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Date: Thu, 16 Mar 2017 11:31:44 +0800 From: Chris Zhong <zyw@...k-chips.com> To: linux-rockchip@...ts.infradead.org Cc: Chris Zhong <zyw@...k-chips.com>, Mark Yao <mark.yao@...k-chips.com>, David Airlie <airlied@...ux.ie>, Heiko Stuebner <heiko@...ech.de>, dri-devel@...ts.freedesktop.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: [PATCH v2 1/4] drm/rockchip/dsi: check phy_cfg_clk only for RK3399 For RK3399, the phy_cfg_clk is a required clock, if phy_cfg_clk is disabled, MIPI phy can not work. Let's return a error if there is no phy_cfg_clk in dts property, when the pdata match RK3399. Signed-off-by: Chris Zhong <zyw@...k-chips.com> --- Changes in v2: None drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c index f84f9ae..11c4166 100644 --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c @@ -1227,15 +1227,13 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master, clk_disable_unprepare(dsi->pclk); } - dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg"); - if (IS_ERR(dsi->phy_cfg_clk)) { - ret = PTR_ERR(dsi->phy_cfg_clk); - if (ret != -ENOENT) { + if (pdata == &rk3399_mipi_dsi_drv_data) { + dsi->phy_cfg_clk = devm_clk_get(dev, "phy_cfg"); + if (IS_ERR(dsi->phy_cfg_clk)) { + ret = PTR_ERR(dsi->phy_cfg_clk); dev_err(dev, "Unable to get phy_cfg_clk: %d\n", ret); return ret; } - dsi->phy_cfg_clk = NULL; - dev_dbg(dev, "have not phy_cfg_clk\n"); } ret = clk_prepare_enable(dsi->pllref_clk); -- 2.6.3
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