From mboxrd@z Thu Jan 1 00:00:00 1970 From: seanpaul@chromium.org (Sean Paul) Date: Wed, 1 Feb 2017 13:41:27 -0500 Subject: [PATCH v4 2/6] drm/rockchip/dsi: dw-mipi: support RK3399 mipi dsi In-Reply-To: <1485225486-669-3-git-send-email-zyw@rock-chips.com> References: <1485225486-669-1-git-send-email-zyw@rock-chips.com> <1485225486-669-3-git-send-email-zyw@rock-chips.com> Message-ID: <20170201184127.GB8595@art_vandelay> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, Jan 24, 2017 at 10:38:02AM +0800, Chris Zhong wrote: > The vopb/vopl switch register of RK3399 mipi is different from RK3288, > the default setting for mipi dsi mode is different too, so add a > of_device_id structure to distinguish them, and make sure set the > correct mode before mipi phy init. > > Signed-off-by: Chris Zhong > Signed-off-by: Mark Yao > > --- > > Changes in v4: > - remove the unrelated change > > Changes in v3: > - base on John Keeping's patch series > > drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 68 +++++++++++++++++++++++++++++----- > 1 file changed, 58 insertions(+), 10 deletions(-) > > diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c > index 45af890..b7b67be 100644 > --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c > +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c > @@ -1249,6 +1293,10 @@ 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)) > + dev_dbg(dev, "have not phy_cfg_clk\n"); You should differentiate between ENODEV and other errors here, returning an error if it's not ENODEV. If it is ENODEV, just set phy_cfg_clk to NULL, then you can remove all of the if (IS_ERR(dsi->phy_cfg_clk) checks everywhere since clk_* functions check for NULL. Sean > + > ret = clk_prepare_enable(dsi->pllref_clk); > if (ret) { > dev_err(dev, "%s: Failed to enable pllref_clk\n", __func__); > -- > 2.6.3 > > _______________________________________________ > dri-devel mailing list > dri-devel at lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- Sean Paul, Software Engineer, Google / Chromium OS