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20ea6adbf1
Build system: x86_64 Build-tested: bcm2708, bcm2709, bcm2710, bcm2711 Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B Signed-off-by: Marty Jones <mj8263788@gmail.com> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
115 lines
3.7 KiB
Diff
115 lines
3.7 KiB
Diff
From db56206e77d1a71c145669dc41d0ada496ea8e4f 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] 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 | 81 +++++++++++++++++++++++++++++++++++
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1 file changed, 81 insertions(+)
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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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@@ -134,6 +134,84 @@ static int vc4_hvs_debugfs_dlist(struct
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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 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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@@ -809,6 +887,9 @@ static int vc4_hvs_bind(struct device *d
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NULL);
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vc4_debugfs_add_file(drm, "hvs_dlists", vc4_hvs_debugfs_dlist,
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NULL);
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+ if (hvs->hvs5)
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+ vc4_debugfs_add_file(drm, "hvs_gamma", vc5_hvs_debugfs_gamma,
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+ NULL);
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return 0;
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}
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