[Intel-gfx] [PATCH v7 07/15] drm/i915/dg1: add hpd interrupt handling
Aditya Swarup
aditya.swarup at intel.com
Mon Oct 12 22:51:29 UTC 2020
On 10/12/20 2:29 PM, Lucas De Marchi wrote:
> DG1 has one more combo phy port, no TC and all irq handling goes through
> SDE, like for MCC.
>
> v2: Also change intel_hpd_pin_default() to include DG1 mapping
> v3: Rebase on hpd refactor
>
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Cc: Anshuman Gupta <anshuman.gupta at intel.com>
> Cc: José Roberto de Souza <jose.souza at intel.com>
> Cc: Imre Deak <imre.deak at intel.com>
> Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
> ---
> drivers/gpu/drm/i915/i915_irq.c | 58 +++++++++++++++++++++++++++++----
> drivers/gpu/drm/i915/i915_reg.h | 8 +++++
> 2 files changed, 59 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> index b753c77c9a77..0d6e4894b505 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -152,6 +152,13 @@ static const u32 hpd_icp[HPD_NUM_PINS] = {
> [HPD_PORT_TC6] = SDE_TC_HOTPLUG_ICP(PORT_TC6),
> };
>
> +static const u32 hpd_dg1_sde[HPD_NUM_PINS] = {
> + [HPD_PORT_A] = SDE_DDI_HOTPLUG_ICP(PHY_A),
> + [HPD_PORT_B] = SDE_DDI_HOTPLUG_ICP(PHY_B),
> + [HPD_PORT_D] = SDE_DDI_HOTPLUG_ICP(PHY_C),
> + [HPD_PORT_E] = SDE_DDI_HOTPLUG_ICP(PHY_D),
> +};
> +
> static void intel_hpd_init_pins(struct drm_i915_private *dev_priv)
> {
> struct i915_hotplug *hpd = &dev_priv->hotplug;
> @@ -176,11 +183,14 @@ static void intel_hpd_init_pins(struct drm_i915_private *dev_priv)
> else
> hpd->hpd = hpd_ilk;
>
> - if (!HAS_PCH_SPLIT(dev_priv) || HAS_PCH_NOP(dev_priv))
> + if ((INTEL_PCH_TYPE(dev_priv) < PCH_DG1) &&
> + (!HAS_PCH_SPLIT(dev_priv) || HAS_PCH_NOP(dev_priv)))
> return;
>
> - if (HAS_PCH_TGP(dev_priv) || HAS_PCH_JSP(dev_priv) ||
> - HAS_PCH_ICP(dev_priv) || HAS_PCH_MCC(dev_priv))
> + if (HAS_PCH_DG1(dev_priv))
> + hpd->pch_hpd = hpd_dg1_sde;
> + else if (HAS_PCH_TGP(dev_priv) || HAS_PCH_JSP(dev_priv) ||
> + HAS_PCH_ICP(dev_priv) || HAS_PCH_MCC(dev_priv))
> hpd->pch_hpd = hpd_icp;
> else if (HAS_PCH_CNP(dev_priv) || HAS_PCH_SPT(dev_priv))
> hpd->pch_hpd = hpd_spt;
> @@ -1079,6 +1089,22 @@ static bool icp_ddi_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
> }
> }
>
> +static bool dg1_ddi_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
> +{
> + switch (pin) {
> + case HPD_PORT_A:
> + return val & SHOTPLUG_CTL_DDI_HPD_LONG_DETECT(PORT_A);
> + case HPD_PORT_B:
> + return val & SHOTPLUG_CTL_DDI_HPD_LONG_DETECT(PORT_B);
> + case HPD_PORT_D:
> + return val & SHOTPLUG_CTL_DDI_HPD_LONG_DETECT(PORT_C);
> + case HPD_PORT_E:
> + return val & SHOTPLUG_CTL_DDI_HPD_LONG_DETECT(PORT_D);
> + default:
> + return false;
> + }
> +}
> +
> static bool icp_tc_port_hotplug_long_detect(enum hpd_pin pin, u32 val)
> {
> switch (pin) {
> @@ -1863,12 +1889,19 @@ static void icp_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
> {
> u32 ddi_hotplug_trigger, tc_hotplug_trigger;
> u32 pin_mask = 0, long_mask = 0;
> + bool (*ddi_port_hotplug_long_detect)(enum hpd_pin pin, u32 val);
>
> - if (HAS_PCH_TGP(dev_priv)) {
> + if (HAS_PCH_DG1(dev_priv)) {
> + ddi_hotplug_trigger = pch_iir & SDE_DDI_MASK_DG1;
> + ddi_port_hotplug_long_detect = dg1_ddi_port_hotplug_long_detect;
> + tc_hotplug_trigger = 0;
> + } else if (HAS_PCH_TGP(dev_priv)) {
> ddi_hotplug_trigger = pch_iir & SDE_DDI_MASK_TGP;
> + ddi_port_hotplug_long_detect = icp_ddi_port_hotplug_long_detect;
> tc_hotplug_trigger = pch_iir & SDE_TC_MASK_TGP;
> } else if (HAS_PCH_JSP(dev_priv)) {
> ddi_hotplug_trigger = pch_iir & SDE_DDI_MASK_TGP;
> + ddi_port_hotplug_long_detect = icp_ddi_port_hotplug_long_detect;
> tc_hotplug_trigger = 0;
> } else if (HAS_PCH_MCC(dev_priv)) {
> ddi_hotplug_trigger = pch_iir & SDE_DDI_MASK_ICP;
Missing ddi_port_hotplug_long_detect assignment for HAS_PCH_MCC.
Just a suggestion: We can by default assign ddi_port_hotplug_long_detect with icp_ddi_port_hotplug_long_detect
outside the if else branching(during declaration).
Assign the func ptr within platform checks only if it is different from icp like in the case for dg1.
Aditya
> @@ -1879,6 +1912,7 @@ static void icp_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
> INTEL_PCH_TYPE(dev_priv));
>
> ddi_hotplug_trigger = pch_iir & SDE_DDI_MASK_ICP;
> + ddi_port_hotplug_long_detect = icp_ddi_port_hotplug_long_detect;
> tc_hotplug_trigger = pch_iir & SDE_TC_MASK_ICP;
> }
>
> @@ -1891,7 +1925,7 @@ static void icp_irq_handler(struct drm_i915_private *dev_priv, u32 pch_iir)
> intel_get_hpd_pins(dev_priv, &pin_mask, &long_mask,
> ddi_hotplug_trigger, dig_hotplug_reg,
> dev_priv->hotplug.pch_hpd,
> - icp_ddi_port_hotplug_long_detect);
> + ddi_port_hotplug_long_detect);
> }
>
> if (tc_hotplug_trigger) {
> @@ -3252,6 +3286,12 @@ static void jsp_hpd_irq_setup(struct drm_i915_private *dev_priv)
> TGP_DDI_HPD_ENABLE_MASK, 0);
> }
>
> +static void dg1_hpd_irq_setup(struct drm_i915_private *dev_priv)
> +{
> + icp_hpd_irq_setup(dev_priv,
> + DG1_DDI_HPD_ENABLE_MASK, 0);
> +}
> +
> static void gen11_hpd_detection_setup(struct drm_i915_private *dev_priv)
> {
> u32 hotplug;
> @@ -3645,7 +3685,9 @@ static void icp_irq_postinstall(struct drm_i915_private *dev_priv)
> gen3_assert_iir_is_zero(&dev_priv->uncore, SDEIIR);
> I915_WRITE(SDEIMR, ~mask);
>
> - if (HAS_PCH_TGP(dev_priv)) {
> + if (HAS_PCH_DG1(dev_priv))
> + icp_ddi_hpd_detection_setup(dev_priv, DG1_DDI_HPD_ENABLE_MASK);
> + else if (HAS_PCH_TGP(dev_priv)) {
> icp_ddi_hpd_detection_setup(dev_priv, TGP_DDI_HPD_ENABLE_MASK);
> icp_tc_hpd_detection_setup(dev_priv, TGP_TC_HPD_ENABLE_MASK);
> } else if (HAS_PCH_JSP(dev_priv)) {
> @@ -4162,7 +4204,9 @@ void intel_irq_init(struct drm_i915_private *dev_priv)
> if (I915_HAS_HOTPLUG(dev_priv))
> dev_priv->display.hpd_irq_setup = i915_hpd_irq_setup;
> } else {
> - if (HAS_PCH_JSP(dev_priv))
> + if (HAS_PCH_DG1(dev_priv))
> + dev_priv->display.hpd_irq_setup = dg1_hpd_irq_setup;
> + else if (HAS_PCH_JSP(dev_priv))
> dev_priv->display.hpd_irq_setup = jsp_hpd_irq_setup;
> else if (HAS_PCH_MCC(dev_priv))
> dev_priv->display.hpd_irq_setup = mcc_hpd_irq_setup;
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 49945e33f573..e7f1aac553d0 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -8230,6 +8230,10 @@ enum {
> SDE_TC_HOTPLUG_ICP(PORT_TC3) | \
> SDE_TC_HOTPLUG_ICP(PORT_TC2) | \
> SDE_TC_HOTPLUG_ICP(PORT_TC1))
> +#define SDE_DDI_MASK_DG1 (SDE_DDI_HOTPLUG_ICP(PORT_D) | \
> + SDE_DDI_HOTPLUG_ICP(PORT_C) | \
> + SDE_DDI_HOTPLUG_ICP(PORT_B) | \
> + SDE_DDI_HOTPLUG_ICP(PORT_A))
>
> #define SDEISR _MMIO(0xc4000)
> #define SDEIMR _MMIO(0xc4004)
> @@ -8429,6 +8433,10 @@ enum {
> #define TGP_TC_HPD_ENABLE_MASK (ICP_TC_HPD_ENABLE(PORT_TC6) | \
> ICP_TC_HPD_ENABLE(PORT_TC5) | \
> ICP_TC_HPD_ENABLE_MASK)
> +#define DG1_DDI_HPD_ENABLE_MASK (SHOTPLUG_CTL_DDI_HPD_ENABLE(PORT_D) | \
> + SHOTPLUG_CTL_DDI_HPD_ENABLE(PORT_C) | \
> + SHOTPLUG_CTL_DDI_HPD_ENABLE(PORT_B) | \
> + SHOTPLUG_CTL_DDI_HPD_ENABLE(PORT_A))
>
> #define _PCH_DPLL_A 0xc6014
> #define _PCH_DPLL_B 0xc6018
>
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