From: Michael Walle Date: Fri, 18 Jun 2021 12:04:33 +0000 (+0200) Subject: drm/etnaviv: add clock gating workaround for GC7000 r6202 X-Git-Tag: microblaze-v5.16~33^2~9^2~1 X-Git-Url: http://git.monstr.eu/?p=linux-2.6-microblaze.git;a=commitdiff_plain;h=432f51e7deedadceaf99a953a6f0a7b30c8155f9 drm/etnaviv: add clock gating workaround for GC7000 r6202 The LS1028A SoC errata sheet mentions A-050121 "GPU hangs if clock gating for Rasterizer, Setup Engine and Texture Engine are enabled". The workaround is to disable the corresponding clock gatings. Signed-off-by: Michael Walle Signed-off-by: Lucas Stach --- diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c index 4102bcea3341..c297fffe06eb 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c @@ -613,6 +613,12 @@ static void etnaviv_gpu_enable_mlcg(struct etnaviv_gpu *gpu) etnaviv_is_model_rev(gpu, GC2000, 0x5108)) pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_TX; + /* Disable SE, RA and TX clock gating on affected core revisions. */ + if (etnaviv_is_model_rev(gpu, GC7000, 0x6202)) + pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_SE | + VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA | + VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_TX; + pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_HZ; pmc |= VIVS_PM_MODULE_CONTROLS_DISABLE_MODULE_CLOCK_GATING_RA_EZ;