Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx> writes:
> From: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
>
> The Graphics System Event(GSE) interrupt bit has a new location in the
> GU_MISC_INTERRUPT_{IIR, ISR, IMR, IER} registers. Since GSE was the only
> DE_MISC interrupt that was enabled, with this change we don't enable/handle
> any of DE_MISC interrupts for gen11. Credits to Paulo for pointing out
> the register change.
>
> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
> [Paulo: bikesheds and rebases]
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_irq.c | 38 ++++++++++++++++++++++++++++++++++++--
> drivers/gpu/drm/i915/i915_reg.h | 7 +++++++
> 2 files changed, 43 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> index 2fd92a886789..dde938bbfb0a 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -2605,7 +2605,8 @@ gen8_de_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl)
> I915_WRITE(GEN8_DE_MISC_IIR, iir);
> ret = IRQ_HANDLED;
>
> - if (iir & GEN8_DE_MISC_GSE) {
> + if (INTEL_GEN(dev_priv) <= 10 &&
> + (iir & GEN8_DE_MISC_GSE)) {
This bit should not be ever set with gen11 so no need to
add extra guards?
> intel_opregion_asle_intr(dev_priv);
> found = true;
> }
> @@ -2943,6 +2944,30 @@ gen11_gt_irq_handler(struct drm_i915_private * const i915,
> spin_unlock(&i915->irq_lock);
> }
>
> +static irqreturn_t
Return is never used for anything, just use void.
> +gen11_gu_misc_irq_handler(struct drm_i915_private *dev_priv, u32 master_ctl)
> +{
> + irqreturn_t ret = IRQ_NONE;
> + u32 iir;
> +
> + if (!(master_ctl & GEN11_GU_MISC_IRQ))
> + return ret;
> +
> + iir = I915_READ(GEN11_GU_MISC_IIR);
This reg seems to out of forcewake domain so
just use raw_reg_read() in here.
> + if (iir) {
just a note that likely(iir) if you want to add emphasis.
> + I915_WRITE(GEN11_GU_MISC_IIR, iir);
raw_reg_write()
-Mika
> + ret = IRQ_HANDLED;
> + if (iir & GEN11_GU_MISC_GSE)
> + intel_opregion_asle_intr(dev_priv);
> + else
> + DRM_ERROR("Unexpected GU Misc interrupt 0x%08x\n", iir);
> + } else {
> + DRM_ERROR("The master control interrupt lied (GU MISC)!\n");
> + }
> +
> + return ret;
> +}
> +
> static irqreturn_t gen11_irq_handler(int irq, void *arg)
> {
> struct drm_i915_private * const i915 = to_i915(arg);
> @@ -2976,6 +3001,8 @@ static irqreturn_t gen11_irq_handler(int irq, void *arg)
> enable_rpm_wakeref_asserts(i915);
> }
>
> + gen11_gu_misc_irq_handler(i915, master_ctl);
> +
> /* Acknowledge and enable interrupts. */
> raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, GEN11_MASTER_IRQ | master_ctl);
>
> @@ -3465,6 +3492,7 @@ static void gen11_irq_reset(struct drm_device *dev)
>
> GEN3_IRQ_RESET(GEN8_DE_PORT_);
> GEN3_IRQ_RESET(GEN8_DE_MISC_);
> + GEN3_IRQ_RESET(GEN11_GU_MISC_);
> GEN3_IRQ_RESET(GEN8_PCU_);
> }
>
> @@ -3908,9 +3936,12 @@ static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
> uint32_t de_pipe_enables;
> u32 de_port_masked = GEN8_AUX_CHANNEL_A;
> u32 de_port_enables;
> - u32 de_misc_masked = GEN8_DE_MISC_GSE | GEN8_DE_EDP_PSR;
> + u32 de_misc_masked = GEN8_DE_EDP_PSR;
> enum pipe pipe;
>
> + if (INTEL_GEN(dev_priv) <= 10)
> + de_misc_masked |= GEN8_DE_MISC_GSE;
> +
> if (INTEL_GEN(dev_priv) >= 9) {
> de_pipe_masked |= GEN9_DE_PIPE_IRQ_FAULT_ERRORS;
> de_port_masked |= GEN9_AUX_CHANNEL_B | GEN9_AUX_CHANNEL_C |
> @@ -4004,10 +4035,13 @@ static void gen11_gt_irq_postinstall(struct drm_i915_private *dev_priv)
> static int gen11_irq_postinstall(struct drm_device *dev)
> {
> struct drm_i915_private *dev_priv = dev->dev_private;
> + u32 gu_misc_masked = GEN11_GU_MISC_GSE;
>
> gen11_gt_irq_postinstall(dev_priv);
> gen8_de_irq_postinstall(dev_priv);
>
> + GEN3_IRQ_INIT(GEN11_GU_MISC_, ~gu_misc_masked, gu_misc_masked);
> +
> I915_WRITE(GEN11_DISPLAY_INT_CTL, GEN11_DISPLAY_IRQ_ENABLE);
>
> I915_WRITE(GEN11_GFX_MSTR_IRQ, GEN11_MASTER_IRQ);
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 196a0eb79272..ca474f6f523c 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -7016,9 +7016,16 @@ enum {
> #define GEN8_PCU_IIR _MMIO(0x444e8)
> #define GEN8_PCU_IER _MMIO(0x444ec)
>
> +#define GEN11_GU_MISC_ISR _MMIO(0x444f0)
> +#define GEN11_GU_MISC_IMR _MMIO(0x444f4)
> +#define GEN11_GU_MISC_IIR _MMIO(0x444f8)
> +#define GEN11_GU_MISC_IER _MMIO(0x444fc)
> +#define GEN11_GU_MISC_GSE (1 << 27)
> +
> #define GEN11_GFX_MSTR_IRQ _MMIO(0x190010)
> #define GEN11_MASTER_IRQ (1 << 31)
> #define GEN11_PCU_IRQ (1 << 30)
> +#define GEN11_GU_MISC_IRQ (1 << 29)
> #define GEN11_DISPLAY_IRQ (1 << 16)
> #define GEN11_GT_DW_IRQ(x) (1 << (x))
> #define GEN11_GT_DW1_IRQ (1 << 1)
> --
> 2.14.3
>
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