From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jagan Teki Subject: Re: [PATCH v2 04/15] drm/sun4i: sun6i_mipi_dsi: Add Allwinner A64 MIPI DSI support Date: Thu, 25 Oct 2018 16:32:06 +0530 Message-ID: References: <20181023155035.9101-1-jagan@amarulasolutions.com> <20181023155035.9101-5-jagan@amarulasolutions.com> <20181024180632.zrb3lrqsznspmwbk@flea> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Return-path: In-Reply-To: <20181024180632.zrb3lrqsznspmwbk@flea> Sender: linux-kernel-owner@vger.kernel.org To: Maxime Ripard Cc: Chen-Yu Tsai , Icenowy Zheng , Jernej Skrabec , Vasily Khoruzhick , Rob Herring , Mark Rutland , Catalin Marinas , Will Deacon , David Airlie , dri-devel , Michael Turquette , Stephen Boyd , linux-clk , Michael Trimarchi , linux-arm-kernel , devicetree , linux-kernel , linux-sunxi@googlegroups.com List-Id: dri-devel@lists.freedesktop.org On Wed, Oct 24, 2018 at 11:36 PM Maxime Ripard wrote: > > On Tue, Oct 23, 2018 at 09:20:24PM +0530, Jagan Teki wrote: > > The MIPI DSI controller on Allwinner A64 is similar to > > Allwinner A31 without support of DSI mod clock(CLK_DSI_SCLK) > > > > So, alter has_mod_clk bool via driver data for respective > > SoC's compatible. > > > > Signed-off-by: Jagan Teki > > --- > > Changes for v2: > > - none > > > > drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 47 ++++++++++++++++++++------ > > drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h | 5 +++ > > 2 files changed, 41 insertions(+), 11 deletions(-) > > > > diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c > > index e3b34a345546..8e9c76febca2 100644 > > --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c > > +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c > > @@ -10,6 +10,7 @@ > > #include > > #include > > #include > > +#include > > #include > > #include > > #include > > @@ -981,6 +982,8 @@ static int sun6i_dsi_probe(struct platform_device *pdev) > > dsi->host.ops = &sun6i_dsi_host_ops; > > dsi->host.dev = dev; > > > > + dsi->variant = of_device_get_match_data(dev); > > + > > res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > > base = devm_ioremap_resource(dev, res); > > if (IS_ERR(base)) { > > @@ -1001,17 +1004,20 @@ static int sun6i_dsi_probe(struct platform_device *pdev) > > return PTR_ERR(dsi->reset); > > } > > > > - dsi->mod_clk = devm_clk_get(dev, "mod"); > > - if (IS_ERR(dsi->mod_clk)) { > > - dev_err(dev, "Couldn't get the DSI mod clock\n"); > > - return PTR_ERR(dsi->mod_clk); > > + if (dsi->variant->has_mod_clk) { > > + dsi->mod_clk = devm_clk_get(dev, "mod"); > > + if (IS_ERR(dsi->mod_clk)) { > > + dev_err(dev, "Couldn't get the DSI mod clock\n"); > > + return PTR_ERR(dsi->mod_clk); > > + } > > } > > > > /* > > * In order to operate properly, that clock seems to be always > > * set to 297MHz. > > */ > > - clk_set_rate_exclusive(dsi->mod_clk, 297000000); > > + if (dsi->variant->has_mod_clk) > > + clk_set_rate_exclusive(dsi->mod_clk, 297000000); > > > > dphy_node = of_parse_phandle(dev->of_node, "phys", 0); > > ret = sun6i_dphy_probe(dsi, dphy_node); > > @@ -1043,7 +1049,8 @@ static int sun6i_dsi_probe(struct platform_device *pdev) > > pm_runtime_disable(dev); > > sun6i_dphy_remove(dsi); > > err_unprotect_clk: > > - clk_rate_exclusive_put(dsi->mod_clk); > > + if (dsi->variant->has_mod_clk) > > + clk_rate_exclusive_put(dsi->mod_clk); > > return ret; > > } > > > > @@ -1056,7 +1063,8 @@ static int sun6i_dsi_remove(struct platform_device *pdev) > > mipi_dsi_host_unregister(&dsi->host); > > pm_runtime_disable(dev); > > sun6i_dphy_remove(dsi); > > - clk_rate_exclusive_put(dsi->mod_clk); > > + if (dsi->variant->has_mod_clk) > > + clk_rate_exclusive_put(dsi->mod_clk); > > > > return 0; > > } > > @@ -1066,7 +1074,8 @@ static int __maybe_unused sun6i_dsi_runtime_resume(struct device *dev) > > struct sun6i_dsi *dsi = dev_get_drvdata(dev); > > > > reset_control_deassert(dsi->reset); > > - clk_prepare_enable(dsi->mod_clk); > > + if (dsi->variant->has_mod_clk) > > + clk_prepare_enable(dsi->mod_clk); > > > > /* > > * Enable the DSI block. > > @@ -1094,7 +1103,8 @@ static int __maybe_unused sun6i_dsi_runtime_suspend(struct device *dev) > > { > > struct sun6i_dsi *dsi = dev_get_drvdata(dev); > > > > - clk_disable_unprepare(dsi->mod_clk); > > + if (dsi->variant->has_mod_clk) > > + clk_disable_unprepare(dsi->mod_clk); > > reset_control_assert(dsi->reset); > > > > return 0; > > @@ -1106,9 +1116,24 @@ static const struct dev_pm_ops sun6i_dsi_pm_ops = { > > NULL) > > }; > > > > +static const struct sun6i_dsi_variant sun6i_a31_dsi = { > > + .has_mod_clk = true, > > +}; > > + > > +static const struct sun6i_dsi_variant sun50i_a64_dsi = { > > + .has_mod_clk = false, > > This is the default already. True but we need to assign the .data. how about checking device compatible? I'm thinking of difference in driver data in future between SoC's > > > +}; > > + > > static const struct of_device_id sun6i_dsi_of_table[] = { > > - { .compatible = "allwinner,sun6i-a31-mipi-dsi" }, > > - { } > > + { > > + .compatible = "allwinner,sun6i-a31-mipi-dsi", > > + .data = &sun6i_a31_dsi, > > + }, > > + { > > + .compatible = "allwinner,sun50i-a64-mipi-dsi", > > + .data = &sun50i_a64_dsi, > > + }, > > + { /* sentinel */ } > > }; > > MODULE_DEVICE_TABLE(of, sun6i_dsi_of_table); > > > > diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h > > index dbbc5b3ecbda..597b62227019 100644 > > --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h > > +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.h > > @@ -20,6 +20,10 @@ struct sun6i_dphy { > > struct reset_control *reset; > > }; > > > > +struct sun6i_dsi_variant { > > + bool has_mod_clk; > > +}; > > + > > This should be part of a separate patch. How come, because has_mod_clk is using in driver file?