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 wouldhappen 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@xxxxxxxxxxx> 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.cindex 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.cindex 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.cindex 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.hindex 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.cindex 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.hb/drivers/gpu/drm/msm/msm_drv.hindex 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) {
