1484561311-494-1-git-send-email-zyw@rock-chips.com> References: <1484561311-494-1-git-send-email-zyw@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170116_020932_125232_AF801C64 X-CRM114-Status: GOOD ( 10.12 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: David Airlie , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, Chris Zhong , linux-arm-kernel@lists.infradead.org, Mark Yao MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Mark Yao Return -EINVAL would cause mipi dsi bad behavior, probe defer to ensure mipi find the correct mode, Signed-off-by: Mark Yao Signed-off-by: Chris Zhong --- drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c index d2a3efb..5e3f031 100644 --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c @@ -549,10 +549,14 @@ static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host, dsi->channel = device->channel; dsi->format = device->format; dsi->panel = of_drm_find_panel(device->dev.of_node); - if (dsi->panel) - return drm_panel_attach(dsi->panel, &dsi->connector); + if (!dsi->panel) { + DRM_ERROR("failed to find panel\n"); + return -EPROBE_DEFER; + } - return -EINVAL; + drm_panel_attach(dsi->panel, &dsi->connector); + + return 0; } static int dw_mipi_dsi_host_detach(struct mipi_dsi_host *host, @@ -560,7 +564,8 @@ static int dw_mipi_dsi_host_detach(struct mipi_dsi_host *host, { struct dw_mipi_dsi *dsi = host_to_dsi(host); - drm_panel_detach(dsi->panel); + if (dsi->panel) + drm_panel_detach(dsi->panel); return 0; }