From: Monk Liu Date: Fri, 11 Nov 2016 03:24:29 +0000 (+0800) Subject: drm/amdgpu:fix vpost_needed routine X-Git-Tag: v5.15~12429^2~3^2~3 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1da2c326e43b0834105993d13610647337bbad67;p=platform%2Fkernel%2Flinux-starfive.git drm/amdgpu:fix vpost_needed routine 1,cleanup description/comments 2,for FIJI & passthrough, force post when smc fw version below 22.15 3,for other cases, follow regular rules Signed-off-by: Monk Liu Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 7ca07e7..3161d77 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -658,12 +658,10 @@ static bool amdgpu_vpost_needed(struct amdgpu_device *adev) return false; if (amdgpu_passthrough(adev)) { - /* for FIJI: In whole GPU pass-through virtualization case - * old smc fw won't clear some registers (e.g. MEM_SIZE, BIOS_SCRATCH) - * so amdgpu_card_posted return false and driver will incorrectly skip vPost. - * but if we force vPost do in pass-through case, the driver reload will hang. - * whether doing vPost depends on amdgpu_card_posted if smc version is above - * 00160e00 for FIJI. + /* for FIJI: In whole GPU pass-through virtualization case, after VM reboot + * some old smc fw still need driver do vPost otherwise gpu hang, while + * those smc fw version above 22.15 doesn't have this flaw, so we force + * vpost executed for smc version below 22.15 */ if (adev->asic_type == CHIP_FIJI) { int err; @@ -674,22 +672,11 @@ static bool amdgpu_vpost_needed(struct amdgpu_device *adev) return true; fw_ver = *((uint32_t *)adev->pm.fw->data + 69); - if (fw_ver >= 0x00160e00) - return !amdgpu_card_posted(adev); + if (fw_ver < 0x00160e00) + return true; } - } else { - /* in bare-metal case, amdgpu_card_posted return false - * after system reboot/boot, and return true if driver - * reloaded. - * we shouldn't do vPost after driver reload otherwise GPU - * could hang. - */ - if (amdgpu_card_posted(adev)) - return false; } - - /* we assume vPost is neede for all other cases */ - return true; + return !amdgpu_card_posted(adev); } /**