* [PATCH v3] drm/msm/dp: employ bridge mechanism for display enable and disable
@ 2021-11-15 18:48 ` Kuogee Hsieh
0 siblings, 0 replies; 6+ messages in thread
From: Kuogee Hsieh @ 2021-11-15 18:48 UTC (permalink / raw)
To: robdclark, sean, swboyd, vkoul, daniel, airlied, agross,
dmitry.baryshkov, bjorn.andersson
Cc: linux-arm-msm, quic_abhinavk, dri-devel, quic_khsieh, aravindh,
freedreno, linux-kernel
Currently the msm_dp_*** functions implement the same sequence which would
happen when drm_bridge is used. hence get rid of this intermediate layer
and align with the drm_bridge usage to avoid customized implementation.
Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Changes in v2:
-- revise commit text
-- rename dp_bridge to msm_dp_bridge
-- delete empty functions
Changes in 3:
-- replace kzalloc() with devm_kzalloc()
-- replace __dp_display_enable() with dp_display_enable()
-- replace __dp_display_disable() with dp_display_disable()
---
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 21 -------
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 7 +++
drivers/gpu/drm/msm/dp/dp_display.c | 4 +-
drivers/gpu/drm/msm/dp/dp_display.h | 1 +
drivers/gpu/drm/msm/dp/dp_drm.c | 91 +++++++++++++++++++++++++++++
drivers/gpu/drm/msm/msm_drv.h | 16 +++--
6 files changed, 113 insertions(+), 27 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 31050aa..c4e08c4 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -1003,9 +1003,6 @@ static void dpu_encoder_virt_mode_set(struct drm_encoder *drm_enc,
trace_dpu_enc_mode_set(DRMID(drm_enc));
- if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS)
- msm_dp_display_mode_set(dpu_enc->dp, drm_enc, mode, adj_mode);
-
list_for_each_entry(conn_iter, connector_list, head)
if (conn_iter->encoder == drm_enc)
conn = conn_iter;
@@ -1181,14 +1178,6 @@ static void dpu_encoder_virt_enable(struct drm_encoder *drm_enc)
_dpu_encoder_virt_enable_helper(drm_enc);
- if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
- ret = msm_dp_display_enable(dpu_enc->dp, drm_enc);
- if (ret) {
- DPU_ERROR_ENC(dpu_enc, "dp display enable failed: %d\n",
- ret);
- goto out;
- }
- }
dpu_enc->enabled = true;
out:
@@ -1214,11 +1203,6 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
/* wait for idle */
dpu_encoder_wait_for_event(drm_enc, MSM_ENC_TX_COMPLETE);
- if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
- if (msm_dp_display_pre_disable(dpu_enc->dp, drm_enc))
- DPU_ERROR_ENC(dpu_enc, "dp display push idle failed\n");
- }
-
dpu_encoder_resource_control(drm_enc, DPU_ENC_RC_EVENT_PRE_STOP);
for (i = 0; i < dpu_enc->num_phys_encs; i++) {
@@ -1243,11 +1227,6 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
DPU_DEBUG_ENC(dpu_enc, "encoder disabled\n");
- if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
- if (msm_dp_display_disable(dpu_enc->dp, drm_enc))
- DPU_ERROR_ENC(dpu_enc, "dp display disable failed\n");
- }
-
mutex_unlock(&dpu_enc->enc_lock);
}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 27d98b5..d16337f 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -557,6 +557,13 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev,
encoder->base.id, rc);
return rc;
}
+
+ rc = msm_dp_bridge_init(priv->dp[i], dev, encoder);
+ if (rc) {
+ DPU_ERROR("failed to setup DPU bridge %d: rc:%d\n",
+ encoder->base.id, rc);
+ return rc;
+ }
}
return rc;
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 2f113ff..51770a4 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1674,8 +1674,8 @@ int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
}
void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
- struct drm_display_mode *mode,
- struct drm_display_mode *adjusted_mode)
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
{
struct dp_display_private *dp_display;
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
index 76f45f9..2237e80 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -13,6 +13,7 @@
struct msm_dp {
struct drm_device *drm_dev;
struct device *codec_dev;
+ struct drm_bridge *bridge;
struct drm_connector *connector;
struct drm_encoder *encoder;
struct drm_panel *drm_panel;
diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
index f33e315..b341f1f 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.c
+++ b/drivers/gpu/drm/msm/dp/dp_drm.c
@@ -5,12 +5,21 @@
#include <drm/drm_atomic_helper.h>
#include <drm/drm_atomic.h>
+#include <drm/drm_bridge.h>
#include <drm/drm_crtc.h>
#include "msm_drv.h"
#include "msm_kms.h"
#include "dp_drm.h"
+
+struct msm_dp_bridge {
+ struct drm_bridge bridge;
+ struct msm_dp *dp_display;
+};
+
+#define to_dp_display(x) container_of((x), struct msm_dp_bridge, bridge)
+
struct dp_connector {
struct drm_connector base;
struct msm_dp *dp_display;
@@ -162,3 +171,85 @@ struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display)
return connector;
}
+
+static int dp_bridge_attach(struct drm_bridge *drm_bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ return 0;
+}
+
+static void dp_bridge_mode_set(struct drm_bridge *drm_bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
+ struct msm_dp *dp_display = dp_bridge->dp_display;
+
+ msm_dp_display_mode_set(dp_display, drm_bridge->encoder, mode, adjusted_mode);
+}
+
+static void dp_bridge_enable(struct drm_bridge *drm_bridge)
+{
+ struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
+ struct msm_dp *dp_display = dp_bridge->dp_display;
+
+ msm_dp_display_enable(dp_display, drm_bridge->encoder);
+}
+
+static void dp_bridge_disable(struct drm_bridge *drm_bridge)
+{
+ struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
+ struct msm_dp *dp_display = dp_bridge->dp_display;
+
+ msm_dp_display_pre_disable(dp_display, drm_bridge->encoder);
+}
+
+static void dp_bridge_post_disable(struct drm_bridge *drm_bridge)
+{
+ struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
+ struct msm_dp *dp_display = dp_bridge->dp_display;
+
+ msm_dp_display_disable(dp_display, drm_bridge->encoder);
+}
+
+static const struct drm_bridge_funcs dp_bridge_ops = {
+ .attach = dp_bridge_attach,
+ .mode_fixup = NULL,
+ .pre_enable = NULL,
+ .enable = dp_bridge_enable,
+ .disable = dp_bridge_disable,
+ .post_disable = dp_bridge_post_disable,
+ .mode_set = dp_bridge_mode_set,
+};
+
+int msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev,
+ struct drm_encoder *encoder)
+{
+ int rc;
+ struct msm_drm_private *priv;
+ struct msm_dp_bridge *dp_bridge;
+ struct drm_bridge *bridge;
+
+ dp_bridge = devm_kzalloc(dev->dev, sizeof(*dp_bridge), GFP_KERNEL);
+ if (!dp_bridge)
+ return -ENOMEM;
+
+ dp_bridge->dp_display = dp_display;
+
+ bridge = &dp_bridge->bridge;
+ bridge->funcs = &dp_bridge_ops;
+ bridge->encoder = encoder;
+
+ rc = drm_bridge_attach(encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+ if (rc) {
+ DRM_ERROR("failed to attach bridge, rc=%d\n", rc);
+ kfree(dp_bridge);
+ return rc;
+ }
+
+ priv = dev->dev_private;
+ priv->bridges[priv->num_bridges++] = bridge;
+ dp_display->bridge = bridge;
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 4bb797e..9a2092f 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -388,8 +388,10 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder);
int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder);
int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder);
void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
- struct drm_display_mode *mode,
- struct drm_display_mode *adjusted_mode);
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode);
+int msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev,
+ struct drm_encoder *encoder);
void msm_dp_irq_postinstall(struct msm_dp *dp_display);
void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp_display);
@@ -426,10 +428,16 @@ static inline int msm_dp_display_pre_disable(struct msm_dp *dp,
}
static inline void msm_dp_display_mode_set(struct msm_dp *dp,
struct drm_encoder *encoder,
- struct drm_display_mode *mode,
- struct drm_display_mode *adjusted_mode)
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
{
}
+static inline int msm_dp_bridge_init(struct msm_dp *dp_display,
+ struct drm_device *dev,
+ struct drm_encoder *encoder)
+{
+ return -EINVAL;
+}
static inline void msm_dp_irq_postinstall(struct msm_dp *dp_display)
{
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH v3] drm/msm/dp: employ bridge mechanism for display enable and disable
@ 2021-11-15 18:48 ` Kuogee Hsieh
0 siblings, 0 replies; 6+ messages in thread
From: Kuogee Hsieh @ 2021-11-15 18:48 UTC (permalink / raw)
To: robdclark, sean, swboyd, vkoul, daniel, airlied, agross,
dmitry.baryshkov, bjorn.andersson
Cc: quic_abhinavk, aravindh, quic_khsieh, freedreno, dri-devel,
linux-arm-msm, linux-kernel
Currently the msm_dp_*** functions implement the same sequence which would
happen when drm_bridge is used. hence get rid of this intermediate layer
and align with the drm_bridge usage to avoid customized implementation.
Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Changes in v2:
-- revise commit text
-- rename dp_bridge to msm_dp_bridge
-- delete empty functions
Changes in 3:
-- replace kzalloc() with devm_kzalloc()
-- replace __dp_display_enable() with dp_display_enable()
-- replace __dp_display_disable() with dp_display_disable()
---
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 21 -------
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 7 +++
drivers/gpu/drm/msm/dp/dp_display.c | 4 +-
drivers/gpu/drm/msm/dp/dp_display.h | 1 +
drivers/gpu/drm/msm/dp/dp_drm.c | 91 +++++++++++++++++++++++++++++
drivers/gpu/drm/msm/msm_drv.h | 16 +++--
6 files changed, 113 insertions(+), 27 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 31050aa..c4e08c4 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -1003,9 +1003,6 @@ static void dpu_encoder_virt_mode_set(struct drm_encoder *drm_enc,
trace_dpu_enc_mode_set(DRMID(drm_enc));
- if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS)
- msm_dp_display_mode_set(dpu_enc->dp, drm_enc, mode, adj_mode);
-
list_for_each_entry(conn_iter, connector_list, head)
if (conn_iter->encoder == drm_enc)
conn = conn_iter;
@@ -1181,14 +1178,6 @@ static void dpu_encoder_virt_enable(struct drm_encoder *drm_enc)
_dpu_encoder_virt_enable_helper(drm_enc);
- if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
- ret = msm_dp_display_enable(dpu_enc->dp, drm_enc);
- if (ret) {
- DPU_ERROR_ENC(dpu_enc, "dp display enable failed: %d\n",
- ret);
- goto out;
- }
- }
dpu_enc->enabled = true;
out:
@@ -1214,11 +1203,6 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
/* wait for idle */
dpu_encoder_wait_for_event(drm_enc, MSM_ENC_TX_COMPLETE);
- if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
- if (msm_dp_display_pre_disable(dpu_enc->dp, drm_enc))
- DPU_ERROR_ENC(dpu_enc, "dp display push idle failed\n");
- }
-
dpu_encoder_resource_control(drm_enc, DPU_ENC_RC_EVENT_PRE_STOP);
for (i = 0; i < dpu_enc->num_phys_encs; i++) {
@@ -1243,11 +1227,6 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
DPU_DEBUG_ENC(dpu_enc, "encoder disabled\n");
- if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
- if (msm_dp_display_disable(dpu_enc->dp, drm_enc))
- DPU_ERROR_ENC(dpu_enc, "dp display disable failed\n");
- }
-
mutex_unlock(&dpu_enc->enc_lock);
}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 27d98b5..d16337f 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -557,6 +557,13 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev,
encoder->base.id, rc);
return rc;
}
+
+ rc = msm_dp_bridge_init(priv->dp[i], dev, encoder);
+ if (rc) {
+ DPU_ERROR("failed to setup DPU bridge %d: rc:%d\n",
+ encoder->base.id, rc);
+ return rc;
+ }
}
return rc;
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 2f113ff..51770a4 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1674,8 +1674,8 @@ int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
}
void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
- struct drm_display_mode *mode,
- struct drm_display_mode *adjusted_mode)
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
{
struct dp_display_private *dp_display;
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
index 76f45f9..2237e80 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -13,6 +13,7 @@
struct msm_dp {
struct drm_device *drm_dev;
struct device *codec_dev;
+ struct drm_bridge *bridge;
struct drm_connector *connector;
struct drm_encoder *encoder;
struct drm_panel *drm_panel;
diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
index f33e315..b341f1f 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.c
+++ b/drivers/gpu/drm/msm/dp/dp_drm.c
@@ -5,12 +5,21 @@
#include <drm/drm_atomic_helper.h>
#include <drm/drm_atomic.h>
+#include <drm/drm_bridge.h>
#include <drm/drm_crtc.h>
#include "msm_drv.h"
#include "msm_kms.h"
#include "dp_drm.h"
+
+struct msm_dp_bridge {
+ struct drm_bridge bridge;
+ struct msm_dp *dp_display;
+};
+
+#define to_dp_display(x) container_of((x), struct msm_dp_bridge, bridge)
+
struct dp_connector {
struct drm_connector base;
struct msm_dp *dp_display;
@@ -162,3 +171,85 @@ struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display)
return connector;
}
+
+static int dp_bridge_attach(struct drm_bridge *drm_bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ return 0;
+}
+
+static void dp_bridge_mode_set(struct drm_bridge *drm_bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
+ struct msm_dp *dp_display = dp_bridge->dp_display;
+
+ msm_dp_display_mode_set(dp_display, drm_bridge->encoder, mode, adjusted_mode);
+}
+
+static void dp_bridge_enable(struct drm_bridge *drm_bridge)
+{
+ struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
+ struct msm_dp *dp_display = dp_bridge->dp_display;
+
+ msm_dp_display_enable(dp_display, drm_bridge->encoder);
+}
+
+static void dp_bridge_disable(struct drm_bridge *drm_bridge)
+{
+ struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
+ struct msm_dp *dp_display = dp_bridge->dp_display;
+
+ msm_dp_display_pre_disable(dp_display, drm_bridge->encoder);
+}
+
+static void dp_bridge_post_disable(struct drm_bridge *drm_bridge)
+{
+ struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
+ struct msm_dp *dp_display = dp_bridge->dp_display;
+
+ msm_dp_display_disable(dp_display, drm_bridge->encoder);
+}
+
+static const struct drm_bridge_funcs dp_bridge_ops = {
+ .attach = dp_bridge_attach,
+ .mode_fixup = NULL,
+ .pre_enable = NULL,
+ .enable = dp_bridge_enable,
+ .disable = dp_bridge_disable,
+ .post_disable = dp_bridge_post_disable,
+ .mode_set = dp_bridge_mode_set,
+};
+
+int msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev,
+ struct drm_encoder *encoder)
+{
+ int rc;
+ struct msm_drm_private *priv;
+ struct msm_dp_bridge *dp_bridge;
+ struct drm_bridge *bridge;
+
+ dp_bridge = devm_kzalloc(dev->dev, sizeof(*dp_bridge), GFP_KERNEL);
+ if (!dp_bridge)
+ return -ENOMEM;
+
+ dp_bridge->dp_display = dp_display;
+
+ bridge = &dp_bridge->bridge;
+ bridge->funcs = &dp_bridge_ops;
+ bridge->encoder = encoder;
+
+ rc = drm_bridge_attach(encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);
+ if (rc) {
+ DRM_ERROR("failed to attach bridge, rc=%d\n", rc);
+ kfree(dp_bridge);
+ return rc;
+ }
+
+ priv = dev->dev_private;
+ priv->bridges[priv->num_bridges++] = bridge;
+ dp_display->bridge = bridge;
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 4bb797e..9a2092f 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -388,8 +388,10 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder);
int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder);
int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder);
void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
- struct drm_display_mode *mode,
- struct drm_display_mode *adjusted_mode);
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode);
+int msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev,
+ struct drm_encoder *encoder);
void msm_dp_irq_postinstall(struct msm_dp *dp_display);
void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp_display);
@@ -426,10 +428,16 @@ static inline int msm_dp_display_pre_disable(struct msm_dp *dp,
}
static inline void msm_dp_display_mode_set(struct msm_dp *dp,
struct drm_encoder *encoder,
- struct drm_display_mode *mode,
- struct drm_display_mode *adjusted_mode)
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
{
}
+static inline int msm_dp_bridge_init(struct msm_dp *dp_display,
+ struct drm_device *dev,
+ struct drm_encoder *encoder)
+{
+ return -EINVAL;
+}
static inline void msm_dp_irq_postinstall(struct msm_dp *dp_display)
{
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH v3] drm/msm/dp: employ bridge mechanism for display enable and disable
2021-11-15 18:48 ` Kuogee Hsieh
@ 2021-11-24 19:45 ` Dmitry Baryshkov
-1 siblings, 0 replies; 6+ messages in thread
From: Dmitry Baryshkov @ 2021-11-24 19:45 UTC (permalink / raw)
To: Kuogee Hsieh, robdclark, sean, swboyd, vkoul, daniel, airlied,
agross, bjorn.andersson
Cc: quic_abhinavk, aravindh, freedreno, dri-devel, linux-arm-msm,
linux-kernel
On 15/11/2021 21:48, Kuogee Hsieh wrote:
> Currently the msm_dp_*** functions implement the same sequence which would
> happen when drm_bridge is used. hence get rid of this intermediate layer
> and align with the drm_bridge usage to avoid customized implementation.
>
> Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
>
> Changes in v2:
> -- revise commit text
> -- rename dp_bridge to msm_dp_bridge
> -- delete empty functions
>
> Changes in 3:
> -- replace kzalloc() with devm_kzalloc()
> -- replace __dp_display_enable() with dp_display_enable()
> -- replace __dp_display_disable() with dp_display_disable()
> ---
> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 21 -------
> drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 7 +++
> drivers/gpu/drm/msm/dp/dp_display.c | 4 +-
> drivers/gpu/drm/msm/dp/dp_display.h | 1 +
> drivers/gpu/drm/msm/dp/dp_drm.c | 91 +++++++++++++++++++++++++++++
> drivers/gpu/drm/msm/msm_drv.h | 16 +++--
> 6 files changed, 113 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index 31050aa..c4e08c4 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -1003,9 +1003,6 @@ static void dpu_encoder_virt_mode_set(struct drm_encoder *drm_enc,
>
> trace_dpu_enc_mode_set(DRMID(drm_enc));
>
> - if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS)
> - msm_dp_display_mode_set(dpu_enc->dp, drm_enc, mode, adj_mode);
> -
> list_for_each_entry(conn_iter, connector_list, head)
> if (conn_iter->encoder == drm_enc)
> conn = conn_iter;
> @@ -1181,14 +1178,6 @@ static void dpu_encoder_virt_enable(struct drm_encoder *drm_enc)
>
> _dpu_encoder_virt_enable_helper(drm_enc);
>
> - if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
> - ret = msm_dp_display_enable(dpu_enc->dp, drm_enc);
> - if (ret) {
> - DPU_ERROR_ENC(dpu_enc, "dp display enable failed: %d\n",
> - ret);
> - goto out;
> - }
> - }
> dpu_enc->enabled = true;
>
> out:
> @@ -1214,11 +1203,6 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
> /* wait for idle */
> dpu_encoder_wait_for_event(drm_enc, MSM_ENC_TX_COMPLETE);
>
> - if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
> - if (msm_dp_display_pre_disable(dpu_enc->dp, drm_enc))
> - DPU_ERROR_ENC(dpu_enc, "dp display push idle failed\n");
> - }
> -
> dpu_encoder_resource_control(drm_enc, DPU_ENC_RC_EVENT_PRE_STOP);
>
> for (i = 0; i < dpu_enc->num_phys_encs; i++) {
> @@ -1243,11 +1227,6 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
>
> DPU_DEBUG_ENC(dpu_enc, "encoder disabled\n");
>
> - if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
> - if (msm_dp_display_disable(dpu_enc->dp, drm_enc))
> - DPU_ERROR_ENC(dpu_enc, "dp display disable failed\n");
> - }
> -
> mutex_unlock(&dpu_enc->enc_lock);
> }
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> index 27d98b5..d16337f 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> @@ -557,6 +557,13 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev,
> encoder->base.id, rc);
> return rc;
> }
> +
> + rc = msm_dp_bridge_init(priv->dp[i], dev, encoder);
> + if (rc) {
> + DPU_ERROR("failed to setup DPU bridge %d: rc:%d\n",
> + encoder->base.id, rc);
> + return rc;
> + }
There is no need to teach DPU driver about all the gory details of DP
internals. Move this call to the msm_dp_modeset_init().
> }
>
> return rc;
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index 2f113ff..51770a4 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -1674,8 +1674,8 @@ int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
> }
>
> void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
> - struct drm_display_mode *mode,
> - struct drm_display_mode *adjusted_mode)
> + const struct drm_display_mode *mode,
> + const struct drm_display_mode *adjusted_mode)
> {
> struct dp_display_private *dp_display;
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
> index 76f45f9..2237e80 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.h
> +++ b/drivers/gpu/drm/msm/dp/dp_display.h
> @@ -13,6 +13,7 @@
> struct msm_dp {
> struct drm_device *drm_dev;
> struct device *codec_dev;
> + struct drm_bridge *bridge;
> struct drm_connector *connector;
> struct drm_encoder *encoder;
> struct drm_panel *drm_panel;
> diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
> index f33e315..b341f1f 100644
> --- a/drivers/gpu/drm/msm/dp/dp_drm.c
> +++ b/drivers/gpu/drm/msm/dp/dp_drm.c
> @@ -5,12 +5,21 @@
>
> #include <drm/drm_atomic_helper.h>
> #include <drm/drm_atomic.h>
> +#include <drm/drm_bridge.h>
> #include <drm/drm_crtc.h>
>
> #include "msm_drv.h"
> #include "msm_kms.h"
> #include "dp_drm.h"
>
> +
> +struct msm_dp_bridge {
> + struct drm_bridge bridge;
> + struct msm_dp *dp_display;
> +};
> +
> +#define to_dp_display(x) container_of((x), struct msm_dp_bridge, bridge)
> +
> struct dp_connector {
> struct drm_connector base;
> struct msm_dp *dp_display;
> @@ -162,3 +171,85 @@ struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display)
>
> return connector;
> }
> +
> +static int dp_bridge_attach(struct drm_bridge *drm_bridge,
> + enum drm_bridge_attach_flags flags)
> +{
> + return 0;
> +}
As far as I see from drm_bridge_attach() there is no need to provide
stubs for attach callback. Please drop it.
> +
> +static void dp_bridge_mode_set(struct drm_bridge *drm_bridge,
> + const struct drm_display_mode *mode,
> + const struct drm_display_mode *adjusted_mode)
> +{
> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
> + struct msm_dp *dp_display = dp_bridge->dp_display;
> +
> + msm_dp_display_mode_set(dp_display, drm_bridge->encoder, mode, adjusted_mode);
> +}
> +
> +static void dp_bridge_enable(struct drm_bridge *drm_bridge)
> +{
> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
> + struct msm_dp *dp_display = dp_bridge->dp_display;
> +
> + msm_dp_display_enable(dp_display, drm_bridge->encoder);
> +}
> +
> +static void dp_bridge_disable(struct drm_bridge *drm_bridge)
> +{
> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
> + struct msm_dp *dp_display = dp_bridge->dp_display;
> +
> + msm_dp_display_pre_disable(dp_display, drm_bridge->encoder);
> +}
> +
> +static void dp_bridge_post_disable(struct drm_bridge *drm_bridge)
> +{
> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
> + struct msm_dp *dp_display = dp_bridge->dp_display;
> +
> + msm_dp_display_disable(dp_display, drm_bridge->encoder);
> +}
> +
> +static const struct drm_bridge_funcs dp_bridge_ops = {
> + .attach = dp_bridge_attach,
> + .mode_fixup = NULL,
> + .pre_enable = NULL,
No need to initialize fields to default values (NULL). Drop these two
please.
> + .enable = dp_bridge_enable,
> + .disable = dp_bridge_disable,
> + .post_disable = dp_bridge_post_disable,
> + .mode_set = dp_bridge_mode_set,
> +};
> +
> +int msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev,
> + struct drm_encoder *encoder)
> +{
> + int rc;
> + struct msm_drm_private *priv;
> + struct msm_dp_bridge *dp_bridge;
> + struct drm_bridge *bridge;
> +
> + dp_bridge = devm_kzalloc(dev->dev, sizeof(*dp_bridge), GFP_KERNEL);
> + if (!dp_bridge)
> + return -ENOMEM;
> +
> + dp_bridge->dp_display = dp_display;
> +
> + bridge = &dp_bridge->bridge;
> + bridge->funcs = &dp_bridge_ops;
> + bridge->encoder = encoder;
> +
> + rc = drm_bridge_attach(encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);
> + if (rc) {
> + DRM_ERROR("failed to attach bridge, rc=%d\n", rc);
> + kfree(dp_bridge);
> + return rc;
> + }
> +
> + priv = dev->dev_private;
> + priv->bridges[priv->num_bridges++] = bridge;
> + dp_display->bridge = bridge;
> +
> + return 0;
> +} > diff --git a/drivers/gpu/drm/msm/msm_drv.h
b/drivers/gpu/drm/msm/msm_drv.h
> index 4bb797e..9a2092f 100644
> --- a/drivers/gpu/drm/msm/msm_drv.h
> +++ b/drivers/gpu/drm/msm/msm_drv.h
> @@ -388,8 +388,10 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder);
> int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder);
> int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder);
> void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
> - struct drm_display_mode *mode,
> - struct drm_display_mode *adjusted_mode);
> + const struct drm_display_mode *mode,
> + const struct drm_display_mode *adjusted_mode);
> +int msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev,
> + struct drm_encoder *encoder);
> void msm_dp_irq_postinstall(struct msm_dp *dp_display);
> void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp_display);
>
> @@ -426,10 +428,16 @@ static inline int msm_dp_display_pre_disable(struct msm_dp *dp,
> }
> static inline void msm_dp_display_mode_set(struct msm_dp *dp,
> struct drm_encoder *encoder,
> - struct drm_display_mode *mode,
> - struct drm_display_mode *adjusted_mode)
> + const struct drm_display_mode *mode,
> + const struct drm_display_mode *adjusted_mode)
> {
> }
> +static inline int msm_dp_bridge_init(struct msm_dp *dp_display,
> + struct drm_device *dev,
> + struct drm_encoder *encoder)
> +{
> + return -EINVAL;
> +}
If msm_dp_bridge_init() becomes DP-internal function, this is unnecessary.
>
> static inline void msm_dp_irq_postinstall(struct msm_dp *dp_display)
> {
>
--
With best wishes
Dmitry
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v3] drm/msm/dp: employ bridge mechanism for display enable and disable
@ 2021-11-24 19:45 ` Dmitry Baryshkov
0 siblings, 0 replies; 6+ messages in thread
From: Dmitry Baryshkov @ 2021-11-24 19:45 UTC (permalink / raw)
To: Kuogee Hsieh, robdclark, sean, swboyd, vkoul, daniel, airlied,
agross, bjorn.andersson
Cc: linux-arm-msm, quic_abhinavk, dri-devel, linux-kernel, aravindh,
freedreno
On 15/11/2021 21:48, Kuogee Hsieh wrote:
> Currently the msm_dp_*** functions implement the same sequence which would
> happen when drm_bridge is used. hence get rid of this intermediate layer
> and align with the drm_bridge usage to avoid customized implementation.
>
> Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
>
> Changes in v2:
> -- revise commit text
> -- rename dp_bridge to msm_dp_bridge
> -- delete empty functions
>
> Changes in 3:
> -- replace kzalloc() with devm_kzalloc()
> -- replace __dp_display_enable() with dp_display_enable()
> -- replace __dp_display_disable() with dp_display_disable()
> ---
> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 21 -------
> drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 7 +++
> drivers/gpu/drm/msm/dp/dp_display.c | 4 +-
> drivers/gpu/drm/msm/dp/dp_display.h | 1 +
> drivers/gpu/drm/msm/dp/dp_drm.c | 91 +++++++++++++++++++++++++++++
> drivers/gpu/drm/msm/msm_drv.h | 16 +++--
> 6 files changed, 113 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index 31050aa..c4e08c4 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -1003,9 +1003,6 @@ static void dpu_encoder_virt_mode_set(struct drm_encoder *drm_enc,
>
> trace_dpu_enc_mode_set(DRMID(drm_enc));
>
> - if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS)
> - msm_dp_display_mode_set(dpu_enc->dp, drm_enc, mode, adj_mode);
> -
> list_for_each_entry(conn_iter, connector_list, head)
> if (conn_iter->encoder == drm_enc)
> conn = conn_iter;
> @@ -1181,14 +1178,6 @@ static void dpu_encoder_virt_enable(struct drm_encoder *drm_enc)
>
> _dpu_encoder_virt_enable_helper(drm_enc);
>
> - if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
> - ret = msm_dp_display_enable(dpu_enc->dp, drm_enc);
> - if (ret) {
> - DPU_ERROR_ENC(dpu_enc, "dp display enable failed: %d\n",
> - ret);
> - goto out;
> - }
> - }
> dpu_enc->enabled = true;
>
> out:
> @@ -1214,11 +1203,6 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
> /* wait for idle */
> dpu_encoder_wait_for_event(drm_enc, MSM_ENC_TX_COMPLETE);
>
> - if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
> - if (msm_dp_display_pre_disable(dpu_enc->dp, drm_enc))
> - DPU_ERROR_ENC(dpu_enc, "dp display push idle failed\n");
> - }
> -
> dpu_encoder_resource_control(drm_enc, DPU_ENC_RC_EVENT_PRE_STOP);
>
> for (i = 0; i < dpu_enc->num_phys_encs; i++) {
> @@ -1243,11 +1227,6 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
>
> DPU_DEBUG_ENC(dpu_enc, "encoder disabled\n");
>
> - if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
> - if (msm_dp_display_disable(dpu_enc->dp, drm_enc))
> - DPU_ERROR_ENC(dpu_enc, "dp display disable failed\n");
> - }
> -
> mutex_unlock(&dpu_enc->enc_lock);
> }
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> index 27d98b5..d16337f 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> @@ -557,6 +557,13 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev,
> encoder->base.id, rc);
> return rc;
> }
> +
> + rc = msm_dp_bridge_init(priv->dp[i], dev, encoder);
> + if (rc) {
> + DPU_ERROR("failed to setup DPU bridge %d: rc:%d\n",
> + encoder->base.id, rc);
> + return rc;
> + }
There is no need to teach DPU driver about all the gory details of DP
internals. Move this call to the msm_dp_modeset_init().
> }
>
> return rc;
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index 2f113ff..51770a4 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -1674,8 +1674,8 @@ int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder)
> }
>
> void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
> - struct drm_display_mode *mode,
> - struct drm_display_mode *adjusted_mode)
> + const struct drm_display_mode *mode,
> + const struct drm_display_mode *adjusted_mode)
> {
> struct dp_display_private *dp_display;
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
> index 76f45f9..2237e80 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.h
> +++ b/drivers/gpu/drm/msm/dp/dp_display.h
> @@ -13,6 +13,7 @@
> struct msm_dp {
> struct drm_device *drm_dev;
> struct device *codec_dev;
> + struct drm_bridge *bridge;
> struct drm_connector *connector;
> struct drm_encoder *encoder;
> struct drm_panel *drm_panel;
> diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
> index f33e315..b341f1f 100644
> --- a/drivers/gpu/drm/msm/dp/dp_drm.c
> +++ b/drivers/gpu/drm/msm/dp/dp_drm.c
> @@ -5,12 +5,21 @@
>
> #include <drm/drm_atomic_helper.h>
> #include <drm/drm_atomic.h>
> +#include <drm/drm_bridge.h>
> #include <drm/drm_crtc.h>
>
> #include "msm_drv.h"
> #include "msm_kms.h"
> #include "dp_drm.h"
>
> +
> +struct msm_dp_bridge {
> + struct drm_bridge bridge;
> + struct msm_dp *dp_display;
> +};
> +
> +#define to_dp_display(x) container_of((x), struct msm_dp_bridge, bridge)
> +
> struct dp_connector {
> struct drm_connector base;
> struct msm_dp *dp_display;
> @@ -162,3 +171,85 @@ struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display)
>
> return connector;
> }
> +
> +static int dp_bridge_attach(struct drm_bridge *drm_bridge,
> + enum drm_bridge_attach_flags flags)
> +{
> + return 0;
> +}
As far as I see from drm_bridge_attach() there is no need to provide
stubs for attach callback. Please drop it.
> +
> +static void dp_bridge_mode_set(struct drm_bridge *drm_bridge,
> + const struct drm_display_mode *mode,
> + const struct drm_display_mode *adjusted_mode)
> +{
> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
> + struct msm_dp *dp_display = dp_bridge->dp_display;
> +
> + msm_dp_display_mode_set(dp_display, drm_bridge->encoder, mode, adjusted_mode);
> +}
> +
> +static void dp_bridge_enable(struct drm_bridge *drm_bridge)
> +{
> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
> + struct msm_dp *dp_display = dp_bridge->dp_display;
> +
> + msm_dp_display_enable(dp_display, drm_bridge->encoder);
> +}
> +
> +static void dp_bridge_disable(struct drm_bridge *drm_bridge)
> +{
> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
> + struct msm_dp *dp_display = dp_bridge->dp_display;
> +
> + msm_dp_display_pre_disable(dp_display, drm_bridge->encoder);
> +}
> +
> +static void dp_bridge_post_disable(struct drm_bridge *drm_bridge)
> +{
> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
> + struct msm_dp *dp_display = dp_bridge->dp_display;
> +
> + msm_dp_display_disable(dp_display, drm_bridge->encoder);
> +}
> +
> +static const struct drm_bridge_funcs dp_bridge_ops = {
> + .attach = dp_bridge_attach,
> + .mode_fixup = NULL,
> + .pre_enable = NULL,
No need to initialize fields to default values (NULL). Drop these two
please.
> + .enable = dp_bridge_enable,
> + .disable = dp_bridge_disable,
> + .post_disable = dp_bridge_post_disable,
> + .mode_set = dp_bridge_mode_set,
> +};
> +
> +int msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev,
> + struct drm_encoder *encoder)
> +{
> + int rc;
> + struct msm_drm_private *priv;
> + struct msm_dp_bridge *dp_bridge;
> + struct drm_bridge *bridge;
> +
> + dp_bridge = devm_kzalloc(dev->dev, sizeof(*dp_bridge), GFP_KERNEL);
> + if (!dp_bridge)
> + return -ENOMEM;
> +
> + dp_bridge->dp_display = dp_display;
> +
> + bridge = &dp_bridge->bridge;
> + bridge->funcs = &dp_bridge_ops;
> + bridge->encoder = encoder;
> +
> + rc = drm_bridge_attach(encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);
> + if (rc) {
> + DRM_ERROR("failed to attach bridge, rc=%d\n", rc);
> + kfree(dp_bridge);
> + return rc;
> + }
> +
> + priv = dev->dev_private;
> + priv->bridges[priv->num_bridges++] = bridge;
> + dp_display->bridge = bridge;
> +
> + return 0;
> +} > diff --git a/drivers/gpu/drm/msm/msm_drv.h
b/drivers/gpu/drm/msm/msm_drv.h
> index 4bb797e..9a2092f 100644
> --- a/drivers/gpu/drm/msm/msm_drv.h
> +++ b/drivers/gpu/drm/msm/msm_drv.h
> @@ -388,8 +388,10 @@ int msm_dp_display_enable(struct msm_dp *dp, struct drm_encoder *encoder);
> int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder *encoder);
> int msm_dp_display_pre_disable(struct msm_dp *dp, struct drm_encoder *encoder);
> void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
> - struct drm_display_mode *mode,
> - struct drm_display_mode *adjusted_mode);
> + const struct drm_display_mode *mode,
> + const struct drm_display_mode *adjusted_mode);
> +int msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev,
> + struct drm_encoder *encoder);
> void msm_dp_irq_postinstall(struct msm_dp *dp_display);
> void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp_display);
>
> @@ -426,10 +428,16 @@ static inline int msm_dp_display_pre_disable(struct msm_dp *dp,
> }
> static inline void msm_dp_display_mode_set(struct msm_dp *dp,
> struct drm_encoder *encoder,
> - struct drm_display_mode *mode,
> - struct drm_display_mode *adjusted_mode)
> + const struct drm_display_mode *mode,
> + const struct drm_display_mode *adjusted_mode)
> {
> }
> +static inline int msm_dp_bridge_init(struct msm_dp *dp_display,
> + struct drm_device *dev,
> + struct drm_encoder *encoder)
> +{
> + return -EINVAL;
> +}
If msm_dp_bridge_init() becomes DP-internal function, this is unnecessary.
>
> static inline void msm_dp_irq_postinstall(struct msm_dp *dp_display)
> {
>
--
With best wishes
Dmitry
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v3] drm/msm/dp: employ bridge mechanism for display enable and disable
2021-11-24 19:45 ` Dmitry Baryshkov
@ 2021-11-29 16:57 ` Kuogee Hsieh
-1 siblings, 0 replies; 6+ messages in thread
From: Kuogee Hsieh @ 2021-11-29 16:57 UTC (permalink / raw)
To: Dmitry Baryshkov, robdclark, sean, swboyd, vkoul, daniel,
airlied, agross, bjorn.andersson
Cc: linux-arm-msm, quic_abhinavk, dri-devel, linux-kernel, aravindh,
freedreno
On 11/24/2021 11:45 AM, Dmitry Baryshkov wrote:
> On 15/11/2021 21:48, Kuogee Hsieh wrote:
>> Currently the msm_dp_*** functions implement the same sequence which
>> would
>> happen when drm_bridge is used. hence get rid of this intermediate layer
>> and align with the drm_bridge usage to avoid customized implementation.
>>
>> Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
>>
>> Changes in v2:
>> -- revise commit text
>> -- rename dp_bridge to msm_dp_bridge
>> -- delete empty functions
>>
>> Changes in 3:
>> -- replace kzalloc() with devm_kzalloc()
>> -- replace __dp_display_enable() with dp_display_enable()
>> -- replace __dp_display_disable() with dp_display_disable()
>> ---
>> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 21 -------
>> drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 7 +++
>> drivers/gpu/drm/msm/dp/dp_display.c | 4 +-
>> drivers/gpu/drm/msm/dp/dp_display.h | 1 +
>> drivers/gpu/drm/msm/dp/dp_drm.c | 91
>> +++++++++++++++++++++++++++++
>> drivers/gpu/drm/msm/msm_drv.h | 16 +++--
>> 6 files changed, 113 insertions(+), 27 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> index 31050aa..c4e08c4 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> @@ -1003,9 +1003,6 @@ static void dpu_encoder_virt_mode_set(struct
>> drm_encoder *drm_enc,
>> trace_dpu_enc_mode_set(DRMID(drm_enc));
>> - if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS)
>> - msm_dp_display_mode_set(dpu_enc->dp, drm_enc, mode, adj_mode);
>> -
>> list_for_each_entry(conn_iter, connector_list, head)
>> if (conn_iter->encoder == drm_enc)
>> conn = conn_iter;
>> @@ -1181,14 +1178,6 @@ static void dpu_encoder_virt_enable(struct
>> drm_encoder *drm_enc)
>> _dpu_encoder_virt_enable_helper(drm_enc);
>> - if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
>> - ret = msm_dp_display_enable(dpu_enc->dp, drm_enc);
>> - if (ret) {
>> - DPU_ERROR_ENC(dpu_enc, "dp display enable failed: %d\n",
>> - ret);
>> - goto out;
>> - }
>> - }
>> dpu_enc->enabled = true;
>> out:
>> @@ -1214,11 +1203,6 @@ static void dpu_encoder_virt_disable(struct
>> drm_encoder *drm_enc)
>> /* wait for idle */
>> dpu_encoder_wait_for_event(drm_enc, MSM_ENC_TX_COMPLETE);
>> - if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
>> - if (msm_dp_display_pre_disable(dpu_enc->dp, drm_enc))
>> - DPU_ERROR_ENC(dpu_enc, "dp display push idle failed\n");
>> - }
>> -
>> dpu_encoder_resource_control(drm_enc, DPU_ENC_RC_EVENT_PRE_STOP);
>> for (i = 0; i < dpu_enc->num_phys_encs; i++) {
>> @@ -1243,11 +1227,6 @@ static void dpu_encoder_virt_disable(struct
>> drm_encoder *drm_enc)
>> DPU_DEBUG_ENC(dpu_enc, "encoder disabled\n");
>> - if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
>> - if (msm_dp_display_disable(dpu_enc->dp, drm_enc))
>> - DPU_ERROR_ENC(dpu_enc, "dp display disable failed\n");
>> - }
>> -
>> mutex_unlock(&dpu_enc->enc_lock);
>> }
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
>> index 27d98b5..d16337f 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
>> @@ -557,6 +557,13 @@ static int
>> _dpu_kms_initialize_displayport(struct drm_device *dev,
>> encoder->base.id, rc);
>> return rc;
>> }
>> +
>> + rc = msm_dp_bridge_init(priv->dp[i], dev, encoder);
>> + if (rc) {
>> + DPU_ERROR("failed to setup DPU bridge %d: rc:%d\n",
>> + encoder->base.id, rc);
>> + return rc;
>> + }
>
> There is no need to teach DPU driver about all the gory details of DP
> internals. Move this call to the msm_dp_modeset_init().
This has been done at v4.
I will submit v5 to address other commands.
>
>> }
>> return rc;
>> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c
>> b/drivers/gpu/drm/msm/dp/dp_display.c
>> index 2f113ff..51770a4 100644
>> --- a/drivers/gpu/drm/msm/dp/dp_display.c
>> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
>> @@ -1674,8 +1674,8 @@ int msm_dp_display_disable(struct msm_dp *dp,
>> struct drm_encoder *encoder)
>> }
>> void msm_dp_display_mode_set(struct msm_dp *dp, struct
>> drm_encoder *encoder,
>> - struct drm_display_mode *mode,
>> - struct drm_display_mode *adjusted_mode)
>> + const struct drm_display_mode *mode,
>> + const struct drm_display_mode *adjusted_mode)
>> {
>> struct dp_display_private *dp_display;
>> diff --git a/drivers/gpu/drm/msm/dp/dp_display.h
>> b/drivers/gpu/drm/msm/dp/dp_display.h
>> index 76f45f9..2237e80 100644
>> --- a/drivers/gpu/drm/msm/dp/dp_display.h
>> +++ b/drivers/gpu/drm/msm/dp/dp_display.h
>> @@ -13,6 +13,7 @@
>> struct msm_dp {
>> struct drm_device *drm_dev;
>> struct device *codec_dev;
>> + struct drm_bridge *bridge;
>> struct drm_connector *connector;
>> struct drm_encoder *encoder;
>> struct drm_panel *drm_panel;
>> diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c
>> b/drivers/gpu/drm/msm/dp/dp_drm.c
>> index f33e315..b341f1f 100644
>> --- a/drivers/gpu/drm/msm/dp/dp_drm.c
>> +++ b/drivers/gpu/drm/msm/dp/dp_drm.c
>> @@ -5,12 +5,21 @@
>> #include <drm/drm_atomic_helper.h>
>> #include <drm/drm_atomic.h>
>> +#include <drm/drm_bridge.h>
>> #include <drm/drm_crtc.h>
>> #include "msm_drv.h"
>> #include "msm_kms.h"
>> #include "dp_drm.h"
>> +
>> +struct msm_dp_bridge {
>> + struct drm_bridge bridge;
>> + struct msm_dp *dp_display;
>> +};
>> +
>> +#define to_dp_display(x) container_of((x), struct msm_dp_bridge,
>> bridge)
>> +
>> struct dp_connector {
>> struct drm_connector base;
>> struct msm_dp *dp_display;
>> @@ -162,3 +171,85 @@ struct drm_connector
>> *dp_drm_connector_init(struct msm_dp *dp_display)
>> return connector;
>> }
>> +
>> +static int dp_bridge_attach(struct drm_bridge *drm_bridge,
>> + enum drm_bridge_attach_flags flags)
>> +{
>> + return 0;
>> +}
>
> As far as I see from drm_bridge_attach() there is no need to provide
> stubs for attach callback. Please drop it.
>
>> +
>> +static void dp_bridge_mode_set(struct drm_bridge *drm_bridge,
>> + const struct drm_display_mode *mode,
>> + const struct drm_display_mode *adjusted_mode)
>> +{
>> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
>> + struct msm_dp *dp_display = dp_bridge->dp_display;
>> +
>> + msm_dp_display_mode_set(dp_display, drm_bridge->encoder, mode,
>> adjusted_mode);
>> +}
>> +
>> +static void dp_bridge_enable(struct drm_bridge *drm_bridge)
>> +{
>> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
>> + struct msm_dp *dp_display = dp_bridge->dp_display;
>> +
>> + msm_dp_display_enable(dp_display, drm_bridge->encoder);
>> +}
>> +
>> +static void dp_bridge_disable(struct drm_bridge *drm_bridge)
>> +{
>> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
>> + struct msm_dp *dp_display = dp_bridge->dp_display;
>> +
>> + msm_dp_display_pre_disable(dp_display, drm_bridge->encoder);
>> +}
>> +
>> +static void dp_bridge_post_disable(struct drm_bridge *drm_bridge)
>> +{
>> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
>> + struct msm_dp *dp_display = dp_bridge->dp_display;
>> +
>> + msm_dp_display_disable(dp_display, drm_bridge->encoder);
>> +}
>> +
>> +static const struct drm_bridge_funcs dp_bridge_ops = {
>> + .attach = dp_bridge_attach,
>> + .mode_fixup = NULL,
>> + .pre_enable = NULL,
>
> No need to initialize fields to default values (NULL). Drop these two
> please.
>
>> + .enable = dp_bridge_enable,
>> + .disable = dp_bridge_disable,
>> + .post_disable = dp_bridge_post_disable,
>> + .mode_set = dp_bridge_mode_set,
>> +};
>> +
>> +int msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_device
>> *dev,
>> + struct drm_encoder *encoder)
>> +{
>> + int rc;
>> + struct msm_drm_private *priv;
>> + struct msm_dp_bridge *dp_bridge;
>> + struct drm_bridge *bridge;
>> +
>> + dp_bridge = devm_kzalloc(dev->dev, sizeof(*dp_bridge), GFP_KERNEL);
>> + if (!dp_bridge)
>> + return -ENOMEM;
>> +
>> + dp_bridge->dp_display = dp_display;
>> +
>> + bridge = &dp_bridge->bridge;
>> + bridge->funcs = &dp_bridge_ops;
>> + bridge->encoder = encoder;
>> +
>> + rc = drm_bridge_attach(encoder, bridge, NULL,
>> DRM_BRIDGE_ATTACH_NO_CONNECTOR);
>> + if (rc) {
>> + DRM_ERROR("failed to attach bridge, rc=%d\n", rc);
>> + kfree(dp_bridge);
>> + return rc;
>> + }
>> +
>> + priv = dev->dev_private;
>> + priv->bridges[priv->num_bridges++] = bridge;
>> + dp_display->bridge = bridge;
>> +
>> + return 0;
>> +} > diff --git a/drivers/gpu/drm/msm/msm_drv.h
> b/drivers/gpu/drm/msm/msm_drv.h
>> index 4bb797e..9a2092f 100644
>> --- a/drivers/gpu/drm/msm/msm_drv.h
>> +++ b/drivers/gpu/drm/msm/msm_drv.h
>> @@ -388,8 +388,10 @@ int msm_dp_display_enable(struct msm_dp *dp,
>> struct drm_encoder *encoder);
>> int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder
>> *encoder);
>> int msm_dp_display_pre_disable(struct msm_dp *dp, struct
>> drm_encoder *encoder);
>> void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder
>> *encoder,
>> - struct drm_display_mode *mode,
>> - struct drm_display_mode *adjusted_mode);
>> + const struct drm_display_mode *mode,
>> + const struct drm_display_mode *adjusted_mode);
>> +int msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_device
>> *dev,
>> + struct drm_encoder *encoder);
>> void msm_dp_irq_postinstall(struct msm_dp *dp_display);
>> void msm_dp_snapshot(struct msm_disp_state *disp_state, struct
>> msm_dp *dp_display);
>> @@ -426,10 +428,16 @@ static inline int
>> msm_dp_display_pre_disable(struct msm_dp *dp,
>> }
>> static inline void msm_dp_display_mode_set(struct msm_dp *dp,
>> struct drm_encoder *encoder,
>> - struct drm_display_mode *mode,
>> - struct drm_display_mode *adjusted_mode)
>> + const struct drm_display_mode *mode,
>> + const struct drm_display_mode *adjusted_mode)
>> {
>> }
>> +static inline int msm_dp_bridge_init(struct msm_dp *dp_display,
>> + struct drm_device *dev,
>> + struct drm_encoder *encoder)
>> +{
>> + return -EINVAL;
>> +}
>
> If msm_dp_bridge_init() becomes DP-internal function, this is
> unnecessary.
>
>> static inline void msm_dp_irq_postinstall(struct msm_dp *dp_display)
>> {
>>
>
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH v3] drm/msm/dp: employ bridge mechanism for display enable and disable
@ 2021-11-29 16:57 ` Kuogee Hsieh
0 siblings, 0 replies; 6+ messages in thread
From: Kuogee Hsieh @ 2021-11-29 16:57 UTC (permalink / raw)
To: Dmitry Baryshkov, robdclark, sean, swboyd, vkoul, daniel,
airlied, agross, bjorn.andersson
Cc: quic_abhinavk, aravindh, freedreno, dri-devel, linux-arm-msm,
linux-kernel
On 11/24/2021 11:45 AM, Dmitry Baryshkov wrote:
> On 15/11/2021 21:48, Kuogee Hsieh wrote:
>> Currently the msm_dp_*** functions implement the same sequence which
>> would
>> happen when drm_bridge is used. hence get rid of this intermediate layer
>> and align with the drm_bridge usage to avoid customized implementation.
>>
>> Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
>>
>> Changes in v2:
>> -- revise commit text
>> -- rename dp_bridge to msm_dp_bridge
>> -- delete empty functions
>>
>> Changes in 3:
>> -- replace kzalloc() with devm_kzalloc()
>> -- replace __dp_display_enable() with dp_display_enable()
>> -- replace __dp_display_disable() with dp_display_disable()
>> ---
>> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 21 -------
>> drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 7 +++
>> drivers/gpu/drm/msm/dp/dp_display.c | 4 +-
>> drivers/gpu/drm/msm/dp/dp_display.h | 1 +
>> drivers/gpu/drm/msm/dp/dp_drm.c | 91
>> +++++++++++++++++++++++++++++
>> drivers/gpu/drm/msm/msm_drv.h | 16 +++--
>> 6 files changed, 113 insertions(+), 27 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> index 31050aa..c4e08c4 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
>> @@ -1003,9 +1003,6 @@ static void dpu_encoder_virt_mode_set(struct
>> drm_encoder *drm_enc,
>> trace_dpu_enc_mode_set(DRMID(drm_enc));
>> - if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS)
>> - msm_dp_display_mode_set(dpu_enc->dp, drm_enc, mode, adj_mode);
>> -
>> list_for_each_entry(conn_iter, connector_list, head)
>> if (conn_iter->encoder == drm_enc)
>> conn = conn_iter;
>> @@ -1181,14 +1178,6 @@ static void dpu_encoder_virt_enable(struct
>> drm_encoder *drm_enc)
>> _dpu_encoder_virt_enable_helper(drm_enc);
>> - if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
>> - ret = msm_dp_display_enable(dpu_enc->dp, drm_enc);
>> - if (ret) {
>> - DPU_ERROR_ENC(dpu_enc, "dp display enable failed: %d\n",
>> - ret);
>> - goto out;
>> - }
>> - }
>> dpu_enc->enabled = true;
>> out:
>> @@ -1214,11 +1203,6 @@ static void dpu_encoder_virt_disable(struct
>> drm_encoder *drm_enc)
>> /* wait for idle */
>> dpu_encoder_wait_for_event(drm_enc, MSM_ENC_TX_COMPLETE);
>> - if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
>> - if (msm_dp_display_pre_disable(dpu_enc->dp, drm_enc))
>> - DPU_ERROR_ENC(dpu_enc, "dp display push idle failed\n");
>> - }
>> -
>> dpu_encoder_resource_control(drm_enc, DPU_ENC_RC_EVENT_PRE_STOP);
>> for (i = 0; i < dpu_enc->num_phys_encs; i++) {
>> @@ -1243,11 +1227,6 @@ static void dpu_encoder_virt_disable(struct
>> drm_encoder *drm_enc)
>> DPU_DEBUG_ENC(dpu_enc, "encoder disabled\n");
>> - if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS) {
>> - if (msm_dp_display_disable(dpu_enc->dp, drm_enc))
>> - DPU_ERROR_ENC(dpu_enc, "dp display disable failed\n");
>> - }
>> -
>> mutex_unlock(&dpu_enc->enc_lock);
>> }
>> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
>> b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
>> index 27d98b5..d16337f 100644
>> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
>> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
>> @@ -557,6 +557,13 @@ static int
>> _dpu_kms_initialize_displayport(struct drm_device *dev,
>> encoder->base.id, rc);
>> return rc;
>> }
>> +
>> + rc = msm_dp_bridge_init(priv->dp[i], dev, encoder);
>> + if (rc) {
>> + DPU_ERROR("failed to setup DPU bridge %d: rc:%d\n",
>> + encoder->base.id, rc);
>> + return rc;
>> + }
>
> There is no need to teach DPU driver about all the gory details of DP
> internals. Move this call to the msm_dp_modeset_init().
This has been done at v4.
I will submit v5 to address other commands.
>
>> }
>> return rc;
>> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c
>> b/drivers/gpu/drm/msm/dp/dp_display.c
>> index 2f113ff..51770a4 100644
>> --- a/drivers/gpu/drm/msm/dp/dp_display.c
>> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
>> @@ -1674,8 +1674,8 @@ int msm_dp_display_disable(struct msm_dp *dp,
>> struct drm_encoder *encoder)
>> }
>> void msm_dp_display_mode_set(struct msm_dp *dp, struct
>> drm_encoder *encoder,
>> - struct drm_display_mode *mode,
>> - struct drm_display_mode *adjusted_mode)
>> + const struct drm_display_mode *mode,
>> + const struct drm_display_mode *adjusted_mode)
>> {
>> struct dp_display_private *dp_display;
>> diff --git a/drivers/gpu/drm/msm/dp/dp_display.h
>> b/drivers/gpu/drm/msm/dp/dp_display.h
>> index 76f45f9..2237e80 100644
>> --- a/drivers/gpu/drm/msm/dp/dp_display.h
>> +++ b/drivers/gpu/drm/msm/dp/dp_display.h
>> @@ -13,6 +13,7 @@
>> struct msm_dp {
>> struct drm_device *drm_dev;
>> struct device *codec_dev;
>> + struct drm_bridge *bridge;
>> struct drm_connector *connector;
>> struct drm_encoder *encoder;
>> struct drm_panel *drm_panel;
>> diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c
>> b/drivers/gpu/drm/msm/dp/dp_drm.c
>> index f33e315..b341f1f 100644
>> --- a/drivers/gpu/drm/msm/dp/dp_drm.c
>> +++ b/drivers/gpu/drm/msm/dp/dp_drm.c
>> @@ -5,12 +5,21 @@
>> #include <drm/drm_atomic_helper.h>
>> #include <drm/drm_atomic.h>
>> +#include <drm/drm_bridge.h>
>> #include <drm/drm_crtc.h>
>> #include "msm_drv.h"
>> #include "msm_kms.h"
>> #include "dp_drm.h"
>> +
>> +struct msm_dp_bridge {
>> + struct drm_bridge bridge;
>> + struct msm_dp *dp_display;
>> +};
>> +
>> +#define to_dp_display(x) container_of((x), struct msm_dp_bridge,
>> bridge)
>> +
>> struct dp_connector {
>> struct drm_connector base;
>> struct msm_dp *dp_display;
>> @@ -162,3 +171,85 @@ struct drm_connector
>> *dp_drm_connector_init(struct msm_dp *dp_display)
>> return connector;
>> }
>> +
>> +static int dp_bridge_attach(struct drm_bridge *drm_bridge,
>> + enum drm_bridge_attach_flags flags)
>> +{
>> + return 0;
>> +}
>
> As far as I see from drm_bridge_attach() there is no need to provide
> stubs for attach callback. Please drop it.
>
>> +
>> +static void dp_bridge_mode_set(struct drm_bridge *drm_bridge,
>> + const struct drm_display_mode *mode,
>> + const struct drm_display_mode *adjusted_mode)
>> +{
>> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
>> + struct msm_dp *dp_display = dp_bridge->dp_display;
>> +
>> + msm_dp_display_mode_set(dp_display, drm_bridge->encoder, mode,
>> adjusted_mode);
>> +}
>> +
>> +static void dp_bridge_enable(struct drm_bridge *drm_bridge)
>> +{
>> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
>> + struct msm_dp *dp_display = dp_bridge->dp_display;
>> +
>> + msm_dp_display_enable(dp_display, drm_bridge->encoder);
>> +}
>> +
>> +static void dp_bridge_disable(struct drm_bridge *drm_bridge)
>> +{
>> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
>> + struct msm_dp *dp_display = dp_bridge->dp_display;
>> +
>> + msm_dp_display_pre_disable(dp_display, drm_bridge->encoder);
>> +}
>> +
>> +static void dp_bridge_post_disable(struct drm_bridge *drm_bridge)
>> +{
>> + struct msm_dp_bridge *dp_bridge = to_dp_display(drm_bridge);
>> + struct msm_dp *dp_display = dp_bridge->dp_display;
>> +
>> + msm_dp_display_disable(dp_display, drm_bridge->encoder);
>> +}
>> +
>> +static const struct drm_bridge_funcs dp_bridge_ops = {
>> + .attach = dp_bridge_attach,
>> + .mode_fixup = NULL,
>> + .pre_enable = NULL,
>
> No need to initialize fields to default values (NULL). Drop these two
> please.
>
>> + .enable = dp_bridge_enable,
>> + .disable = dp_bridge_disable,
>> + .post_disable = dp_bridge_post_disable,
>> + .mode_set = dp_bridge_mode_set,
>> +};
>> +
>> +int msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_device
>> *dev,
>> + struct drm_encoder *encoder)
>> +{
>> + int rc;
>> + struct msm_drm_private *priv;
>> + struct msm_dp_bridge *dp_bridge;
>> + struct drm_bridge *bridge;
>> +
>> + dp_bridge = devm_kzalloc(dev->dev, sizeof(*dp_bridge), GFP_KERNEL);
>> + if (!dp_bridge)
>> + return -ENOMEM;
>> +
>> + dp_bridge->dp_display = dp_display;
>> +
>> + bridge = &dp_bridge->bridge;
>> + bridge->funcs = &dp_bridge_ops;
>> + bridge->encoder = encoder;
>> +
>> + rc = drm_bridge_attach(encoder, bridge, NULL,
>> DRM_BRIDGE_ATTACH_NO_CONNECTOR);
>> + if (rc) {
>> + DRM_ERROR("failed to attach bridge, rc=%d\n", rc);
>> + kfree(dp_bridge);
>> + return rc;
>> + }
>> +
>> + priv = dev->dev_private;
>> + priv->bridges[priv->num_bridges++] = bridge;
>> + dp_display->bridge = bridge;
>> +
>> + return 0;
>> +} > diff --git a/drivers/gpu/drm/msm/msm_drv.h
> b/drivers/gpu/drm/msm/msm_drv.h
>> index 4bb797e..9a2092f 100644
>> --- a/drivers/gpu/drm/msm/msm_drv.h
>> +++ b/drivers/gpu/drm/msm/msm_drv.h
>> @@ -388,8 +388,10 @@ int msm_dp_display_enable(struct msm_dp *dp,
>> struct drm_encoder *encoder);
>> int msm_dp_display_disable(struct msm_dp *dp, struct drm_encoder
>> *encoder);
>> int msm_dp_display_pre_disable(struct msm_dp *dp, struct
>> drm_encoder *encoder);
>> void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder
>> *encoder,
>> - struct drm_display_mode *mode,
>> - struct drm_display_mode *adjusted_mode);
>> + const struct drm_display_mode *mode,
>> + const struct drm_display_mode *adjusted_mode);
>> +int msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_device
>> *dev,
>> + struct drm_encoder *encoder);
>> void msm_dp_irq_postinstall(struct msm_dp *dp_display);
>> void msm_dp_snapshot(struct msm_disp_state *disp_state, struct
>> msm_dp *dp_display);
>> @@ -426,10 +428,16 @@ static inline int
>> msm_dp_display_pre_disable(struct msm_dp *dp,
>> }
>> static inline void msm_dp_display_mode_set(struct msm_dp *dp,
>> struct drm_encoder *encoder,
>> - struct drm_display_mode *mode,
>> - struct drm_display_mode *adjusted_mode)
>> + const struct drm_display_mode *mode,
>> + const struct drm_display_mode *adjusted_mode)
>> {
>> }
>> +static inline int msm_dp_bridge_init(struct msm_dp *dp_display,
>> + struct drm_device *dev,
>> + struct drm_encoder *encoder)
>> +{
>> + return -EINVAL;
>> +}
>
> If msm_dp_bridge_init() becomes DP-internal function, this is
> unnecessary.
>
>> static inline void msm_dp_irq_postinstall(struct msm_dp *dp_display)
>> {
>>
>
>
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2021-11-29 16:59 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-11-15 18:48 [PATCH v3] drm/msm/dp: employ bridge mechanism for display enable and disable Kuogee Hsieh
2021-11-15 18:48 ` Kuogee Hsieh
2021-11-24 19:45 ` Dmitry Baryshkov
2021-11-24 19:45 ` Dmitry Baryshkov
2021-11-29 16:57 ` Kuogee Hsieh
2021-11-29 16:57 ` Kuogee Hsieh
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