diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.10/950-0347-drm-vc4-Add-debugfs-node-that-dumps-the-current-disp.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.10/950-0347-drm-vc4-Add-debugfs-node-that-dumps-the-current-disp.patch | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.10/950-0347-drm-vc4-Add-debugfs-node-that-dumps-the-current-disp.patch b/target/linux/bcm27xx/patches-5.10/950-0347-drm-vc4-Add-debugfs-node-that-dumps-the-current-disp.patch new file mode 100644 index 0000000000..1e38c54492 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.10/950-0347-drm-vc4-Add-debugfs-node-that-dumps-the-current-disp.patch @@ -0,0 +1,70 @@ +From 09157702811f9e2144a769aef1f2269306fe86bb Mon Sep 17 00:00:00 2001 +From: Dave Stevenson <dave.stevenson@raspberrypi.com> +Date: Tue, 6 Oct 2020 18:44:42 +0100 +Subject: [PATCH] drm/vc4: Add debugfs node that dumps the current + display lists + +This allows easy analysis of display lists when debugging. + +Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> +--- + drivers/gpu/drm/vc4/vc4_hvs.c | 41 +++++++++++++++++++++++++++++++++++ + 1 file changed, 41 insertions(+) + +--- a/drivers/gpu/drm/vc4/vc4_hvs.c ++++ b/drivers/gpu/drm/vc4/vc4_hvs.c +@@ -95,6 +95,45 @@ static int vc4_hvs_debugfs_underrun(stru + 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 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. + */ +@@ -671,6 +710,8 @@ static int vc4_hvs_bind(struct device *d + 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; + } |