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... -----------------------
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
Best regards, Krzysztof
Signed-off-by: Inki Dae inki.dae@samsung.com
drivers/gpu/drm/exynos/exynos_drm_drv.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c index 443a206..ecc86aa 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_drv.c +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c @@ -734,6 +734,18 @@ static int exynos_drm_init(void) { int ret;
- /*
* Register device object only in case of Exynos SoC.** Below codes resolves temporarily infinite loop issue incurred* by Exynos drm driver when using multi-platform kernel.* So these codes will be replaced with more generic way later.*/- if (!of_machine_is_compatible("samsung,exynos3") &&
!of_machine_is_compatible("samsung,exynos4") &&!of_machine_is_compatible("samsung,exynos5"))return -ENODEV;- exynos_drm_pdev = platform_device_register_simple("exynos-drm", -1, NULL, 0); if (IS_ERR(exynos_drm_pdev))