On 2014년 11월 06일 22:00, Krzysztof Kozlowski wrote: > On czw, 2014-11-06 at 21:32 +0900, Inki Dae wrote: >> On 2014년 11월 06일 21:11, Krzysztof Kozłowski wrote: >>> On 06.11.2014 11:32, Inki Dae wrote: >>>> This patch resolves temporarily infinite loop issue incurred >>>> when Exynos drm driver is enabled and multi-platform kernel >>>> is used by registering Exynos drm device object only in case >>>> of Exynos SoC. So this patch will be replaced with more generic >>>> way later. >>> >>> Does not help for Rinato board. >>> >>> On Rinato: >>> ----------------------- >>> Failed to find PMU node >>> Registering SWP/SWPB emulation handler >>> mmc0: BKOPS_EN bit is not set >>> mmc_host mmc0: Bus speed (slot 0) = 100000000Hz (slot req 100000000Hz, >>> actual 100000000HZ div = 0) >>> exynos-drm-ipp exynos-drm-ipp: drm ipp registered successfully. >>> mmc0: new HS200 MMC card at address 0001 >>> platform exynos-drm: Driver exynos-drm requests probe deferral >>> mmcblk0: mmc0:0001 F5X5MA 3.64 GiB >>> mmcblk0boot0: mmc0:0001 F5X5MA partition 1 4.00 MiB >>> exynos-drm-ipp exynos-drm-ipp: drm ipp registered successfully. >>> mmcblk0boot1: mmc0:0001 F5X5MA partition 2 4.00 MiB >>> platform exynos-drm: Driver exynos-drm requests probe deferral >>> mmcblk0rpmb: mmc0:0001 F5X5MA partition 3 512 KiB >>> exynos-drm-ipp exynos-drm-ipp: drm ipp registered successfully. >>> platform exynos-drm: Driver exynos-drm requests probe deferral >>> mmcblk0: p1 p2 p3 p4 p5 p6 p7 >>> exynos-drm-ipp exynos-drm-ipp: drm ipp registered successfully. >>> platform exynos-drm: Driver exynos-drm requests probe deferral >>> exynos-drm-ipp exynos-drm-ipp: drm ipp registered successfully. >>> platform exynos-drm: Driver exynos-drm requests probe deferral >>> >>> and so on... >>> ----------------------- >> >> Can you show me compatible string placed on top of exynos3250-rinato.dts >> file? If the compatible has "samsung,exynos3" it should be no problem >> with this patch. And the rinato dts file we posted to mainline has the >> compatible string. > > model = "Samsung Rinato board"; > compatible = "samsung,rinato-rev05", "samsung,exynos3250", > "samsung,exynos3"; > > The problem is "samsung,exynos3" because the patch solves only issue on > multiplatform kernel run on non-exynos board. It does not solve the > problem on exynos board with DRM enabled but without all drivers. > Right, if you disabled all kms drivers and enabled only non-kms drivers then the infinite loop will occur. However, this should be handled in separated issue because without this patch, same issue will occur. > >>> >>> I do not know whether it is related but Trats2 board cannot boot due to >>> lockup after: >>> [drm] Initialized drm 1.1.0 20060810 >>> (with or without the patch) >>> https://lkml.org/lkml/2014/11/6/125 >>> >> >> hmm... it's strange because my trats2 board works well with this patch. >> Which kernel did you test? And how can I reproduce above lockup? > > Just boot up next-2014110{456} with kernel config attached in mentioned > email. It looks like other issue regardless of this patch. If the board dts file includes compatible string that Exynos drm driver is checking then Exynos drm driver has no any change - having same logic. Thanks, Inki Dae > > Best regards, > Krzysztof > > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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