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127 lines
4.1 KiB
Diff
127 lines
4.1 KiB
Diff
From b2031f4311ac4cee4a089e6a919f2703c4e36887 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Wed, 28 Apr 2021 12:32:10 +0200
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Subject: [PATCH 013/726] drm/vc4: Add debugfs node that dumps the vc5 gamma
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PWL entries
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This helps with debugging the conversion from a 256 point gamma LUT to
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16 point PWL entries as used by the BCM2711.
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Co-developed-by: Juerg Haefliger <juergh@canonical.com>
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Signed-off-by: Juerg Haefliger <juergh@canonical.com>
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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---
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drivers/gpu/drm/vc4/vc4_hvs.c | 85 ++++++++++++++++++++++++++++++++++-
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1 file changed, 84 insertions(+), 1 deletion(-)
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diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c
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index 303f1341db46..5374502bce37 100644
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--- a/drivers/gpu/drm/vc4/vc4_hvs.c
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+++ b/drivers/gpu/drm/vc4/vc4_hvs.c
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@@ -141,6 +141,85 @@ static int vc4_hvs_debugfs_dlist(struct seq_file *m, void *data)
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return 0;
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}
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+static int vc5_hvs_debugfs_gamma(struct seq_file *m, void *data)
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+{
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+ struct drm_info_node *node = m->private;
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+ struct drm_device *dev = node->minor->dev;
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+ struct vc4_dev *vc4 = to_vc4_dev(dev);
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+ struct vc4_hvs *hvs = vc4->hvs;
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+ struct drm_printer p = drm_seq_file_printer(m);
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+ unsigned int i, chan;
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+ u32 dispstat, dispbkgndx;
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+
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+ for (chan = 0; chan < SCALER_CHANNELS_COUNT; chan++) {
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+ u32 x_c, grad;
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+ u32 offset = SCALER5_DSPGAMMA_START +
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+ chan * SCALER5_DSPGAMMA_CHAN_OFFSET;
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+
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+ dispstat = VC4_GET_FIELD(HVS_READ(SCALER_DISPSTATX(chan)),
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+ SCALER_DISPSTATX_MODE);
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+ if (dispstat == SCALER_DISPSTATX_MODE_DISABLED ||
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+ dispstat == SCALER_DISPSTATX_MODE_EOF) {
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+ drm_printf(&p, "HVS channel %u: Channel disabled\n", chan);
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+ continue;
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+ }
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+
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+ dispbkgndx = HVS_READ(SCALER_DISPBKGNDX(chan));
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+ if (!(dispbkgndx & SCALER_DISPBKGND_GAMMA)) {
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+ drm_printf(&p, "HVS channel %u: Gamma disabled\n", chan);
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+ continue;
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+ }
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+
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+ drm_printf(&p, "HVS channel %u:\n", chan);
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+ drm_printf(&p, " red:\n");
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+ for (i = 0; i < SCALER5_DSPGAMMA_NUM_POINTS; i++, offset += 8) {
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+ x_c = HVS_READ(offset);
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+ grad = HVS_READ(offset + 4);
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+ drm_printf(&p, " %08x %08x - x %u, c %u, grad %u\n",
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+ x_c, grad,
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+ VC4_GET_FIELD(x_c, SCALER5_DSPGAMMA_OFF_X),
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+ VC4_GET_FIELD(x_c, SCALER5_DSPGAMMA_OFF_C),
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+ grad);
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+ }
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+ drm_printf(&p, " green:\n");
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+ for (i = 0; i < SCALER5_DSPGAMMA_NUM_POINTS; i++, offset += 8) {
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+ x_c = HVS_READ(offset);
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+ grad = HVS_READ(offset + 4);
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+ drm_printf(&p, " %08x %08x - x %u, c %u, grad %u\n",
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+ x_c, grad,
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+ VC4_GET_FIELD(x_c, SCALER5_DSPGAMMA_OFF_X),
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+ VC4_GET_FIELD(x_c, SCALER5_DSPGAMMA_OFF_C),
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+ grad);
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+ }
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+ drm_printf(&p, " blue:\n");
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+ for (i = 0; i < SCALER5_DSPGAMMA_NUM_POINTS; i++, offset += 8) {
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+ x_c = HVS_READ(offset);
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+ grad = HVS_READ(offset + 4);
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+ drm_printf(&p, " %08x %08x - x %u, c %u, grad %u\n",
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+ x_c, grad,
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+ VC4_GET_FIELD(x_c, SCALER5_DSPGAMMA_OFF_X),
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+ VC4_GET_FIELD(x_c, SCALER5_DSPGAMMA_OFF_C),
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+ grad);
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+ }
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+
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+ /* Alpha only valid on channel 2 */
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+ if (chan != 2)
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+ continue;
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+
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+ drm_printf(&p, " alpha:\n");
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+ for (i = 0; i < SCALER5_DSPGAMMA_NUM_POINTS; i++, offset += 8) {
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+ x_c = HVS_READ(offset);
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+ grad = HVS_READ(offset + 4);
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+ drm_printf(&p, " %08x %08x - x %u, c %u, grad %u\n",
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+ x_c, grad,
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+ VC4_GET_FIELD(x_c, SCALER5_DSPGAMMA_OFF_X),
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+ VC4_GET_FIELD(x_c, SCALER5_DSPGAMMA_OFF_C),
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+ grad);
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+ }
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+ }
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+ return 0;
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+}
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+
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/* The filter kernel is composed of dwords each containing 3 9-bit
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* signed integers packed next to each other.
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*/
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@@ -833,11 +912,15 @@ int vc4_hvs_debugfs_init(struct drm_minor *minor)
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if (!vc4->hvs)
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return -ENODEV;
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- if (!vc4->is_vc5)
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+ if (!vc4->is_vc5) {
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debugfs_create_bool("hvs_load_tracker", S_IRUGO | S_IWUSR,
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minor->debugfs_root,
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&vc4->load_tracker_enabled);
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+ vc4_debugfs_add_file(minor, "hvs_gamma", vc5_hvs_debugfs_gamma,
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+ NULL);
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+ }
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+
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ret = vc4_debugfs_add_file(minor, "hvs_dlists",
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vc4_hvs_debugfs_dlist, NULL);
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if (ret)
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--
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2.33.1
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