[Intel-gfx] [PATCH v3 08/23] drm/i915/tgl: Access the right register when handling PSR interruptions
Anshuman Gupta
anshuman.gupta at intel.com
Mon Aug 26 09:53:55 UTC 2019
On 2019-08-23 at 01:20:40 -0700, Lucas De Marchi wrote:
> From: José Roberto de Souza <jose.souza at intel.com>
>
> For older gens PSR IIR and IMR had a fixed address that was not
> relative to anything, but from TGL those registers moved to each
> transcoder offset.
>
> So here adding a new macro and a new PSR irq handler with the
> transcoder parameter.
>
There are few minor comments below, apart from below comments
patch is looks ok to me.
Reviewed-by: Anshuman Gupta <anshuman.gupta at intel.com>
> Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
> Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_psr.c | 67 ++++++++++++++++++------
> drivers/gpu/drm/i915/display/intel_psr.h | 1 +
> drivers/gpu/drm/i915/i915_irq.c | 52 +++++++++++++++---
> drivers/gpu/drm/i915/i915_reg.h | 10 +++-
> 4 files changed, 107 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
> index 2429328f963e..c33aa16ed038 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -91,20 +91,33 @@ static bool intel_psr2_enabled(struct drm_i915_private *dev_priv,
> static void psr_irq_control(struct drm_i915_private *dev_priv)
> {
> enum transcoder trans = dev_priv->psr.transcoder;
> - u32 val, mask;
> + u32 psr_error, psr_entry, psr_exit, mask, val;
> + i915_reg_t mask_reg;
> +
> + if (INTEL_GEN(dev_priv) >= 12) {
> + psr_error = TRANS_PSR_ERROR;
> + psr_entry = TRANS_PSR_PRE_ENTRY;
> + psr_exit = TRANS_PSR_POST_EXIT;
> + mask_reg = TRANS_PSR_IMR(trans);
> + } else {
> + psr_error = EDP_PSR_ERROR(trans);
> + psr_entry = EDP_PSR_PRE_ENTRY(trans);
> + psr_exit = EDP_PSR_POST_EXIT(trans);
> + mask_reg = EDP_PSR_IMR;
> + }
>
> - mask = EDP_PSR_ERROR(trans);
> + mask = psr_error;
> if (dev_priv->psr.debug & I915_PSR_DEBUG_IRQ)
> - mask |= EDP_PSR_POST_EXIT(trans) | EDP_PSR_PRE_ENTRY(trans);
> + mask |= psr_exit | psr_entry;
>
> /*
> * TODO: when handling multiple PSR instances a global spinlock will be
> * needed to synchronize the value of shared register
> */
> - val = I915_READ(EDP_PSR_IMR);
> - val &= ~EDP_PSR_TRANS_MASK(trans);
> + val = I915_READ(mask_reg);
> + val &= ~(psr_error | psr_entry | psr_exit);
> val |= ~mask;
> - I915_WRITE(EDP_PSR_IMR, val);
> + I915_WRITE(mask_reg, val);
> }
>
> static void psr_event_print(u32 val, bool psr2_enabled)
> @@ -147,9 +160,21 @@ static void psr_event_print(u32 val, bool psr2_enabled)
> void intel_psr_irq_handler(struct drm_i915_private *dev_priv, u32 psr_iir)
> {
> enum transcoder cpu_transcoder = dev_priv->psr.transcoder;
> + u32 psr_error, psr_entry, psr_exit;
> ktime_t time_ns = ktime_get();
>
> - if (psr_iir & EDP_PSR_ERROR(cpu_transcoder)) {
> + if (INTEL_GEN(dev_priv) >= 12) {
> + psr_error = TRANS_PSR_ERROR;
> + psr_entry = TRANS_PSR_PRE_ENTRY;
> + psr_exit = TRANS_PSR_POST_EXIT;
> + } else {
> + psr_error = EDP_PSR_ERROR(cpu_transcoder);
> + psr_entry = EDP_PSR_PRE_ENTRY(cpu_transcoder);
> + psr_exit = EDP_PSR_POST_EXIT(cpu_transcoder);
> + }
> +
> + if (psr_iir & psr_error) {
> + i915_reg_t mask_reg;
> u32 val;
>
> DRM_WARN("[transcoder %s] PSR aux error\n",
> @@ -168,20 +193,25 @@ void intel_psr_irq_handler(struct drm_i915_private *dev_priv, u32 psr_iir)
> * TODO: when handling multiple PSR instances a global spinlock
> * will be needed to synchronize the value of shared register
> */
> - val = I915_READ(EDP_PSR_IMR);
> - val |= EDP_PSR_ERROR(cpu_transcoder);
> - I915_WRITE(EDP_PSR_IMR, val);
> + if (INTEL_GEN(dev_priv) >= 12)
> + mask_reg = TRANS_PSR_IMR(cpu_transcoder);
> + else
> + mask_reg = EDP_PSR_IMR;
> +
> + val = I915_READ(mask_reg);
> + val |= psr_error;
> + I915_WRITE(mask_reg, val);
>
> schedule_work(&dev_priv->psr.work);
> }
>
> - if (psr_iir & EDP_PSR_PRE_ENTRY(cpu_transcoder)) {
> + if (psr_iir & psr_entry) {
> dev_priv->psr.last_entry_attempt = time_ns;
> DRM_DEBUG_KMS("[transcoder %s] PSR entry attempt in 2 vblanks\n",
> transcoder_name(cpu_transcoder));
> }
>
> - if (psr_iir & EDP_PSR_POST_EXIT(cpu_transcoder)) {
> + if (psr_iir & psr_exit) {
> dev_priv->psr.last_exit = time_ns;
> DRM_DEBUG_KMS("[transcoder %s] PSR exit completed\n",
> transcoder_name(cpu_transcoder));
> @@ -632,7 +662,7 @@ static void intel_psr_activate(struct intel_dp *intel_dp)
> struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
>
> if (INTEL_GEN(dev_priv) >= 9 &&
> - psr2_supported(dev_priv, dev_priv->psr.transcoder))
> + transcoder_has_psr2(dev_priv, dev_priv->psr.transcoder))
> WARN_ON(I915_READ(EDP_PSR2_CTL(dev_priv->psr.transcoder)) & EDP_PSR2_ENABLE);
> WARN_ON(I915_READ(EDP_PSR_CTL(dev_priv->psr.transcoder)) & EDP_PSR_ENABLE);
> WARN_ON(dev_priv->psr.active);
> @@ -730,8 +760,13 @@ static void intel_psr_enable_locked(struct drm_i915_private *dev_priv,
> * first time that PSR HW tries to activate so lets keep PSR disabled
> * to avoid any rendering problems.
> */
> - val = I915_READ(EDP_PSR_IIR);
> - val &= EDP_PSR_ERROR(dev_priv->psr.transcoder);
> + if (INTEL_GEN(dev_priv) >= 12) {
> + val = I915_READ(TRANS_PSR_IIR(dev_priv->psr.transcoder));
> + val &= TRANS_PSR_ERROR;
> + } else {
> + val = I915_READ(EDP_PSR_IIR);
> + val &= EDP_PSR_ERROR(dev_priv->psr.transcoder);
> + }
> if (val) {
> dev_priv->psr.sink_not_reliable = true;
> DRM_DEBUG_KMS("PSR interruption error set, not enabling PSR\n");
> @@ -787,7 +822,7 @@ static void intel_psr_exit(struct drm_i915_private *dev_priv)
>
> if (!dev_priv->psr.active) {
> if (INTEL_GEN(dev_priv) >= 9 &&
> - psr2_supported(dev_priv, dev_priv->psr.transcoder)) {
> + transcoder_has_psr2(dev_priv, dev_priv->psr.transcoder)) {
> val = I915_READ(EDP_PSR2_CTL(dev_priv->psr.transcoder));
> WARN_ON(val & EDP_PSR2_ENABLE);
> }
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.h b/drivers/gpu/drm/i915/display/intel_psr.h
> index 46e4de8b8cd5..6570a23a68b2 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.h
> +++ b/drivers/gpu/drm/i915/display/intel_psr.h
> @@ -6,6 +6,7 @@
> #ifndef __INTEL_PSR_H__
> #define __INTEL_PSR_H__
>
> +#include "intel_display.h"
IMO we don't need to include this header.
> #include "intel_frontbuffer.h"
>
> struct drm_i915_private;
> diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
> index 77391d8325bf..6024a6ef1c76 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -2655,11 +2655,22 @@ gen8_de_misc_irq_handler(struct drm_i915_private *dev_priv, u32 iir)
> }
>
> if (iir & GEN8_DE_EDP_PSR) {
> - u32 psr_iir = I915_READ(EDP_PSR_IIR);
> + u32 psr_iir;
> +
> + if (INTEL_GEN(dev_priv) >= 12) {
> + enum transcoder trans = dev_priv->psr.transcoder;
> +
> + psr_iir = I915_READ(TRANS_PSR_IIR(trans));
> + I915_WRITE(TRANS_PSR_IIR(trans), psr_iir);
> + } else {
> + psr_iir = I915_READ(EDP_PSR_IIR);
> + I915_WRITE(EDP_PSR_IIR, psr_iir);
> + }
> +
> + if (psr_iir)
> + found = true;
>
> intel_psr_irq_handler(dev_priv, psr_iir);
> - I915_WRITE(EDP_PSR_IIR, psr_iir);
> - found = true;
> }
>
> if (!found)
> @@ -3279,8 +3290,23 @@ static void gen11_irq_reset(struct drm_i915_private *dev_priv)
>
> intel_uncore_write(uncore, GEN11_DISPLAY_INT_CTL, 0);
>
> - intel_uncore_write(uncore, EDP_PSR_IMR, 0xffffffff);
> - intel_uncore_write(uncore, EDP_PSR_IIR, 0xffffffff);
> + if (INTEL_GEN(dev_priv) >= 12) {
> + enum transcoder trans;
> +
> + for (trans = TRANSCODER_A; trans <= TRANSCODER_D; trans++) {
> + enum intel_display_power_domain domain;
> +
> + domain = POWER_DOMAIN_TRANSCODER(trans);
> + if (!intel_display_power_is_enabled(dev_priv, domain))
> + continue;
> +
> + intel_uncore_write(uncore, TRANS_PSR_IMR(trans), 0xffffffff);
> + intel_uncore_write(uncore, TRANS_PSR_IIR(trans), 0xffffffff);
Lines over 80 char.
> + }
> + } else {
> + intel_uncore_write(uncore, EDP_PSR_IMR, 0xffffffff);
> + intel_uncore_write(uncore, EDP_PSR_IIR, 0xffffffff);
> + }
>
> for_each_pipe(dev_priv, pipe)
> if (intel_display_power_is_enabled(dev_priv,
> @@ -3793,7 +3819,21 @@ static void gen8_de_irq_postinstall(struct drm_i915_private *dev_priv)
> else if (IS_BROADWELL(dev_priv))
> de_port_enables |= GEN8_PORT_DP_A_HOTPLUG;
>
> - gen3_assert_iir_is_zero(uncore, EDP_PSR_IIR);
> + if (INTEL_GEN(dev_priv) >= 12) {
> + enum transcoder trans;
> +
> + for (trans = TRANSCODER_A; trans <= TRANSCODER_D; trans++) {
> + enum intel_display_power_domain domain;
> +
> + domain = POWER_DOMAIN_TRANSCODER(trans);
> + if (!intel_display_power_is_enabled(dev_priv, domain))
> + continue;
> +
> + gen3_assert_iir_is_zero(uncore, TRANS_PSR_IIR(trans));
> + }
> + } else {
> + gen3_assert_iir_is_zero(uncore, EDP_PSR_IIR);
> + }
>
> for_each_pipe(dev_priv, pipe) {
> dev_priv->de_irq_mask[pipe] = ~de_pipe_masked;
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 1c6d99944630..3de02683d856 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -4222,7 +4222,7 @@ enum {
> #define EDP_PSR_TP1_TIME_0us (3 << 4)
> #define EDP_PSR_IDLE_FRAME_SHIFT 0
>
> -/* Bspec claims those aren't shifted but stay at 0x64800 */
> +/* Bspec claims those aren't shifted but stay at 0x64800 until TGL */
> #define EDP_PSR_IMR _MMIO(0x64834)
> #define EDP_PSR_IIR _MMIO(0x64838)
> #define _EDP_PSR_TRANS_SHIFT(trans) ((trans) == TRANSCODER_EDP ? \
> @@ -4232,6 +4232,14 @@ enum {
> #define EDP_PSR_POST_EXIT(trans) (0x2 << _EDP_PSR_TRANS_SHIFT(trans))
> #define EDP_PSR_PRE_ENTRY(trans) (0x1 << _EDP_PSR_TRANS_SHIFT(trans))
>
> +#define _PSR_IMR_A 0x60814
> +#define _PSR_IIR_A 0x60818
> +#define TRANS_PSR_IMR(tran) _MMIO_TRANS2(tran, _PSR_IMR_A) /* TGL+ */
> +#define TRANS_PSR_IIR(tran) _MMIO_TRANS2(tran, _PSR_IIR_A) /* TGL+ */
IMO if /* TGL+ */ comment shifted above, it will satisfy the 80 char limit.
> +#define TRANS_PSR_ERROR (1 << 2)
> +#define TRANS_PSR_POST_EXIT (1 << 1)
> +#define TRANS_PSR_PRE_ENTRY (1 << 0)
> +
> #define _SRD_AUX_CTL_A 0x60810
> #define _SRD_AUX_CTL_EDP 0x6f810
> #define EDP_PSR_AUX_CTL(tran) _MMIO(_PSR_ADJ(tran, _SRD_AUX_CTL_A))
> --
> 2.23.0
>
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