Re:[PATCH v14 28/28] drm/sun4i: hdmi: Switch to HDMI connector

["Andy Yan" <andyshrk@163.com>]

Hi Maxime,

At 2024-05-21 18:14:01, "Maxime Ripard" <mripard@kernel.org> wrote:
>The new HDMI connector infrastructure allows to remove some boilerplate,
>especially to generate infoframes. Let's switch to it.
>
>Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
>Acked-by: Sui Jingfeng <sui.jingfeng@linux.dev>
>Signed-off-by: Maxime Ripard <mripard@kernel.org>

Reviewed-by: Andy Yan <andyshrk@163.com>
>---
> drivers/gpu/drm/sun4i/Kconfig          |  3 ++
> drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c | 81 +++++++++++++++++++++-------------
> 2 files changed, 54 insertions(+), 30 deletions(-)
>
>diff --git a/drivers/gpu/drm/sun4i/Kconfig b/drivers/gpu/drm/sun4i/Kconfig
>index 4741d9f6544c..4037e085430e 100644
>--- a/drivers/gpu/drm/sun4i/Kconfig
>+++ b/drivers/gpu/drm/sun4i/Kconfig
>@@ -16,10 +16,13 @@ config DRM_SUN4I
> if DRM_SUN4I
> 
> config DRM_SUN4I_HDMI
> 	tristate "Allwinner A10/A10s/A20/A31 HDMI Controller Support"
> 	depends on ARM || COMPILE_TEST
>+	select DRM_DISPLAY_HDMI_HELPER
>+	select DRM_DISPLAY_HDMI_STATE_HELPER
>+	select DRM_DISPLAY_HELPER
> 	default DRM_SUN4I
> 	help
> 	  Choose this option if you have an Allwinner A10/A10s/A20/A31
> 	  SoC with an HDMI controller.
> 
>diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
>index 1c6cda2bfb14..0e652dd480c9 100644
>--- a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
>+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
>@@ -38,34 +38,28 @@
> 	container_of_const(e, struct sun4i_hdmi, encoder)
> 
> #define drm_connector_to_sun4i_hdmi(c)		\
> 	container_of_const(c, struct sun4i_hdmi, connector)
> 
>-static int sun4i_hdmi_setup_avi_infoframes(struct sun4i_hdmi *hdmi,
>-					   struct drm_display_mode *mode)
>+static int sun4i_hdmi_write_infoframe(struct drm_connector *connector,
>+				      enum hdmi_infoframe_type type,
>+				      const u8 *buffer, size_t len)
> {
>-	struct hdmi_avi_infoframe frame;
>-	u8 buffer[17];
>-	int i, ret;
>+	struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);
>+	int i;
> 
>-	ret = drm_hdmi_avi_infoframe_from_display_mode(&frame,
>-						       &hdmi->connector, mode);
>-	if (ret < 0) {
>-		DRM_ERROR("Failed to get infoframes from mode\n");
>-		return ret;
>+	if (type != HDMI_INFOFRAME_TYPE_AVI) {
>+		drm_err(connector->dev,
>+			"Unsupported infoframe type: %u\n", type);
>+		return 0;
> 	}
> 
>-	ret = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer));
>-	if (ret < 0) {
>-		DRM_ERROR("Failed to pack infoframes\n");
>-		return ret;
>-	}
>-
>-	for (i = 0; i < sizeof(buffer); i++)
>+	for (i = 0; i < len; i++)
> 		writeb(buffer[i], hdmi->base + SUN4I_HDMI_AVI_INFOFRAME_REG(i));
> 
> 	return 0;
>+
> }
> 
> static void sun4i_hdmi_disable(struct drm_encoder *encoder,
> 			       struct drm_atomic_state *state)
> {
>@@ -84,18 +78,22 @@ static void sun4i_hdmi_disable(struct drm_encoder *encoder,
> static void sun4i_hdmi_enable(struct drm_encoder *encoder,
> 			      struct drm_atomic_state *state)
> {
> 	struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
> 	struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
>-	struct drm_display_info *display = &hdmi->connector.display_info;
>+	struct drm_connector *connector = &hdmi->connector;
>+	struct drm_display_info *display = &connector->display_info;
>+	struct drm_connector_state *conn_state =
>+		drm_atomic_get_new_connector_state(state, connector);
>+	unsigned long long tmds_rate = conn_state->hdmi.tmds_char_rate;
> 	unsigned int x, y;
> 	u32 val = 0;
> 
> 	DRM_DEBUG_DRIVER("Enabling the HDMI Output\n");
> 
>-	clk_set_rate(hdmi->mod_clk, mode->crtc_clock * 1000);
>-	clk_set_rate(hdmi->tmds_clk, mode->crtc_clock * 1000);
>+	clk_set_rate(hdmi->mod_clk, tmds_rate);
>+	clk_set_rate(hdmi->tmds_clk, tmds_rate);
> 
> 	/* Set input sync enable */
> 	writel(SUN4I_HDMI_UNKNOWN_INPUT_SYNC,
> 	       hdmi->base + SUN4I_HDMI_UNKNOWN_REG);
> 
>@@ -144,11 +142,12 @@ static void sun4i_hdmi_enable(struct drm_encoder *encoder,
> 
> 	writel(val, hdmi->base + SUN4I_HDMI_VID_TIMING_POL_REG);
> 
> 	clk_prepare_enable(hdmi->tmds_clk);
> 
>-	sun4i_hdmi_setup_avi_infoframes(hdmi, mode);
>+	drm_atomic_helper_connector_hdmi_update_infoframes(connector, state);
>+
> 	val |= SUN4I_HDMI_PKT_CTRL_TYPE(0, SUN4I_HDMI_PKT_AVI);
> 	val |= SUN4I_HDMI_PKT_CTRL_TYPE(1, SUN4I_HDMI_PKT_END);
> 	writel(val, hdmi->base + SUN4I_HDMI_PKT_CTRL_REG(0));
> 
> 	val = SUN4I_HDMI_VID_CTRL_ENABLE;
>@@ -197,23 +196,26 @@ static int sun4i_hdmi_connector_atomic_check(struct drm_connector *connector,
> 	struct drm_crtc_state *crtc_state = crtc->state;
> 	struct drm_display_mode *mode = &crtc_state->adjusted_mode;
> 	enum drm_mode_status status;
> 
> 	status = sun4i_hdmi_connector_clock_valid(connector, mode,
>-						  mode->clock * 1000);
>+						  conn_state->hdmi.tmds_char_rate);
> 	if (status != MODE_OK)
> 		return -EINVAL;
> 
> 	return 0;
> }
> 
> static enum drm_mode_status
> sun4i_hdmi_connector_mode_valid(struct drm_connector *connector,
> 				struct drm_display_mode *mode)
> {
>-	return sun4i_hdmi_connector_clock_valid(connector, mode,
>-						mode->clock * 1000);
>+	unsigned long long rate =
>+		drm_connector_hdmi_compute_mode_clock(mode, 8,
>+						      HDMI_COLORSPACE_RGB);
>+
>+	return sun4i_hdmi_connector_clock_valid(connector, mode, rate);
> }
> 
> static int sun4i_hdmi_get_modes(struct drm_connector *connector)
> {
> 	struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);
>@@ -259,10 +261,15 @@ static struct i2c_adapter *sun4i_hdmi_get_ddc(struct device *dev)
> 		return ERR_PTR(-EPROBE_DEFER);
> 
> 	return ddc;
> }
> 
>+static const struct drm_connector_hdmi_funcs sun4i_hdmi_hdmi_connector_funcs = {
>+	.tmds_char_rate_valid	= sun4i_hdmi_connector_clock_valid,
>+	.write_infoframe	= sun4i_hdmi_write_infoframe,
>+};
>+
> static const struct drm_connector_helper_funcs sun4i_hdmi_connector_helper_funcs = {
> 	.atomic_check	= sun4i_hdmi_connector_atomic_check,
> 	.mode_valid	= sun4i_hdmi_connector_mode_valid,
> 	.get_modes	= sun4i_hdmi_get_modes,
> };
>@@ -280,15 +287,20 @@ sun4i_hdmi_connector_detect(struct drm_connector *connector, bool force)
> 	}
> 
> 	return connector_status_connected;
> }
> 
>+static void sun4i_hdmi_connector_reset(struct drm_connector *connector)
>+{
>+	drm_atomic_helper_connector_reset(connector);
>+	__drm_atomic_helper_connector_hdmi_reset(connector, connector->state);
>+}
>+
> static const struct drm_connector_funcs sun4i_hdmi_connector_funcs = {
> 	.detect			= sun4i_hdmi_connector_detect,
> 	.fill_modes		= drm_helper_probe_single_connector_modes,
>-	.destroy		= drm_connector_cleanup,
>-	.reset			= drm_atomic_helper_connector_reset,
>+	.reset			= sun4i_hdmi_connector_reset,
> 	.atomic_duplicate_state	= drm_atomic_helper_connector_duplicate_state,
> 	.atomic_destroy_state	= drm_atomic_helper_connector_destroy_state,
> };
> 
> #ifdef CONFIG_DRM_SUN4I_HDMI_CEC
>@@ -643,14 +655,23 @@ static int sun4i_hdmi_bind(struct device *dev, struct device *master,
> 	       hdmi->base + SUN4I_HDMI_CEC);
> #endif
> 
> 	drm_connector_helper_add(&hdmi->connector,
> 				 &sun4i_hdmi_connector_helper_funcs);
>-	ret = drm_connector_init_with_ddc(drm, &hdmi->connector,
>-					  &sun4i_hdmi_connector_funcs,
>-					  DRM_MODE_CONNECTOR_HDMIA,
>-					  hdmi->ddc_i2c);
>+	ret = drmm_connector_hdmi_init(drm, &hdmi->connector,
>+				       /*
>+					* NOTE: Those are likely to be
>+					* wrong, but I couldn't find the
>+					* actual ones in the BSP.
>+					*/
>+				       "AW", "HDMI",
>+				       &sun4i_hdmi_connector_funcs,
>+				       &sun4i_hdmi_hdmi_connector_funcs,
>+				       DRM_MODE_CONNECTOR_HDMIA,
>+				       hdmi->ddc_i2c,
>+				       BIT(HDMI_COLORSPACE_RGB),
>+				       8);
> 	if (ret) {
> 		dev_err(dev,
> 			"Couldn't initialise the HDMI connector\n");
> 		goto err_cleanup_connector;
> 	}
>
>-- 
>2.45.0