diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0552-drm-vc4-Add-debugfs-node-that-dumps-the-vc5-gamma-PW.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.15/950-0552-drm-vc4-Add-debugfs-node-that-dumps-the-vc5-gamma-PW.patch | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0552-drm-vc4-Add-debugfs-node-that-dumps-the-vc5-gamma-PW.patch b/target/linux/bcm27xx/patches-5.15/950-0552-drm-vc4-Add-debugfs-node-that-dumps-the-vc5-gamma-PW.patch new file mode 100644 index 0000000000..700b68dc9d --- /dev/null +++ b/target/linux/bcm27xx/patches-5.15/950-0552-drm-vc4-Add-debugfs-node-that-dumps-the-vc5-gamma-PW.patch @@ -0,0 +1,114 @@ +From db56206e77d1a71c145669dc41d0ada496ea8e4f Mon Sep 17 00:00:00 2001 +From: Dave Stevenson <dave.stevenson@raspberrypi.com> +Date: Wed, 28 Apr 2021 12:32:10 +0200 +Subject: [PATCH] drm/vc4: Add debugfs node that dumps the vc5 gamma + PWL entries + +This helps with debugging the conversion from a 256 point gamma LUT to +16 point PWL entries as used by the BCM2711. + +Co-developed-by: Juerg Haefliger <juergh@canonical.com> +Signed-off-by: Juerg Haefliger <juergh@canonical.com> +Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> +Signed-off-by: Maxime Ripard <maxime@cerno.tech> +--- + drivers/gpu/drm/vc4/vc4_hvs.c | 81 +++++++++++++++++++++++++++++++++++ + 1 file changed, 81 insertions(+) + +--- a/drivers/gpu/drm/vc4/vc4_hvs.c ++++ b/drivers/gpu/drm/vc4/vc4_hvs.c +@@ -134,6 +134,84 @@ static int vc4_hvs_debugfs_dlist(struct + return 0; + } + ++static int vc5_hvs_debugfs_gamma(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 i, chan; ++ u32 dispstat, dispbkgndx; ++ ++ for (chan = 0; chan < SCALER_CHANNELS_COUNT; chan++) { ++ u32 x_c, grad; ++ u32 offset = SCALER5_DSPGAMMA_START + ++ chan * SCALER5_DSPGAMMA_CHAN_OFFSET; ++ ++ dispstat = VC4_GET_FIELD(HVS_READ(SCALER_DISPSTATX(chan)), ++ SCALER_DISPSTATX_MODE); ++ if (dispstat == SCALER_DISPSTATX_MODE_DISABLED || ++ dispstat == SCALER_DISPSTATX_MODE_EOF) { ++ drm_printf(&p, "HVS channel %u: Channel disabled\n", chan); ++ continue; ++ } ++ ++ dispbkgndx = HVS_READ(SCALER_DISPBKGNDX(chan)); ++ if (!(dispbkgndx & SCALER_DISPBKGND_GAMMA)) { ++ drm_printf(&p, "HVS channel %u: Gamma disabled\n", chan); ++ continue; ++ } ++ ++ drm_printf(&p, "HVS channel %u:\n", chan); ++ drm_printf(&p, " red:\n"); ++ for (i = 0; i < SCALER5_DSPGAMMA_NUM_POINTS; i++, offset += 8) { ++ x_c = HVS_READ(offset); ++ grad = HVS_READ(offset + 4); ++ drm_printf(&p, " %08x %08x - x %u, c %u, grad %u\n", ++ x_c, grad, ++ VC4_GET_FIELD(x_c, SCALER5_DSPGAMMA_OFF_X), ++ VC4_GET_FIELD(x_c, SCALER5_DSPGAMMA_OFF_C), ++ grad); ++ } ++ drm_printf(&p, " green:\n"); ++ for (i = 0; i < SCALER5_DSPGAMMA_NUM_POINTS; i++, offset += 8) { ++ x_c = HVS_READ(offset); ++ grad = HVS_READ(offset + 4); ++ drm_printf(&p, " %08x %08x - x %u, c %u, grad %u\n", ++ x_c, grad, ++ VC4_GET_FIELD(x_c, SCALER5_DSPGAMMA_OFF_X), ++ VC4_GET_FIELD(x_c, SCALER5_DSPGAMMA_OFF_C), ++ grad); ++ } ++ drm_printf(&p, " blue:\n"); ++ for (i = 0; i < SCALER5_DSPGAMMA_NUM_POINTS; i++, offset += 8) { ++ x_c = HVS_READ(offset); ++ grad = HVS_READ(offset + 4); ++ drm_printf(&p, " %08x %08x - x %u, c %u, grad %u\n", ++ x_c, grad, ++ VC4_GET_FIELD(x_c, SCALER5_DSPGAMMA_OFF_X), ++ VC4_GET_FIELD(x_c, SCALER5_DSPGAMMA_OFF_C), ++ grad); ++ } ++ ++ /* Alpha only valid on channel 2 */ ++ if (chan != 2) ++ continue; ++ ++ drm_printf(&p, " alpha:\n"); ++ for (i = 0; i < SCALER5_DSPGAMMA_NUM_POINTS; i++, offset += 8) { ++ x_c = HVS_READ(offset); ++ grad = HVS_READ(offset + 4); ++ drm_printf(&p, " %08x %08x - x %u, c %u, grad %u\n", ++ x_c, grad, ++ VC4_GET_FIELD(x_c, SCALER5_DSPGAMMA_OFF_X), ++ VC4_GET_FIELD(x_c, SCALER5_DSPGAMMA_OFF_C), ++ grad); ++ } ++ } ++ return 0; ++} ++ + /* The filter kernel is composed of dwords each containing 3 9-bit + * signed integers packed next to each other. + */ +@@ -809,6 +887,9 @@ static int vc4_hvs_bind(struct device *d + NULL); + vc4_debugfs_add_file(drm, "hvs_dlists", vc4_hvs_debugfs_dlist, + NULL); ++ if (hvs->hvs5) ++ vc4_debugfs_add_file(drm, "hvs_gamma", vc5_hvs_debugfs_gamma, ++ NULL); + + return 0; + } |