drm/amdgpu/mes11: optimize MES pipe FW version fetching

commit b71a2bb0ce07f40f92f59ed7f283068e41b10075 upstream.

Don't fetch it again if we already have it.  It seems the
registers don't reliably have the value at resume in some
cases.

Fixes: 028c3fb37e70 ("drm/amdgpu/mes11: initiate mes v11 support")
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4083
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
index 231a3d490ea8e3c4eb4ea998d2d7673a200700e7..7a773fcd7752c2c5b800a195243cc1ed5c0fdb39 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mes_v11_0.c
@@ -859,6 +859,10 @@ static void mes_v11_0_get_fw_version(struct amdgpu_device *adev)
 {
        int pipe;
 
+       /* return early if we have already fetched these */
+       if (adev->mes.sched_version && adev->mes.kiq_version)
+               return;
+
        /* get MES scheduler/KIQ versions */
        mutex_lock(&adev->srbm_mutex);