From: Dave Stevenson dave.stevenson@raspberrypi.com
This allows easy analysis of display lists when debugging.
Signed-off-by: Dave Stevenson dave.stevenson@raspberrypi.com Signed-off-by: Maxime Ripard maxime@cerno.tech --- drivers/gpu/drm/vc4/vc4_hvs.c | 42 +++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+)
diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c index 2a58fc421cf6..5fdfc01fbc5a 100644 --- a/drivers/gpu/drm/vc4/vc4_hvs.c +++ b/drivers/gpu/drm/vc4/vc4_hvs.c @@ -94,6 +94,46 @@ static int vc4_hvs_debugfs_underrun(struct seq_file *m, void *data) return 0; }
+static int vc4_hvs_debugfs_dlist(struct seq_file *m, void *data) +{ + struct drm_info_node *node = m->private; + struct drm_device *dev = node->minor->dev; + struct vc4_dev *vc4 = to_vc4_dev(dev); + struct vc4_hvs *hvs = vc4->hvs; + struct drm_printer p = drm_seq_file_printer(m); + unsigned int next_entry_start = 0; + unsigned int i, j; + u32 dlist_word, dispstat; + + for (i = 0; i < SCALER_CHANNELS_COUNT; i++) { + dispstat = VC4_GET_FIELD(HVS_READ(SCALER_DISPSTATX(i)), + SCALER_DISPSTATX_MODE); + if (dispstat == SCALER_DISPSTATX_MODE_DISABLED || + dispstat == SCALER_DISPSTATX_MODE_EOF) { + drm_printf(&p, "HVS chan %u disabled\n", i); + continue; + } + + drm_printf(&p, "HVS chan %u:\n", i); + + for (j = HVS_READ(SCALER_DISPLISTX(i)); j < 256; j++) { + dlist_word = readl((u32 __iomem *)vc4->hvs->dlist + j); + drm_printf(&p, "dlist: %02d: 0x%08x\n", j, + dlist_word); + if (!next_entry_start || + next_entry_start == j) { + if (dlist_word & SCALER_CTL0_END) + break; + next_entry_start = j + + VC4_GET_FIELD(dlist_word, + SCALER_CTL0_SIZE); + } + } + } + + return 0; +} + /* The filter kernel is composed of dwords each containing 3 9-bit * signed integers packed next to each other. */ @@ -734,6 +774,8 @@ static int vc4_hvs_bind(struct device *dev, struct device *master, void *data) vc4_debugfs_add_regset32(drm, "hvs_regs", &hvs->regset); vc4_debugfs_add_file(drm, "hvs_underrun", vc4_hvs_debugfs_underrun, NULL); + vc4_debugfs_add_file(drm, "hvs_dlists", vc4_hvs_debugfs_dlist, + NULL);
return 0; }