From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751850AbdLAKI2 (ORCPT ); Fri, 1 Dec 2017 05:08:28 -0500 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:39537 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750994AbdLAKIZ (ORCPT ); Fri, 1 Dec 2017 05:08:25 -0500 From: Philippe CORNU To: Nickey Yang , "robh+dt@kernel.org" , "heiko@sntech.de" , "mark.rutland@arm.com" , "airlied@linux.ie" CC: "linux-kernel@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , "linux-rockchip@lists.infradead.org" , "laurent.pinchart@ideasonboard.com" , "seanpaul@chromium.org" , "briannorris@chromium.org" , "mka@chromium.org" , "hoegsberg@gmail.com" , "architt@codeaurora.org" , Yannick FERTRE , "hl@rock-chips.com" , "zyw@rock-chips.com" , "xbl@rock-chips.com" Subject: Re: [PATCH v4 1/3] drm/bridge/synopsys: dsi: stop clobbering drvdata Thread-Topic: [PATCH v4 1/3] drm/bridge/synopsys: dsi: stop clobbering drvdata Thread-Index: AQHTalijU8fvlnmiYUu6USdJqTz+LaMuGHKAgAAK1gCAAA+zgA== Date: Fri, 1 Dec 2017 10:07:40 +0000 Message-ID: <1700743e-04b0-90ea-d393-dbfebf93742f@st.com> References: <1512100685-4015-1-git-send-email-nickey.yang@rock-chips.com> <1512100685-4015-2-git-send-email-nickey.yang@rock-chips.com> <5605c3c2-56ad-2289-c3c0-78cde1152123@st.com> In-Reply-To: Accept-Language: fr-FR, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.75.127.44] Content-Type: text/plain; charset="utf-8" Content-ID: <2144B06C4495034C88D0A6544270BB68@st.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-12-01_02:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by nfs id vB1A94ve004954 Hi Nickey, On 12/01/2017 10:11 AM, Nickey Yang wrote: > Hi Philippe, > > > On 2017年12月01日 16:32, Philippe CORNU wrote: >> Dear Nickey, >> >> Many thanks for your patch. >> >> I am sorry to say that but you can not add my "Acked-by" to this patch >> because this code is different from the "original" one from Brian (which >> got my "Acked-by"). > I'm sorry I didn't think much about it, Thank you for correcting me. >> Sometimes it is not an issue because differences are not important but >> in this particular case, the code is really different: you have remove >> platform_set_drvdata() & platform_get_drvdata() in the stm part. >> >> Could you please go back to the original code or propose me an updated >> version of this code. > Could you help update new version of this code(stm part) and then test on > stm platform? I think you can simply goes back to the original version from Brian (see the discussion thread in https://patchwork.kernel.org/patch/10078493/) unless you have specific/good reasons for modifying the code as you did. Many thanks, Philippe :) > > Thanks, > Nickey. >> >> Many thanks, >> >> Philippe :-) >> >> >> On 12/01/2017 04:58 AM, Nickey Yang wrote: >>> From: Brian Norris >>> >>> Bridge drivers/helpers shouldn't be clobbering the drvdata, since a >>> parent driver might need to own this. Instead, let's return our >>> 'dw_mipi_dsi' object and have callers pass that back to us for removal. >>> >>> Signed-off-by: Brian Norris >>> Signed-off-by: Nickey Yang >>> Reviewed-by: Matthias Kaehlcke >>> Reviewed-by: Archit Taneja >>> Acked-by: Philippe Cornu >>> Link:https://patchwork.kernel.org/patch/10078493/ >>> >>> --- >>> Changes in v4: >>> - Add From tag,update subject line >>> - keep patch "drm/stm: dsi: Adjust dw_mipi_dsi_probe and remove" >>> in this piece together. >>> >>> drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 36 ++++++++++----------------- >>> drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 8 +++--- >>> include/drm/bridge/dw_mipi_dsi.h | 17 ++++++++----- >>> 3 files changed, 29 insertions(+), 32 deletions(-) >>> >>> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c >>> index d9cca4f..c39c7dc 100644 >>> --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c >>> +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c >>> @@ -922,8 +922,6 @@ static int dw_mipi_dsi_bridge_attach(struct drm_bridge *bridge) >>> dsi->bridge.of_node = pdev->dev.of_node; >>> #endif >>> >>> - dev_set_drvdata(dev, dsi); >>> - >>> return dsi; >>> } >>> >>> @@ -935,23 +933,16 @@ static void __dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi) >>> /* >>> * Probe/remove API, used from platforms based on the DRM bridge API. >>> */ >>> -int dw_mipi_dsi_probe(struct platform_device *pdev, >>> - const struct dw_mipi_dsi_plat_data *plat_data) >>> +struct dw_mipi_dsi * >>> +dw_mipi_dsi_probe(struct platform_device *pdev, >>> + const struct dw_mipi_dsi_plat_data *plat_data) >>> { >>> - struct dw_mipi_dsi *dsi; >>> - >>> - dsi = __dw_mipi_dsi_probe(pdev, plat_data); >>> - if (IS_ERR(dsi)) >>> - return PTR_ERR(dsi); >>> - >>> - return 0; >>> + return __dw_mipi_dsi_probe(pdev, plat_data); >>> } >>> EXPORT_SYMBOL_GPL(dw_mipi_dsi_probe); >>> >>> -void dw_mipi_dsi_remove(struct platform_device *pdev) >>> +void dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi) >>> { >>> - struct dw_mipi_dsi *dsi = platform_get_drvdata(pdev); >>> - >>> mipi_dsi_host_unregister(&dsi->dsi_host); >>> >>> __dw_mipi_dsi_remove(dsi); >>> @@ -961,31 +952,30 @@ void dw_mipi_dsi_remove(struct platform_device *pdev) >>> /* >>> * Bind/unbind API, used from platforms based on the component framework. >>> */ >>> -int dw_mipi_dsi_bind(struct platform_device *pdev, struct drm_encoder *encoder, >>> - const struct dw_mipi_dsi_plat_data *plat_data) >>> +struct dw_mipi_dsi * >>> +dw_mipi_dsi_bind(struct platform_device *pdev, struct drm_encoder *encoder, >>> + const struct dw_mipi_dsi_plat_data *plat_data) >>> { >>> struct dw_mipi_dsi *dsi; >>> int ret; >>> >>> dsi = __dw_mipi_dsi_probe(pdev, plat_data); >>> if (IS_ERR(dsi)) >>> - return PTR_ERR(dsi); >>> + return dsi; >>> >>> ret = drm_bridge_attach(encoder, &dsi->bridge, NULL); >>> if (ret) { >>> - dw_mipi_dsi_remove(pdev); >>> + dw_mipi_dsi_remove(dsi); >>> DRM_ERROR("Failed to initialize bridge with drm\n"); >>> - return ret; >>> + return ERR_PTR(ret); >>> } >>> >>> - return 0; >>> + return dsi; >>> } >>> EXPORT_SYMBOL_GPL(dw_mipi_dsi_bind); >>> >>> -void dw_mipi_dsi_unbind(struct device *dev) >>> +void dw_mipi_dsi_unbind(struct dw_mipi_dsi *dsi) >>> { >>> - struct dw_mipi_dsi *dsi = dev_get_drvdata(dev); >>> - >>> __dw_mipi_dsi_remove(dsi); >>> } >>> EXPORT_SYMBOL_GPL(dw_mipi_dsi_unbind); >>> diff --git a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c >>> index e5b6310..80f9950 100644 >>> --- a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c >>> +++ b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c >>> @@ -66,6 +66,7 @@ enum dsi_color { >>> struct dw_mipi_dsi_stm { >>> void __iomem *base; >>> struct clk *pllref_clk; >>> + struct dw_mipi_dsi *dmd; >>> }; >>> >>> static inline void dsi_write(struct dw_mipi_dsi_stm *dsi, u32 reg, u32 val) >>> @@ -318,10 +319,11 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev) >>> dw_mipi_dsi_stm_plat_data.base = dsi->base; >>> dw_mipi_dsi_stm_plat_data.priv_data = dsi; >>> >>> - ret = dw_mipi_dsi_probe(pdev, &dw_mipi_dsi_stm_plat_data); >>> - if (ret) { >>> + dsi->dmd = dw_mipi_dsi_probe(pdev, &dw_mipi_dsi_stm_plat_data); >>> + if (IS_ERR(dsi->dmd)) { >>> DRM_ERROR("Failed to initialize mipi dsi host\n"); >>> clk_disable_unprepare(dsi->pllref_clk); >>> + return PTR_ERR(dsi->dmd); >>> } >>> >>> return ret; >>> @@ -332,7 +334,7 @@ static int dw_mipi_dsi_stm_remove(struct platform_device *pdev) >>> struct dw_mipi_dsi_stm *dsi = dw_mipi_dsi_stm_plat_data.priv_data; >>> >>> clk_disable_unprepare(dsi->pllref_clk); >>> - dw_mipi_dsi_remove(pdev); >>> + dw_mipi_dsi_remove(dsi->dmd); >>> >>> return 0; >>> } >>> diff --git a/include/drm/bridge/dw_mipi_dsi.h b/include/drm/bridge/dw_mipi_dsi.h >>> index 9b30fec..d9c6d54 100644 >>> --- a/include/drm/bridge/dw_mipi_dsi.h >>> +++ b/include/drm/bridge/dw_mipi_dsi.h >>> @@ -10,6 +10,8 @@ >>> #ifndef __DW_MIPI_DSI__ >>> #define __DW_MIPI_DSI__ >>> >>> +struct dw_mipi_dsi; >>> + >>> struct dw_mipi_dsi_phy_ops { >>> int (*init)(void *priv_data); >>> int (*get_lane_mbps)(void *priv_data, struct drm_display_mode *mode, >>> @@ -29,11 +31,14 @@ struct dw_mipi_dsi_plat_data { >>> void *priv_data; >>> }; >>> >>> -int dw_mipi_dsi_probe(struct platform_device *pdev, >>> - const struct dw_mipi_dsi_plat_data *plat_data); >>> -void dw_mipi_dsi_remove(struct platform_device *pdev); >>> -int dw_mipi_dsi_bind(struct platform_device *pdev, struct drm_encoder *encoder, >>> - const struct dw_mipi_dsi_plat_data *plat_data); >>> -void dw_mipi_dsi_unbind(struct device *dev); >>> +struct dw_mipi_dsi *dw_mipi_dsi_probe(struct platform_device *pdev, >>> + const struct dw_mipi_dsi_plat_data >>> + *plat_data); >>> +void dw_mipi_dsi_remove(struct dw_mipi_dsi *dsi); >>> +struct dw_mipi_dsi *dw_mipi_dsi_bind(struct platform_device *pdev, >>> + struct drm_encoder *encoder, >>> + const struct dw_mipi_dsi_plat_data >>> + *plat_data); >>> +void dw_mipi_dsi_unbind(struct dw_mipi_dsi *dsi); >>> >>> #endif /* __DW_MIPI_DSI__ */ >