[Intel-gfx] [PATCH v2] drm/scdc-helper: Pimp SCDC debugs
Andrzej Hajda
andrzej.hajda at intel.com
Tue Apr 4 08:13:58 UTC 2023
On 04.04.2023 00:36, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> Include the device and connector information in the SCDC
> debugs. Makes it easier to figure out who did what.
>
> v2: Rely on connector->ddc (Maxime)
>
> Cc: Andrzej Hajda <andrzej.hajda at intel.com>
> Cc: Neil Armstrong <neil.armstrong at linaro.org>
> Cc: Robert Foss <rfoss at kernel.org>
> Cc: Laurent Pinchart <Laurent.pinchart at ideasonboard.com>
> Cc: Jonas Karlman <jonas at kwiboo.se>
> Cc: Jernej Skrabec <jernej.skrabec at gmail.com>
> Cc: Thierry Reding <thierry.reding at gmail.com>
> Cc: Emma Anholt <emma at anholt.net>
> Cc: Maxime Ripard <mripard at kernel.org>
> Cc: intel-gfx at lists.freedesktop.org
> Cc: linux-tegra at vger.kernel.org
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Reviewed-by: Andrzej Hajda <andrzej.hajda at intel.com>
Regards
Andrzej
> ---
> drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 8 ++--
> drivers/gpu/drm/display/drm_scdc_helper.c | 46 +++++++++++++++--------
> drivers/gpu/drm/i915/display/intel_ddi.c | 4 +-
> drivers/gpu/drm/i915/display/intel_hdmi.c | 8 +---
> drivers/gpu/drm/tegra/sor.c | 15 +++-----
> drivers/gpu/drm/vc4/vc4_hdmi.c | 21 ++++++-----
> include/drm/display/drm_scdc_helper.h | 7 ++--
> 7 files changed, 59 insertions(+), 50 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index aa51c61a78c7..603bb3c51027 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -1426,9 +1426,9 @@ void dw_hdmi_set_high_tmds_clock_ratio(struct dw_hdmi *hdmi,
> /* Control for TMDS Bit Period/TMDS Clock-Period Ratio */
> if (dw_hdmi_support_scdc(hdmi, display)) {
> if (mtmdsclock > HDMI14_MAX_TMDSCLK)
> - drm_scdc_set_high_tmds_clock_ratio(hdmi->ddc, 1);
> + drm_scdc_set_high_tmds_clock_ratio(&hdmi->connector, 1);
> else
> - drm_scdc_set_high_tmds_clock_ratio(hdmi->ddc, 0);
> + drm_scdc_set_high_tmds_clock_ratio(&hdmi->connector, 0);
> }
> }
> EXPORT_SYMBOL_GPL(dw_hdmi_set_high_tmds_clock_ratio);
> @@ -2116,7 +2116,7 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
> min_t(u8, bytes, SCDC_MIN_SOURCE_VERSION));
>
> /* Enabled Scrambling in the Sink */
> - drm_scdc_set_scrambling(hdmi->ddc, 1);
> + drm_scdc_set_scrambling(&hdmi->connector, 1);
>
> /*
> * To activate the scrambler feature, you must ensure
> @@ -2132,7 +2132,7 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
> hdmi_writeb(hdmi, 0, HDMI_FC_SCRAMBLER_CTRL);
> hdmi_writeb(hdmi, (u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ,
> HDMI_MC_SWRSTZ);
> - drm_scdc_set_scrambling(hdmi->ddc, 0);
> + drm_scdc_set_scrambling(&hdmi->connector, 0);
> }
> }
>
> diff --git a/drivers/gpu/drm/display/drm_scdc_helper.c b/drivers/gpu/drm/display/drm_scdc_helper.c
> index c3ad4ab2b456..6d2f244e5830 100644
> --- a/drivers/gpu/drm/display/drm_scdc_helper.c
> +++ b/drivers/gpu/drm/display/drm_scdc_helper.c
> @@ -26,6 +26,8 @@
> #include <linux/delay.h>
>
> #include <drm/display/drm_scdc_helper.h>
> +#include <drm/drm_connector.h>
> +#include <drm/drm_device.h>
> #include <drm/drm_print.h>
>
> /**
> @@ -140,7 +142,7 @@ EXPORT_SYMBOL(drm_scdc_write);
>
> /**
> * drm_scdc_get_scrambling_status - what is status of scrambling?
> - * @adapter: I2C adapter for DDC channel
> + * @connector: connector
> *
> * Reads the scrambler status over SCDC, and checks the
> * scrambling status.
> @@ -148,14 +150,16 @@ EXPORT_SYMBOL(drm_scdc_write);
> * Returns:
> * True if the scrambling is enabled, false otherwise.
> */
> -bool drm_scdc_get_scrambling_status(struct i2c_adapter *adapter)
> +bool drm_scdc_get_scrambling_status(struct drm_connector *connector)
> {
> u8 status;
> int ret;
>
> - ret = drm_scdc_readb(adapter, SCDC_SCRAMBLER_STATUS, &status);
> + ret = drm_scdc_readb(connector->ddc, SCDC_SCRAMBLER_STATUS, &status);
> if (ret < 0) {
> - DRM_DEBUG_KMS("Failed to read scrambling status: %d\n", ret);
> + drm_dbg_kms(connector->dev,
> + "[CONNECTOR:%d:%s] Failed to read scrambling status: %d\n",
> + connector->base.id, connector->name, ret);
> return false;
> }
>
> @@ -165,7 +169,7 @@ EXPORT_SYMBOL(drm_scdc_get_scrambling_status);
>
> /**
> * drm_scdc_set_scrambling - enable scrambling
> - * @adapter: I2C adapter for DDC channel
> + * @connector: connector
> * @enable: bool to indicate if scrambling is to be enabled/disabled
> *
> * Writes the TMDS config register over SCDC channel, and:
> @@ -175,14 +179,17 @@ EXPORT_SYMBOL(drm_scdc_get_scrambling_status);
> * Returns:
> * True if scrambling is set/reset successfully, false otherwise.
> */
> -bool drm_scdc_set_scrambling(struct i2c_adapter *adapter, bool enable)
> +bool drm_scdc_set_scrambling(struct drm_connector *connector,
> + bool enable)
> {
> u8 config;
> int ret;
>
> - ret = drm_scdc_readb(adapter, SCDC_TMDS_CONFIG, &config);
> + ret = drm_scdc_readb(connector->ddc, SCDC_TMDS_CONFIG, &config);
> if (ret < 0) {
> - DRM_DEBUG_KMS("Failed to read TMDS config: %d\n", ret);
> + drm_dbg_kms(connector->dev,
> + "[CONNECTOR:%d:%s] Failed to read TMDS config: %d\n",
> + connector->base.id, connector->name, ret);
> return false;
> }
>
> @@ -191,9 +198,11 @@ bool drm_scdc_set_scrambling(struct i2c_adapter *adapter, bool enable)
> else
> config &= ~SCDC_SCRAMBLING_ENABLE;
>
> - ret = drm_scdc_writeb(adapter, SCDC_TMDS_CONFIG, config);
> + ret = drm_scdc_writeb(connector->ddc, SCDC_TMDS_CONFIG, config);
> if (ret < 0) {
> - DRM_DEBUG_KMS("Failed to enable scrambling: %d\n", ret);
> + drm_dbg_kms(connector->dev,
> + "[CONNECTOR:%d:%s] Failed to enable scrambling: %d\n",
> + connector->base.id, connector->name, ret);
> return false;
> }
>
> @@ -203,7 +212,7 @@ EXPORT_SYMBOL(drm_scdc_set_scrambling);
>
> /**
> * drm_scdc_set_high_tmds_clock_ratio - set TMDS clock ratio
> - * @adapter: I2C adapter for DDC channel
> + * @connector: connector
> * @set: ret or reset the high clock ratio
> *
> *
> @@ -230,14 +239,17 @@ EXPORT_SYMBOL(drm_scdc_set_scrambling);
> * Returns:
> * True if write is successful, false otherwise.
> */
> -bool drm_scdc_set_high_tmds_clock_ratio(struct i2c_adapter *adapter, bool set)
> +bool drm_scdc_set_high_tmds_clock_ratio(struct drm_connector *connector,
> + bool set)
> {
> u8 config;
> int ret;
>
> - ret = drm_scdc_readb(adapter, SCDC_TMDS_CONFIG, &config);
> + ret = drm_scdc_readb(connector->ddc, SCDC_TMDS_CONFIG, &config);
> if (ret < 0) {
> - DRM_DEBUG_KMS("Failed to read TMDS config: %d\n", ret);
> + drm_dbg_kms(connector->dev,
> + "[CONNECTOR:%d:%s] Failed to read TMDS config: %d\n",
> + connector->base.id, connector->name, ret);
> return false;
> }
>
> @@ -246,9 +258,11 @@ bool drm_scdc_set_high_tmds_clock_ratio(struct i2c_adapter *adapter, bool set)
> else
> config &= ~SCDC_TMDS_BIT_CLOCK_RATIO_BY_40;
>
> - ret = drm_scdc_writeb(adapter, SCDC_TMDS_CONFIG, config);
> + ret = drm_scdc_writeb(connector->ddc, SCDC_TMDS_CONFIG, config);
> if (ret < 0) {
> - DRM_DEBUG_KMS("Failed to set TMDS clock ratio: %d\n", ret);
> + drm_dbg_kms(connector->dev,
> + "[CONNECTOR:%d:%s] Failed to set TMDS clock ratio: %d\n",
> + connector->base.id, connector->name, ret);
> return false;
> }
>
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
> index dc294717bcdf..d0bb3a52ae5c 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> @@ -3974,8 +3974,8 @@ static int intel_hdmi_reset_link(struct intel_encoder *encoder,
>
> ret = drm_scdc_readb(adapter, SCDC_TMDS_CONFIG, &config);
> if (ret < 0) {
> - drm_err(&dev_priv->drm, "Failed to read TMDS config: %d\n",
> - ret);
> + drm_err(&dev_priv->drm, "[CONNECTOR:%d:%s] Failed to read TMDS config: %d\n",
> + connector->base.base.id, connector->base.name, ret);
> return 0;
> }
>
> diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
> index c7e9e1fbed37..a690a5616506 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
> @@ -2646,11 +2646,8 @@ bool intel_hdmi_handle_sink_scrambling(struct intel_encoder *encoder,
> bool scrambling)
> {
> struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> - struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
> struct drm_scrambling *sink_scrambling =
> &connector->display_info.hdmi.scdc.scrambling;
> - struct i2c_adapter *adapter =
> - intel_gmbus_get_adapter(dev_priv, intel_hdmi->ddc_bus);
>
> if (!sink_scrambling->supported)
> return true;
> @@ -2661,9 +2658,8 @@ bool intel_hdmi_handle_sink_scrambling(struct intel_encoder *encoder,
> str_yes_no(scrambling), high_tmds_clock_ratio ? 40 : 10);
>
> /* Set TMDS bit clock ratio to 1/40 or 1/10, and enable/disable scrambling */
> - return drm_scdc_set_high_tmds_clock_ratio(adapter,
> - high_tmds_clock_ratio) &&
> - drm_scdc_set_scrambling(adapter, scrambling);
> + return drm_scdc_set_high_tmds_clock_ratio(connector, high_tmds_clock_ratio) &&
> + drm_scdc_set_scrambling(connector, scrambling);
> }
>
> static u8 chv_port_to_ddc_pin(struct drm_i915_private *dev_priv, enum port port)
> diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c
> index 8af632740673..34af6724914f 100644
> --- a/drivers/gpu/drm/tegra/sor.c
> +++ b/drivers/gpu/drm/tegra/sor.c
> @@ -2140,10 +2140,8 @@ static void tegra_sor_hdmi_disable_scrambling(struct tegra_sor *sor)
>
> static void tegra_sor_hdmi_scdc_disable(struct tegra_sor *sor)
> {
> - struct i2c_adapter *ddc = sor->output.ddc;
> -
> - drm_scdc_set_high_tmds_clock_ratio(ddc, false);
> - drm_scdc_set_scrambling(ddc, false);
> + drm_scdc_set_high_tmds_clock_ratio(&sor->output.connector, false);
> + drm_scdc_set_scrambling(&sor->output.connector, false);
>
> tegra_sor_hdmi_disable_scrambling(sor);
> }
> @@ -2168,10 +2166,8 @@ static void tegra_sor_hdmi_enable_scrambling(struct tegra_sor *sor)
>
> static void tegra_sor_hdmi_scdc_enable(struct tegra_sor *sor)
> {
> - struct i2c_adapter *ddc = sor->output.ddc;
> -
> - drm_scdc_set_high_tmds_clock_ratio(ddc, true);
> - drm_scdc_set_scrambling(ddc, true);
> + drm_scdc_set_high_tmds_clock_ratio(&sor->output.connector, true);
> + drm_scdc_set_scrambling(&sor->output.connector, true);
>
> tegra_sor_hdmi_enable_scrambling(sor);
> }
> @@ -2179,9 +2175,8 @@ static void tegra_sor_hdmi_scdc_enable(struct tegra_sor *sor)
> static void tegra_sor_hdmi_scdc_work(struct work_struct *work)
> {
> struct tegra_sor *sor = container_of(work, struct tegra_sor, scdc.work);
> - struct i2c_adapter *ddc = sor->output.ddc;
>
> - if (!drm_scdc_get_scrambling_status(ddc)) {
> + if (!drm_scdc_get_scrambling_status(&sor->output.connector)) {
> DRM_DEBUG_KMS("SCDC not scrambled\n");
> tegra_sor_hdmi_scdc_enable(sor);
> }
> diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
> index 464c3cc8e6fb..06713d8b82b5 100644
> --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
> +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
> @@ -885,7 +885,8 @@ static void vc4_hdmi_set_infoframes(struct drm_encoder *encoder)
> static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder)
> {
> struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
> - struct drm_device *drm = vc4_hdmi->connector.dev;
> + struct drm_connector *connector = &vc4_hdmi->connector;
> + struct drm_device *drm = connector->dev;
> const struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
> unsigned long flags;
> int idx;
> @@ -903,8 +904,8 @@ static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder)
> if (!drm_dev_enter(drm, &idx))
> return;
>
> - drm_scdc_set_high_tmds_clock_ratio(vc4_hdmi->ddc, true);
> - drm_scdc_set_scrambling(vc4_hdmi->ddc, true);
> + drm_scdc_set_high_tmds_clock_ratio(connector, true);
> + drm_scdc_set_scrambling(connector, true);
>
> spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
> HDMI_WRITE(HDMI_SCRAMBLER_CTL, HDMI_READ(HDMI_SCRAMBLER_CTL) |
> @@ -922,7 +923,8 @@ static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder)
> static void vc4_hdmi_disable_scrambling(struct drm_encoder *encoder)
> {
> struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
> - struct drm_device *drm = vc4_hdmi->connector.dev;
> + struct drm_connector *connector = &vc4_hdmi->connector;
> + struct drm_device *drm = connector->dev;
> unsigned long flags;
> int idx;
>
> @@ -944,8 +946,8 @@ static void vc4_hdmi_disable_scrambling(struct drm_encoder *encoder)
> ~VC5_HDMI_SCRAMBLER_CTL_ENABLE);
> spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
>
> - drm_scdc_set_scrambling(vc4_hdmi->ddc, false);
> - drm_scdc_set_high_tmds_clock_ratio(vc4_hdmi->ddc, false);
> + drm_scdc_set_scrambling(connector, false);
> + drm_scdc_set_high_tmds_clock_ratio(connector, false);
>
> drm_dev_exit(idx);
> }
> @@ -955,12 +957,13 @@ static void vc4_hdmi_scrambling_wq(struct work_struct *work)
> struct vc4_hdmi *vc4_hdmi = container_of(to_delayed_work(work),
> struct vc4_hdmi,
> scrambling_work);
> + struct drm_connector *connector = &vc4_hdmi->connector;
>
> - if (drm_scdc_get_scrambling_status(vc4_hdmi->ddc))
> + if (drm_scdc_get_scrambling_status(connector))
> return;
>
> - drm_scdc_set_high_tmds_clock_ratio(vc4_hdmi->ddc, true);
> - drm_scdc_set_scrambling(vc4_hdmi->ddc, true);
> + drm_scdc_set_high_tmds_clock_ratio(connector, true);
> + drm_scdc_set_scrambling(connector, true);
>
> queue_delayed_work(system_wq, &vc4_hdmi->scrambling_work,
> msecs_to_jiffies(SCRAMBLING_POLLING_DELAY_MS));
> diff --git a/include/drm/display/drm_scdc_helper.h b/include/drm/display/drm_scdc_helper.h
> index ded01fd948b4..34600476a1b9 100644
> --- a/include/drm/display/drm_scdc_helper.h
> +++ b/include/drm/display/drm_scdc_helper.h
> @@ -28,6 +28,7 @@
>
> #include <drm/display/drm_scdc.h>
>
> +struct drm_connector;
> struct i2c_adapter;
>
> ssize_t drm_scdc_read(struct i2c_adapter *adapter, u8 offset, void *buffer,
> @@ -71,9 +72,9 @@ static inline int drm_scdc_writeb(struct i2c_adapter *adapter, u8 offset,
> return drm_scdc_write(adapter, offset, &value, sizeof(value));
> }
>
> -bool drm_scdc_get_scrambling_status(struct i2c_adapter *adapter);
> +bool drm_scdc_get_scrambling_status(struct drm_connector *connector);
>
> -bool drm_scdc_set_scrambling(struct i2c_adapter *adapter, bool enable);
> -bool drm_scdc_set_high_tmds_clock_ratio(struct i2c_adapter *adapter, bool set);
> +bool drm_scdc_set_scrambling(struct drm_connector *connector, bool enable);
> +bool drm_scdc_set_high_tmds_clock_ratio(struct drm_connector *connector, bool set);
>
> #endif
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