Hi Dmitry

On 2021-10-14 17:11, Dmitry Baryshkov wrote:

Merge old hdmi_bridge and hdmi_connector implementations. Use drm_bridge_connector instead.

Can you please comment on the validation done on this change? Has basic bootup been verified on db820c as thats the only platform which shall use this.

Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org

drivers/gpu/drm/msm/Makefile | 2 +- drivers/gpu/drm/msm/hdmi/hdmi.c | 12 +- drivers/gpu/drm/msm/hdmi/hdmi.h | 19 ++- drivers/gpu/drm/msm/hdmi/hdmi_bridge.c | 81 ++++++++- .../msm/hdmi/{hdmi_connector.c => hdmi_hpd.c} | 154 ++---------------- 5 files changed, 109 insertions(+), 159 deletions(-) rename drivers/gpu/drm/msm/hdmi/{hdmi_connector.c => hdmi_hpd.c} (62%)

diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 904535eda0c4..91b09cda8a9c 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -19,7 +19,7 @@ msm-y := \ hdmi/hdmi.o \ hdmi/hdmi_audio.o \ hdmi/hdmi_bridge.o \

• hdmi/hdmi_connector.o \

• hdmi/hdmi_hpd.o \ hdmi/hdmi_i2c.o \ hdmi/hdmi_phy.o \ hdmi/hdmi_phy_8960.o \

diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c index db17a000d968..d1cf4df7188c 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c @@ -8,6 +8,8 @@ #include <linux/of_irq.h> #include <linux/of_gpio.h>

+#include <drm/drm_bridge_connector.h>

#include <sound/hdmi-codec.h> #include "hdmi.h"

@@ -41,7 +43,7 @@ static irqreturn_t msm_hdmi_irq(int irq, void *dev_id) struct hdmi *hdmi = dev_id;

/* Process HPD: */

• msm_hdmi_connector_irq(hdmi->connector);

• msm_hdmi_hpd_irq(hdmi->bridge);

  /* Process DDC: */ msm_hdmi_i2c_irq(hdmi->i2c);

@@ -283,7 +285,7 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi, goto fail; }

• hdmi->connector = msm_hdmi_connector_init(hdmi);

• hdmi->connector = drm_bridge_connector_init(hdmi->dev, encoder); if (IS_ERR(hdmi->connector)) { ret = PTR_ERR(hdmi->connector); DRM_DEV_ERROR(dev->dev, "failed to create HDMI connector: %d\n",

ret); @@ -291,6 +293,8 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi, goto fail; }

• drm_connector_attach_encoder(hdmi->connector, hdmi->encoder);
• hdmi->irq = irq_of_parse_and_map(pdev->dev.of_node, 0); if (hdmi->irq < 0) { ret = hdmi->irq;

@@ -307,7 +311,9 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi, goto fail; }

• ret = msm_hdmi_hpd_enable(hdmi->connector);

• drm_bridge_connector_enable_hpd(hdmi->connector);
• ret = msm_hdmi_hpd_enable(hdmi->bridge); if (ret < 0) { DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret); goto fail;

diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h b/drivers/gpu/drm/msm/hdmi/hdmi.h index 82261078c6b1..736f348befb3 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.h +++ b/drivers/gpu/drm/msm/hdmi/hdmi.h @@ -114,6 +114,13 @@ struct hdmi_platform_config { struct hdmi_gpio_data gpios[HDMI_MAX_NUM_GPIO]; };

+struct hdmi_bridge {

• struct drm_bridge base;
• struct hdmi *hdmi;
• struct work_struct hpd_work;

+}; +#define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base)

void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on);

static inline void hdmi_write(struct hdmi *hdmi, u32 reg, u32 data) @@ -230,13 +237,11 @@ void msm_hdmi_audio_set_sample_rate(struct hdmi *hdmi, int rate); struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi); void msm_hdmi_bridge_destroy(struct drm_bridge *bridge);

-/*

• • hdmi connector:
• */

-void msm_hdmi_connector_irq(struct drm_connector *connector); -struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi); -int msm_hdmi_hpd_enable(struct drm_connector *connector); +void msm_hdmi_hpd_irq(struct drm_bridge *bridge); +enum drm_connector_status msm_hdmi_bridge_detect(

• struct drm_bridge *bridge);
  

+int msm_hdmi_hpd_enable(struct drm_bridge *bridge); +void msm_hdmi_hpd_disable(struct hdmi_bridge *hdmi_bridge);

/*

• i2c adapter for ddc:

diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c index f04eb4a70f0d..211b73dddf65 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c @@ -5,17 +5,16 @@ */

#include <linux/delay.h> +#include <drm/drm_bridge_connector.h>

+#include "msm_kms.h" #include "hdmi.h"

-struct hdmi_bridge {

• struct drm_bridge base;
• struct hdmi *hdmi;

-}; -#define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base)

void msm_hdmi_bridge_destroy(struct drm_bridge *bridge) {

• struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
• msm_hdmi_hpd_disable(hdmi_bridge);

}

static void msm_hdmi_power_on(struct drm_bridge *bridge) @@ -251,14 +250,76 @@ static void msm_hdmi_bridge_mode_set(struct drm_bridge *bridge, msm_hdmi_audio_update(hdmi); }

+static struct edid *msm_hdmi_bridge_get_edid(struct drm_bridge *bridge,

• struct drm_connector *connector)
  

+{

• struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
• struct hdmi *hdmi = hdmi_bridge->hdmi;
• struct edid *edid;
• uint32_t hdmi_ctrl;
• hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL);
• hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE);
• edid = drm_get_edid(connector, hdmi->i2c);
• hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);
• hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid);
• return edid;

+}

+static enum drm_mode_status msm_hdmi_bridge_mode_valid(struct drm_bridge *bridge,

• const struct drm_display_info *info,
  

• const struct drm_display_mode *mode)
  

+{

• struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
• struct hdmi *hdmi = hdmi_bridge->hdmi;
• const struct hdmi_platform_config *config = hdmi->config;
• struct msm_drm_private *priv = bridge->dev->dev_private;
• struct msm_kms *kms = priv->kms;
• long actual, requested;
• requested = 1000 * mode->clock;
• actual = kms->funcs->round_pixclk(kms,

• 	requested, hdmi_bridge->hdmi->encoder);
  

• /* for mdp5/apq8074, we manage our own pixel clk (as opposed to

• * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder
  

• * instead):
  

• */
  

• if (config->pwr_clk_cnt > 0)

• actual = clk_round_rate(hdmi->pwr_clks[0], actual);
  

• DBG("requested=%ld, actual=%ld", requested, actual);
• if (actual != requested)

• return MODE_CLOCK_RANGE;
  

• return 0;

+}

static const struct drm_bridge_funcs msm_hdmi_bridge_funcs = { .pre_enable = msm_hdmi_bridge_pre_enable, .enable = msm_hdmi_bridge_enable, .disable = msm_hdmi_bridge_disable, .post_disable = msm_hdmi_bridge_post_disable, .mode_set = msm_hdmi_bridge_mode_set,

• .mode_valid = msm_hdmi_bridge_mode_valid,
  

• .get_edid = msm_hdmi_bridge_get_edid,
  

• .detect = msm_hdmi_bridge_detect,
  

};

+static void +msm_hdmi_hotplug_work(struct work_struct *work) +{

• struct hdmi_bridge *hdmi_bridge =

• container_of(work, struct hdmi_bridge, hpd_work);
  

• struct drm_bridge *bridge = &hdmi_bridge->base;
• drm_bridge_hpd_notify(bridge, drm_bridge_detect(bridge));

+}

/* initialize bridge */ struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi) @@ -275,11 +336,17 @@ struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi) }

hdmi_bridge->hdmi = hdmi;

• INIT_WORK(&hdmi_bridge->hpd_work, msm_hdmi_hotplug_work);

  bridge = &hdmi_bridge->base; bridge->funcs = &msm_hdmi_bridge_funcs;

• bridge->ddc = hdmi->i2c;

• bridge->type = DRM_MODE_CONNECTOR_HDMIA;

• bridge->ops = DRM_BRIDGE_OP_HPD |

• DRM_BRIDGE_OP_DETECT |
  

• DRM_BRIDGE_OP_EDID;
  
  

• ret = drm_bridge_attach(hdmi->encoder, bridge, NULL, 0);

• ret = drm_bridge_attach(hdmi->encoder, bridge, NULL,

DRM_BRIDGE_ATTACH_NO_CONNECTOR); if (ret) goto fail;

diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c similarity index 62% rename from drivers/gpu/drm/msm/hdmi/hdmi_connector.c rename to drivers/gpu/drm/msm/hdmi/hdmi_hpd.c index a7f729cdec7b..1cda7bf23b3b 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c @@ -11,13 +11,6 @@ #include "msm_kms.h" #include "hdmi.h"

-struct hdmi_connector {

• struct drm_connector base;
• struct hdmi *hdmi;
• struct work_struct hpd_work;

-}; -#define to_hdmi_connector(x) container_of(x, struct hdmi_connector, base)

static void msm_hdmi_phy_reset(struct hdmi *hdmi) { unsigned int val; @@ -139,10 +132,10 @@ static void enable_hpd_clocks(struct hdmi *hdmi, bool enable) } }

-int msm_hdmi_hpd_enable(struct drm_connector *connector) +int msm_hdmi_hpd_enable(struct drm_bridge *bridge) {

• struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
• struct hdmi *hdmi = hdmi_connector->hdmi;

• struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
• struct hdmi *hdmi = hdmi_bridge->hdmi; const struct hdmi_platform_config *config = hdmi->config; struct device *dev = &hdmi->pdev->dev; uint32_t hpd_ctrl;

@@ -199,9 +192,9 @@ int msm_hdmi_hpd_enable(struct drm_connector *connector) return ret; }

-static void hdp_disable(struct hdmi_connector *hdmi_connector) +void msm_hdmi_hpd_disable(struct hdmi_bridge *hdmi_bridge) {

• struct hdmi *hdmi = hdmi_connector->hdmi;

• struct hdmi *hdmi = hdmi_bridge->hdmi; const struct hdmi_platform_config *config = hdmi->config; struct device *dev = &hdmi->pdev->dev; int ret;

@@ -227,19 +220,10 @@ static void hdp_disable(struct hdmi_connector *hdmi_connector) dev_warn(dev, "failed to disable hpd regulator: %d\n", ret); }

-static void -msm_hdmi_hotplug_work(struct work_struct *work) -{

• struct hdmi_connector *hdmi_connector =

• container_of(work, struct hdmi_connector, hpd_work);
  

• struct drm_connector *connector = &hdmi_connector->base;
• drm_helper_hpd_irq_event(connector->dev);

-}

-void msm_hdmi_connector_irq(struct drm_connector *connector) +void msm_hdmi_hpd_irq(struct drm_bridge *bridge) {

• struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
• struct hdmi *hdmi = hdmi_connector->hdmi;

• struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);

• struct hdmi *hdmi = hdmi_bridge->hdmi; uint32_t hpd_int_status, hpd_int_ctrl;

  /* Process HPD: */

@@ -262,7 +246,7 @@ void msm_hdmi_connector_irq(struct drm_connector *connector) hpd_int_ctrl |= HDMI_HPD_INT_CTRL_INT_CONNECT; hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl);

• queue_work(hdmi->workq, &hdmi_connector->hpd_work);
  

• queue_work(hdmi->workq, &hdmi_bridge->hpd_work);
  

  }

}

@@ -293,11 +277,11 @@ static enum drm_connector_status detect_gpio(struct hdmi *hdmi) connector_status_disconnected; }

-static enum drm_connector_status hdmi_connector_detect(

• struct drm_connector *connector, bool force)
  

+enum drm_connector_status msm_hdmi_bridge_detect(

• struct drm_bridge *bridge)
  

{

• struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
• struct hdmi *hdmi = hdmi_connector->hdmi;

• struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
• struct hdmi *hdmi = hdmi_bridge->hdmi; const struct hdmi_platform_config *config = hdmi->config; struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX]; enum drm_connector_status stat_gpio, stat_reg;

@@ -331,115 +315,3 @@ static enum drm_connector_status hdmi_connector_detect(

return stat_gpio; }

-static void hdmi_connector_destroy(struct drm_connector *connector) -{

• struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
• hdp_disable(hdmi_connector);
• drm_connector_cleanup(connector);
• kfree(hdmi_connector);

-}

-static int msm_hdmi_connector_get_modes(struct drm_connector *connector) -{

• struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
• struct hdmi *hdmi = hdmi_connector->hdmi;
• struct edid *edid;
• uint32_t hdmi_ctrl;
• int ret = 0;
• hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL);
• hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE);
• edid = drm_get_edid(connector, hdmi->i2c);
• hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);
• hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid);
• drm_connector_update_edid_property(connector, edid);
• if (edid) {

• ret = drm_add_edid_modes(connector, edid);
  

• kfree(edid);
  

• }
• return ret;

-}

-static int msm_hdmi_connector_mode_valid(struct drm_connector *connector,

• 		 struct drm_display_mode *mode)
  

-{

• struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
• struct hdmi *hdmi = hdmi_connector->hdmi;
• const struct hdmi_platform_config *config = hdmi->config;
• struct msm_drm_private *priv = connector->dev->dev_private;
• struct msm_kms *kms = priv->kms;
• long actual, requested;
• requested = 1000 * mode->clock;
• actual = kms->funcs->round_pixclk(kms,

• 	requested, hdmi_connector->hdmi->encoder);
  

• /* for mdp5/apq8074, we manage our own pixel clk (as opposed to

• * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder
  

• * instead):
  

• */
  

• if (config->pwr_clk_cnt > 0)

• actual = clk_round_rate(hdmi->pwr_clks[0], actual);
  

• DBG("requested=%ld, actual=%ld", requested, actual);
• if (actual != requested)

• return MODE_CLOCK_RANGE;
  

• return 0;

-}

-static const struct drm_connector_funcs hdmi_connector_funcs = {

• .detect = hdmi_connector_detect,
• .fill_modes = drm_helper_probe_single_connector_modes,
• .destroy = hdmi_connector_destroy,
• .reset = drm_atomic_helper_connector_reset,
• .atomic_duplicate_state =

drm_atomic_helper_connector_duplicate_state,

• .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,

-};

-static const struct drm_connector_helper_funcs msm_hdmi_connector_helper_funcs = {

• .get_modes = msm_hdmi_connector_get_modes,
• .mode_valid = msm_hdmi_connector_mode_valid,

-};

-/* initialize connector */ -struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi) -{

• struct drm_connector *connector = NULL;
• struct hdmi_connector *hdmi_connector;
• hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL);
• if (!hdmi_connector)

• return ERR_PTR(-ENOMEM);
  

• hdmi_connector->hdmi = hdmi;
• INIT_WORK(&hdmi_connector->hpd_work, msm_hdmi_hotplug_work);
• connector = &hdmi_connector->base;
• drm_connector_init_with_ddc(hdmi->dev, connector,

• 		    &hdmi_connector_funcs,
  

• 		    DRM_MODE_CONNECTOR_HDMIA,
  

• 		    hdmi->i2c);
  

• drm_connector_helper_add(connector,

&msm_hdmi_connector_helper_funcs);

• connector->polled = DRM_CONNECTOR_POLL_CONNECT |

• 	DRM_CONNECTOR_POLL_DISCONNECT;
  

• connector->interlace_allowed = 0;
• connector->doublescan_allowed = 0;
• drm_connector_attach_encoder(connector, hdmi->encoder);
• return connector;

-}

On 2021-10-16 07:21, Dmitry Baryshkov wrote:

On Sat, 16 Oct 2021 at 01:25, abhinavk@codeaurora.org wrote:

...

Hi Dmitry

On 2021-10-14 17:11, Dmitry Baryshkov wrote:

...

Merge old hdmi_bridge and hdmi_connector implementations. Use drm_bridge_connector instead.

Can you please comment on the validation done on this change? Has basic bootup been verified on db820c as thats the only platform which shall use this.

Yes, this has been developed and validated on db820c

Thanks for confirming.

...

...

Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org

drivers/gpu/drm/msm/Makefile | 2 +- drivers/gpu/drm/msm/hdmi/hdmi.c | 12 +- drivers/gpu/drm/msm/hdmi/hdmi.h | 19 ++- drivers/gpu/drm/msm/hdmi/hdmi_bridge.c | 81 ++++++++- .../msm/hdmi/{hdmi_connector.c => hdmi_hpd.c} | 154 ++---------------- 5 files changed, 109 insertions(+), 159 deletions(-) rename drivers/gpu/drm/msm/hdmi/{hdmi_connector.c => hdmi_hpd.c} (62%)

diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 904535eda0c4..91b09cda8a9c 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -19,7 +19,7 @@ msm-y := \ hdmi/hdmi.o \ hdmi/hdmi_audio.o \ hdmi/hdmi_bridge.o \

• hdmi/hdmi_connector.o \
  

• hdmi/hdmi_hpd.o \
  hdmi/hdmi_i2c.o \
  hdmi/hdmi_phy.o \
  hdmi/hdmi_phy_8960.o \
  

diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c index db17a000d968..d1cf4df7188c 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c @@ -8,6 +8,8 @@ #include <linux/of_irq.h> #include <linux/of_gpio.h>

+#include <drm/drm_bridge_connector.h>

#include <sound/hdmi-codec.h> #include "hdmi.h"

@@ -41,7 +43,7 @@ static irqreturn_t msm_hdmi_irq(int irq, void *dev_id) struct hdmi *hdmi = dev_id;

  /* Process HPD: */

• msm_hdmi_connector_irq(hdmi->connector);
  

• msm_hdmi_hpd_irq(hdmi->bridge);
  
  /* Process DDC: */
  msm_hdmi_i2c_irq(hdmi->i2c);
  

@@ -283,7 +285,7 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi, goto fail; }

• hdmi->connector = msm_hdmi_connector_init(hdmi);
  

• hdmi->connector = drm_bridge_connector_init(hdmi->dev, encoder);
  if (IS_ERR(hdmi->connector)) {
          ret = PTR_ERR(hdmi->connector);
          DRM_DEV_ERROR(dev->dev, "failed to create HDMI connector: %d\n",
  

ret); @@ -291,6 +293,8 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi, goto fail; }

• drm_connector_attach_encoder(hdmi->connector, hdmi->encoder);
  

• hdmi->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
  if (hdmi->irq < 0) {
          ret = hdmi->irq;
  

@@ -307,7 +311,9 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi, goto fail; }

• ret = msm_hdmi_hpd_enable(hdmi->connector);
  

• drm_bridge_connector_enable_hpd(hdmi->connector);
  

• ret = msm_hdmi_hpd_enable(hdmi->bridge);
  if (ret < 0) {
          DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret);
          goto fail;
  

diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h b/drivers/gpu/drm/msm/hdmi/hdmi.h index 82261078c6b1..736f348befb3 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.h +++ b/drivers/gpu/drm/msm/hdmi/hdmi.h @@ -114,6 +114,13 @@ struct hdmi_platform_config { struct hdmi_gpio_data gpios[HDMI_MAX_NUM_GPIO]; };

+struct hdmi_bridge {

• struct drm_bridge base;
  

• struct hdmi *hdmi;
  

• struct work_struct hpd_work;
  

+}; +#define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base)

void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on);

static inline void hdmi_write(struct hdmi *hdmi, u32 reg, u32 data) @@ -230,13 +237,11 @@ void msm_hdmi_audio_set_sample_rate(struct hdmi *hdmi, int rate); struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi); void msm_hdmi_bridge_destroy(struct drm_bridge *bridge);

-/*

• • hdmi connector:
• */

-void msm_hdmi_connector_irq(struct drm_connector *connector); -struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi); -int msm_hdmi_hpd_enable(struct drm_connector *connector); +void msm_hdmi_hpd_irq(struct drm_bridge *bridge); +enum drm_connector_status msm_hdmi_bridge_detect(

•         struct drm_bridge *bridge);
  

+int msm_hdmi_hpd_enable(struct drm_bridge *bridge); +void msm_hdmi_hpd_disable(struct hdmi_bridge *hdmi_bridge);

/*

• i2c adapter for ddc:

diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c index f04eb4a70f0d..211b73dddf65 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c @@ -5,17 +5,16 @@ */

#include <linux/delay.h> +#include <drm/drm_bridge_connector.h>

+#include "msm_kms.h" #include "hdmi.h"

-struct hdmi_bridge {

• struct drm_bridge base;
  

• struct hdmi *hdmi;
  

-}; -#define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base)

void msm_hdmi_bridge_destroy(struct drm_bridge *bridge) {

• struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
  

• msm_hdmi_hpd_disable(hdmi_bridge);
  

}

static void msm_hdmi_power_on(struct drm_bridge *bridge) @@ -251,14 +250,76 @@ static void msm_hdmi_bridge_mode_set(struct drm_bridge *bridge, msm_hdmi_audio_update(hdmi); }

+static struct edid *msm_hdmi_bridge_get_edid(struct drm_bridge *bridge,

•         struct drm_connector *connector)
  

+{

• struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
  

• struct hdmi *hdmi = hdmi_bridge->hdmi;
  

• struct edid *edid;
  

• uint32_t hdmi_ctrl;
  

• hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL);
  

• hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE);
  

• edid = drm_get_edid(connector, hdmi->i2c);
  

• hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);
  

• hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid);
  

• return edid;
  

+}

+static enum drm_mode_status msm_hdmi_bridge_mode_valid(struct drm_bridge *bridge,

•         const struct drm_display_info *info,
  

•         const struct drm_display_mode *mode)
  

+{

• struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
  

• struct hdmi *hdmi = hdmi_bridge->hdmi;
  

• const struct hdmi_platform_config *config = hdmi->config;
  

• struct msm_drm_private *priv = bridge->dev->dev_private;
  

• struct msm_kms *kms = priv->kms;
  

• long actual, requested;
  

• requested = 1000 * mode->clock;
  

• actual = kms->funcs->round_pixclk(kms,
  

•                 requested, hdmi_bridge->hdmi->encoder);
  

• /* for mdp5/apq8074, we manage our own pixel clk (as opposed to
  

•  * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder
  

•  * instead):
  

•  */
  

• if (config->pwr_clk_cnt > 0)
  

•         actual = clk_round_rate(hdmi->pwr_clks[0], actual);
  

• DBG("requested=%ld, actual=%ld", requested, actual);
  

• if (actual != requested)
  

•         return MODE_CLOCK_RANGE;
  

• return 0;
  

+}

static const struct drm_bridge_funcs msm_hdmi_bridge_funcs = { .pre_enable = msm_hdmi_bridge_pre_enable, .enable = msm_hdmi_bridge_enable, .disable = msm_hdmi_bridge_disable, .post_disable = msm_hdmi_bridge_post_disable, .mode_set = msm_hdmi_bridge_mode_set,

•         .mode_valid = msm_hdmi_bridge_mode_valid,
  

•         .get_edid = msm_hdmi_bridge_get_edid,
  

•         .detect = msm_hdmi_bridge_detect,
  

};

+static void +msm_hdmi_hotplug_work(struct work_struct *work) +{

• struct hdmi_bridge *hdmi_bridge =
  

•         container_of(work, struct hdmi_bridge, hpd_work);
  

• struct drm_bridge *bridge = &hdmi_bridge->base;
  

• drm_bridge_hpd_notify(bridge, drm_bridge_detect(bridge));
  

+}

/* initialize bridge */ struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi) @@ -275,11 +336,17 @@ struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi) }

  hdmi_bridge->hdmi = hdmi;

• INIT_WORK(&hdmi_bridge->hpd_work, msm_hdmi_hotplug_work);
  
  bridge = &hdmi_bridge->base;
  bridge->funcs = &msm_hdmi_bridge_funcs;
  

• bridge->ddc = hdmi->i2c;
  

• bridge->type = DRM_MODE_CONNECTOR_HDMIA;
  

• bridge->ops = DRM_BRIDGE_OP_HPD |
  

•         DRM_BRIDGE_OP_DETECT |
  

•         DRM_BRIDGE_OP_EDID;
  

Please correct me if wrong here. When we set DRM_BRIDGE_OP_HPD, it means we need to set the hpd_enable and hpd_disable callbacks. I am not seeing those being set.

707 * @DRM_BRIDGE_OP_HPD: The bridge can detect hot-plug and hot-unplug 708 * without requiring polling. Bridges that set this flag shall 709 * implement the &drm_bridge_funcs->hpd_enable and 710 * &drm_bridge_funcs->hpd_disable callbacks if they support enabling 711 * and disabling hot-plug detection dynamically. 712 */ 713 DRM_BRIDGE_OP_HPD = BIT(2),

So when drm_bridge_connector_enable_hpd() is called, its a no-op as hpd_enable() callback is not set.

msm_hdmi_hpd_enable() actually enables the HPD logic which is getting called from msm_hdmi_modeset_init() and not from hpd_enable().

In that case, do we need to set DRM_BRIDGE_OP_HPD for this? If we dont, what will happen?

...

...

• ret = drm_bridge_attach(hdmi->encoder, bridge, NULL, 0);
  

• ret = drm_bridge_attach(hdmi->encoder, bridge, NULL,
  

DRM_BRIDGE_ATTACH_NO_CONNECTOR); if (ret) goto fail;

diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c similarity index 62% rename from drivers/gpu/drm/msm/hdmi/hdmi_connector.c rename to drivers/gpu/drm/msm/hdmi/hdmi_hpd.c index a7f729cdec7b..1cda7bf23b3b 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c @@ -11,13 +11,6 @@ #include "msm_kms.h" #include "hdmi.h"

-struct hdmi_connector {

• struct drm_connector base;
  

• struct hdmi *hdmi;
  

• struct work_struct hpd_work;
  

-}; -#define to_hdmi_connector(x) container_of(x, struct hdmi_connector, base)

static void msm_hdmi_phy_reset(struct hdmi *hdmi) { unsigned int val; @@ -139,10 +132,10 @@ static void enable_hpd_clocks(struct hdmi *hdmi, bool enable) } }

-int msm_hdmi_hpd_enable(struct drm_connector *connector) +int msm_hdmi_hpd_enable(struct drm_bridge *bridge) {

• struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
  

• struct hdmi *hdmi = hdmi_connector->hdmi;
  

• struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
  

• struct hdmi *hdmi = hdmi_bridge->hdmi;
  const struct hdmi_platform_config *config = hdmi->config;
  struct device *dev = &hdmi->pdev->dev;
  uint32_t hpd_ctrl;
  

@@ -199,9 +192,9 @@ int msm_hdmi_hpd_enable(struct drm_connector *connector) return ret; }

-static void hdp_disable(struct hdmi_connector *hdmi_connector) +void msm_hdmi_hpd_disable(struct hdmi_bridge *hdmi_bridge) {

• struct hdmi *hdmi = hdmi_connector->hdmi;
  

• struct hdmi *hdmi = hdmi_bridge->hdmi;
  const struct hdmi_platform_config *config = hdmi->config;
  struct device *dev = &hdmi->pdev->dev;
  int ret;
  

@@ -227,19 +220,10 @@ static void hdp_disable(struct hdmi_connector *hdmi_connector) dev_warn(dev, "failed to disable hpd regulator: %d\n", ret); }

-static void -msm_hdmi_hotplug_work(struct work_struct *work) -{

• struct hdmi_connector *hdmi_connector =
  

•         container_of(work, struct hdmi_connector, hpd_work);
  

• struct drm_connector *connector = &hdmi_connector->base;
  

• drm_helper_hpd_irq_event(connector->dev);
  

-}

-void msm_hdmi_connector_irq(struct drm_connector *connector) +void msm_hdmi_hpd_irq(struct drm_bridge *bridge) {

• struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
  

• struct hdmi *hdmi = hdmi_connector->hdmi;
  

• struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
  

• struct hdmi *hdmi = hdmi_bridge->hdmi;
  uint32_t hpd_int_status, hpd_int_ctrl;
  
  /* Process HPD: */
  

@@ -262,7 +246,7 @@ void msm_hdmi_connector_irq(struct drm_connector *connector) hpd_int_ctrl |= HDMI_HPD_INT_CTRL_INT_CONNECT; hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl);

•         queue_work(hdmi->workq, &hdmi_connector->hpd_work);
  

•         queue_work(hdmi->workq, &hdmi_bridge->hpd_work);
  }
  

}

@@ -293,11 +277,11 @@ static enum drm_connector_status detect_gpio(struct hdmi *hdmi) connector_status_disconnected; }

-static enum drm_connector_status hdmi_connector_detect(

•         struct drm_connector *connector, bool force)
  

+enum drm_connector_status msm_hdmi_bridge_detect(

•         struct drm_bridge *bridge)
  

{

• struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
  

• struct hdmi *hdmi = hdmi_connector->hdmi;
  

• struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
  

• struct hdmi *hdmi = hdmi_bridge->hdmi;
  const struct hdmi_platform_config *config = hdmi->config;
  struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX];
  enum drm_connector_status stat_gpio, stat_reg;
  

@@ -331,115 +315,3 @@ static enum drm_connector_status hdmi_connector_detect(

  return stat_gpio;

}

-static void hdmi_connector_destroy(struct drm_connector *connector) -{

• struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
  

• hdp_disable(hdmi_connector);
  

• drm_connector_cleanup(connector);
  

• kfree(hdmi_connector);
  

-}

-static int msm_hdmi_connector_get_modes(struct drm_connector *connector) -{

• struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
  

• struct hdmi *hdmi = hdmi_connector->hdmi;
  

• struct edid *edid;
  

• uint32_t hdmi_ctrl;
  

• int ret = 0;
  

• hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL);
  

• hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE);
  

• edid = drm_get_edid(connector, hdmi->i2c);
  

• hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);
  

• hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid);
  

• drm_connector_update_edid_property(connector, edid);
  

• if (edid) {
  

•         ret = drm_add_edid_modes(connector, edid);
  

•         kfree(edid);
  

• }
  

• return ret;
  

-}

-static int msm_hdmi_connector_mode_valid(struct drm_connector *connector,

•                          struct drm_display_mode *mode)
  

-{

• struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector);
  

• struct hdmi *hdmi = hdmi_connector->hdmi;
  

• const struct hdmi_platform_config *config = hdmi->config;
  

• struct msm_drm_private *priv = connector->dev->dev_private;
  

• struct msm_kms *kms = priv->kms;
  

• long actual, requested;
  

• requested = 1000 * mode->clock;
  

• actual = kms->funcs->round_pixclk(kms,
  

•                 requested, hdmi_connector->hdmi->encoder);
  

• /* for mdp5/apq8074, we manage our own pixel clk (as opposed to
  

•  * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder
  

•  * instead):
  

•  */
  

• if (config->pwr_clk_cnt > 0)
  

•         actual = clk_round_rate(hdmi->pwr_clks[0], actual);
  

• DBG("requested=%ld, actual=%ld", requested, actual);
  

• if (actual != requested)
  

•         return MODE_CLOCK_RANGE;
  

• return 0;
  

-}

-static const struct drm_connector_funcs hdmi_connector_funcs = {

• .detect = hdmi_connector_detect,
  

• .fill_modes = drm_helper_probe_single_connector_modes,
  

• .destroy = hdmi_connector_destroy,
  

• .reset = drm_atomic_helper_connector_reset,
  

• .atomic_duplicate_state =
  

drm_atomic_helper_connector_duplicate_state,

• .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
  

-};

-static const struct drm_connector_helper_funcs msm_hdmi_connector_helper_funcs = {

• .get_modes = msm_hdmi_connector_get_modes,
  

• .mode_valid = msm_hdmi_connector_mode_valid,
  

-};

-/* initialize connector */ -struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi) -{

• struct drm_connector *connector = NULL;
  

• struct hdmi_connector *hdmi_connector;
  

• hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL);
  

• if (!hdmi_connector)
  

•         return ERR_PTR(-ENOMEM);
  

• hdmi_connector->hdmi = hdmi;
  

• INIT_WORK(&hdmi_connector->hpd_work, msm_hdmi_hotplug_work);
  

• connector = &hdmi_connector->base;
  

• drm_connector_init_with_ddc(hdmi->dev, connector,
  

•                             &hdmi_connector_funcs,
  

•                             DRM_MODE_CONNECTOR_HDMIA,
  

•                             hdmi->i2c);
  

• drm_connector_helper_add(connector,
  

&msm_hdmi_connector_helper_funcs);

• connector->polled = DRM_CONNECTOR_POLL_CONNECT |
  

•                 DRM_CONNECTOR_POLL_DISCONNECT;
  

• connector->interlace_allowed = 0;
  

• connector->doublescan_allowed = 0;
  

• drm_connector_attach_encoder(connector, hdmi->encoder);
  

• return connector;
  

-}

On 11/25/2021 4:50 AM, Dmitry Baryshkov wrote:

On 19/10/2021 02:54, abhinavk@codeaurora.org wrote:

...

On 2021-10-16 07:21, Dmitry Baryshkov wrote:

...

On Sat, 16 Oct 2021 at 01:25, abhinavk@codeaurora.org wrote:

...

Hi Dmitry

On 2021-10-14 17:11, Dmitry Baryshkov wrote:

...

Merge old hdmi_bridge and hdmi_connector implementations. Use drm_bridge_connector instead.

Can you please comment on the validation done on this change? Has basic bootup been verified on db820c as thats the only platform which shall use this.

Yes, this has been developed and validated on db820c

Thanks for confirming.

...

...

...

Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org

drivers/gpu/drm/msm/Makefile                  |   2 +-   drivers/gpu/drm/msm/hdmi/hdmi.c               |  12 +-   drivers/gpu/drm/msm/hdmi/hdmi.h               |  19 ++-   drivers/gpu/drm/msm/hdmi/hdmi_bridge.c        |  81 ++++++++-   .../msm/hdmi/{hdmi_connector.c => hdmi_hpd.c} | 154

++----------------

...

5 files changed, 109 insertions(+), 159 deletions(-)   rename drivers/gpu/drm/msm/hdmi/{hdmi_connector.c => hdmi_hpd.c}

(62%)

...

diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 904535eda0c4..91b09cda8a9c 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -19,7 +19,7 @@ msm-y := \        hdmi/hdmi.o \        hdmi/hdmi_audio.o \        hdmi/hdmi_bridge.o \ -     hdmi/hdmi_connector.o \ +     hdmi/hdmi_hpd.o \        hdmi/hdmi_i2c.o \        hdmi/hdmi_phy.o \        hdmi/hdmi_phy_8960.o \ diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c index db17a000d968..d1cf4df7188c 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c @@ -8,6 +8,8 @@   #include <linux/of_irq.h>   #include <linux/of_gpio.h>

+#include <drm/drm_bridge_connector.h>

#include <sound/hdmi-codec.h>   #include "hdmi.h"

@@ -41,7 +43,7 @@ static irqreturn_t msm_hdmi_irq(int irq, void *dev_id)        struct hdmi *hdmi = dev_id;

/* Process HPD: */ -     msm_hdmi_connector_irq(hdmi->connector); +     msm_hdmi_hpd_irq(hdmi->bridge);

/* Process DDC: */        msm_hdmi_i2c_irq(hdmi->i2c); @@ -283,7 +285,7 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi,                goto fail;        }

-     hdmi->connector = msm_hdmi_connector_init(hdmi); +     hdmi->connector = drm_bridge_connector_init(hdmi->dev,

encoder);

...

if (IS_ERR(hdmi->connector)) {                ret = PTR_ERR(hdmi->connector);                DRM_DEV_ERROR(dev->dev, "failed to create HDMI

connector: %d\n",

...

ret); @@ -291,6 +293,8 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi,                goto fail;        }

+     drm_connector_attach_encoder(hdmi->connector, hdmi->encoder);

hdmi->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);        if (hdmi->irq < 0) {                ret = hdmi->irq; @@ -307,7 +311,9 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi,                goto fail;        }

-     ret = msm_hdmi_hpd_enable(hdmi->connector); +     drm_bridge_connector_enable_hpd(hdmi->connector);

+     ret = msm_hdmi_hpd_enable(hdmi->bridge);        if (ret < 0) {                DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable

HPD: %d\n", ret);

...

goto fail; diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h b/drivers/gpu/drm/msm/hdmi/hdmi.h index 82261078c6b1..736f348befb3 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.h +++ b/drivers/gpu/drm/msm/hdmi/hdmi.h @@ -114,6 +114,13 @@ struct hdmi_platform_config {        struct hdmi_gpio_data gpios[HDMI_MAX_NUM_GPIO];   };

+struct hdmi_bridge { +     struct drm_bridge base; +     struct hdmi *hdmi; +     struct work_struct hpd_work; +}; +#define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base)

void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on);

static inline void hdmi_write(struct hdmi *hdmi, u32 reg, u32 data) @@ -230,13 +237,11 @@ void msm_hdmi_audio_set_sample_rate(struct hdmi *hdmi, int rate);   struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi);   void msm_hdmi_bridge_destroy(struct drm_bridge *bridge);

-/*

• • hdmi connector:
• */

-void msm_hdmi_connector_irq(struct drm_connector *connector); -struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi); -int msm_hdmi_hpd_enable(struct drm_connector *connector); +void msm_hdmi_hpd_irq(struct drm_bridge *bridge); +enum drm_connector_status msm_hdmi_bridge_detect( +             struct drm_bridge *bridge); +int msm_hdmi_hpd_enable(struct drm_bridge *bridge); +void msm_hdmi_hpd_disable(struct hdmi_bridge *hdmi_bridge);

/*    * i2c adapter for ddc: diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c index f04eb4a70f0d..211b73dddf65 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c @@ -5,17 +5,16 @@    */

#include <linux/delay.h> +#include <drm/drm_bridge_connector.h>

+#include "msm_kms.h"   #include "hdmi.h"

-struct hdmi_bridge { -     struct drm_bridge base; -     struct hdmi *hdmi; -}; -#define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base)

void msm_hdmi_bridge_destroy(struct drm_bridge *bridge)   { +     struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);

+     msm_hdmi_hpd_disable(hdmi_bridge);   }

static void msm_hdmi_power_on(struct drm_bridge *bridge) @@ -251,14 +250,76 @@ static void msm_hdmi_bridge_mode_set(struct drm_bridge *bridge,                msm_hdmi_audio_update(hdmi);   }

+static struct edid *msm_hdmi_bridge_get_edid(struct drm_bridge *bridge, +             struct drm_connector *connector) +{ +     struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); +     struct hdmi *hdmi = hdmi_bridge->hdmi; +     struct edid *edid; +     uint32_t hdmi_ctrl;

+     hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL); +     hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE);

+     edid = drm_get_edid(connector, hdmi->i2c);

+     hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);

+     hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid);

+     return edid; +}

+static enum drm_mode_status msm_hdmi_bridge_mode_valid(struct drm_bridge *bridge, +             const struct drm_display_info *info, +             const struct drm_display_mode *mode) +{ +     struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); +     struct hdmi *hdmi = hdmi_bridge->hdmi; +     const struct hdmi_platform_config *config = hdmi->config; +     struct msm_drm_private *priv = bridge->dev->dev_private; +     struct msm_kms *kms = priv->kms; +     long actual, requested;

+     requested = 1000 * mode->clock; +     actual = kms->funcs->round_pixclk(kms, +                     requested, hdmi_bridge->hdmi->encoder);

+     /* for mdp5/apq8074, we manage our own pixel clk (as opposed to +      * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder +      * instead): +      */ +     if (config->pwr_clk_cnt > 0) +             actual = clk_round_rate(hdmi->pwr_clks[0], actual);

+     DBG("requested=%ld, actual=%ld", requested, actual);

+     if (actual != requested) +             return MODE_CLOCK_RANGE;

+     return 0; +}

static const struct drm_bridge_funcs msm_hdmi_bridge_funcs = {                .pre_enable = msm_hdmi_bridge_pre_enable,                .enable = msm_hdmi_bridge_enable,                .disable = msm_hdmi_bridge_disable,                .post_disable = msm_hdmi_bridge_post_disable,                .mode_set = msm_hdmi_bridge_mode_set, +             .mode_valid = msm_hdmi_bridge_mode_valid, +             .get_edid = msm_hdmi_bridge_get_edid, +             .detect = msm_hdmi_bridge_detect,   };

+static void +msm_hdmi_hotplug_work(struct work_struct *work) +{ +     struct hdmi_bridge *hdmi_bridge = +             container_of(work, struct hdmi_bridge, hpd_work); +     struct drm_bridge *bridge = &hdmi_bridge->base;

+     drm_bridge_hpd_notify(bridge, drm_bridge_detect(bridge)); +}

/* initialize bridge */   struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi) @@ -275,11 +336,17 @@ struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi)        }

hdmi_bridge->hdmi = hdmi; +     INIT_WORK(&hdmi_bridge->hpd_work, msm_hdmi_hotplug_work);

bridge = &hdmi_bridge->base;        bridge->funcs = &msm_hdmi_bridge_funcs; +     bridge->ddc = hdmi->i2c; +     bridge->type = DRM_MODE_CONNECTOR_HDMIA; +     bridge->ops = DRM_BRIDGE_OP_HPD | +             DRM_BRIDGE_OP_DETECT | +             DRM_BRIDGE_OP_EDID;

Please correct me if wrong here. When we set DRM_BRIDGE_OP_HPD, it means we need to set the hpd_enable and hpd_disable callbacks. I am not seeing those being set.

707      * @DRM_BRIDGE_OP_HPD: The bridge can detect hot-plug and hot-unplug 708      * without requiring polling. Bridges that set this flag shall 709      * implement the &drm_bridge_funcs->hpd_enable and 710      * &drm_bridge_funcs->hpd_disable callbacks if they support enabling 711      * and disabling hot-plug detection dynamically. 712      */ 713     DRM_BRIDGE_OP_HPD = BIT(2),

So when drm_bridge_connector_enable_hpd() is called, its a no-op as hpd_enable() callback is not set.

msm_hdmi_hpd_enable() actually enables the HPD logic which is getting called from msm_hdmi_modeset_init() and not from hpd_enable().

In that case, do we need to set DRM_BRIDGE_OP_HPD for this? If we dont, what will happen?

Without this flag, the drm_bridge_connector will not know that this bridge is capable of generating HPD events on its own, ending up with polling implementation. See drm_bridge_connector_init(), drm_helper_hpd_irq_event(), etc.

Thanks for the details. Then, as per the documentation on the DRM_BRIDGE_OP_HPD, shouldnt we also assign msm_hdmi_hpd_enable to hpd_enable callback? Since we are already calling drm_bridge_connector_enable_hpd(), that should take care of calling it using the callback then.

Similarly, you can assign msm_hdmi_hpd_disable to hpd_disable op and then call drm_bridge_connector_disable_hpd() in those places.

That way, functionality remains intact and we follow the documentation.

...

...

...

...

-     ret = drm_bridge_attach(hdmi->encoder, bridge, NULL, 0); +     ret = drm_bridge_attach(hdmi->encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);        if (ret)                goto fail;

diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c similarity index 62% rename from drivers/gpu/drm/msm/hdmi/hdmi_connector.c rename to drivers/gpu/drm/msm/hdmi/hdmi_hpd.c index a7f729cdec7b..1cda7bf23b3b 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c @@ -11,13 +11,6 @@   #include "msm_kms.h"   #include "hdmi.h"

-struct hdmi_connector { -     struct drm_connector base; -     struct hdmi *hdmi; -     struct work_struct hpd_work; -}; -#define to_hdmi_connector(x) container_of(x, struct hdmi_connector, base)

static void msm_hdmi_phy_reset(struct hdmi *hdmi)   {        unsigned int val; @@ -139,10 +132,10 @@ static void enable_hpd_clocks(struct hdmi

*hdmi,

...

bool enable)        }   }

-int msm_hdmi_hpd_enable(struct drm_connector *connector) +int msm_hdmi_hpd_enable(struct drm_bridge *bridge)   { -     struct hdmi_connector *hdmi_connector =

to_hdmi_connector(connector);

...

-     struct hdmi *hdmi = hdmi_connector->hdmi; +     struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); +     struct hdmi *hdmi = hdmi_bridge->hdmi;        const struct hdmi_platform_config *config = hdmi->config;        struct device *dev = &hdmi->pdev->dev;        uint32_t hpd_ctrl; @@ -199,9 +192,9 @@ int msm_hdmi_hpd_enable(struct drm_connector *connector)        return ret;   }

-static void hdp_disable(struct hdmi_connector *hdmi_connector) +void msm_hdmi_hpd_disable(struct hdmi_bridge *hdmi_bridge)   { -     struct hdmi *hdmi = hdmi_connector->hdmi; +     struct hdmi *hdmi = hdmi_bridge->hdmi;        const struct hdmi_platform_config *config = hdmi->config;        struct device *dev = &hdmi->pdev->dev;        int ret; @@ -227,19 +220,10 @@ static void hdp_disable(struct hdmi_connector *hdmi_connector)                dev_warn(dev, "failed to disable hpd regulator:

%d\n", ret);

...

}

-static void -msm_hdmi_hotplug_work(struct work_struct *work) -{ -     struct hdmi_connector *hdmi_connector = -             container_of(work, struct hdmi_connector, hpd_work); -     struct drm_connector *connector = &hdmi_connector->base; -     drm_helper_hpd_irq_event(connector->dev); -}

-void msm_hdmi_connector_irq(struct drm_connector *connector) +void msm_hdmi_hpd_irq(struct drm_bridge *bridge)   { -     struct hdmi_connector *hdmi_connector =

to_hdmi_connector(connector);

...

-     struct hdmi *hdmi = hdmi_connector->hdmi; +     struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); +     struct hdmi *hdmi = hdmi_bridge->hdmi;        uint32_t hpd_int_status, hpd_int_ctrl;

/* Process HPD: */ @@ -262,7 +246,7 @@ void msm_hdmi_connector_irq(struct drm_connector *connector)                        hpd_int_ctrl |= HDMI_HPD_INT_CTRL_INT_CONNECT;                hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl);

-             queue_work(hdmi->workq, &hdmi_connector->hpd_work); +             queue_work(hdmi->workq, &hdmi_bridge->hpd_work);        }   }

@@ -293,11 +277,11 @@ static enum drm_connector_status detect_gpio(struct hdmi *hdmi)                        connector_status_disconnected;   }

-static enum drm_connector_status hdmi_connector_detect( -             struct drm_connector *connector, bool force) +enum drm_connector_status msm_hdmi_bridge_detect( +             struct drm_bridge *bridge)   { -     struct hdmi_connector *hdmi_connector =

to_hdmi_connector(connector);

...

-     struct hdmi *hdmi = hdmi_connector->hdmi; +     struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); +     struct hdmi *hdmi = hdmi_bridge->hdmi;        const struct hdmi_platform_config *config = hdmi->config;        struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX];        enum drm_connector_status stat_gpio, stat_reg; @@ -331,115 +315,3 @@ static enum drm_connector_status hdmi_connector_detect(

return stat_gpio;   }

-static void hdmi_connector_destroy(struct drm_connector *connector) -{ -     struct hdmi_connector *hdmi_connector =

to_hdmi_connector(connector);

...

-     hdp_disable(hdmi_connector);

-     drm_connector_cleanup(connector);

-     kfree(hdmi_connector); -}

-static int msm_hdmi_connector_get_modes(struct drm_connector *connector) -{ -     struct hdmi_connector *hdmi_connector =

to_hdmi_connector(connector);

...

-     struct hdmi *hdmi = hdmi_connector->hdmi; -     struct edid *edid; -     uint32_t hdmi_ctrl; -     int ret = 0;

-     hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL); -     hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE);

-     edid = drm_get_edid(connector, hdmi->i2c);

-     hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl);

-     hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid); -     drm_connector_update_edid_property(connector, edid);

-     if (edid) { -             ret = drm_add_edid_modes(connector, edid); -             kfree(edid); -     }

-     return ret; -}

-static int msm_hdmi_connector_mode_valid(struct drm_connector *connector, -                              struct drm_display_mode *mode) -{ -     struct hdmi_connector *hdmi_connector =

to_hdmi_connector(connector);

...

-     struct hdmi *hdmi = hdmi_connector->hdmi; -     const struct hdmi_platform_config *config = hdmi->config; -     struct msm_drm_private *priv = connector->dev->dev_private; -     struct msm_kms *kms = priv->kms; -     long actual, requested;

-     requested = 1000 * mode->clock; -     actual = kms->funcs->round_pixclk(kms, -                     requested, hdmi_connector->hdmi->encoder);

-     /* for mdp5/apq8074, we manage our own pixel clk (as opposed to -      * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder -      * instead): -      */ -     if (config->pwr_clk_cnt > 0) -             actual = clk_round_rate(hdmi->pwr_clks[0], actual);

-     DBG("requested=%ld, actual=%ld", requested, actual);

-     if (actual != requested) -             return MODE_CLOCK_RANGE;

-     return 0; -}

-static const struct drm_connector_funcs hdmi_connector_funcs = { -     .detect = hdmi_connector_detect, -     .fill_modes = drm_helper_probe_single_connector_modes, -     .destroy = hdmi_connector_destroy, -     .reset = drm_atomic_helper_connector_reset, -     .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, -     .atomic_destroy_state =

drm_atomic_helper_connector_destroy_state,

...

-};

-static const struct drm_connector_helper_funcs msm_hdmi_connector_helper_funcs = { -     .get_modes = msm_hdmi_connector_get_modes, -     .mode_valid = msm_hdmi_connector_mode_valid, -};

-/* initialize connector */ -struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi) -{ -     struct drm_connector *connector = NULL; -     struct hdmi_connector *hdmi_connector;

-     hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL); -     if (!hdmi_connector) -             return ERR_PTR(-ENOMEM);

-     hdmi_connector->hdmi = hdmi; -     INIT_WORK(&hdmi_connector->hpd_work, msm_hdmi_hotplug_work);

-     connector = &hdmi_connector->base;

-     drm_connector_init_with_ddc(hdmi->dev, connector, -                                 &hdmi_connector_funcs, -                                 DRM_MODE_CONNECTOR_HDMIA, -                                 hdmi->i2c); -     drm_connector_helper_add(connector, &msm_hdmi_connector_helper_funcs);

-     connector->polled = DRM_CONNECTOR_POLL_CONNECT | -                     DRM_CONNECTOR_POLL_DISCONNECT;

-     connector->interlace_allowed = 0; -     connector->doublescan_allowed = 0;

-     drm_connector_attach_encoder(connector, hdmi->encoder);

-     return connector; -}

Hi Dmitry

On 12/6/2021 2:47 PM, Dmitry Baryshkov wrote:

On Mon, 6 Dec 2021 at 23:42, Abhinav Kumar quic_abhinavk@quicinc.com wrote:

...

On 11/25/2021 4:50 AM, Dmitry Baryshkov wrote:

...

On 19/10/2021 02:54, abhinavk@codeaurora.org wrote:

...

On 2021-10-16 07:21, Dmitry Baryshkov wrote:

...

On Sat, 16 Oct 2021 at 01:25, abhinavk@codeaurora.org wrote:

...

Hi Dmitry

On 2021-10-14 17:11, Dmitry Baryshkov wrote: > Merge old hdmi_bridge and hdmi_connector implementations. Use > drm_bridge_connector instead. > Can you please comment on the validation done on this change? Has basic bootup been verified on db820c as thats the only platform which shall use this.

Yes, this has been developed and validated on db820c

Thanks for confirming.

...

...

> Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org > --- > drivers/gpu/drm/msm/Makefile | 2 +- > drivers/gpu/drm/msm/hdmi/hdmi.c | 12 +- > drivers/gpu/drm/msm/hdmi/hdmi.h | 19 ++- > drivers/gpu/drm/msm/hdmi/hdmi_bridge.c | 81 ++++++++- > .../msm/hdmi/{hdmi_connector.c => hdmi_hpd.c} | 154 ++---------------- > 5 files changed, 109 insertions(+), 159 deletions(-) > rename drivers/gpu/drm/msm/hdmi/{hdmi_connector.c => hdmi_hpd.c} (62%) > > diff --git a/drivers/gpu/drm/msm/Makefile > b/drivers/gpu/drm/msm/Makefile > index 904535eda0c4..91b09cda8a9c 100644 > --- a/drivers/gpu/drm/msm/Makefile > +++ b/drivers/gpu/drm/msm/Makefile > @@ -19,7 +19,7 @@ msm-y := \ > hdmi/hdmi.o \ > hdmi/hdmi_audio.o \ > hdmi/hdmi_bridge.o \ > - hdmi/hdmi_connector.o \ > + hdmi/hdmi_hpd.o \ > hdmi/hdmi_i2c.o \ > hdmi/hdmi_phy.o \ > hdmi/hdmi_phy_8960.o \ > diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c > b/drivers/gpu/drm/msm/hdmi/hdmi.c > index db17a000d968..d1cf4df7188c 100644 > --- a/drivers/gpu/drm/msm/hdmi/hdmi.c > +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c > @@ -8,6 +8,8 @@ > #include <linux/of_irq.h> > #include <linux/of_gpio.h> > > +#include <drm/drm_bridge_connector.h> > + > #include <sound/hdmi-codec.h> > #include "hdmi.h" > > @@ -41,7 +43,7 @@ static irqreturn_t msm_hdmi_irq(int irq, void > *dev_id) > struct hdmi *hdmi = dev_id; > > /* Process HPD: */ > - msm_hdmi_connector_irq(hdmi->connector); > + msm_hdmi_hpd_irq(hdmi->bridge); > > /* Process DDC: */ > msm_hdmi_i2c_irq(hdmi->i2c); > @@ -283,7 +285,7 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi, > goto fail; > } > > - hdmi->connector = msm_hdmi_connector_init(hdmi); > + hdmi->connector = drm_bridge_connector_init(hdmi->dev, encoder); > if (IS_ERR(hdmi->connector)) { > ret = PTR_ERR(hdmi->connector); > DRM_DEV_ERROR(dev->dev, "failed to create HDMI connector: %d\n", > ret); > @@ -291,6 +293,8 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi, > goto fail; > } > > + drm_connector_attach_encoder(hdmi->connector, hdmi->encoder); > + > hdmi->irq = irq_of_parse_and_map(pdev->dev.of_node, 0); > if (hdmi->irq < 0) { > ret = hdmi->irq; > @@ -307,7 +311,9 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi, > goto fail; > } > > - ret = msm_hdmi_hpd_enable(hdmi->connector); > + drm_bridge_connector_enable_hpd(hdmi->connector); > + > + ret = msm_hdmi_hpd_enable(hdmi->bridge); > if (ret < 0) { > DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret); > goto fail; > diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h > b/drivers/gpu/drm/msm/hdmi/hdmi.h > index 82261078c6b1..736f348befb3 100644 > --- a/drivers/gpu/drm/msm/hdmi/hdmi.h > +++ b/drivers/gpu/drm/msm/hdmi/hdmi.h > @@ -114,6 +114,13 @@ struct hdmi_platform_config { > struct hdmi_gpio_data gpios[HDMI_MAX_NUM_GPIO]; > }; > > +struct hdmi_bridge { > + struct drm_bridge base; > + struct hdmi *hdmi; > + struct work_struct hpd_work; > +}; > +#define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base) > + > void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on); > > static inline void hdmi_write(struct hdmi *hdmi, u32 reg, u32 data) > @@ -230,13 +237,11 @@ void msm_hdmi_audio_set_sample_rate(struct hdmi > *hdmi, int rate); > struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi); > void msm_hdmi_bridge_destroy(struct drm_bridge *bridge); > > -/* > - * hdmi connector: > - */ > - > -void msm_hdmi_connector_irq(struct drm_connector *connector); > -struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi); > -int msm_hdmi_hpd_enable(struct drm_connector *connector); > +void msm_hdmi_hpd_irq(struct drm_bridge *bridge); > +enum drm_connector_status msm_hdmi_bridge_detect( > + struct drm_bridge *bridge); > +int msm_hdmi_hpd_enable(struct drm_bridge *bridge); > +void msm_hdmi_hpd_disable(struct hdmi_bridge *hdmi_bridge); > > /* > * i2c adapter for ddc: > diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c > b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c > index f04eb4a70f0d..211b73dddf65 100644 > --- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c > +++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c > @@ -5,17 +5,16 @@ > */ > > #include <linux/delay.h> > +#include <drm/drm_bridge_connector.h> > > +#include "msm_kms.h" > #include "hdmi.h" > > -struct hdmi_bridge { > - struct drm_bridge base; > - struct hdmi *hdmi; > -}; > -#define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base) > - > void msm_hdmi_bridge_destroy(struct drm_bridge *bridge) > { > + struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); > + > + msm_hdmi_hpd_disable(hdmi_bridge); > } > > static void msm_hdmi_power_on(struct drm_bridge *bridge) > @@ -251,14 +250,76 @@ static void msm_hdmi_bridge_mode_set(struct > drm_bridge *bridge, > msm_hdmi_audio_update(hdmi); > } > > +static struct edid *msm_hdmi_bridge_get_edid(struct drm_bridge > *bridge, > + struct drm_connector *connector) > +{ > + struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); > + struct hdmi *hdmi = hdmi_bridge->hdmi; > + struct edid *edid; > + uint32_t hdmi_ctrl; > + > + hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL); > + hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE); > + > + edid = drm_get_edid(connector, hdmi->i2c); > + > + hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl); > + > + hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid); > + > + return edid; > +} > + > +static enum drm_mode_status msm_hdmi_bridge_mode_valid(struct > drm_bridge *bridge, > + const struct drm_display_info *info, > + const struct drm_display_mode *mode) > +{ > + struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); > + struct hdmi *hdmi = hdmi_bridge->hdmi; > + const struct hdmi_platform_config *config = hdmi->config; > + struct msm_drm_private *priv = bridge->dev->dev_private; > + struct msm_kms *kms = priv->kms; > + long actual, requested; > + > + requested = 1000 * mode->clock; > + actual = kms->funcs->round_pixclk(kms, > + requested, hdmi_bridge->hdmi->encoder); > + > + /* for mdp5/apq8074, we manage our own pixel clk (as opposed to > + * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder > + * instead): > + */ > + if (config->pwr_clk_cnt > 0) > + actual = clk_round_rate(hdmi->pwr_clks[0], actual); > + > + DBG("requested=%ld, actual=%ld", requested, actual); > + > + if (actual != requested) > + return MODE_CLOCK_RANGE; > + > + return 0; > +} > + > static const struct drm_bridge_funcs msm_hdmi_bridge_funcs = { > .pre_enable = msm_hdmi_bridge_pre_enable, > .enable = msm_hdmi_bridge_enable, > .disable = msm_hdmi_bridge_disable, > .post_disable = msm_hdmi_bridge_post_disable, > .mode_set = msm_hdmi_bridge_mode_set, > + .mode_valid = msm_hdmi_bridge_mode_valid, > + .get_edid = msm_hdmi_bridge_get_edid, > + .detect = msm_hdmi_bridge_detect, > }; > > +static void > +msm_hdmi_hotplug_work(struct work_struct *work) > +{ > + struct hdmi_bridge *hdmi_bridge = > + container_of(work, struct hdmi_bridge, hpd_work); > + struct drm_bridge *bridge = &hdmi_bridge->base; > + > + drm_bridge_hpd_notify(bridge, drm_bridge_detect(bridge)); > +} > > /* initialize bridge */ > struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi) > @@ -275,11 +336,17 @@ struct drm_bridge *msm_hdmi_bridge_init(struct > hdmi *hdmi) > } > > hdmi_bridge->hdmi = hdmi; > + INIT_WORK(&hdmi_bridge->hpd_work, msm_hdmi_hotplug_work); > > bridge = &hdmi_bridge->base; > bridge->funcs = &msm_hdmi_bridge_funcs; > + bridge->ddc = hdmi->i2c; > + bridge->type = DRM_MODE_CONNECTOR_HDMIA; > + bridge->ops = DRM_BRIDGE_OP_HPD | > + DRM_BRIDGE_OP_DETECT | > + DRM_BRIDGE_OP_EDID;

Please correct me if wrong here. When we set DRM_BRIDGE_OP_HPD, it means we need to set the hpd_enable and hpd_disable callbacks. I am not seeing those being set.

707 * @DRM_BRIDGE_OP_HPD: The bridge can detect hot-plug and hot-unplug 708 * without requiring polling. Bridges that set this flag shall 709 * implement the &drm_bridge_funcs->hpd_enable and 710 * &drm_bridge_funcs->hpd_disable callbacks if they support enabling 711 * and disabling hot-plug detection dynamically. 712 */ 713 DRM_BRIDGE_OP_HPD = BIT(2),

So when drm_bridge_connector_enable_hpd() is called, its a no-op as hpd_enable() callback is not set.

msm_hdmi_hpd_enable() actually enables the HPD logic which is getting called from msm_hdmi_modeset_init() and not from hpd_enable().

In that case, do we need to set DRM_BRIDGE_OP_HPD for this? If we dont, what will happen?

Without this flag, the drm_bridge_connector will not know that this bridge is capable of generating HPD events on its own, ending up with polling implementation. See drm_bridge_connector_init(), drm_helper_hpd_irq_event(), etc.

Thanks for the details. Then, as per the documentation on the DRM_BRIDGE_OP_HPD, shouldnt we also assign msm_hdmi_hpd_enable to hpd_enable callback? Since we are already calling drm_bridge_connector_enable_hpd(), that should take care of calling it using the callback then.

Similarly, you can assign msm_hdmi_hpd_disable to hpd_disable op and then call drm_bridge_connector_disable_hpd() in those places.

Since that would be a change in the functionality, I'd prefer to have that in a separate patch. It looks like a nice cleanup idea, so I'd implement that at some point.

...

I didnt follow this part. Why would there be a change in functionality? You are only going to assign the hpd_enable/hpd_disable callbacks. And replace the calls msm_hdmi_hpd_enable/msm_hdmi_hpd_disable with drm_bridge_connector_enable_hpd()/drm_bridge_connector_disable_hpd() within the driver. AFAICT, noone else is going to issue the enable/disable so it should not affect functionality.

...

That way, functionality remains intact and we follow the documentation.

...

...

...

...

> > - ret = drm_bridge_attach(hdmi->encoder, bridge, NULL, 0); > + ret = drm_bridge_attach(hdmi->encoder, bridge, NULL, > DRM_BRIDGE_ATTACH_NO_CONNECTOR); > if (ret) > goto fail; > > diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c > b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c > similarity index 62% > rename from drivers/gpu/drm/msm/hdmi/hdmi_connector.c > rename to drivers/gpu/drm/msm/hdmi/hdmi_hpd.c > index a7f729cdec7b..1cda7bf23b3b 100644 > --- a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c > +++ b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c > @@ -11,13 +11,6 @@ > #include "msm_kms.h" > #include "hdmi.h" > > -struct hdmi_connector { > - struct drm_connector base; > - struct hdmi *hdmi; > - struct work_struct hpd_work; > -}; > -#define to_hdmi_connector(x) container_of(x, struct hdmi_connector, > base) > - > static void msm_hdmi_phy_reset(struct hdmi *hdmi) > { > unsigned int val; > @@ -139,10 +132,10 @@ static void enable_hpd_clocks(struct hdmi *hdmi, > bool enable) > } > } > > -int msm_hdmi_hpd_enable(struct drm_connector *connector) > +int msm_hdmi_hpd_enable(struct drm_bridge *bridge) > { > - struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); > - struct hdmi *hdmi = hdmi_connector->hdmi; > + struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); > + struct hdmi *hdmi = hdmi_bridge->hdmi; > const struct hdmi_platform_config *config = hdmi->config; > struct device *dev = &hdmi->pdev->dev; > uint32_t hpd_ctrl; > @@ -199,9 +192,9 @@ int msm_hdmi_hpd_enable(struct drm_connector > *connector) > return ret; > } > > -static void hdp_disable(struct hdmi_connector *hdmi_connector) > +void msm_hdmi_hpd_disable(struct hdmi_bridge *hdmi_bridge) > { > - struct hdmi *hdmi = hdmi_connector->hdmi; > + struct hdmi *hdmi = hdmi_bridge->hdmi; > const struct hdmi_platform_config *config = hdmi->config; > struct device *dev = &hdmi->pdev->dev; > int ret; > @@ -227,19 +220,10 @@ static void hdp_disable(struct hdmi_connector > *hdmi_connector) > dev_warn(dev, "failed to disable hpd regulator: %d\n", ret); > } > > -static void > -msm_hdmi_hotplug_work(struct work_struct *work) > -{ > - struct hdmi_connector *hdmi_connector = > - container_of(work, struct hdmi_connector, hpd_work); > - struct drm_connector *connector = &hdmi_connector->base; > - drm_helper_hpd_irq_event(connector->dev); > -} > - > -void msm_hdmi_connector_irq(struct drm_connector *connector) > +void msm_hdmi_hpd_irq(struct drm_bridge *bridge) > { > - struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); > - struct hdmi *hdmi = hdmi_connector->hdmi; > + struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); > + struct hdmi *hdmi = hdmi_bridge->hdmi; > uint32_t hpd_int_status, hpd_int_ctrl; > > /* Process HPD: */ > @@ -262,7 +246,7 @@ void msm_hdmi_connector_irq(struct drm_connector > *connector) > hpd_int_ctrl |= HDMI_HPD_INT_CTRL_INT_CONNECT; > hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl); > > - queue_work(hdmi->workq, &hdmi_connector->hpd_work); > + queue_work(hdmi->workq, &hdmi_bridge->hpd_work); > } > } > > @@ -293,11 +277,11 @@ static enum drm_connector_status > detect_gpio(struct hdmi *hdmi) > connector_status_disconnected; > } > > -static enum drm_connector_status hdmi_connector_detect( > - struct drm_connector *connector, bool force) > +enum drm_connector_status msm_hdmi_bridge_detect( > + struct drm_bridge *bridge) > { > - struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); > - struct hdmi *hdmi = hdmi_connector->hdmi; > + struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); > + struct hdmi *hdmi = hdmi_bridge->hdmi; > const struct hdmi_platform_config *config = hdmi->config; > struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX]; > enum drm_connector_status stat_gpio, stat_reg; > @@ -331,115 +315,3 @@ static enum drm_connector_status > hdmi_connector_detect( > > return stat_gpio; > } > - > -static void hdmi_connector_destroy(struct drm_connector *connector) > -{ > - struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); > - > - hdp_disable(hdmi_connector); > - > - drm_connector_cleanup(connector); > - > - kfree(hdmi_connector); > -} > - > -static int msm_hdmi_connector_get_modes(struct drm_connector > *connector) > -{ > - struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); > - struct hdmi *hdmi = hdmi_connector->hdmi; > - struct edid *edid; > - uint32_t hdmi_ctrl; > - int ret = 0; > - > - hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL); > - hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE); > - > - edid = drm_get_edid(connector, hdmi->i2c); > - > - hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl); > - > - hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid); > - drm_connector_update_edid_property(connector, edid); > - > - if (edid) { > - ret = drm_add_edid_modes(connector, edid); > - kfree(edid); > - } > - > - return ret; > -} > - > -static int msm_hdmi_connector_mode_valid(struct drm_connector > *connector, > - struct drm_display_mode *mode) > -{ > - struct hdmi_connector *hdmi_connector = to_hdmi_connector(connector); > - struct hdmi *hdmi = hdmi_connector->hdmi; > - const struct hdmi_platform_config *config = hdmi->config; > - struct msm_drm_private *priv = connector->dev->dev_private; > - struct msm_kms *kms = priv->kms; > - long actual, requested; > - > - requested = 1000 * mode->clock; > - actual = kms->funcs->round_pixclk(kms, > - requested, hdmi_connector->hdmi->encoder); > - > - /* for mdp5/apq8074, we manage our own pixel clk (as opposed to > - * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder > - * instead): > - */ > - if (config->pwr_clk_cnt > 0) > - actual = clk_round_rate(hdmi->pwr_clks[0], actual); > - > - DBG("requested=%ld, actual=%ld", requested, actual); > - > - if (actual != requested) > - return MODE_CLOCK_RANGE; > - > - return 0; > -} > - > -static const struct drm_connector_funcs hdmi_connector_funcs = { > - .detect = hdmi_connector_detect, > - .fill_modes = drm_helper_probe_single_connector_modes, > - .destroy = hdmi_connector_destroy, > - .reset = drm_atomic_helper_connector_reset, > - .atomic_duplicate_state = > drm_atomic_helper_connector_duplicate_state, > - .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, > -}; > - > -static const struct drm_connector_helper_funcs > msm_hdmi_connector_helper_funcs = { > - .get_modes = msm_hdmi_connector_get_modes, > - .mode_valid = msm_hdmi_connector_mode_valid, > -}; > - > -/* initialize connector */ > -struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi) > -{ > - struct drm_connector *connector = NULL; > - struct hdmi_connector *hdmi_connector; > - > - hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL); > - if (!hdmi_connector) > - return ERR_PTR(-ENOMEM); > - > - hdmi_connector->hdmi = hdmi; > - INIT_WORK(&hdmi_connector->hpd_work, msm_hdmi_hotplug_work); > - > - connector = &hdmi_connector->base; > - > - drm_connector_init_with_ddc(hdmi->dev, connector, > - &hdmi_connector_funcs, > - DRM_MODE_CONNECTOR_HDMIA, > - hdmi->i2c); > - drm_connector_helper_add(connector, > &msm_hdmi_connector_helper_funcs); > - > - connector->polled = DRM_CONNECTOR_POLL_CONNECT | > - DRM_CONNECTOR_POLL_DISCONNECT; > - > - connector->interlace_allowed = 0; > - connector->doublescan_allowed = 0; > - > - drm_connector_attach_encoder(connector, hdmi->encoder); > - > - return connector; > -}

On 12/6/2021 4:21 PM, Dmitry Baryshkov wrote:

On Tue, 7 Dec 2021 at 01:58, Abhinav Kumar quic_abhinavk@quicinc.com wrote:

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Hi Dmitry

On 12/6/2021 2:47 PM, Dmitry Baryshkov wrote:

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On Mon, 6 Dec 2021 at 23:42, Abhinav Kumar quic_abhinavk@quicinc.com wrote:

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On 11/25/2021 4:50 AM, Dmitry Baryshkov wrote:

...

On 19/10/2021 02:54, abhinavk@codeaurora.org wrote:

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On 2021-10-16 07:21, Dmitry Baryshkov wrote: > On Sat, 16 Oct 2021 at 01:25, abhinavk@codeaurora.org wrote: >> >> Hi Dmitry >> >> On 2021-10-14 17:11, Dmitry Baryshkov wrote: >>> Merge old hdmi_bridge and hdmi_connector implementations. Use >>> drm_bridge_connector instead. >>> >> Can you please comment on the validation done on this change? >> Has basic bootup been verified on db820c as thats the only platform >> which shall use this. > > Yes, this has been developed and validated on db820c Thanks for confirming. > >> >>> Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org >>> --- >>> drivers/gpu/drm/msm/Makefile | 2 +- >>> drivers/gpu/drm/msm/hdmi/hdmi.c | 12 +- >>> drivers/gpu/drm/msm/hdmi/hdmi.h | 19 ++- >>> drivers/gpu/drm/msm/hdmi/hdmi_bridge.c | 81 ++++++++- >>> .../msm/hdmi/{hdmi_connector.c => hdmi_hpd.c} | 154 >> ++---------------- >>> 5 files changed, 109 insertions(+), 159 deletions(-) >>> rename drivers/gpu/drm/msm/hdmi/{hdmi_connector.c => hdmi_hpd.c} >> (62%) >>> >>> diff --git a/drivers/gpu/drm/msm/Makefile >>> b/drivers/gpu/drm/msm/Makefile >>> index 904535eda0c4..91b09cda8a9c 100644 >>> --- a/drivers/gpu/drm/msm/Makefile >>> +++ b/drivers/gpu/drm/msm/Makefile >>> @@ -19,7 +19,7 @@ msm-y := \ >>> hdmi/hdmi.o \ >>> hdmi/hdmi_audio.o \ >>> hdmi/hdmi_bridge.o \ >>> - hdmi/hdmi_connector.o \ >>> + hdmi/hdmi_hpd.o \ >>> hdmi/hdmi_i2c.o \ >>> hdmi/hdmi_phy.o \ >>> hdmi/hdmi_phy_8960.o \ >>> diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c >>> b/drivers/gpu/drm/msm/hdmi/hdmi.c >>> index db17a000d968..d1cf4df7188c 100644 >>> --- a/drivers/gpu/drm/msm/hdmi/hdmi.c >>> +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c >>> @@ -8,6 +8,8 @@ >>> #include <linux/of_irq.h> >>> #include <linux/of_gpio.h> >>> >>> +#include <drm/drm_bridge_connector.h> >>> + >>> #include <sound/hdmi-codec.h> >>> #include "hdmi.h" >>> >>> @@ -41,7 +43,7 @@ static irqreturn_t msm_hdmi_irq(int irq, void >>> *dev_id) >>> struct hdmi *hdmi = dev_id; >>> >>> /* Process HPD: */ >>> - msm_hdmi_connector_irq(hdmi->connector); >>> + msm_hdmi_hpd_irq(hdmi->bridge); >>> >>> /* Process DDC: */ >>> msm_hdmi_i2c_irq(hdmi->i2c); >>> @@ -283,7 +285,7 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi, >>> goto fail; >>> } >>> >>> - hdmi->connector = msm_hdmi_connector_init(hdmi); >>> + hdmi->connector = drm_bridge_connector_init(hdmi->dev, >> encoder); >>> if (IS_ERR(hdmi->connector)) { >>> ret = PTR_ERR(hdmi->connector); >>> DRM_DEV_ERROR(dev->dev, "failed to create HDMI >> connector: %d\n", >>> ret); >>> @@ -291,6 +293,8 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi, >>> goto fail; >>> } >>> >>> + drm_connector_attach_encoder(hdmi->connector, hdmi->encoder); >>> + >>> hdmi->irq = irq_of_parse_and_map(pdev->dev.of_node, 0); >>> if (hdmi->irq < 0) { >>> ret = hdmi->irq; >>> @@ -307,7 +311,9 @@ int msm_hdmi_modeset_init(struct hdmi *hdmi, >>> goto fail; >>> } >>> >>> - ret = msm_hdmi_hpd_enable(hdmi->connector); >>> + drm_bridge_connector_enable_hpd(hdmi->connector); >>> + >>> + ret = msm_hdmi_hpd_enable(hdmi->bridge); >>> if (ret < 0) { >>> DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable >> HPD: %d\n", ret); >>> goto fail; >>> diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h >>> b/drivers/gpu/drm/msm/hdmi/hdmi.h >>> index 82261078c6b1..736f348befb3 100644 >>> --- a/drivers/gpu/drm/msm/hdmi/hdmi.h >>> +++ b/drivers/gpu/drm/msm/hdmi/hdmi.h >>> @@ -114,6 +114,13 @@ struct hdmi_platform_config { >>> struct hdmi_gpio_data gpios[HDMI_MAX_NUM_GPIO]; >>> }; >>> >>> +struct hdmi_bridge { >>> + struct drm_bridge base; >>> + struct hdmi *hdmi; >>> + struct work_struct hpd_work; >>> +}; >>> +#define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base) >>> + >>> void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on); >>> >>> static inline void hdmi_write(struct hdmi *hdmi, u32 reg, u32 data) >>> @@ -230,13 +237,11 @@ void msm_hdmi_audio_set_sample_rate(struct hdmi >>> *hdmi, int rate); >>> struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi); >>> void msm_hdmi_bridge_destroy(struct drm_bridge *bridge); >>> >>> -/* >>> - * hdmi connector: >>> - */ >>> - >>> -void msm_hdmi_connector_irq(struct drm_connector *connector); >>> -struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi); >>> -int msm_hdmi_hpd_enable(struct drm_connector *connector); >>> +void msm_hdmi_hpd_irq(struct drm_bridge *bridge); >>> +enum drm_connector_status msm_hdmi_bridge_detect( >>> + struct drm_bridge *bridge); >>> +int msm_hdmi_hpd_enable(struct drm_bridge *bridge); >>> +void msm_hdmi_hpd_disable(struct hdmi_bridge *hdmi_bridge); >>> >>> /* >>> * i2c adapter for ddc: >>> diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c >>> b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c >>> index f04eb4a70f0d..211b73dddf65 100644 >>> --- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c >>> +++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c >>> @@ -5,17 +5,16 @@ >>> */ >>> >>> #include <linux/delay.h> >>> +#include <drm/drm_bridge_connector.h> >>> >>> +#include "msm_kms.h" >>> #include "hdmi.h" >>> >>> -struct hdmi_bridge { >>> - struct drm_bridge base; >>> - struct hdmi *hdmi; >>> -}; >>> -#define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base) >>> - >>> void msm_hdmi_bridge_destroy(struct drm_bridge *bridge) >>> { >>> + struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); >>> + >>> + msm_hdmi_hpd_disable(hdmi_bridge); >>> } >>> >>> static void msm_hdmi_power_on(struct drm_bridge *bridge) >>> @@ -251,14 +250,76 @@ static void msm_hdmi_bridge_mode_set(struct >>> drm_bridge *bridge, >>> msm_hdmi_audio_update(hdmi); >>> } >>> >>> +static struct edid *msm_hdmi_bridge_get_edid(struct drm_bridge >>> *bridge, >>> + struct drm_connector *connector) >>> +{ >>> + struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); >>> + struct hdmi *hdmi = hdmi_bridge->hdmi; >>> + struct edid *edid; >>> + uint32_t hdmi_ctrl; >>> + >>> + hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL); >>> + hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE); >>> + >>> + edid = drm_get_edid(connector, hdmi->i2c); >>> + >>> + hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl); >>> + >>> + hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid); >>> + >>> + return edid; >>> +} >>> + >>> +static enum drm_mode_status msm_hdmi_bridge_mode_valid(struct >>> drm_bridge *bridge, >>> + const struct drm_display_info *info, >>> + const struct drm_display_mode *mode) >>> +{ >>> + struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); >>> + struct hdmi *hdmi = hdmi_bridge->hdmi; >>> + const struct hdmi_platform_config *config = hdmi->config; >>> + struct msm_drm_private *priv = bridge->dev->dev_private; >>> + struct msm_kms *kms = priv->kms; >>> + long actual, requested; >>> + >>> + requested = 1000 * mode->clock; >>> + actual = kms->funcs->round_pixclk(kms, >>> + requested, hdmi_bridge->hdmi->encoder); >>> + >>> + /* for mdp5/apq8074, we manage our own pixel clk (as opposed to >>> + * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder >>> + * instead): >>> + */ >>> + if (config->pwr_clk_cnt > 0) >>> + actual = clk_round_rate(hdmi->pwr_clks[0], actual); >>> + >>> + DBG("requested=%ld, actual=%ld", requested, actual); >>> + >>> + if (actual != requested) >>> + return MODE_CLOCK_RANGE; >>> + >>> + return 0; >>> +} >>> + >>> static const struct drm_bridge_funcs msm_hdmi_bridge_funcs = { >>> .pre_enable = msm_hdmi_bridge_pre_enable, >>> .enable = msm_hdmi_bridge_enable, >>> .disable = msm_hdmi_bridge_disable, >>> .post_disable = msm_hdmi_bridge_post_disable, >>> .mode_set = msm_hdmi_bridge_mode_set, >>> + .mode_valid = msm_hdmi_bridge_mode_valid, >>> + .get_edid = msm_hdmi_bridge_get_edid, >>> + .detect = msm_hdmi_bridge_detect, >>> }; >>> >>> +static void >>> +msm_hdmi_hotplug_work(struct work_struct *work) >>> +{ >>> + struct hdmi_bridge *hdmi_bridge = >>> + container_of(work, struct hdmi_bridge, hpd_work); >>> + struct drm_bridge *bridge = &hdmi_bridge->base; >>> + >>> + drm_bridge_hpd_notify(bridge, drm_bridge_detect(bridge)); >>> +} >>> >>> /* initialize bridge */ >>> struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi) >>> @@ -275,11 +336,17 @@ struct drm_bridge *msm_hdmi_bridge_init(struct >>> hdmi *hdmi) >>> } >>> >>> hdmi_bridge->hdmi = hdmi; >>> + INIT_WORK(&hdmi_bridge->hpd_work, msm_hdmi_hotplug_work); >>> >>> bridge = &hdmi_bridge->base; >>> bridge->funcs = &msm_hdmi_bridge_funcs; >>> + bridge->ddc = hdmi->i2c; >>> + bridge->type = DRM_MODE_CONNECTOR_HDMIA; >>> + bridge->ops = DRM_BRIDGE_OP_HPD | >>> + DRM_BRIDGE_OP_DETECT | >>> + DRM_BRIDGE_OP_EDID; Please correct me if wrong here. When we set DRM_BRIDGE_OP_HPD, it means we need to set the hpd_enable and hpd_disable callbacks. I am not seeing those being set.

707 * @DRM_BRIDGE_OP_HPD: The bridge can detect hot-plug and hot-unplug 708 * without requiring polling. Bridges that set this flag shall 709 * implement the &drm_bridge_funcs->hpd_enable and 710 * &drm_bridge_funcs->hpd_disable callbacks if they support enabling 711 * and disabling hot-plug detection dynamically. 712 */ 713 DRM_BRIDGE_OP_HPD = BIT(2),

So when drm_bridge_connector_enable_hpd() is called, its a no-op as hpd_enable() callback is not set.

msm_hdmi_hpd_enable() actually enables the HPD logic which is getting called from msm_hdmi_modeset_init() and not from hpd_enable().

In that case, do we need to set DRM_BRIDGE_OP_HPD for this? If we dont, what will happen?

Without this flag, the drm_bridge_connector will not know that this bridge is capable of generating HPD events on its own, ending up with polling implementation. See drm_bridge_connector_init(), drm_helper_hpd_irq_event(), etc.

Thanks for the details. Then, as per the documentation on the DRM_BRIDGE_OP_HPD, shouldnt we also assign msm_hdmi_hpd_enable to hpd_enable callback? Since we are already calling drm_bridge_connector_enable_hpd(), that should take care of calling it using the callback then.

Similarly, you can assign msm_hdmi_hpd_disable to hpd_disable op and then call drm_bridge_connector_disable_hpd() in those places.

Since that would be a change in the functionality, I'd prefer to have that in a separate patch. It looks like a nice cleanup idea, so I'd implement that at some point.

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I didnt follow this part. Why would there be a change in functionality? You are only going to assign the hpd_enable/hpd_disable callbacks. And replace the calls msm_hdmi_hpd_enable/msm_hdmi_hpd_disable with drm_bridge_connector_enable_hpd()/drm_bridge_connector_disable_hpd() within the driver. AFAICT, noone else is going to issue the enable/disable so it should not affect functionality.

You have described the change in the functionality: to use hpd_enable/_disable callbacks. Since we were not using them up to now, I'd like to keep that change separate.

I really dont think the change is big enough to push it out to another patch. But if you insist, Reviewed-by: Abhinav Kumar quic_abhinavk@quicinc.com

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That way, functionality remains intact and we follow the documentation.

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>>> >>> - ret = drm_bridge_attach(hdmi->encoder, bridge, NULL, 0); >>> + ret = drm_bridge_attach(hdmi->encoder, bridge, NULL, >>> DRM_BRIDGE_ATTACH_NO_CONNECTOR); >>> if (ret) >>> goto fail; >>> >>> diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c >>> b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c >>> similarity index 62% >>> rename from drivers/gpu/drm/msm/hdmi/hdmi_connector.c >>> rename to drivers/gpu/drm/msm/hdmi/hdmi_hpd.c >>> index a7f729cdec7b..1cda7bf23b3b 100644 >>> --- a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c >>> +++ b/drivers/gpu/drm/msm/hdmi/hdmi_hpd.c >>> @@ -11,13 +11,6 @@ >>> #include "msm_kms.h" >>> #include "hdmi.h" >>> >>> -struct hdmi_connector { >>> - struct drm_connector base; >>> - struct hdmi *hdmi; >>> - struct work_struct hpd_work; >>> -}; >>> -#define to_hdmi_connector(x) container_of(x, struct hdmi_connector, >>> base) >>> - >>> static void msm_hdmi_phy_reset(struct hdmi *hdmi) >>> { >>> unsigned int val; >>> @@ -139,10 +132,10 @@ static void enable_hpd_clocks(struct hdmi >> *hdmi, >>> bool enable) >>> } >>> } >>> >>> -int msm_hdmi_hpd_enable(struct drm_connector *connector) >>> +int msm_hdmi_hpd_enable(struct drm_bridge *bridge) >>> { >>> - struct hdmi_connector *hdmi_connector = >> to_hdmi_connector(connector); >>> - struct hdmi *hdmi = hdmi_connector->hdmi; >>> + struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); >>> + struct hdmi *hdmi = hdmi_bridge->hdmi; >>> const struct hdmi_platform_config *config = hdmi->config; >>> struct device *dev = &hdmi->pdev->dev; >>> uint32_t hpd_ctrl; >>> @@ -199,9 +192,9 @@ int msm_hdmi_hpd_enable(struct drm_connector >>> *connector) >>> return ret; >>> } >>> >>> -static void hdp_disable(struct hdmi_connector *hdmi_connector) >>> +void msm_hdmi_hpd_disable(struct hdmi_bridge *hdmi_bridge) >>> { >>> - struct hdmi *hdmi = hdmi_connector->hdmi; >>> + struct hdmi *hdmi = hdmi_bridge->hdmi; >>> const struct hdmi_platform_config *config = hdmi->config; >>> struct device *dev = &hdmi->pdev->dev; >>> int ret; >>> @@ -227,19 +220,10 @@ static void hdp_disable(struct hdmi_connector >>> *hdmi_connector) >>> dev_warn(dev, "failed to disable hpd regulator: >> %d\n", ret); >>> } >>> >>> -static void >>> -msm_hdmi_hotplug_work(struct work_struct *work) >>> -{ >>> - struct hdmi_connector *hdmi_connector = >>> - container_of(work, struct hdmi_connector, hpd_work); >>> - struct drm_connector *connector = &hdmi_connector->base; >>> - drm_helper_hpd_irq_event(connector->dev); >>> -} >>> - >>> -void msm_hdmi_connector_irq(struct drm_connector *connector) >>> +void msm_hdmi_hpd_irq(struct drm_bridge *bridge) >>> { >>> - struct hdmi_connector *hdmi_connector = >> to_hdmi_connector(connector); >>> - struct hdmi *hdmi = hdmi_connector->hdmi; >>> + struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); >>> + struct hdmi *hdmi = hdmi_bridge->hdmi; >>> uint32_t hpd_int_status, hpd_int_ctrl; >>> >>> /* Process HPD: */ >>> @@ -262,7 +246,7 @@ void msm_hdmi_connector_irq(struct drm_connector >>> *connector) >>> hpd_int_ctrl |= HDMI_HPD_INT_CTRL_INT_CONNECT; >>> hdmi_write(hdmi, REG_HDMI_HPD_INT_CTRL, hpd_int_ctrl); >>> >>> - queue_work(hdmi->workq, &hdmi_connector->hpd_work); >>> + queue_work(hdmi->workq, &hdmi_bridge->hpd_work); >>> } >>> } >>> >>> @@ -293,11 +277,11 @@ static enum drm_connector_status >>> detect_gpio(struct hdmi *hdmi) >>> connector_status_disconnected; >>> } >>> >>> -static enum drm_connector_status hdmi_connector_detect( >>> - struct drm_connector *connector, bool force) >>> +enum drm_connector_status msm_hdmi_bridge_detect( >>> + struct drm_bridge *bridge) >>> { >>> - struct hdmi_connector *hdmi_connector = >> to_hdmi_connector(connector); >>> - struct hdmi *hdmi = hdmi_connector->hdmi; >>> + struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); >>> + struct hdmi *hdmi = hdmi_bridge->hdmi; >>> const struct hdmi_platform_config *config = hdmi->config; >>> struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX]; >>> enum drm_connector_status stat_gpio, stat_reg; >>> @@ -331,115 +315,3 @@ static enum drm_connector_status >>> hdmi_connector_detect( >>> >>> return stat_gpio; >>> } >>> - >>> -static void hdmi_connector_destroy(struct drm_connector *connector) >>> -{ >>> - struct hdmi_connector *hdmi_connector = >> to_hdmi_connector(connector); >>> - >>> - hdp_disable(hdmi_connector); >>> - >>> - drm_connector_cleanup(connector); >>> - >>> - kfree(hdmi_connector); >>> -} >>> - >>> -static int msm_hdmi_connector_get_modes(struct drm_connector >>> *connector) >>> -{ >>> - struct hdmi_connector *hdmi_connector = >> to_hdmi_connector(connector); >>> - struct hdmi *hdmi = hdmi_connector->hdmi; >>> - struct edid *edid; >>> - uint32_t hdmi_ctrl; >>> - int ret = 0; >>> - >>> - hdmi_ctrl = hdmi_read(hdmi, REG_HDMI_CTRL); >>> - hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl | HDMI_CTRL_ENABLE); >>> - >>> - edid = drm_get_edid(connector, hdmi->i2c); >>> - >>> - hdmi_write(hdmi, REG_HDMI_CTRL, hdmi_ctrl); >>> - >>> - hdmi->hdmi_mode = drm_detect_hdmi_monitor(edid); >>> - drm_connector_update_edid_property(connector, edid); >>> - >>> - if (edid) { >>> - ret = drm_add_edid_modes(connector, edid); >>> - kfree(edid); >>> - } >>> - >>> - return ret; >>> -} >>> - >>> -static int msm_hdmi_connector_mode_valid(struct drm_connector >>> *connector, >>> - struct drm_display_mode *mode) >>> -{ >>> - struct hdmi_connector *hdmi_connector = >> to_hdmi_connector(connector); >>> - struct hdmi *hdmi = hdmi_connector->hdmi; >>> - const struct hdmi_platform_config *config = hdmi->config; >>> - struct msm_drm_private *priv = connector->dev->dev_private; >>> - struct msm_kms *kms = priv->kms; >>> - long actual, requested; >>> - >>> - requested = 1000 * mode->clock; >>> - actual = kms->funcs->round_pixclk(kms, >>> - requested, hdmi_connector->hdmi->encoder); >>> - >>> - /* for mdp5/apq8074, we manage our own pixel clk (as opposed to >>> - * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder >>> - * instead): >>> - */ >>> - if (config->pwr_clk_cnt > 0) >>> - actual = clk_round_rate(hdmi->pwr_clks[0], actual); >>> - >>> - DBG("requested=%ld, actual=%ld", requested, actual); >>> - >>> - if (actual != requested) >>> - return MODE_CLOCK_RANGE; >>> - >>> - return 0; >>> -} >>> - >>> -static const struct drm_connector_funcs hdmi_connector_funcs = { >>> - .detect = hdmi_connector_detect, >>> - .fill_modes = drm_helper_probe_single_connector_modes, >>> - .destroy = hdmi_connector_destroy, >>> - .reset = drm_atomic_helper_connector_reset, >>> - .atomic_duplicate_state = >>> drm_atomic_helper_connector_duplicate_state, >>> - .atomic_destroy_state = >> drm_atomic_helper_connector_destroy_state, >>> -}; >>> - >>> -static const struct drm_connector_helper_funcs >>> msm_hdmi_connector_helper_funcs = { >>> - .get_modes = msm_hdmi_connector_get_modes, >>> - .mode_valid = msm_hdmi_connector_mode_valid, >>> -}; >>> - >>> -/* initialize connector */ >>> -struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi) >>> -{ >>> - struct drm_connector *connector = NULL; >>> - struct hdmi_connector *hdmi_connector; >>> - >>> - hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL); >>> - if (!hdmi_connector) >>> - return ERR_PTR(-ENOMEM); >>> - >>> - hdmi_connector->hdmi = hdmi; >>> - INIT_WORK(&hdmi_connector->hpd_work, msm_hdmi_hotplug_work); >>> - >>> - connector = &hdmi_connector->base; >>> - >>> - drm_connector_init_with_ddc(hdmi->dev, connector, >>> - &hdmi_connector_funcs, >>> - DRM_MODE_CONNECTOR_HDMIA, >>> - hdmi->i2c); >>> - drm_connector_helper_add(connector, >>> &msm_hdmi_connector_helper_funcs); >>> - >>> - connector->polled = DRM_CONNECTOR_POLL_CONNECT | >>> - DRM_CONNECTOR_POLL_DISCONNECT; >>> - >>> - connector->interlace_allowed = 0; >>> - connector->doublescan_allowed = 0; >>> - >>> - drm_connector_attach_encoder(connector, hdmi->encoder); >>> - >>> - return connector; >>> -}