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Message-ID: <20250127032024.1542219-3-shiyongbang@huawei.com>
Date: Mon, 27 Jan 2025 11:20:22 +0800
From: Yongbang Shi <shiyongbang@...wei.com>
To: <xinliang.liu@...aro.org>, <tiantao6@...ilicon.com>,
<maarten.lankhorst@...ux.intel.com>, <mripard@...nel.org>,
<tzimmermann@...e.de>, <airlied@...il.com>, <daniel@...ll.ch>,
<kong.kongxinwei@...ilicon.com>
CC: <liangjian010@...wei.com>, <chenjianmin@...wei.com>,
<lidongming5@...wei.com>, <shiyongbang@...wei.com>, <libaihan@...wei.com>,
<shenjian15@...wei.com>, <shaojijie@...wei.com>,
<dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v1 drm-dp 2/4] drm/hisilicon/hibmc: Getting connector info and edid by using aux channel
From: Baihan Li <libaihan@...wei.com>
Registering drm_aux and using it to get connector edid with drm functions.
Refactoring some structs to fit aux's register framework.
Signed-off-by: Baihan Li <libaihan@...wei.com>
Signed-off-by: Yongbang Shi <shiyongbang@...wei.com>
---
drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.c | 16 +++++---
drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h | 7 +++-
drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c | 5 ++-
drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h | 2 +
drivers/gpu/drm/hisilicon/hibmc/dp/dp_link.c | 22 +++++-----
.../gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c | 40 +++++++++++++++++--
.../gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h | 5 +++
7 files changed, 72 insertions(+), 25 deletions(-)
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.c b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.c
index 0a903cce1fa9..c07c970d2e50 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.c
@@ -8,6 +8,7 @@
#include <drm/drm_print.h>
#include "dp_comm.h"
#include "dp_reg.h"
+#include "dp_hw.h"
#define HIBMC_AUX_CMD_REQ_LEN GENMASK(7, 4)
#define HIBMC_AUX_CMD_ADDR GENMASK(27, 8)
@@ -124,7 +125,8 @@ static int hibmc_dp_aux_parse_xfer(struct hibmc_dp_dev *dp, struct drm_dp_aux_ms
/* ret >= 0 ,ret is size; ret < 0, ret is err code */
static ssize_t hibmc_dp_aux_xfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
{
- struct hibmc_dp_dev *dp = container_of(aux, struct hibmc_dp_dev, aux);
+ struct hibmc_dp_dev *dp = ((struct hibmc_dp *)container_of(aux, struct hibmc_dp,
+ aux))->dp_dev;
u32 aux_cmd;
int ret;
u32 val; /* val will be assigned at the beginning of readl_poll_timeout function */
@@ -151,14 +153,16 @@ static ssize_t hibmc_dp_aux_xfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *
return hibmc_dp_aux_parse_xfer(dp, msg);
}
-void hibmc_dp_aux_init(struct hibmc_dp_dev *dp)
+void hibmc_dp_aux_init(struct hibmc_dp *dp)
{
- hibmc_dp_reg_write_field(dp, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_SYNC_LEN_SEL, 0x0);
- hibmc_dp_reg_write_field(dp, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_TIMER_TIMEOUT, 0x1);
- hibmc_dp_reg_write_field(dp, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_MIN_PULSE_NUM,
+ hibmc_dp_reg_write_field(dp->dp_dev, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_SYNC_LEN_SEL, 0x0);
+ hibmc_dp_reg_write_field(dp->dp_dev, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_TIMER_TIMEOUT, 0x1);
+ hibmc_dp_reg_write_field(dp->dp_dev, HIBMC_DP_AUX_REQ, HIBMC_DP_CFG_AUX_MIN_PULSE_NUM,
HIBMC_DP_MIN_PULSE_NUM);
dp->aux.transfer = hibmc_dp_aux_xfer;
- dp->aux.is_remote = 0;
+ dp->aux.name = kasprintf(GFP_KERNEL, "HIBMC DRM dp aux");
+ dp->aux.drm_dev = dp->drm_dev;
drm_dp_aux_init(&dp->aux);
+ dp->dp_dev->aux = &dp->aux;
}
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h
index 00b23301d26e..7edcecd5a5f0 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h
@@ -11,8 +11,11 @@
#include <linux/kernel.h>
#include <linux/bitfield.h>
#include <linux/io.h>
+
#include <drm/display/drm_dp_helper.h>
+#include "dp_hw.h"
+
#define HIBMC_DP_LANE_NUM_MAX 2
struct hibmc_link_status {
@@ -32,7 +35,7 @@ struct hibmc_dp_link {
};
struct hibmc_dp_dev {
- struct drm_dp_aux aux;
+ struct drm_dp_aux *aux;
struct drm_device *dev;
void __iomem *base;
struct mutex lock; /* protects concurrent RW in hibmc_dp_reg_write_field() */
@@ -58,7 +61,7 @@ struct hibmc_dp_dev {
mutex_unlock(&_dp->lock); \
} while (0)
-void hibmc_dp_aux_init(struct hibmc_dp_dev *dp);
+void hibmc_dp_aux_init(struct hibmc_dp *dp);
int hibmc_dp_link_training(struct hibmc_dp_dev *dp);
#endif
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c
index 0dac4cfdde7c..50050908606f 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c
@@ -3,6 +3,7 @@
#include <linux/io.h>
#include <linux/delay.h>
+#include <drm/drm_managed.h>
#include "dp_config.h"
#include "dp_comm.h"
#include "dp_reg.h"
@@ -156,7 +157,7 @@ int hibmc_dp_hw_init(struct hibmc_dp *dp)
struct drm_device *drm_dev = dp->drm_dev;
struct hibmc_dp_dev *dp_dev;
- dp_dev = devm_kzalloc(drm_dev->dev, sizeof(struct hibmc_dp_dev), GFP_KERNEL);
+ dp_dev = drmm_kcalloc(drm_dev, 1, sizeof(struct hibmc_dp_dev), GFP_KERNEL);
if (!dp_dev)
return -ENOMEM;
@@ -167,7 +168,7 @@ int hibmc_dp_hw_init(struct hibmc_dp *dp)
dp_dev->dev = drm_dev;
dp_dev->base = dp->mmio + HIBMC_DP_OFFSET;
- hibmc_dp_aux_init(dp_dev);
+ hibmc_dp_aux_init(dp);
if (hibmc_dp_phy_init(dp_dev))
return -EAGAIN;
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h
index 4dc13b3d9875..53b6d0beecea 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.h
@@ -10,6 +10,7 @@
#include <drm/drm_encoder.h>
#include <drm/drm_connector.h>
#include <drm/drm_print.h>
+#include <drm/display/drm_dp_helper.h>
struct hibmc_dp_dev;
@@ -19,6 +20,7 @@ struct hibmc_dp {
struct drm_encoder encoder;
struct drm_connector connector;
void __iomem *mmio;
+ struct drm_dp_aux aux;
};
int hibmc_dp_hw_init(struct hibmc_dp *dp);
diff --git a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_link.c b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_link.c
index 1124cd70c320..695cb9c0b643 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/dp/dp_link.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/dp/dp_link.c
@@ -27,7 +27,7 @@ static int hibmc_dp_link_training_configure(struct hibmc_dp_dev *dp)
/* set rate and lane count */
buf[0] = dp->link.cap.link_rate;
buf[1] = DP_LANE_COUNT_ENHANCED_FRAME_EN | dp->link.cap.lanes;
- ret = drm_dp_dpcd_write(&dp->aux, DP_LINK_BW_SET, buf, sizeof(buf));
+ ret = drm_dp_dpcd_write(dp->aux, DP_LINK_BW_SET, buf, sizeof(buf));
if (ret != sizeof(buf)) {
drm_dbg_dp(dp->dev, "dp aux write link rate and lanes failed, ret: %d\n", ret);
return ret >= 0 ? -EIO : ret;
@@ -36,13 +36,13 @@ static int hibmc_dp_link_training_configure(struct hibmc_dp_dev *dp)
/* set 8b/10b and downspread */
buf[0] = DP_SPREAD_AMP_0_5;
buf[1] = DP_SET_ANSI_8B10B;
- ret = drm_dp_dpcd_write(&dp->aux, DP_DOWNSPREAD_CTRL, buf, sizeof(buf));
+ ret = drm_dp_dpcd_write(dp->aux, DP_DOWNSPREAD_CTRL, buf, sizeof(buf));
if (ret != sizeof(buf)) {
drm_dbg_dp(dp->dev, "dp aux write 8b/10b and downspread failed, ret: %d\n", ret);
return ret >= 0 ? -EIO : ret;
}
- ret = drm_dp_read_dpcd_caps(&dp->aux, dp->dpcd);
+ ret = drm_dp_read_dpcd_caps(dp->aux, dp->dpcd);
if (ret)
drm_err(dp->dev, "dp aux read dpcd failed, ret: %d\n", ret);
@@ -85,7 +85,7 @@ static int hibmc_dp_link_set_pattern(struct hibmc_dp_dev *dp, int pattern)
hibmc_dp_reg_write_field(dp, HIBMC_DP_PHYIF_CTRL0, HIBMC_DP_CFG_PAT_SEL, val);
- ret = drm_dp_dpcd_write(&dp->aux, DP_TRAINING_PATTERN_SET, &buf, sizeof(buf));
+ ret = drm_dp_dpcd_write(dp->aux, DP_TRAINING_PATTERN_SET, &buf, sizeof(buf));
if (ret != sizeof(buf)) {
drm_dbg_dp(dp->dev, "dp aux write training pattern set failed\n");
return ret >= 0 ? -EIO : ret;
@@ -115,7 +115,7 @@ static int hibmc_dp_link_training_cr_pre(struct hibmc_dp_dev *dp)
if (ret)
return ret;
- ret = drm_dp_dpcd_write(&dp->aux, DP_TRAINING_LANE0_SET, train_set, dp->link.cap.lanes);
+ ret = drm_dp_dpcd_write(dp->aux, DP_TRAINING_LANE0_SET, train_set, dp->link.cap.lanes);
if (ret != dp->link.cap.lanes) {
drm_dbg_dp(dp->dev, "dp aux write training lane set failed\n");
return ret >= 0 ? -EIO : ret;
@@ -198,9 +198,9 @@ static int hibmc_dp_link_training_cr(struct hibmc_dp_dev *dp)
voltage_tries = 1;
for (cr_tries = 0; cr_tries < 80; cr_tries++) {
- drm_dp_link_train_clock_recovery_delay(&dp->aux, dp->dpcd);
+ drm_dp_link_train_clock_recovery_delay(dp->aux, dp->dpcd);
- ret = drm_dp_dpcd_read_link_status(&dp->aux, lane_status);
+ ret = drm_dp_dpcd_read_link_status(dp->aux, lane_status);
if (ret != DP_LINK_STATUS_SIZE) {
drm_err(dp->dev, "Get lane status failed\n");
return ret;
@@ -224,7 +224,7 @@ static int hibmc_dp_link_training_cr(struct hibmc_dp_dev *dp)
if (ret)
return ret;
- ret = drm_dp_dpcd_write(&dp->aux, DP_TRAINING_LANE0_SET, dp->link.train_set,
+ ret = drm_dp_dpcd_write(dp->aux, DP_TRAINING_LANE0_SET, dp->link.train_set,
dp->link.cap.lanes);
if (ret != dp->link.cap.lanes) {
drm_dbg_dp(dp->dev, "Update link training failed\n");
@@ -251,9 +251,9 @@ static int hibmc_dp_link_training_channel_eq(struct hibmc_dp_dev *dp)
return ret;
for (eq_tries = 0; eq_tries < HIBMC_EQ_MAX_RETRY; eq_tries++) {
- drm_dp_link_train_channel_eq_delay(&dp->aux, dp->dpcd);
+ drm_dp_link_train_channel_eq_delay(dp->aux, dp->dpcd);
- ret = drm_dp_dpcd_read_link_status(&dp->aux, lane_status);
+ ret = drm_dp_dpcd_read_link_status(dp->aux, lane_status);
if (ret != DP_LINK_STATUS_SIZE) {
drm_err(dp->dev, "get lane status failed\n");
break;
@@ -278,7 +278,7 @@ static int hibmc_dp_link_training_channel_eq(struct hibmc_dp_dev *dp)
if (ret)
return ret;
- ret = drm_dp_dpcd_write(&dp->aux, DP_TRAINING_LANE0_SET,
+ ret = drm_dp_dpcd_write(dp->aux, DP_TRAINING_LANE0_SET,
dp->link.train_set, dp->link.cap.lanes);
if (ret != dp->link.cap.lanes) {
drm_dbg_dp(dp->dev, "Update link training failed\n");
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c
index 603d6b198a54..fac8485a69d9 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_dp.c
@@ -15,11 +15,27 @@
static int hibmc_dp_connector_get_modes(struct drm_connector *connector)
{
+ struct hibmc_dp *dp = to_hibmc_dp(connector);
+ const struct drm_edid *drm_edid;
int count;
- count = drm_add_modes_noedid(connector, connector->dev->mode_config.max_width,
+ drm_edid = drm_edid_read_ddc(connector, &dp->aux.ddc);
+
+ drm_edid_connector_update(connector, drm_edid);
+
+ if (drm_edid) {
+ count = drm_edid_connector_add_modes(connector);
+ if (count)
+ goto out;
+ }
+
+ count = drm_add_modes_noedid(connector,
+ connector->dev->mode_config.max_width,
connector->dev->mode_config.max_height);
- drm_set_preferred_mode(connector, 1024, 768); // temporary implementation
+ drm_set_preferred_mode(connector, 1024, 768);
+
+out:
+ drm_edid_free(drm_edid);
return count;
}
@@ -28,12 +44,28 @@ static const struct drm_connector_helper_funcs hibmc_dp_conn_helper_funcs = {
.get_modes = hibmc_dp_connector_get_modes,
};
+static int hibmc_dp_late_register(struct drm_connector *connector)
+{
+ struct hibmc_dp *dp = to_hibmc_dp(connector);
+
+ return drm_dp_aux_register(&dp->aux);
+}
+
+static void hibmc_dp_early_unregister(struct drm_connector *connector)
+{
+ struct hibmc_dp *dp = to_hibmc_dp(connector);
+
+ drm_dp_aux_unregister(&dp->aux);
+}
+
static const struct drm_connector_funcs hibmc_dp_conn_funcs = {
.reset = drm_atomic_helper_connector_reset,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = drm_connector_cleanup,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+ .late_register = hibmc_dp_late_register,
+ .early_unregister = hibmc_dp_early_unregister,
};
static inline int hibmc_dp_prepare(struct hibmc_dp *dp, struct drm_display_mode *mode)
@@ -103,8 +135,8 @@ int hibmc_dp_init(struct hibmc_drm_private *priv)
drm_encoder_helper_add(encoder, &hibmc_dp_encoder_helper_funcs);
- ret = drm_connector_init(dev, connector, &hibmc_dp_conn_funcs,
- DRM_MODE_CONNECTOR_DisplayPort);
+ ret = drm_connector_init_with_ddc(dev, connector, &hibmc_dp_conn_funcs,
+ DRM_MODE_CONNECTOR_DisplayPort, &dp->aux.ddc);
if (ret) {
drm_err(dev, "init dp connector failed: %d\n", ret);
return ret;
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
index d982f1e4b958..3ddd71aada66 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
@@ -47,6 +47,11 @@ static inline struct hibmc_vdac *to_hibmc_vdac(struct drm_connector *connector)
return container_of(connector, struct hibmc_vdac, connector);
}
+static inline struct hibmc_dp *to_hibmc_dp(struct drm_connector *connector)
+{
+ return container_of(connector, struct hibmc_dp, connector);
+}
+
static inline struct hibmc_drm_private *to_hibmc_drm_private(struct drm_device *dev)
{
return container_of(dev, struct hibmc_drm_private, dev);
--
2.33.0
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