There is known issue on GT interrupt delivery with DC6 and firmwares <1.21. There is a suspicion that this causes spurious gpu hangs on driver init and with some workloads, as upgrading the firmware to 1.21 makes these problems disappear. As of now the current version included in distribution firmware packages is very like to be 1.19. Play it safe and refuse to load a firmware version that may affect gpu side stability. With < 1.23 there is a palette and dmc ram corruption issue so blacklist anything below that. v2: Refuse to load fw instead of notifying the user v3: Rebase on header version changes v4: Refuse to load anything less than 1.23 Cc: Animesh Manna <animesh.manna@xxxxxxxxx> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> Cc: Dave Gordon <david.s.gordon@xxxxxxxxx> Cc: Arun Siluvery <arun.siluvery@xxxxxxxxxxxxxxx> Cc: Imre Deak <imre.deak@xxxxxxxxx> Cc: Patrik Jakobsson <patrik.jakobsson@xxxxxxxxxxxxxxx> Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> References: https://01.org/linuxgraphics/downloads/skldmcver121 References: https://01.org/linuxgraphics/downloads/skylake-dmc-1.23 Testcase: igt/gem_exec_nop Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_csr.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_csr.c b/drivers/gpu/drm/i915/intel_csr.c index cabcc51..85261d4 100644 --- a/drivers/gpu/drm/i915/intel_csr.c +++ b/drivers/gpu/drm/i915/intel_csr.c @@ -47,6 +47,9 @@ MODULE_FIRMWARE(I915_CSR_SKL); MODULE_FIRMWARE(I915_CSR_BXT); +#define SKL_REQUIRED_FW_MAJOR 1 +#define SKL_REQUIRED_FW_MINOR 23 + /* * SKL CSR registers for DC5 and DC6 */ @@ -401,6 +404,14 @@ static void finish_csr_load(const struct firmware *fw, void *context) dmc_payload = csr->dmc_payload; memcpy(dmc_payload, &fw->data[readcount], nbytes); + if (IS_SKYLAKE(dev) && + (CSR_VERSION_MAJOR(csr->version) < SKL_REQUIRED_FW_MAJOR || + CSR_VERSION_MINOR(csr->version) < SKL_REQUIRED_FW_MINOR)) { + DRM_INFO("Outdated dmc firmware found, please upgrade to %u.%u or newer\n", + SKL_REQUIRED_FW_MAJOR, SKL_REQUIRED_FW_MINOR); + goto out; + } + /* load csr program during system boot, as needed for DC states */ intel_csr_load_program(dev); fw_loaded = true; -- 2.1.4 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
