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| author | Eric Anholt <eric@anholt.net> | 2019-02-20 13:03:43 -0800 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2019-04-01 10:44:34 -0700 |
| commit | 6234fc0fb03743536eefba47c08ff8d4c9cf2fae (patch) | |
| tree | a68e7e78f02354a9330cb383210f0ebc29571cba /drivers/gpu/drm/vc4 | |
| parent | cb74f6ee8e3a00e85d53697d5d84ec21d416e5ef (diff) | |
| download | linux-6234fc0fb03743536eefba47c08ff8d4c9cf2fae.tar.gz linux-6234fc0fb03743536eefba47c08ff8d4c9cf2fae.tar.bz2 linux-6234fc0fb03743536eefba47c08ff8d4c9cf2fae.zip | |
drm/vc4: Make sure that the v3d ident debugfs has vc4's power on.
Otherwise, you sometimes decode the ident fields based on 0xdeadbeef
register reads.
Signed-off-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20190220210343.28157-7-eric@anholt.net
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Diffstat (limited to 'drivers/gpu/drm/vc4')
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_v3d.c | 29 |
1 files changed, 17 insertions, 12 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_v3d.c b/drivers/gpu/drm/vc4/vc4_v3d.c index b2b974f20e23..27c70eb52405 100644 --- a/drivers/gpu/drm/vc4/vc4_v3d.c +++ b/drivers/gpu/drm/vc4/vc4_v3d.c @@ -121,18 +121,23 @@ int vc4_v3d_debugfs_ident(struct seq_file *m, void *unused) struct drm_info_node *node = (struct drm_info_node *)m->private; struct drm_device *dev = node->minor->dev; struct vc4_dev *vc4 = to_vc4_dev(dev); - uint32_t ident1 = V3D_READ(V3D_IDENT1); - uint32_t nslc = VC4_GET_FIELD(ident1, V3D_IDENT1_NSLC); - uint32_t tups = VC4_GET_FIELD(ident1, V3D_IDENT1_TUPS); - uint32_t qups = VC4_GET_FIELD(ident1, V3D_IDENT1_QUPS); - - seq_printf(m, "Revision: %d\n", - VC4_GET_FIELD(ident1, V3D_IDENT1_REV)); - seq_printf(m, "Slices: %d\n", nslc); - seq_printf(m, "TMUs: %d\n", nslc * tups); - seq_printf(m, "QPUs: %d\n", nslc * qups); - seq_printf(m, "Semaphores: %d\n", - VC4_GET_FIELD(ident1, V3D_IDENT1_NSEM)); + int ret = vc4_v3d_pm_get(vc4); + + if (ret == 0) { + uint32_t ident1 = V3D_READ(V3D_IDENT1); + uint32_t nslc = VC4_GET_FIELD(ident1, V3D_IDENT1_NSLC); + uint32_t tups = VC4_GET_FIELD(ident1, V3D_IDENT1_TUPS); + uint32_t qups = VC4_GET_FIELD(ident1, V3D_IDENT1_QUPS); + + seq_printf(m, "Revision: %d\n", + VC4_GET_FIELD(ident1, V3D_IDENT1_REV)); + seq_printf(m, "Slices: %d\n", nslc); + seq_printf(m, "TMUs: %d\n", nslc * tups); + seq_printf(m, "QPUs: %d\n", nslc * qups); + seq_printf(m, "Semaphores: %d\n", + VC4_GET_FIELD(ident1, V3D_IDENT1_NSEM)); + vc4_v3d_pm_put(vc4); + } return 0; } |