Merge tag 'drm-misc-next-2024-08-01' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

drm-misc-next for v6.12:

UAPI Changes:

virtio:
- Define DRM capset

Cross-subsystem Changes:

dma-buf:
- heaps: Clean up documentation

printk:
- Pass description to kmsg_dump()

Core Changes:

CI:
- Update IGT tests
- Point upstream repo to GitLab instance

modesetting:
- Introduce Power Saving Policy property for connectors
- Add might_fault() to drm_modeset_lock priming
- Add dynamic per-crtc vblank configuration support

panic:
- Avoid build-time interference with framebuffer console

docs:
- Document Colorspace property

scheduler:
- Remove full_recover from drm_sched_start

TTM:
- Make LRU walk restartable after dropping locks
- Allow direct reclaim to allocate local memory

Driver Changes:

amdgpu:
- Support Power Saving Policy connector property

ast:
- astdp: Support AST2600 with VGA; Clean up HPD

bridge:
- Silence error message on -EPROBE_DEFER
- analogix: Clean aup
- bridge-connector: Fix double free
- lt6505: Disable interrupt when powered off
- tc358767: Make default DP port preemphasis configurable

gma500:
- Update i2c terminology

ivpu:
- Add MODULE_FIRMWARE()

lcdif:
- Fix pixel clock

loongson:
- Use GEM refcount over TTM's

mgag200:
- Improve BMC handling
- Support VBLANK intterupts

nouveau:
- Refactor and clean up internals
- Use GEM refcount over TTM's

panel:
- Shutdown fixes plus documentation
- Refactor several drivers for better code sharing
- boe-th101mb31ig002: Support for starry-er88577 MIPI-DSI panel plus
  DT; Fix porch parameter
- edp: Support AOU B116XTN02.3, AUO B116XAN06.1, AOU B116XAT04.1,
  BOE NV140WUM-N41, BOE NV133WUM-N63, BOE NV116WHM-A4D, CMN N116BCA-EA2,
  CMN N116BCP-EA2, CSW MNB601LS1-4
- himax-hx8394: Support Microchip AC40T08A MIPI Display panel plus DT
- ilitek-ili9806e: Support Densitron DMT028VGHMCMI-1D TFT plus DT
- jd9365da: Support Melfas lmfbx101117480 MIPI-DSI panel plus DT; Refactor
  for code sharing

sti:
- Fix module owner

stm:
- Avoid UAF wih managed plane and CRTC helpers
- Fix module owner
- Fix error handling in probe
- Depend on COMMON_CLK
- ltdc: Fix transparency after disabling plane; Remove unused interrupt

tegra:
- Call drm_atomic_helper_shutdown()

v3d:
- Clean up perfmon

vkms:
- Clean up

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20240801121406.GA102996@linux.fritz.box

2 files changed, 57 insertions, 11 deletions

diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c
index d4c34f364140..6ee51003de3c 100644
--- a/drivers/gpu/drm/display/drm_dp_helper.c
+++ b/drivers/gpu/drm/display/drm_dp_helper.c
@@ -2328,6 +2328,31 @@ drm_dp_get_quirks(const struct drm_dp_dpcd_ident *ident, bool is_branch)
 #undef DEVICE_ID_ANY
 #undef DEVICE_ID
 
+static int drm_dp_read_ident(struct drm_dp_aux *aux, unsigned int offset,
+			     struct drm_dp_dpcd_ident *ident)
+{
+	int ret;
+
+	ret = drm_dp_dpcd_read(aux, offset, ident, sizeof(*ident));
+
+	return ret < 0 ? ret : 0;
+}
+
+static void drm_dp_dump_desc(struct drm_dp_aux *aux,
+			     const char *device_name, const struct drm_dp_desc *desc)
+{
+	const struct drm_dp_dpcd_ident *ident = &desc->ident;
+
+	drm_dbg_kms(aux->drm_dev,
+		    "%s: %s: OUI %*phD dev-ID %*pE HW-rev %d.%d SW-rev %d.%d quirks 0x%04x\n",
+		    aux->name, device_name,
+		    (int)sizeof(ident->oui), ident->oui,
+		    (int)strnlen(ident->device_id, sizeof(ident->device_id)), ident->device_id,
+		    ident->hw_rev >> 4, ident->hw_rev & 0xf,
+		    ident->sw_major_rev, ident->sw_minor_rev,
+		    desc->quirks);
+}
+
 /**
  * drm_dp_read_desc - read sink/branch descriptor from DPCD
  * @aux: DisplayPort AUX channel
@@ -2344,28 +2369,49 @@ int drm_dp_read_desc(struct drm_dp_aux *aux, struct drm_dp_desc *desc,
 {
 	struct drm_dp_dpcd_ident *ident = &desc->ident;
 	unsigned int offset = is_branch ? DP_BRANCH_OUI : DP_SINK_OUI;
-	int ret, dev_id_len;
+	int ret;
 
-	ret = drm_dp_dpcd_read(aux, offset, ident, sizeof(*ident));
+	ret = drm_dp_read_ident(aux, offset, ident);
 	if (ret < 0)
 		return ret;
 
 	desc->quirks = drm_dp_get_quirks(ident, is_branch);
 
-	dev_id_len = strnlen(ident->device_id, sizeof(ident->device_id));
-
-	drm_dbg_kms(aux->drm_dev,
-		    "%s: DP %s: OUI %*phD dev-ID %*pE HW-rev %d.%d SW-rev %d.%d quirks 0x%04x\n",
-		    aux->name, is_branch ? "branch" : "sink",
-		    (int)sizeof(ident->oui), ident->oui, dev_id_len,
-		    ident->device_id, ident->hw_rev >> 4, ident->hw_rev & 0xf,
-		    ident->sw_major_rev, ident->sw_minor_rev, desc->quirks);
+	drm_dp_dump_desc(aux, is_branch ? "DP branch" : "DP sink", desc);
 
 	return 0;
 }
 EXPORT_SYMBOL(drm_dp_read_desc);
 
 /**
+ * drm_dp_dump_lttpr_desc - read and dump the DPCD descriptor for an LTTPR PHY
+ * @aux: DisplayPort AUX channel
+ * @dp_phy: LTTPR PHY instance
+ *
+ * Read the DPCD LTTPR PHY descriptor for @dp_phy and print a debug message
+ * with its details to dmesg.
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+int drm_dp_dump_lttpr_desc(struct drm_dp_aux *aux, enum drm_dp_phy dp_phy)
+{
+	struct drm_dp_desc desc = {};
+	int ret;
+
+	if (drm_WARN_ON(aux->drm_dev, dp_phy < DP_PHY_LTTPR1 || dp_phy > DP_MAX_LTTPR_COUNT))
+		return -EINVAL;
+
+	ret = drm_dp_read_ident(aux, DP_OUI_PHY_REPEATER(dp_phy), &desc.ident);
+	if (ret < 0)
+		return ret;
+
+	drm_dp_dump_desc(aux, drm_dp_phy_name(dp_phy), &desc);
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_dp_dump_lttpr_desc);
+
+/**
  * drm_dp_dsc_sink_bpp_incr() - Get bits per pixel increment
  * @dsc_dpcd: DSC capabilities from DPCD
  *
diff --git a/drivers/gpu/drm/display/drm_dp_mst_topology.c b/drivers/gpu/drm/display/drm_dp_mst_topology.c
index fc2ceae61db2..65c1700f3e40 100644
--- a/drivers/gpu/drm/display/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/display/drm_dp_mst_topology.c
@@ -4963,7 +4963,7 @@ void drm_dp_mst_dump_topology(struct seq_file *m,
 		seq_printf(m, "branch oui: %*phN devid: ", 3, buf);
 
 		for (i = 0x3; i < 0x8 && buf[i]; i++)
-			seq_printf(m, "%c", buf[i]);
+			seq_putc(m, buf[i]);
 		seq_printf(m, " revision: hw: %x.%x sw: %x.%x\n",
 			   buf[0x9] >> 4, buf[0x9] & 0xf, buf[0xa], buf[0xb]);
 		if (dump_dp_payload_table(mgr, buf))