On Wed, Jul 11, 2018 at 02:59:03PM -0700, Paulo Zanoni wrote:
> Do like the other functions and check for the ISR bits. We have plans
> to add a few more checks in this code in the next patches, that's why
> it's a little more verbose than it could be.
>
> v2: Rebase.
>
> Cc: Animesh Manna <[email protected]>
> Reviewed-by: Lucas De Marchi <[email protected]> (v1)
> Signed-off-by: Paulo Zanoni <[email protected]>
> Signed-off-by: Rodrigo Vivi <[email protected]>
> ---
> drivers/gpu/drm/i915/i915_reg.h | 4 +++
> drivers/gpu/drm/i915/intel_dp.c | 57
> +++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 61 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index b95bab7a3d24..c1f350469ff6 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -7198,6 +7198,7 @@ enum {
> #define GEN11_TC3_HOTPLUG (1 << 18)
> #define GEN11_TC2_HOTPLUG (1 << 17)
> #define GEN11_TC1_HOTPLUG (1 << 16)
> +#define GEN11_TC_HOTPLUG(tc_port) (1 << ((tc_port) + 16))
> #define GEN11_DE_TC_HOTPLUG_MASK (GEN11_TC4_HOTPLUG | \
> GEN11_TC3_HOTPLUG | \
> GEN11_TC2_HOTPLUG | \
> @@ -7206,6 +7207,7 @@ enum {
> #define GEN11_TBT3_HOTPLUG (1 << 2)
> #define GEN11_TBT2_HOTPLUG (1 << 1)
> #define GEN11_TBT1_HOTPLUG (1 << 0)
> +#define GEN11_TBT_HOTPLUG(tc_port) (1 << (tc_port))
> #define GEN11_DE_TBT_HOTPLUG_MASK (GEN11_TBT4_HOTPLUG | \
> GEN11_TBT3_HOTPLUG | \
> GEN11_TBT2_HOTPLUG | \
> @@ -7578,6 +7580,8 @@ enum {
> #define SDE_GMBUS_ICP (1 << 23)
> #define SDE_DDIB_HOTPLUG_ICP (1 << 17)
> #define SDE_DDIA_HOTPLUG_ICP (1 << 16)
> +#define SDE_TC_HOTPLUG_ICP(tc_port) (1 << ((tc_port) + 24))
> +#define SDE_DDI_HOTPLUG_ICP(port) (1 << ((port) + 16))
> #define SDE_DDI_MASK_ICP (SDE_DDIB_HOTPLUG_ICP | \
> SDE_DDIA_HOTPLUG_ICP)
> #define SDE_TC_MASK_ICP (SDE_TC4_HOTPLUG_ICP | \
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 5be07e1d816d..f2197dea02d0 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -4744,6 +4744,61 @@ static bool bxt_digital_port_connected(struct
> intel_encoder *encoder)
> return I915_READ(GEN8_DE_PORT_ISR) & bit;
> }
>
> +static bool icl_combo_port_connected(struct drm_i915_private *dev_priv,
> + struct intel_digital_port *intel_dig_port)
> +{
> + enum port port = intel_dig_port->base.port;
> +
> + return I915_READ(SDEISR) & SDE_DDI_HOTPLUG_ICP(port);
> +}
> +
> +static bool icl_tc_port_connected(struct drm_i915_private *dev_priv,
> + struct intel_digital_port *intel_dig_port)
> +{
> + enum port port = intel_dig_port->base.port;
> + enum tc_port tc_port = intel_port_to_tc(dev_priv, port);
> + u32 legacy_bit = SDE_TC_HOTPLUG_ICP(tc_port);
> + u32 typec_bit = GEN11_TC_HOTPLUG(tc_port);
> + u32 tbt_bit = GEN11_TBT_HOTPLUG(tc_port);
> + bool is_legacy = false, is_typec = false, is_tbt = false;
> + u32 cpu_isr;
> +
> + if (I915_READ(SDEISR) & legacy_bit)
> + is_legacy = true;
> +
> + cpu_isr = I915_READ(GEN11_DE_HPD_ISR);
> + if (cpu_isr & typec_bit)
> + is_typec = true;
> + if (cpu_isr & tbt_bit)
> + is_tbt = true;
> +
> + WARN_ON(is_legacy + is_typec + is_tbt > 1);
> + if (!is_legacy && !is_typec && !is_tbt)
> + return false;
what about something like below?
+{
+ enum port port = intel_dig_port->base.port;
+ enum tc_port tc_port = intel_port_to_tc(dev_priv, port);
+ bool is_legacy = false, is_typec = false, is_tbt = false;
+ u32 cpu_isr;
+
+ is_legacy = I915_READ(SDEISR) & legacy_bit;
+
+ cpu_isr = I915_READ(GEN11_DE_HPD_ISR);
+ is_typec = cpu_isr & typec_bit;
+ is_tbt = cpu_isr & tbt_bit;
+
+ WARN_ON(is_legacy && (is_typec || is_tbt));
+ return (is_legacy || is_typec || is_tbt);
+}
> +
> +static bool icl_digital_port_connected(struct intel_encoder *encoder)
> +{
> + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> + struct intel_digital_port *dig_port = enc_to_dig_port(&encoder->base);
> +
> + switch (encoder->hpd_pin) {
> + case HPD_PORT_A:
> + case HPD_PORT_B:
> + return icl_combo_port_connected(dev_priv, dig_port);
> + case HPD_PORT_C:
> + case HPD_PORT_D:
> + case HPD_PORT_E:
> + case HPD_PORT_F:
> + return icl_tc_port_connected(dev_priv, dig_port);
> + default:
> + MISSING_CASE(encoder->hpd_pin);
> + return false;
> + }
> +}
> +
> /*
> * intel_digital_port_connected - is the specified port connected?
> * @encoder: intel_encoder
> @@ -4771,6 +4826,8 @@ bool intel_digital_port_connected(struct intel_encoder
> *encoder)
> return bdw_digital_port_connected(encoder);
> else if (IS_GEN9_LP(dev_priv))
> return bxt_digital_port_connected(encoder);
> + else if (IS_ICELAKE(dev_priv))
> + return icl_digital_port_connected(encoder);
this is messing the order and getting hard to read.
probably better to invert the order in a separated patch and then
put ICL on top.
> else
> return spt_digital_port_connected(encoder);
> }
> --
> 2.14.4
>
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