Currently there is no way to apply quirk on device only if certain panel
model is installed. This patch implements such mechanism by adding new
quirk type intel_dpcd_quirk which contains also sink_oui and sink_device_id
fields and using also them to figure out if applying quirk is needed.
New intel_init_dpcd_quirks is added and called after drm_dp_read_desc with
proper sink device identity read from dpcdc.
v3:
- !mem_is_zero fixed to mem_is_zero
v2:
- instead of using struct intel_quirk add new struct intel_dpcd_quirk
Signed-off-by: Jouni Högander <jouni.hogander@xxxxxxxxx>
---
.../drm/i915/display/intel_display_types.h | 4 ++
drivers/gpu/drm/i915/display/intel_dp.c | 4 ++
drivers/gpu/drm/i915/display/intel_quirks.c | 51 +++++++++++++++++++
drivers/gpu/drm/i915/display/intel_quirks.h | 5 ++
4 files changed, 64 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 868ff8976ed93..ba1617bcea9f5 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1907,6 +1907,10 @@ struct intel_dp {
} alpm_parameters;
u8 alpm_dpcd;
+
+ struct {
+ unsigned long mask;
+ } quirks;
};
enum lspcon_vendor {
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 789c2f78826d0..98ed39413a7de 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -84,6 +84,7 @@
#include "intel_pch_display.h"
#include "intel_pps.h"
#include "intel_psr.h"
+#include "intel_quirks.h"
#include "intel_tc.h"
#include "intel_vdsc.h"
#include "intel_vrr.h"
@@ -4053,6 +4054,7 @@ intel_edp_init_dpcd(struct intel_dp *intel_dp, struct intel_connector *connector
drm_dp_read_desc(&intel_dp->aux, &intel_dp->desc,
drm_dp_is_branch(intel_dp->dpcd));
+ intel_init_dpcd_quirks(intel_dp, &intel_dp->desc.ident);
/*
* Read the eDP display control registers.
@@ -4165,6 +4167,8 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp)
drm_dp_read_desc(&intel_dp->aux, &intel_dp->desc,
drm_dp_is_branch(intel_dp->dpcd));
+ intel_init_dpcd_quirks(intel_dp, &intel_dp->desc.ident);
+
intel_dp_update_sink_caps(intel_dp);
}
diff --git a/drivers/gpu/drm/i915/display/intel_quirks.c b/drivers/gpu/drm/i915/display/intel_quirks.c
index 14d5fefc9c5b2..bce1f67c918bb 100644
--- a/drivers/gpu/drm/i915/display/intel_quirks.c
+++ b/drivers/gpu/drm/i915/display/intel_quirks.c
@@ -14,6 +14,11 @@ static void intel_set_quirk(struct intel_display *display, enum intel_quirk_id q
display->quirks.mask |= BIT(quirk);
}
+static void intel_set_dpcd_quirk(struct intel_dp *intel_dp, enum intel_quirk_id quirk)
+{
+ intel_dp->quirks.mask |= BIT(quirk);
+}
+
/*
* Some machines (Lenovo U160) do not work with SSC on LVDS for some reason
*/
@@ -72,6 +77,21 @@ struct intel_quirk {
void (*hook)(struct intel_display *display);
};
+struct intel_dpcd_quirk {
+ int device;
+ int subsystem_vendor;
+ int subsystem_device;
+ u8 sink_oui[3];
+ u8 sink_device_id[6];
+ void (*hook)(struct intel_dp *intel_dp);
+};
+
+#define SINK_OUI(first, second, third) { (first), (second), (third) }
+#define SINK_DEVICE_ID(first, second, third, fourth, fifth, sixth) \
+ { (first), (second), (third), (fourth), (fifth), (sixth) }
+
+#define SINK_DEVICE_ID_ANY SINK_DEVICE_ID(0, 0, 0, 0, 0, 0)
+
/* For systems that don't have a meaningful PCI subdevice/subvendor ID */
struct intel_dmi_quirk {
void (*hook)(struct intel_display *display);
@@ -203,6 +223,9 @@ static struct intel_quirk intel_quirks[] = {
{ 0x0f31, 0x103c, 0x220f, quirk_invert_brightness },
};
+static struct intel_dpcd_quirk intel_dpcd_quirks[] = {
+};
+
void intel_init_quirks(struct intel_display *display)
{
struct pci_dev *d = to_pci_dev(display->drm->dev);
@@ -224,7 +247,35 @@ void intel_init_quirks(struct intel_display *display)
}
}
+void intel_init_dpcd_quirks(struct intel_dp *intel_dp,
+ const struct drm_dp_dpcd_ident *ident)
+{
+ struct intel_display *display = to_intel_display(intel_dp);
+ struct pci_dev *d = to_pci_dev(display->drm->dev);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(intel_dpcd_quirks); i++) {
+ struct intel_dpcd_quirk *q = &intel_dpcd_quirks[i];
+
+ if (d->device == q->device &&
+ (d->subsystem_vendor == q->subsystem_vendor ||
+ q->subsystem_vendor == PCI_ANY_ID) &&
+ (d->subsystem_device == q->subsystem_device ||
+ q->subsystem_device == PCI_ANY_ID) &&
+ !memcmp(q->sink_oui, ident->oui, sizeof(ident->oui)) &&
+ (!memcmp(q->sink_device_id, ident->device_id,
+ sizeof(ident->device_id)) ||
+ mem_is_zero(q->sink_device_id, sizeof(q->sink_device_id))))
+ q->hook(intel_dp);
+ }
+}
+
bool intel_has_quirk(struct intel_display *display, enum intel_quirk_id quirk)
{
return display->quirks.mask & BIT(quirk);
}
+
+bool intel_has_dpcd_quirk(struct intel_dp *intel_dp, enum intel_quirk_id quirk)
+{
+ return intel_dp->quirks.mask & BIT(quirk);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_quirks.h b/drivers/gpu/drm/i915/display/intel_quirks.h
index 151c8f4ae5760..c8db50b9ab74d 100644
--- a/drivers/gpu/drm/i915/display/intel_quirks.h
+++ b/drivers/gpu/drm/i915/display/intel_quirks.h
@@ -9,6 +9,8 @@
#include <linux/types.h>
struct intel_display;
+struct intel_dp;
+struct drm_dp_dpcd_ident;
enum intel_quirk_id {
QUIRK_BACKLIGHT_PRESENT,
@@ -20,6 +22,9 @@ enum intel_quirk_id {
};
void intel_init_quirks(struct intel_display *display);
+void intel_init_dpcd_quirks(struct intel_dp *intel_dp,
+ const struct drm_dp_dpcd_ident *ident);
bool intel_has_quirk(struct intel_display *display, enum intel_quirk_id quirk);
+bool intel_has_dpcd_quirk(struct intel_dp *intel_dp, enum intel_quirk_id quirk);
#endif /* __INTEL_QUIRKS_H__ */
--
2.34.1
