From: Ville Syrjälä Date: Mon, 9 Nov 2015 15:48:19 +0000 (+0100) Subject: drm/i915: Introduce a gmbus power domain X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f0ab43e6;p=linux-beck.git drm/i915: Introduce a gmbus power domain Currently the gmbus code uses intel_aux_display_runtime_get/put in an effort to make sure the hardware is powered up sufficiently for gmbus. That function only takes the runtime PM reference which on VLV/CHV/BXT is not enough. We need the disp2d/pipe-a well on VLV/CHV and power well 2 on BXT. So add a new power domnain for gmbus and kill off the now unused intel_aux_display_runtime_get/put. And change intel_hdmi_set_edid() to use the gmbus power domain too since that's all we need there. Also toss in a BUILD_BUG_ON() to catch problems if we run out of bits for power domains. We're already really close to the limit... [Patrik: Add gmbus string to debugfs output] Signed-off-by: Ville Syrjälä Reviewed-by: Patrik Jakobsson Signed-off-by: Imre Deak Link: http://patchwork.freedesktop.org/patch/msgid/1447084107-8521-5-git-send-email-patrik.jakobsson@linux.intel.com --- diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index e38a89bb7d59..464fceb17d6d 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -2745,6 +2745,8 @@ static const char *power_domain_str(enum intel_display_power_domain domain) return "AUX_C"; case POWER_DOMAIN_AUX_D: return "AUX_D"; + case POWER_DOMAIN_GMBUS: + return "GMBUS"; case POWER_DOMAIN_INIT: return "INIT"; default: diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index b9ed2274f8b1..648184ecd357 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -199,6 +199,7 @@ enum intel_display_power_domain { POWER_DOMAIN_AUX_B, POWER_DOMAIN_AUX_C, POWER_DOMAIN_AUX_D, + POWER_DOMAIN_GMBUS, POWER_DOMAIN_INIT, POWER_DOMAIN_NUM, diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index b11db045c18b..ddc83ff443e1 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -1428,8 +1428,6 @@ void intel_display_power_get(struct drm_i915_private *dev_priv, enum intel_display_power_domain domain); void intel_display_power_put(struct drm_i915_private *dev_priv, enum intel_display_power_domain domain); -void intel_aux_display_runtime_get(struct drm_i915_private *dev_priv); -void intel_aux_display_runtime_put(struct drm_i915_private *dev_priv); void intel_runtime_pm_get(struct drm_i915_private *dev_priv); void intel_runtime_pm_get_noresume(struct drm_i915_private *dev_priv); void intel_runtime_pm_put(struct drm_i915_private *dev_priv); diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index bccbe701649b..47d3f5ae3850 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -1346,21 +1346,17 @@ intel_hdmi_set_edid(struct drm_connector *connector, bool force) { struct drm_i915_private *dev_priv = to_i915(connector->dev); struct intel_hdmi *intel_hdmi = intel_attached_hdmi(connector); - struct intel_encoder *intel_encoder = - &hdmi_to_dig_port(intel_hdmi)->base; - enum intel_display_power_domain power_domain; struct edid *edid = NULL; bool connected = false; - power_domain = intel_display_port_power_domain(intel_encoder); - intel_display_power_get(dev_priv, power_domain); + intel_display_power_get(dev_priv, POWER_DOMAIN_GMBUS); if (force) edid = drm_get_edid(connector, intel_gmbus_get_adapter(dev_priv, intel_hdmi->ddc_bus)); - intel_display_power_put(dev_priv, power_domain); + intel_display_power_put(dev_priv, POWER_DOMAIN_GMBUS); to_intel_connector(connector)->detect_edid = edid; if (edid && edid->input & DRM_EDID_INPUT_DIGITAL) { diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c index bd58da030a34..fe69623f8903 100644 --- a/drivers/gpu/drm/i915/intel_i2c.c +++ b/drivers/gpu/drm/i915/intel_i2c.c @@ -483,7 +483,7 @@ gmbus_xfer(struct i2c_adapter *adapter, int i = 0, inc, try = 0; int ret = 0; - intel_aux_display_runtime_get(dev_priv); + intel_display_power_get(dev_priv, POWER_DOMAIN_GMBUS); mutex_lock(&dev_priv->gmbus_mutex); if (bus->force_bit) { @@ -595,7 +595,9 @@ timeout: out: mutex_unlock(&dev_priv->gmbus_mutex); - intel_aux_display_runtime_put(dev_priv); + + intel_display_power_put(dev_priv, POWER_DOMAIN_GMBUS); + return ret; } diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index d31a934e525c..82f64070dbca 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -341,6 +341,7 @@ static void hsw_set_power_well(struct drm_i915_private *dev_priv, BIT(POWER_DOMAIN_AUX_C) | \ BIT(POWER_DOMAIN_AUDIO) | \ BIT(POWER_DOMAIN_VGA) | \ + BIT(POWER_DOMAIN_GMBUS) | \ BIT(POWER_DOMAIN_INIT)) #define BXT_DISPLAY_POWERWELL_1_POWER_DOMAINS ( \ BXT_DISPLAY_POWERWELL_2_POWER_DOMAINS | \ @@ -1438,6 +1439,7 @@ void intel_display_power_put(struct drm_i915_private *dev_priv, BIT(POWER_DOMAIN_AUX_B) | \ BIT(POWER_DOMAIN_AUX_C) | \ BIT(POWER_DOMAIN_AUX_D) | \ + BIT(POWER_DOMAIN_GMBUS) | \ BIT(POWER_DOMAIN_INIT)) #define HSW_DISPLAY_POWER_DOMAINS ( \ (POWER_DOMAIN_MASK & ~HSW_ALWAYS_ON_POWER_DOMAINS) | \ @@ -1814,6 +1816,8 @@ int intel_power_domains_init(struct drm_i915_private *dev_priv) { struct i915_power_domains *power_domains = &dev_priv->power_domains; + BUILD_BUG_ON(POWER_DOMAIN_NUM > 31); + mutex_init(&power_domains->lock); /* @@ -2085,36 +2089,6 @@ void intel_power_domains_suspend(struct drm_i915_private *dev_priv) intel_display_power_put(dev_priv, POWER_DOMAIN_INIT); } -/** - * intel_aux_display_runtime_get - grab an auxiliary power domain reference - * @dev_priv: i915 device instance - * - * This function grabs a power domain reference for the auxiliary power domain - * (for access to the GMBUS and DP AUX blocks) and ensures that it and all its - * parents are powered up. Therefore users should only grab a reference to the - * innermost power domain they need. - * - * Any power domain reference obtained by this function must have a symmetric - * call to intel_aux_display_runtime_put() to release the reference again. - */ -void intel_aux_display_runtime_get(struct drm_i915_private *dev_priv) -{ - intel_runtime_pm_get(dev_priv); -} - -/** - * intel_aux_display_runtime_put - release an auxiliary power domain reference - * @dev_priv: i915 device instance - * - * This function drops the auxiliary power domain reference obtained by - * intel_aux_display_runtime_get() and might power down the corresponding - * hardware block right away if this is the last reference. - */ -void intel_aux_display_runtime_put(struct drm_i915_private *dev_priv) -{ - intel_runtime_pm_put(dev_priv); -} - /** * intel_runtime_pm_get - grab a runtime pm reference * @dev_priv: i915 device instance