[v4,07/11] drm/meson: meson_dw_hdmi: add bridge and switch to drm_bridge_funcs
diff mbox series

Message ID 20200206191834.6125-8-narmstrong@baylibre.com
State Superseded
Delegated to: Neil Armstrong
Headers show
Series
  • drm/bridge: dw-hdmi: implement bus-format negotiation and YUV420 support
Related show

Commit Message

Neil Armstrong Feb. 6, 2020, 7:18 p.m. UTC
Switch the dw-hdmi driver to drm_bridge_funcs by implementing a new local
bridge, connecting it to the dw-hdmi bridge, then implement the
atomic_get_input_bus_fmts/atomic_get_output_bus_fmts.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 drivers/gpu/drm/meson/meson_dw_hdmi.c | 105 +++++++++++++++++++++-----
 1 file changed, 85 insertions(+), 20 deletions(-)

Comments

Boris Brezillon Feb. 7, 2020, 2:57 p.m. UTC | #1
On Thu,  6 Feb 2020 20:18:30 +0100
Neil Armstrong <narmstrong@baylibre.com> wrote:

> Switch the dw-hdmi driver to drm_bridge_funcs by implementing a new local
> bridge, connecting it to the dw-hdmi bridge, then implement the
> atomic_get_input_bus_fmts/atomic_get_output_bus_fmts.
> 
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> ---
>  drivers/gpu/drm/meson/meson_dw_hdmi.c | 105 +++++++++++++++++++++-----
>  1 file changed, 85 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> index 3bb7ffe5fc39..4b3809626f7e 100644
> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> @@ -16,6 +16,7 @@
>  
>  #include <drm/bridge/dw_hdmi.h>
>  #include <drm/drm_atomic_helper.h>
> +#include <drm/drm_bridge.h>
>  #include <drm/drm_device.h>
>  #include <drm/drm_edid.h>
>  #include <drm/drm_probe_helper.h>
> @@ -135,6 +136,7 @@ struct meson_dw_hdmi_data {
>  
>  struct meson_dw_hdmi {
>  	struct drm_encoder encoder;
> +	struct drm_bridge bridge;
>  	struct dw_hdmi_plat_data dw_plat_data;
>  	struct meson_drm *priv;
>  	struct device *dev;
> @@ -151,6 +153,8 @@ struct meson_dw_hdmi {
>  };
>  #define encoder_to_meson_dw_hdmi(x) \
>  	container_of(x, struct meson_dw_hdmi, encoder)
> +#define bridge_to_meson_dw_hdmi(x) \
> +	container_of(x, struct meson_dw_hdmi, bridge)
>  
>  static inline int dw_hdmi_is_compatible(struct meson_dw_hdmi *dw_hdmi,
>  					const char *compat)
> @@ -368,7 +372,7 @@ static inline void meson_dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
>  }
>  
>  static void dw_hdmi_set_vclk(struct meson_dw_hdmi *dw_hdmi,
> -			     struct drm_display_mode *mode)
> +			     const struct drm_display_mode *mode)
>  {
>  	struct meson_drm *priv = dw_hdmi->priv;
>  	int vic = drm_match_cea_mode(mode);
> @@ -663,6 +667,10 @@ dw_hdmi_mode_valid(struct drm_connector *connector,
>  
>  /* Encoder */
>  
> +static const u32 meson_dw_hdmi_out_bus_fmts[] = {
> +	MEDIA_BUS_FMT_YUV8_1X24,
> +};
> +
>  static void meson_venc_hdmi_encoder_destroy(struct drm_encoder *encoder)
>  {
>  	drm_encoder_cleanup(encoder);
> @@ -672,16 +680,63 @@ static const struct drm_encoder_funcs meson_venc_hdmi_encoder_funcs = {
>  	.destroy        = meson_venc_hdmi_encoder_destroy,
>  };
>  
> -static int meson_venc_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
> +static u32 *
> +meson_venc_hdmi_encoder_get_out_bus_fmts(struct drm_bridge *bridge,
> +					 struct drm_bridge_state *bridge_state,
> +					 struct drm_crtc_state *crtc_state,
> +					 struct drm_connector_state *conn_state,
> +					 unsigned int *num_output_fmts)
> +{
> +	u32 *output_fmts;
> +
> +	*num_output_fmts = ARRAY_SIZE(meson_dw_hdmi_out_bus_fmts);
> +	output_fmts = kcalloc(*num_output_fmts, sizeof(*output_fmts),
> +			      GFP_KERNEL);
> +	if (!output_fmts)
> +		return NULL;
> +
> +	memcpy(output_fmts, meson_dw_hdmi_out_bus_fmts, *num_output_fmts);
> +
> +	return output_fmts;
> +}
> +
> +static u32 *
> +meson_venc_hdmi_encoder_get_inp_bus_fmts(struct drm_bridge *bridge,
> +					struct drm_bridge_state *bridge_state,
> +					struct drm_crtc_state *crtc_state,
> +					struct drm_connector_state *conn_state,
> +					u32 output_fmt,
> +					unsigned int *num_input_fmts)
> +{
> +	u32 *input_fmts = NULL;
> +
> +	if (output_fmt == meson_dw_hdmi_out_bus_fmts[0]) {
> +		*num_input_fmts = 1;
> +		input_fmts = kcalloc(*num_input_fmts,
> +				     sizeof(*input_fmts),
> +				     GFP_KERNEL);
> +		if (!input_fmts)
> +			return NULL;
> +
> +		input_fmts[0] = output_fmt;
> +	} else {
> +		*num_input_fmts = 0;
> +	}
> +
> +	return input_fmts;
> +}
> +
> +static int meson_venc_hdmi_encoder_atomic_check(struct drm_bridge *bridge,
> +					struct drm_bridge_state *bridge_state,
>  					struct drm_crtc_state *crtc_state,
>  					struct drm_connector_state *conn_state)
>  {
>  	return 0;
>  }
>  
> -static void meson_venc_hdmi_encoder_disable(struct drm_encoder *encoder)
> +static void meson_venc_hdmi_encoder_disable(struct drm_bridge *bridge)
>  {
> -	struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
> +	struct meson_dw_hdmi *dw_hdmi = bridge_to_meson_dw_hdmi(bridge);
>  	struct meson_drm *priv = dw_hdmi->priv;
>  
>  	DRM_DEBUG_DRIVER("\n");
> @@ -693,9 +748,9 @@ static void meson_venc_hdmi_encoder_disable(struct drm_encoder *encoder)
>  	writel_relaxed(0, priv->io_base + _REG(ENCP_VIDEO_EN));
>  }
>  
> -static void meson_venc_hdmi_encoder_enable(struct drm_encoder *encoder)
> +static void meson_venc_hdmi_encoder_enable(struct drm_bridge *bridge)
>  {
> -	struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
> +	struct meson_dw_hdmi *dw_hdmi = bridge_to_meson_dw_hdmi(bridge);
>  	struct meson_drm *priv = dw_hdmi->priv;
>  
>  	DRM_DEBUG_DRIVER("%s\n", priv->venc.hdmi_use_enci ? "VENCI" : "VENCP");
> @@ -706,11 +761,11 @@ static void meson_venc_hdmi_encoder_enable(struct drm_encoder *encoder)
>  		writel_relaxed(1, priv->io_base + _REG(ENCP_VIDEO_EN));
>  }
>  
> -static void meson_venc_hdmi_encoder_mode_set(struct drm_encoder *encoder,
> -				   struct drm_display_mode *mode,
> -				   struct drm_display_mode *adjusted_mode)
> +static void meson_venc_hdmi_encoder_mode_set(struct drm_bridge *bridge,
> +				   const struct drm_display_mode *mode,
> +				   const struct drm_display_mode *adjusted_mode)
>  {
> -	struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
> +	struct meson_dw_hdmi *dw_hdmi = bridge_to_meson_dw_hdmi(bridge);
>  	struct meson_drm *priv = dw_hdmi->priv;
>  	int vic = drm_match_cea_mode(mode);
>  
> @@ -726,12 +781,16 @@ static void meson_venc_hdmi_encoder_mode_set(struct drm_encoder *encoder,
>  	writel_relaxed(0, priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
>  }
>  
> -static const struct drm_encoder_helper_funcs
> -				meson_venc_hdmi_encoder_helper_funcs = {
> -	.atomic_check	= meson_venc_hdmi_encoder_atomic_check,
> -	.disable	= meson_venc_hdmi_encoder_disable,
> -	.enable		= meson_venc_hdmi_encoder_enable,
> -	.mode_set	= meson_venc_hdmi_encoder_mode_set,
> +static const struct drm_bridge_funcs meson_venc_hdmi_encoder_bridge_funcs = {
> +	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
> +	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
> +	.atomic_get_output_bus_fmts = meson_venc_hdmi_encoder_get_out_bus_fmts,

Hm, can this bridge element be connected directly to the HDMI connector
without the dw-hdmi bridge in the middle? If that's not the case, then
you probably don't have to implement ->atomic_get_output_bus_fmts()
(only used on the last bridge element).

> +	.atomic_get_input_bus_fmts = meson_venc_hdmi_encoder_get_inp_bus_fmts,
> +	.atomic_reset = drm_atomic_helper_bridge_reset,
> +	.atomic_check = meson_venc_hdmi_encoder_atomic_check,
> +	.enable	= meson_venc_hdmi_encoder_enable,
> +	.disable = meson_venc_hdmi_encoder_disable,
> +	.mode_set = meson_venc_hdmi_encoder_mode_set,
>  };
>  
>  /* DW HDMI Regmap */
> @@ -852,6 +911,7 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
>  	struct drm_device *drm = data;
>  	struct meson_drm *priv = drm->dev_private;
>  	struct dw_hdmi_plat_data *dw_plat_data;
> +	struct drm_bridge *next_bridge;
>  	struct drm_encoder *encoder;
>  	struct resource *res;
>  	int irq;
> @@ -953,8 +1013,6 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
>  
>  	/* Encoder */
>  
> -	drm_encoder_helper_add(encoder, &meson_venc_hdmi_encoder_helper_funcs);
> -
>  	ret = drm_encoder_init(drm, encoder, &meson_venc_hdmi_encoder_funcs,
>  			       DRM_MODE_ENCODER_TMDS, "meson_hdmi");
>  	if (ret) {
> @@ -962,6 +1020,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
>  		return ret;
>  	}
>  
> +	meson_dw_hdmi->bridge.funcs = &meson_venc_hdmi_encoder_bridge_funcs;
> +	drm_bridge_attach(encoder, &meson_dw_hdmi->bridge, NULL);
> +
>  	encoder->possible_crtcs = BIT(0);
>  
>  	DRM_DEBUG_DRIVER("encoder initialized\n");
> @@ -984,11 +1045,15 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
>  
>  	platform_set_drvdata(pdev, meson_dw_hdmi);
>  
> -	meson_dw_hdmi->hdmi = dw_hdmi_bind(pdev, encoder,
> -					   &meson_dw_hdmi->dw_plat_data);
> +	meson_dw_hdmi->hdmi = dw_hdmi_probe(pdev,
> +					    &meson_dw_hdmi->dw_plat_data);
>  	if (IS_ERR(meson_dw_hdmi->hdmi))
>  		return PTR_ERR(meson_dw_hdmi->hdmi);
>  
> +	next_bridge = of_drm_find_bridge(pdev->dev.of_node);
> +	if (next_bridge)
> +		drm_bridge_attach(encoder, next_bridge, &meson_dw_hdmi->bridge);
> +
>  	DRM_DEBUG_DRIVER("HDMI controller initialized\n");
>  
>  	return 0;
Neil Armstrong Feb. 7, 2020, 3:36 p.m. UTC | #2
On 07/02/2020 15:57, Boris Brezillon wrote:
> On Thu,  6 Feb 2020 20:18:30 +0100
> Neil Armstrong <narmstrong@baylibre.com> wrote:
> 
>> Switch the dw-hdmi driver to drm_bridge_funcs by implementing a new local
>> bridge, connecting it to the dw-hdmi bridge, then implement the
>> atomic_get_input_bus_fmts/atomic_get_output_bus_fmts.
>>
>> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
>> ---
>>  drivers/gpu/drm/meson/meson_dw_hdmi.c | 105 +++++++++++++++++++++-----
>>  1 file changed, 85 insertions(+), 20 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
>> index 3bb7ffe5fc39..4b3809626f7e 100644
>> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
>> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
>> @@ -16,6 +16,7 @@
>>  
>>  #include <drm/bridge/dw_hdmi.h>
>>  #include <drm/drm_atomic_helper.h>
>> +#include <drm/drm_bridge.h>
>>  #include <drm/drm_device.h>
>>  #include <drm/drm_edid.h>
>>  #include <drm/drm_probe_helper.h>
>> @@ -135,6 +136,7 @@ struct meson_dw_hdmi_data {
>>  
>>  struct meson_dw_hdmi {
>>  	struct drm_encoder encoder;
>> +	struct drm_bridge bridge;
>>  	struct dw_hdmi_plat_data dw_plat_data;
>>  	struct meson_drm *priv;
>>  	struct device *dev;
>> @@ -151,6 +153,8 @@ struct meson_dw_hdmi {
>>  };
>>  #define encoder_to_meson_dw_hdmi(x) \
>>  	container_of(x, struct meson_dw_hdmi, encoder)
>> +#define bridge_to_meson_dw_hdmi(x) \
>> +	container_of(x, struct meson_dw_hdmi, bridge)
>>  
>>  static inline int dw_hdmi_is_compatible(struct meson_dw_hdmi *dw_hdmi,
>>  					const char *compat)
>> @@ -368,7 +372,7 @@ static inline void meson_dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
>>  }
>>  
>>  static void dw_hdmi_set_vclk(struct meson_dw_hdmi *dw_hdmi,
>> -			     struct drm_display_mode *mode)
>> +			     const struct drm_display_mode *mode)
>>  {
>>  	struct meson_drm *priv = dw_hdmi->priv;
>>  	int vic = drm_match_cea_mode(mode);
>> @@ -663,6 +667,10 @@ dw_hdmi_mode_valid(struct drm_connector *connector,
>>  
>>  /* Encoder */
>>  
>> +static const u32 meson_dw_hdmi_out_bus_fmts[] = {
>> +	MEDIA_BUS_FMT_YUV8_1X24,
>> +};
>> +
>>  static void meson_venc_hdmi_encoder_destroy(struct drm_encoder *encoder)
>>  {
>>  	drm_encoder_cleanup(encoder);
>> @@ -672,16 +680,63 @@ static const struct drm_encoder_funcs meson_venc_hdmi_encoder_funcs = {
>>  	.destroy        = meson_venc_hdmi_encoder_destroy,
>>  };
>>  
>> -static int meson_venc_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
>> +static u32 *
>> +meson_venc_hdmi_encoder_get_out_bus_fmts(struct drm_bridge *bridge,
>> +					 struct drm_bridge_state *bridge_state,
>> +					 struct drm_crtc_state *crtc_state,
>> +					 struct drm_connector_state *conn_state,
>> +					 unsigned int *num_output_fmts)
>> +{
>> +	u32 *output_fmts;
>> +
>> +	*num_output_fmts = ARRAY_SIZE(meson_dw_hdmi_out_bus_fmts);
>> +	output_fmts = kcalloc(*num_output_fmts, sizeof(*output_fmts),
>> +			      GFP_KERNEL);
>> +	if (!output_fmts)
>> +		return NULL;
>> +
>> +	memcpy(output_fmts, meson_dw_hdmi_out_bus_fmts, *num_output_fmts);
>> +
>> +	return output_fmts;
>> +}
>> +
>> +static u32 *
>> +meson_venc_hdmi_encoder_get_inp_bus_fmts(struct drm_bridge *bridge,
>> +					struct drm_bridge_state *bridge_state,
>> +					struct drm_crtc_state *crtc_state,
>> +					struct drm_connector_state *conn_state,
>> +					u32 output_fmt,
>> +					unsigned int *num_input_fmts)
>> +{
>> +	u32 *input_fmts = NULL;
>> +
>> +	if (output_fmt == meson_dw_hdmi_out_bus_fmts[0]) {
>> +		*num_input_fmts = 1;
>> +		input_fmts = kcalloc(*num_input_fmts,
>> +				     sizeof(*input_fmts),
>> +				     GFP_KERNEL);
>> +		if (!input_fmts)
>> +			return NULL;
>> +
>> +		input_fmts[0] = output_fmt;
>> +	} else {
>> +		*num_input_fmts = 0;
>> +	}
>> +
>> +	return input_fmts;
>> +}
>> +
>> +static int meson_venc_hdmi_encoder_atomic_check(struct drm_bridge *bridge,
>> +					struct drm_bridge_state *bridge_state,
>>  					struct drm_crtc_state *crtc_state,
>>  					struct drm_connector_state *conn_state)
>>  {
>>  	return 0;
>>  }
>>  
>> -static void meson_venc_hdmi_encoder_disable(struct drm_encoder *encoder)
>> +static void meson_venc_hdmi_encoder_disable(struct drm_bridge *bridge)
>>  {
>> -	struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
>> +	struct meson_dw_hdmi *dw_hdmi = bridge_to_meson_dw_hdmi(bridge);
>>  	struct meson_drm *priv = dw_hdmi->priv;
>>  
>>  	DRM_DEBUG_DRIVER("\n");
>> @@ -693,9 +748,9 @@ static void meson_venc_hdmi_encoder_disable(struct drm_encoder *encoder)
>>  	writel_relaxed(0, priv->io_base + _REG(ENCP_VIDEO_EN));
>>  }
>>  
>> -static void meson_venc_hdmi_encoder_enable(struct drm_encoder *encoder)
>> +static void meson_venc_hdmi_encoder_enable(struct drm_bridge *bridge)
>>  {
>> -	struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
>> +	struct meson_dw_hdmi *dw_hdmi = bridge_to_meson_dw_hdmi(bridge);
>>  	struct meson_drm *priv = dw_hdmi->priv;
>>  
>>  	DRM_DEBUG_DRIVER("%s\n", priv->venc.hdmi_use_enci ? "VENCI" : "VENCP");
>> @@ -706,11 +761,11 @@ static void meson_venc_hdmi_encoder_enable(struct drm_encoder *encoder)
>>  		writel_relaxed(1, priv->io_base + _REG(ENCP_VIDEO_EN));
>>  }
>>  
>> -static void meson_venc_hdmi_encoder_mode_set(struct drm_encoder *encoder,
>> -				   struct drm_display_mode *mode,
>> -				   struct drm_display_mode *adjusted_mode)
>> +static void meson_venc_hdmi_encoder_mode_set(struct drm_bridge *bridge,
>> +				   const struct drm_display_mode *mode,
>> +				   const struct drm_display_mode *adjusted_mode)
>>  {
>> -	struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
>> +	struct meson_dw_hdmi *dw_hdmi = bridge_to_meson_dw_hdmi(bridge);
>>  	struct meson_drm *priv = dw_hdmi->priv;
>>  	int vic = drm_match_cea_mode(mode);
>>  
>> @@ -726,12 +781,16 @@ static void meson_venc_hdmi_encoder_mode_set(struct drm_encoder *encoder,
>>  	writel_relaxed(0, priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
>>  }
>>  
>> -static const struct drm_encoder_helper_funcs
>> -				meson_venc_hdmi_encoder_helper_funcs = {
>> -	.atomic_check	= meson_venc_hdmi_encoder_atomic_check,
>> -	.disable	= meson_venc_hdmi_encoder_disable,
>> -	.enable		= meson_venc_hdmi_encoder_enable,
>> -	.mode_set	= meson_venc_hdmi_encoder_mode_set,
>> +static const struct drm_bridge_funcs meson_venc_hdmi_encoder_bridge_funcs = {
>> +	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
>> +	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
>> +	.atomic_get_output_bus_fmts = meson_venc_hdmi_encoder_get_out_bus_fmts,
> 
> Hm, can this bridge element be connected directly to the HDMI connector
> without the dw-hdmi bridge in the middle? If that's not the case, then
> you probably don't have to implement ->atomic_get_output_bus_fmts()
> (only used on the last bridge element).

No, the HDMI bridge is mandatory here.

Ok, makes sense, I'll remove it then.

Neil

> 
>> +	.atomic_get_input_bus_fmts = meson_venc_hdmi_encoder_get_inp_bus_fmts,
>> +	.atomic_reset = drm_atomic_helper_bridge_reset,
>> +	.atomic_check = meson_venc_hdmi_encoder_atomic_check,
>> +	.enable	= meson_venc_hdmi_encoder_enable,
>> +	.disable = meson_venc_hdmi_encoder_disable,
>> +	.mode_set = meson_venc_hdmi_encoder_mode_set,
>>  };
>>  
>>  /* DW HDMI Regmap */
>> @@ -852,6 +911,7 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
>>  	struct drm_device *drm = data;
>>  	struct meson_drm *priv = drm->dev_private;
>>  	struct dw_hdmi_plat_data *dw_plat_data;
>> +	struct drm_bridge *next_bridge;
>>  	struct drm_encoder *encoder;
>>  	struct resource *res;
>>  	int irq;
>> @@ -953,8 +1013,6 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
>>  
>>  	/* Encoder */
>>  
>> -	drm_encoder_helper_add(encoder, &meson_venc_hdmi_encoder_helper_funcs);
>> -
>>  	ret = drm_encoder_init(drm, encoder, &meson_venc_hdmi_encoder_funcs,
>>  			       DRM_MODE_ENCODER_TMDS, "meson_hdmi");
>>  	if (ret) {
>> @@ -962,6 +1020,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
>>  		return ret;
>>  	}
>>  
>> +	meson_dw_hdmi->bridge.funcs = &meson_venc_hdmi_encoder_bridge_funcs;
>> +	drm_bridge_attach(encoder, &meson_dw_hdmi->bridge, NULL);
>> +
>>  	encoder->possible_crtcs = BIT(0);
>>  
>>  	DRM_DEBUG_DRIVER("encoder initialized\n");
>> @@ -984,11 +1045,15 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
>>  
>>  	platform_set_drvdata(pdev, meson_dw_hdmi);
>>  
>> -	meson_dw_hdmi->hdmi = dw_hdmi_bind(pdev, encoder,
>> -					   &meson_dw_hdmi->dw_plat_data);
>> +	meson_dw_hdmi->hdmi = dw_hdmi_probe(pdev,
>> +					    &meson_dw_hdmi->dw_plat_data);
>>  	if (IS_ERR(meson_dw_hdmi->hdmi))
>>  		return PTR_ERR(meson_dw_hdmi->hdmi);
>>  
>> +	next_bridge = of_drm_find_bridge(pdev->dev.of_node);
>> +	if (next_bridge)
>> +		drm_bridge_attach(encoder, next_bridge, &meson_dw_hdmi->bridge);
>> +
>>  	DRM_DEBUG_DRIVER("HDMI controller initialized\n");
>>  
>>  	return 0;
>

Patch
diff mbox series

diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index 3bb7ffe5fc39..4b3809626f7e 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -16,6 +16,7 @@ 
 
 #include <drm/bridge/dw_hdmi.h>
 #include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
 #include <drm/drm_device.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_probe_helper.h>
@@ -135,6 +136,7 @@  struct meson_dw_hdmi_data {
 
 struct meson_dw_hdmi {
 	struct drm_encoder encoder;
+	struct drm_bridge bridge;
 	struct dw_hdmi_plat_data dw_plat_data;
 	struct meson_drm *priv;
 	struct device *dev;
@@ -151,6 +153,8 @@  struct meson_dw_hdmi {
 };
 #define encoder_to_meson_dw_hdmi(x) \
 	container_of(x, struct meson_dw_hdmi, encoder)
+#define bridge_to_meson_dw_hdmi(x) \
+	container_of(x, struct meson_dw_hdmi, bridge)
 
 static inline int dw_hdmi_is_compatible(struct meson_dw_hdmi *dw_hdmi,
 					const char *compat)
@@ -368,7 +372,7 @@  static inline void meson_dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
 }
 
 static void dw_hdmi_set_vclk(struct meson_dw_hdmi *dw_hdmi,
-			     struct drm_display_mode *mode)
+			     const struct drm_display_mode *mode)
 {
 	struct meson_drm *priv = dw_hdmi->priv;
 	int vic = drm_match_cea_mode(mode);
@@ -663,6 +667,10 @@  dw_hdmi_mode_valid(struct drm_connector *connector,
 
 /* Encoder */
 
+static const u32 meson_dw_hdmi_out_bus_fmts[] = {
+	MEDIA_BUS_FMT_YUV8_1X24,
+};
+
 static void meson_venc_hdmi_encoder_destroy(struct drm_encoder *encoder)
 {
 	drm_encoder_cleanup(encoder);
@@ -672,16 +680,63 @@  static const struct drm_encoder_funcs meson_venc_hdmi_encoder_funcs = {
 	.destroy        = meson_venc_hdmi_encoder_destroy,
 };
 
-static int meson_venc_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
+static u32 *
+meson_venc_hdmi_encoder_get_out_bus_fmts(struct drm_bridge *bridge,
+					 struct drm_bridge_state *bridge_state,
+					 struct drm_crtc_state *crtc_state,
+					 struct drm_connector_state *conn_state,
+					 unsigned int *num_output_fmts)
+{
+	u32 *output_fmts;
+
+	*num_output_fmts = ARRAY_SIZE(meson_dw_hdmi_out_bus_fmts);
+	output_fmts = kcalloc(*num_output_fmts, sizeof(*output_fmts),
+			      GFP_KERNEL);
+	if (!output_fmts)
+		return NULL;
+
+	memcpy(output_fmts, meson_dw_hdmi_out_bus_fmts, *num_output_fmts);
+
+	return output_fmts;
+}
+
+static u32 *
+meson_venc_hdmi_encoder_get_inp_bus_fmts(struct drm_bridge *bridge,
+					struct drm_bridge_state *bridge_state,
+					struct drm_crtc_state *crtc_state,
+					struct drm_connector_state *conn_state,
+					u32 output_fmt,
+					unsigned int *num_input_fmts)
+{
+	u32 *input_fmts = NULL;
+
+	if (output_fmt == meson_dw_hdmi_out_bus_fmts[0]) {
+		*num_input_fmts = 1;
+		input_fmts = kcalloc(*num_input_fmts,
+				     sizeof(*input_fmts),
+				     GFP_KERNEL);
+		if (!input_fmts)
+			return NULL;
+
+		input_fmts[0] = output_fmt;
+	} else {
+		*num_input_fmts = 0;
+	}
+
+	return input_fmts;
+}
+
+static int meson_venc_hdmi_encoder_atomic_check(struct drm_bridge *bridge,
+					struct drm_bridge_state *bridge_state,
 					struct drm_crtc_state *crtc_state,
 					struct drm_connector_state *conn_state)
 {
 	return 0;
 }
 
-static void meson_venc_hdmi_encoder_disable(struct drm_encoder *encoder)
+static void meson_venc_hdmi_encoder_disable(struct drm_bridge *bridge)
 {
-	struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
+	struct meson_dw_hdmi *dw_hdmi = bridge_to_meson_dw_hdmi(bridge);
 	struct meson_drm *priv = dw_hdmi->priv;
 
 	DRM_DEBUG_DRIVER("\n");
@@ -693,9 +748,9 @@  static void meson_venc_hdmi_encoder_disable(struct drm_encoder *encoder)
 	writel_relaxed(0, priv->io_base + _REG(ENCP_VIDEO_EN));
 }
 
-static void meson_venc_hdmi_encoder_enable(struct drm_encoder *encoder)
+static void meson_venc_hdmi_encoder_enable(struct drm_bridge *bridge)
 {
-	struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
+	struct meson_dw_hdmi *dw_hdmi = bridge_to_meson_dw_hdmi(bridge);
 	struct meson_drm *priv = dw_hdmi->priv;
 
 	DRM_DEBUG_DRIVER("%s\n", priv->venc.hdmi_use_enci ? "VENCI" : "VENCP");
@@ -706,11 +761,11 @@  static void meson_venc_hdmi_encoder_enable(struct drm_encoder *encoder)
 		writel_relaxed(1, priv->io_base + _REG(ENCP_VIDEO_EN));
 }
 
-static void meson_venc_hdmi_encoder_mode_set(struct drm_encoder *encoder,
-				   struct drm_display_mode *mode,
-				   struct drm_display_mode *adjusted_mode)
+static void meson_venc_hdmi_encoder_mode_set(struct drm_bridge *bridge,
+				   const struct drm_display_mode *mode,
+				   const struct drm_display_mode *adjusted_mode)
 {
-	struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
+	struct meson_dw_hdmi *dw_hdmi = bridge_to_meson_dw_hdmi(bridge);
 	struct meson_drm *priv = dw_hdmi->priv;
 	int vic = drm_match_cea_mode(mode);
 
@@ -726,12 +781,16 @@  static void meson_venc_hdmi_encoder_mode_set(struct drm_encoder *encoder,
 	writel_relaxed(0, priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
 }
 
-static const struct drm_encoder_helper_funcs
-				meson_venc_hdmi_encoder_helper_funcs = {
-	.atomic_check	= meson_venc_hdmi_encoder_atomic_check,
-	.disable	= meson_venc_hdmi_encoder_disable,
-	.enable		= meson_venc_hdmi_encoder_enable,
-	.mode_set	= meson_venc_hdmi_encoder_mode_set,
+static const struct drm_bridge_funcs meson_venc_hdmi_encoder_bridge_funcs = {
+	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+	.atomic_get_output_bus_fmts = meson_venc_hdmi_encoder_get_out_bus_fmts,
+	.atomic_get_input_bus_fmts = meson_venc_hdmi_encoder_get_inp_bus_fmts,
+	.atomic_reset = drm_atomic_helper_bridge_reset,
+	.atomic_check = meson_venc_hdmi_encoder_atomic_check,
+	.enable	= meson_venc_hdmi_encoder_enable,
+	.disable = meson_venc_hdmi_encoder_disable,
+	.mode_set = meson_venc_hdmi_encoder_mode_set,
 };
 
 /* DW HDMI Regmap */
@@ -852,6 +911,7 @@  static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 	struct drm_device *drm = data;
 	struct meson_drm *priv = drm->dev_private;
 	struct dw_hdmi_plat_data *dw_plat_data;
+	struct drm_bridge *next_bridge;
 	struct drm_encoder *encoder;
 	struct resource *res;
 	int irq;
@@ -953,8 +1013,6 @@  static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 
 	/* Encoder */
 
-	drm_encoder_helper_add(encoder, &meson_venc_hdmi_encoder_helper_funcs);
-
 	ret = drm_encoder_init(drm, encoder, &meson_venc_hdmi_encoder_funcs,
 			       DRM_MODE_ENCODER_TMDS, "meson_hdmi");
 	if (ret) {
@@ -962,6 +1020,9 @@  static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 		return ret;
 	}
 
+	meson_dw_hdmi->bridge.funcs = &meson_venc_hdmi_encoder_bridge_funcs;
+	drm_bridge_attach(encoder, &meson_dw_hdmi->bridge, NULL);
+
 	encoder->possible_crtcs = BIT(0);
 
 	DRM_DEBUG_DRIVER("encoder initialized\n");
@@ -984,11 +1045,15 @@  static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 
 	platform_set_drvdata(pdev, meson_dw_hdmi);
 
-	meson_dw_hdmi->hdmi = dw_hdmi_bind(pdev, encoder,
-					   &meson_dw_hdmi->dw_plat_data);
+	meson_dw_hdmi->hdmi = dw_hdmi_probe(pdev,
+					    &meson_dw_hdmi->dw_plat_data);
 	if (IS_ERR(meson_dw_hdmi->hdmi))
 		return PTR_ERR(meson_dw_hdmi->hdmi);
 
+	next_bridge = of_drm_find_bridge(pdev->dev.of_node);
+	if (next_bridge)
+		drm_bridge_attach(encoder, next_bridge, &meson_dw_hdmi->bridge);
+
 	DRM_DEBUG_DRIVER("HDMI controller initialized\n");
 
 	return 0;