Re: [PATCH v12 27/28] drm/rockchip: inno_hdmi: Switch to HDMI connector

From: Andy Yan <andy.yan@rock-chips.com>
To: "Maxime Ripard" <mripard@kernel.org>,
	"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
	"Thomas Zimmermann" <tzimmermann@suse.de>,
	"David Airlie" <airlied@gmail.com>,
	"Daniel Vetter" <daniel@ffwll.ch>,
	"Jonathan Corbet" <corbet@lwn.net>,
	"Sandy Huang" <hjc@rock-chips.com>,
	"Heiko Stübner" <heiko@sntech.de>, "Chen-Yu Tsai" <wens@csie.org>,
	"Jernej Skrabec" <jernej.skrabec@gmail.com>,
	"Samuel Holland" <samuel@sholland.org>
Cc: "Hans Verkuil" <hverkuil@xs4all.nl>,
	"Sebastian Wick" <sebastian.wick@redhat.com>,
	"Ville Syrjälä" <ville.syrjala@linux.intel.com>,
	dri-devel@lists.freedesktop.org,
	linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
	linux-rockchip@lists.infradead.org, linux-sunxi@lists.linux.dev
Subject: Re: [PATCH v12 27/28] drm/rockchip: inno_hdmi: Switch to HDMI connector
Date: Sat, 27 Apr 2024 18:44:54 +0800	[thread overview]
Message-ID: <68eba0ec-bf9c-4d76-a362-5304a4cb61d5@rock-chips.com> (raw)
In-Reply-To: <20240423-kms-hdmi-connector-state-v12-27-3338e4c0b189@kernel.org>

Hi Maxime,

On 4/23/24 18:45, Maxime Ripard wrote:
> The new HDMI connector infrastructure allows to remove some boilerplate,
> especially to generate infoframes. Let's switch to it.
> 
> Reviewed-by: Heiko Stuebner <heiko@sntech.de>
> Acked-by: Heiko Stuebner <heiko@sntech.de>
> Signed-off-by: Maxime Ripard <mripard@kernel.org>
> ---
>   drivers/gpu/drm/rockchip/Kconfig     |   1 +
>   drivers/gpu/drm/rockchip/inno_hdmi.c | 143 +++++++++++++----------------------
>   2 files changed, 53 insertions(+), 91 deletions(-)
> 
> diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig
> index 4c7072e6e34e..e2ec20c2e2eb 100644
> --- a/drivers/gpu/drm/rockchip/Kconfig
> +++ b/drivers/gpu/drm/rockchip/Kconfig
> @@ -72,10 +72,11 @@ config ROCKCHIP_DW_MIPI_DSI
>   	  enable MIPI DSI on RK3288 or RK3399 based SoC, you should
>   	  select this option.
>   
>   config ROCKCHIP_INNO_HDMI
>   	bool "Rockchip specific extensions for Innosilicon HDMI"
> +	depends on DRM_HDMI_STATE_HELPER
>   	help
>   	  This selects support for Rockchip SoC specific extensions
>   	  for the Innosilicon HDMI driver. If you want to enable
>   	  HDMI on RK3036 based SoC, you should select this option.
>   
> diff --git a/drivers/gpu/drm/rockchip/inno_hdmi.c b/drivers/gpu/drm/rockchip/inno_hdmi.c
> index 1d2261643743..3756259bfb10 100644
> --- a/drivers/gpu/drm/rockchip/inno_hdmi.c
> +++ b/drivers/gpu/drm/rockchip/inno_hdmi.c
> @@ -65,13 +65,11 @@ struct inno_hdmi {
>   	const struct inno_hdmi_variant *variant;
>   };
>   

I think we should include <drm/display/drm_hdmi_state_helper.h>, or the compile will complain about:
implicit decalaration of funciont drm_atomic_helper_connector_hdmi_update_infoframes

>   struct inno_hdmi_connector_state {
>   	struct drm_connector_state	base;
> -	unsigned int			enc_out_format;
>   	unsigned int			colorimetry;
> -	bool				rgb_limited_range;
>   };
>   
>   static struct inno_hdmi *encoder_to_inno_hdmi(struct drm_encoder *encoder)
>   {
>   	struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder);
> @@ -255,90 +253,53 @@ static void inno_hdmi_reset(struct inno_hdmi *hdmi)
>   	hdmi_modb(hdmi, HDMI_SYS_CTRL, msk, val);
>   
>   	inno_hdmi_standby(hdmi);
>   }
>   
> -static void inno_hdmi_disable_frame(struct inno_hdmi *hdmi,
> -				    enum hdmi_infoframe_type type)
> +static int inno_hdmi_disable_frame(struct drm_connector *connector,
> +				   enum hdmi_infoframe_type type)
>   {
> -	struct drm_connector *connector = &hdmi->connector;
> -
> -	if (type != HDMI_INFOFRAME_TYPE_AVI) {
> -		drm_err(connector->dev,
> -			"Unsupported infoframe type: %u\n", type);
> -		return;
> -	}
> -
> -	hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_BUF_INDEX, INFOFRAME_AVI);
> -}
> -
> -static int inno_hdmi_upload_frame(struct inno_hdmi *hdmi,
> -				  union hdmi_infoframe *frame, enum hdmi_infoframe_type type)
> -{
> -	struct drm_connector *connector = &hdmi->connector;
> -	u8 packed_frame[HDMI_MAXIMUM_INFO_FRAME_SIZE];
> -	ssize_t rc, i;
> +	struct inno_hdmi *hdmi = connector_to_inno_hdmi(connector);
>   
>   	if (type != HDMI_INFOFRAME_TYPE_AVI) {
>   		drm_err(connector->dev,
>   			"Unsupported infoframe type: %u\n", type);
>   		return 0;
>   	}
>   
> -	inno_hdmi_disable_frame(hdmi, type);
> +	hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_BUF_INDEX, INFOFRAME_AVI);
>   
> -	rc = hdmi_infoframe_pack(frame, packed_frame,
> -				 sizeof(packed_frame));
> -	if (rc < 0)
> -		return rc;
> +	return 0;
> +}
>   
> -	for (i = 0; i < rc; i++)
> +static int inno_hdmi_upload_frame(struct drm_connector *connector,
> +				  enum hdmi_infoframe_type type,
> +				  const u8 *buffer, size_t len)
> +{
> +	struct inno_hdmi *hdmi = connector_to_inno_hdmi(connector);
> +	u8 packed_frame[HDMI_MAXIMUM_INFO_FRAME_SIZE];
> +	ssize_t i;
> +
> +	if (type != HDMI_INFOFRAME_TYPE_AVI) {
> +		drm_err(connector->dev,
> +			"Unsupported infoframe type: %u\n", type);
> +		return 0;
> +	}
> +
> +	inno_hdmi_disable_frame(connector, type);
> +
> +	for (i = 0; i < len; i++)
>   		hdmi_writeb(hdmi, HDMI_CONTROL_PACKET_ADDR + i,
>   			    packed_frame[i]);
>   
>   	return 0;
>   }
>   
> -static int inno_hdmi_config_video_avi(struct inno_hdmi *hdmi,
> -				      struct drm_display_mode *mode)
> -{
> -	struct drm_connector *connector = &hdmi->connector;
> -	struct drm_connector_state *conn_state = connector->state;
> -	struct inno_hdmi_connector_state *inno_conn_state =
> -					to_inno_hdmi_conn_state(conn_state);
> -	union hdmi_infoframe frame;
> -	int rc;
> -
> -	rc = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
> -						      &hdmi->connector,
> -						      mode);
> -	if (rc) {
> -		inno_hdmi_disable_frame(hdmi, HDMI_INFOFRAME_TYPE_AVI);
> -		return rc;
> -	}
> -
> -	if (inno_conn_state->enc_out_format == HDMI_COLORSPACE_YUV444)
> -		frame.avi.colorspace = HDMI_COLORSPACE_YUV444;
> -	else if (inno_conn_state->enc_out_format == HDMI_COLORSPACE_YUV422)
> -		frame.avi.colorspace = HDMI_COLORSPACE_YUV422;
> -	else
> -		frame.avi.colorspace = HDMI_COLORSPACE_RGB;
> -
> -	if (inno_conn_state->enc_out_format == HDMI_COLORSPACE_RGB) {
> -		drm_hdmi_avi_infoframe_quant_range(&frame.avi,
> -						   connector, mode,
> -						   inno_conn_state->rgb_limited_range ?
> -						   HDMI_QUANTIZATION_RANGE_LIMITED :
> -						   HDMI_QUANTIZATION_RANGE_FULL);
> -	} else {
> -		frame.avi.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT;
> -		frame.avi.ycc_quantization_range =
> -			HDMI_YCC_QUANTIZATION_RANGE_LIMITED;
> -	}
> -
> -	return inno_hdmi_upload_frame(hdmi, &frame, HDMI_INFOFRAME_TYPE_AVI);
> -}
> +static const struct drm_connector_hdmi_funcs inno_hdmi_hdmi_connector_funcs = {
> +	.clear_infoframe	= inno_hdmi_disable_frame,
> +	.write_infoframe	= inno_hdmi_upload_frame,
> +};
>   
>   static int inno_hdmi_config_video_csc(struct inno_hdmi *hdmi)
>   {
>   	struct drm_connector *connector = &hdmi->connector;
>   	struct drm_connector_state *conn_state = connector->state;
> @@ -359,12 +320,12 @@ static int inno_hdmi_config_video_csc(struct inno_hdmi *hdmi)
>   	value = v_VIDEO_INPUT_BITS(VIDEO_INPUT_8BITS) |
>   		v_VIDEO_OUTPUT_COLOR(0) |
>   		v_VIDEO_INPUT_CSP(0);
>   	hdmi_writeb(hdmi, HDMI_VIDEO_CONTRL2, value);
>   
> -	if (inno_conn_state->enc_out_format == HDMI_COLORSPACE_RGB) {
> -		if (inno_conn_state->rgb_limited_range) {
> +	if (conn_state->hdmi.output_format == HDMI_COLORSPACE_RGB) {
> +		if (conn_state->hdmi.is_limited_range) {
>   			csc_mode = CSC_RGB_0_255_TO_RGB_16_235_8BIT;
>   			auto_csc = AUTO_CSC_DISABLE;
>   			c0_c2_change = C0_C2_CHANGE_DISABLE;
>   			csc_enable = v_CSC_ENABLE;
>   
> @@ -378,18 +339,18 @@ static int inno_hdmi_config_video_csc(struct inno_hdmi *hdmi)
>   				  v_VIDEO_C0_C2_SWAP(C0_C2_CHANGE_DISABLE));
>   			return 0;
>   		}
>   	} else {
>   		if (inno_conn_state->colorimetry == HDMI_COLORIMETRY_ITU_601) {
> -			if (inno_conn_state->enc_out_format == HDMI_COLORSPACE_YUV444) {
> +			if (conn_state->hdmi.output_format == HDMI_COLORSPACE_YUV444) {
>   				csc_mode = CSC_RGB_0_255_TO_ITU601_16_235_8BIT;
>   				auto_csc = AUTO_CSC_DISABLE;
>   				c0_c2_change = C0_C2_CHANGE_DISABLE;
>   				csc_enable = v_CSC_ENABLE;
>   			}
>   		} else {
> -			if (inno_conn_state->enc_out_format == HDMI_COLORSPACE_YUV444) {
> +			if (conn_state->hdmi.output_format == HDMI_COLORSPACE_YUV444) {
>   				csc_mode = CSC_RGB_0_255_TO_ITU709_16_235_8BIT;
>   				auto_csc = AUTO_CSC_DISABLE;
>   				c0_c2_change = C0_C2_CHANGE_DISABLE;
>   				csc_enable = v_CSC_ENABLE;
>   			}
> @@ -460,14 +421,16 @@ static int inno_hdmi_config_video_timing(struct inno_hdmi *hdmi,
>   
>   	return 0;
>   }
>   
>   static int inno_hdmi_setup(struct inno_hdmi *hdmi,
> -			   struct drm_display_mode *mode)
> +			   struct drm_crtc_state *new_crtc_state,
> +			   struct drm_connector_state *new_conn_state)
>   {
> -	struct drm_display_info *display = &hdmi->connector.display_info;
> -	unsigned long mpixelclock = mode->clock * 1000;
> +	struct drm_connector *connector = &hdmi->connector;
> +	struct drm_display_info *display = &connector->display_info;
> +	struct drm_display_mode *mode = &new_crtc_state->adjusted_mode;
>   
>   	/* Mute video and audio output */
>   	hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK,
>   		  v_AUDIO_MUTE(1) | v_VIDEO_MUTE(1));
>   
> @@ -477,26 +440,26 @@ static int inno_hdmi_setup(struct inno_hdmi *hdmi,
>   
>   	inno_hdmi_config_video_timing(hdmi, mode);
>   
>   	inno_hdmi_config_video_csc(hdmi);
>   
> -	if (display->is_hdmi)
> -		inno_hdmi_config_video_avi(hdmi, mode);
> +	drm_atomic_helper_connector_hdmi_update_infoframes(connector,
> +							   new_conn_state->state);
>   
>   	/*
>   	 * When IP controller have configured to an accurate video
>   	 * timing, then the TMDS clock source would be switched to
>   	 * DCLK_LCDC, so we need to init the TMDS rate to mode pixel
>   	 * clock rate, and reconfigure the DDC clock.
>   	 */
> -	inno_hdmi_i2c_init(hdmi, mpixelclock);
> +	inno_hdmi_i2c_init(hdmi, new_conn_state->hdmi.tmds_char_rate);
>   
>   	/* Unmute video and audio output */
>   	hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK,
>   		  v_AUDIO_MUTE(0) | v_VIDEO_MUTE(0));
>   
> -	inno_hdmi_power_up(hdmi, mpixelclock);
> +	inno_hdmi_power_up(hdmi, new_conn_state->hdmi.tmds_char_rate);
>   
>   	return 0;
>   }
>   
>   static enum drm_mode_status inno_hdmi_display_mode_valid(struct inno_hdmi *hdmi,
> @@ -544,11 +507,11 @@ static void inno_hdmi_encoder_enable(struct drm_encoder *encoder,
>   
>   	crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
>   	if (WARN_ON(!crtc_state))
>   		return;
>   
> -	inno_hdmi_setup(hdmi, &crtc_state->adjusted_mode);
> +	inno_hdmi_setup(hdmi, crtc_state, conn_state);
>   }
>   
>   static void inno_hdmi_encoder_disable(struct drm_encoder *encoder,
>   				      struct drm_atomic_state *state)
>   {
> @@ -561,11 +524,10 @@ static int
>   inno_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
>   			       struct drm_crtc_state *crtc_state,
>   			       struct drm_connector_state *conn_state)
>   {
>   	struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
> -	struct inno_hdmi *hdmi = encoder_to_inno_hdmi(encoder);
>   	struct drm_display_mode *mode = &crtc_state->adjusted_mode;
>   	u8 vic = drm_match_cea_mode(mode);
>   	struct inno_hdmi_connector_state *inno_conn_state =
>   					to_inno_hdmi_conn_state(conn_state);
>   
> @@ -578,16 +540,11 @@ inno_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
>   	    vic == 17 || vic == 18)
>   		inno_conn_state->colorimetry = HDMI_COLORIMETRY_ITU_601;
>   	else
>   		inno_conn_state->colorimetry = HDMI_COLORIMETRY_ITU_709;
>   
> -	inno_conn_state->enc_out_format = HDMI_COLORSPACE_RGB;
> -	inno_conn_state->rgb_limited_range =
> -		drm_default_rgb_quant_range(mode) == HDMI_QUANTIZATION_RANGE_LIMITED;
> -
> -	return  inno_hdmi_display_mode_valid(hdmi,
> -				&crtc_state->adjusted_mode) == MODE_OK ? 0 : -EINVAL;
> +	return 0;
>   }
>   
>   static struct drm_encoder_helper_funcs inno_hdmi_encoder_helper_funcs = {
>   	.atomic_check	= inno_hdmi_encoder_atomic_check,
>   	.atomic_enable	= inno_hdmi_encoder_enable,
> @@ -660,14 +617,13 @@ static void inno_hdmi_connector_reset(struct drm_connector *connector)
>   	inno_conn_state = kzalloc(sizeof(*inno_conn_state), GFP_KERNEL);
>   	if (!inno_conn_state)
>   		return;
>   
>   	__drm_atomic_helper_connector_reset(connector, &inno_conn_state->base);
> +	__drm_atomic_helper_connector_hdmi_reset(connector, connector->state);
>   
>   	inno_conn_state->colorimetry = HDMI_COLORIMETRY_ITU_709;
> -	inno_conn_state->enc_out_format = HDMI_COLORSPACE_RGB;
> -	inno_conn_state->rgb_limited_range = false;
>   }
>   
>   static struct drm_connector_state *
>   inno_hdmi_connector_duplicate_state(struct drm_connector *connector)
>   {
> @@ -696,10 +652,11 @@ static const struct drm_connector_funcs inno_hdmi_connector_funcs = {
>   	.atomic_duplicate_state = inno_hdmi_connector_duplicate_state,
>   	.atomic_destroy_state = inno_hdmi_connector_destroy_state,
>   };
>   
>   static struct drm_connector_helper_funcs inno_hdmi_connector_helper_funcs = {
> +	.atomic_check = drm_atomic_helper_connector_hdmi_check,
>   	.get_modes = inno_hdmi_connector_get_modes,
>   	.mode_valid = inno_hdmi_connector_mode_valid,
>   };
>   
>   static int inno_hdmi_register(struct drm_device *drm, struct inno_hdmi *hdmi)
> @@ -723,14 +680,18 @@ static int inno_hdmi_register(struct drm_device *drm, struct inno_hdmi *hdmi)
>   
>   	hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD;
>   
>   	drm_connector_helper_add(&hdmi->connector,
>   				 &inno_hdmi_connector_helper_funcs);
> -	drm_connector_init_with_ddc(drm, &hdmi->connector,
> -				    &inno_hdmi_connector_funcs,
> -				    DRM_MODE_CONNECTOR_HDMIA,
> -				    hdmi->ddc);
> +	drmm_connector_hdmi_init(drm, &hdmi->connector,
> +				 "Rockchip", "Inno HDMI",
> +				 &inno_hdmi_connector_funcs,
> +				 &inno_hdmi_hdmi_connector_funcs,
> +				 DRM_MODE_CONNECTOR_HDMIA,
> +				 hdmi->ddc,
> +				 BIT(HDMI_COLORSPACE_RGB),
> +				 8);
     This function call will failed as inno_hdmi_connector_funcs has a destory callback.
     drmm_connector_init have the check:
     if (drm_WARN_ON(dev, funcs && funcs->destory))
         return -EINVAL.

I think the patch for sun4i has the same issue.

>   
>   	drm_connector_attach_encoder(&hdmi->connector, encoder);
>   
>   	return 0;
>   }
> 

And after this whole series applied on linux 6.9-rc4, the display on rk3036 kylin is lost, I get
the following error:
[  178.999421] rockchip-drm display-subsystem: [drm:drm_atomic_check_only] checking 87b7fbde
[  178.999471] rockchip-drm display-subsystem: [drm:drm_atomic_helper_check_modeset] [CRTC:35:crtc-0] mode changed
[  178.999498] rockchip-drm display-subsystem: [drm:drm_atomic_helper_check_modeset] [CRTC:35:crtc-0] enable changed
[  178.999521] rockchip-drm display-subsystem: [drm:drm_atomic_helper_check_modeset] [CRTC:35:crtc-0] active changed
[  178.999547] rockchip-drm display-subsystem: [drm:drm_atomic_helper_check_modeset] Updating routing for [CONNECTOR:37:HDMI-A-1]
[  178.999575] rockchip-drm display-subsystem: [drm:drm_atomic_helper_check_modeset] [CONNECTOR:37:HDMI-A-1] using [ENCODER:36:TMDS-36] on [CRTC:35:crtc-0]
[  178.999604] rockchip-drm display-subsystem: [drm:drm_atomic_helper_connector_hdmi_check] Trying with a 8 bpc output
[  178.999636] rockchip-drm display-subsystem: [drm:drm_atomic_helper_connector_hdmi_check] Trying RGB output format
[  178.999730] rockchip-drm display-subsystem: [drm:drm_atomic_helper_connector_hdmi_check] RGB Format, checking the constraints.
[  178.999757] rockchip-drm display-subsystem: [drm:drm_atomic_helper_connector_hdmi_check] RGB output format not supported with 8 bpc
[  178.999783] rockchip-drm display-subsystem: [drm:drm_atomic_helper_connector_hdmi_check] Failed. No Format Supported for that bpc count.
[  178.999810] rockchip-drm display-subsystem: [drm:drm_atomic_helper_check_modeset] [CONNECTOR:37:HDMI-A-1] driver check failed
[  178.999836] rockchip-drm display-subsystem: [drm:drm_atomic_check_only] atomic driver check for 87b7fbde failed: -22
[  178.999868] rockchip-drm display-subsystem: [drm:drm_atomic_state_default_clear] Clearing atomic state 87b7fbde
[  178.999898] [drm:drm_mode_object_put] OBJ ID: 37 (4)
[  178.999922] [drm:drm_mode_object_put] OBJ ID: 37 (3)
[  178.999944] [drm:drm_mode_object_put] OBJ ID: 40 (1)
[  178.999971] [drm:drm_mode_object_put] OBJ ID: 39 (2)

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