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drm/vc4: Make sure that the v3d ident debugfs has vc4's power on.

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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>
This commit is contained in:
Eric Anholt 2019-02-20 13:03:43 -08:00
parent cb74f6ee8e
commit 6234fc0fb0
1 changed files with 16 additions and 11 deletions
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27
drivers/gpu/drm/vc4/vc4_v3d.c
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@ -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);
int ret = vc4_v3d_pm_get(vc4);
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));
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;
}