From 4c27283415ec9e352d0d336ac45717d5e408ce3c Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Wed, 1 Apr 2015 10:58:05 +0300 Subject: [PATCH] drm/i915: add bxt gmbus support For BXT gmbus is pulled from PCH to CPU. From implementation point of view only pin pair configuration will change. The existing implementation supports all platforms previous to GEN8 and also SKL. But for BXT pin pair configuration is completely different than SKL or other previous GEN's. This patch introduces the new pin pair configuration structure specific to BXT and also ensures every real gmbus port has a gpio pin. v3 by Jani: with the platform independent prep work in place, the bxt enabling reduces to a fairly trivial patch. Credits are due Sunil for giving me the ideas (with his patches) what the platform independent parts should look like. v4: Fix intel_hdmi_init_connector() for bxt. Abstract gmbus_pin access more. s/GPU/PCH/ in commit message. v5: Rebase. Issue: VIZ-3574 Signed-off-by: A.Sunil Kamath Signed-off-by: Jani Nikula Reviewed-by: Imre Deak Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_reg.h | 3 +++ drivers/gpu/drm/i915/intel_hdmi.c | 14 +++++++++++--- drivers/gpu/drm/i915/intel_i2c.c | 30 +++++++++++++++++++++++++++--- 3 files changed, 41 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 87d9c0fbc7d9..9ef716a5093c 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1794,6 +1794,9 @@ enum skl_disp_power_wells { #define GMBUS_PIN_DPB 5 /* SDVO, HDMIB */ #define GMBUS_PIN_DPD 6 /* HDMID */ #define GMBUS_PIN_RESERVED 7 /* 7 reserved */ +#define GMBUS_PIN_1_BXT 1 +#define GMBUS_PIN_2_BXT 2 +#define GMBUS_PIN_3_BXT 3 #define GMBUS_NUM_PINS 7 /* including 0 */ #define GMBUS1 0x5104 /* command/status */ #define GMBUS_SW_CLR_INT (1<<31) diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index 02252d9a0cc3..7dfc3584b6b4 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -1681,15 +1681,23 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port, switch (port) { case PORT_B: - intel_hdmi->ddc_bus = GMBUS_PIN_DPB; + if (IS_BROXTON(dev_priv)) + intel_hdmi->ddc_bus = GMBUS_PIN_1_BXT; + else + intel_hdmi->ddc_bus = GMBUS_PIN_DPB; intel_encoder->hpd_pin = HPD_PORT_B; break; case PORT_C: - intel_hdmi->ddc_bus = GMBUS_PIN_DPC; + if (IS_BROXTON(dev_priv)) + intel_hdmi->ddc_bus = GMBUS_PIN_2_BXT; + else + intel_hdmi->ddc_bus = GMBUS_PIN_DPC; intel_encoder->hpd_pin = HPD_PORT_C; break; case PORT_D: - if (IS_CHERRYVIEW(dev)) + if (WARN_ON(IS_BROXTON(dev_priv))) + intel_hdmi->ddc_bus = GMBUS_PIN_DISABLED; + else if (IS_CHERRYVIEW(dev_priv)) intel_hdmi->ddc_bus = GMBUS_PIN_DPD_CHV; else intel_hdmi->ddc_bus = GMBUS_PIN_DPD; diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c index ec9cc8cf642e..cadbc17d2775 100644 --- a/drivers/gpu/drm/i915/intel_i2c.c +++ b/drivers/gpu/drm/i915/intel_i2c.c @@ -49,10 +49,33 @@ static const struct gmbus_pin gmbus_pins[] = { [GMBUS_PIN_DPD] = { "dpd", GPIOF }, }; +static const struct gmbus_pin gmbus_pins_bxt[] = { + [GMBUS_PIN_1_BXT] = { "dpb", PCH_GPIOB }, + [GMBUS_PIN_2_BXT] = { "dpc", PCH_GPIOC }, + [GMBUS_PIN_3_BXT] = { "misc", PCH_GPIOD }, +}; + +/* pin is expected to be valid */ +static const struct gmbus_pin *get_gmbus_pin(struct drm_i915_private *dev_priv, + unsigned int pin) +{ + if (IS_BROXTON(dev_priv)) + return &gmbus_pins_bxt[pin]; + else + return &gmbus_pins[pin]; +} + bool intel_gmbus_is_valid_pin(struct drm_i915_private *dev_priv, unsigned int pin) { - return pin < ARRAY_SIZE(gmbus_pins) && gmbus_pins[pin].reg; + unsigned int size; + + if (IS_BROXTON(dev_priv)) + size = ARRAY_SIZE(gmbus_pins_bxt); + else + size = ARRAY_SIZE(gmbus_pins); + + return pin < size && get_gmbus_pin(dev_priv, pin)->reg; } /* Intel GPIO access functions */ @@ -196,7 +219,8 @@ intel_gpio_setup(struct intel_gmbus *bus, unsigned int pin) algo = &bus->bit_algo; - bus->gpio_reg = dev_priv->gpio_mmio_base + gmbus_pins[pin].reg; + bus->gpio_reg = dev_priv->gpio_mmio_base + + get_gmbus_pin(dev_priv, pin)->reg; bus->adapter.algo_data = algo; algo->setsda = set_data; @@ -550,7 +574,7 @@ int intel_setup_gmbus(struct drm_device *dev) snprintf(bus->adapter.name, sizeof(bus->adapter.name), "i915 gmbus %s", - gmbus_pins[pin].name); + get_gmbus_pin(dev_priv, pin)->name); bus->adapter.dev.parent = &dev->pdev->dev; bus->dev_priv = dev_priv; -- 2.34.1