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Kristensen" , Kalyan Thota , nganji@codeaurora.org, dri-devel , linux-arm-msm , freedreno , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Linux Kernel Mailing List , Matthias Kaehlcke , linux-arm-msm-owner@vger.kernel.org Subject: Re: [v2] drm/msm: add shutdown support for display platform_driver In-Reply-To: References: <1591009402-681-1-git-send-email-mkrishn@codeaurora.org> Message-ID: <0c3a5b78537c659f49037e3f9d0d8888@codeaurora.org> X-Sender: saiprakash.ranjan@codeaurora.org User-Agent: Roundcube Webmail/1.3.9 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2020-08-18 20:42, Rob Clark wrote: > On Tue, Aug 18, 2020 at 3:03 AM Sai Prakash Ranjan > wrote: >> >> Hi, >> >> On 2020-06-01 16:33, Krishna Manikandan wrote: >> > Define shutdown callback for display drm driver, >> > so as to disable all the CRTCS when shutdown >> > notification is received by the driver. >> > >> > This change will turn off the timing engine so >> > that no display transactions are requested >> > while mmu translations are getting disabled >> > during reboot sequence. >> > >> > Signed-off-by: Krishna Manikandan >> > >> > Changes in v2: >> > - Remove NULL check from msm_pdev_shutdown (Stephen Boyd) >> > - Change commit text to reflect when this issue >> > was uncovered (Sai Prakash Ranjan) >> > --- >> > drivers/gpu/drm/msm/msm_drv.c | 8 ++++++++ >> > 1 file changed, 8 insertions(+) >> > >> > diff --git a/drivers/gpu/drm/msm/msm_drv.c >> > b/drivers/gpu/drm/msm/msm_drv.c >> > index e4b750b..94e3963 100644 >> > --- a/drivers/gpu/drm/msm/msm_drv.c >> > +++ b/drivers/gpu/drm/msm/msm_drv.c >> > @@ -1322,6 +1322,13 @@ static int msm_pdev_remove(struct >> > platform_device *pdev) >> > return 0; >> > } >> > >> > +static void msm_pdev_shutdown(struct platform_device *pdev) >> > +{ >> > + struct drm_device *drm = platform_get_drvdata(pdev); >> > + >> > + drm_atomic_helper_shutdown(drm); >> > +} >> > + >> > static const struct of_device_id dt_match[] = { >> > { .compatible = "qcom,mdp4", .data = (void *)KMS_MDP4 }, >> > { .compatible = "qcom,mdss", .data = (void *)KMS_MDP5 }, >> > @@ -1334,6 +1341,7 @@ static int msm_pdev_remove(struct platform_device >> > *pdev) >> > static struct platform_driver msm_platform_driver = { >> > .probe = msm_pdev_probe, >> > .remove = msm_pdev_remove, >> > + .shutdown = msm_pdev_shutdown, >> > .driver = { >> > .name = "msm", >> > .of_match_table = dt_match, >> >> Any more comments on this patch? > > sorry, I managed to overlook this earlier.. I've pulled it in to > msm-next > No problem, thanks Rob. -Sai -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation