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Date: Thu, 23 May 2024 19:56:59 +0800 (CST)
From: "Andy Yan" <andyshrk@....com>
To: "Maxime Ripard" <mripard@...nel.org>
Cc: "Maarten Lankhorst" <maarten.lankhorst@...ux.intel.com>,
"Thomas Zimmermann" <tzimmermann@...e.de>,
"David Airlie" <airlied@...il.com>,
"Daniel Vetter" <daniel@...ll.ch>,
"Jonathan Corbet" <corbet@....net>,
"Sandy Huang" <hjc@...k-chips.com>,
Heiko Stübner <heiko@...ech.de>,
"Chen-Yu Tsai" <wens@...e.org>,
"Jernej Skrabec" <jernej.skrabec@...il.com>,
"Samuel Holland" <samuel@...lland.org>,
"Andy Yan" <andy.yan@...k-chips.com>,
"Hans Verkuil" <hverkuil@...all.nl>,
"Sebastian Wick" <sebastian.wick@...hat.com>,
Ville Syrjälä <ville.syrjala@...ux.intel.com>,
dri-devel@...ts.freedesktop.org,
linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
linux-rockchip@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
"Sui Jingfeng" <sui.jingfeng@...ux.dev>
Subject: Re:[PATCH v14 28/28] drm/sun4i: hdmi: Switch to HDMI connector
Hi Maxime,
At 2024-05-21 18:14:01, "Maxime Ripard" <mripard@...nel.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@...il.com>
>Acked-by: Sui Jingfeng <sui.jingfeng@...ux.dev>
>Signed-off-by: Maxime Ripard <mripard@...nel.org>
Reviewed-by: Andy Yan <andyshrk@....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
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