Re: [PATCH 08/19] drm/i915: add some runtime PM get/put calls

Rodrigo Vivi
2013-11-29T13:05:52Z

I think this one and last one could be only one patch, but anyway:

Reviewed-by Rodrigo Vivi <rodrigo.vivi@gmail.com>

On Wed, Nov 27, 2013 at 06:21:54PM -0200, Paulo Zanoni wrote:
> From: Paulo Zanoni <paulo.r.zanoni@intel.com>
>
> These are needed when we cat the debugfs and sysfs files.
>
> V2: - Rebase
> V3: - Rebase
> V4: - Rebase
>
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
> ---
> drivers/gpu/drm/i915/i915_debugfs.c | 45 ++++++++++++++++++++++++++++++++++---
> drivers/gpu/drm/i915/i915_sysfs.c | 14 ++++++++++--
> drivers/gpu/drm/i915/intel_dp.c | 11 +++++++--
> drivers/gpu/drm/i915/intel_panel.c | 3 +++
> drivers/gpu/drm/i915/intel_uncore.c | 4 ++++
> 5 files changed, 70 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> index 13accf7..6badc15 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -564,10 +564,12 @@ static int i915_gem_seqno_info(struct seq_file *m, void *data)
> ret = mutex_lock_interruptible(&dev->struct_mutex);
> if (ret)
> return ret;
> + intel_runtime_pm_get(dev_priv);
>
> for_each_ring(ring, dev_priv, i)
> i915_ring_seqno_info(m, ring);
>
> + intel_runtime_pm_put(dev_priv);
> mutex_unlock(&dev->struct_mutex);
>
> return 0;
> @@ -585,6 +587,7 @@ static int i915_interrupt_info(struct seq_file *m, void *data)
> ret = mutex_lock_interruptible(&dev->struct_mutex);
> if (ret)
> return ret;
> + intel_runtime_pm_get(dev_priv);
>
> if (INTEL_INFO(dev)->gen >= 8) {
> int i;
> @@ -711,6 +714,7 @@ static int i915_interrupt_info(struct seq_file *m, void *data)
> }
> i915_ring_seqno_info(m, ring);
> }
> + intel_runtime_pm_put(dev_priv);
> mutex_unlock(&dev->struct_mutex);
>
> return 0;
> @@ -904,9 +908,11 @@ static int i915_rstdby_delays(struct seq_file *m, void *unused)
> ret = mutex_lock_interruptible(&dev->struct_mutex);
> if (ret)
> return ret;
> + intel_runtime_pm_get(dev_priv);
>
> crstanddelay = I915_READ16(CRSTANDVID);
>
> + intel_runtime_pm_put(dev_priv);
> mutex_unlock(&dev->struct_mutex);
>
> seq_printf(m, "w/ctx: %d, w/o ctx: %d\n", (crstanddelay >> 8) & 0x3f, (crstanddelay & 0x3f));
> @@ -919,7 +925,9 @@ static int i915_cur_delayinfo(struct seq_file *m, void *unused)
> struct drm_info_node *node = (struct drm_info_node *) m->private;
> struct drm_device *dev = node->minor->dev;
> drm_i915_private_t *dev_priv = dev->dev_private;
> - int ret;
> + int ret = 0;
> +
> + intel_runtime_pm_get(dev_priv);
>
> flush_delayed_work(&dev_priv->rps.delayed_resume_work);
>
> @@ -945,7 +953,7 @@ static int i915_cur_delayinfo(struct seq_file *m, void *unused)
> /* RPSTAT1 is in the GT power well */
> ret = mutex_lock_interruptible(&dev->struct_mutex);
> if (ret)
> - return ret;
> + goto out;
>
> gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
>
> @@ -1033,7 +1041,9 @@ static int i915_cur_delayinfo(struct seq_file *m, void *unused)
> seq_puts(m, "no P-state info available\n");
> }
>
> - return 0;
> +out:
> + intel_runtime_pm_put(dev_priv);
> + return ret;
> }
>
> static int i915_delayfreq_table(struct seq_file *m, void *unused)
> @@ -1047,6 +1057,7 @@ static int i915_delayfreq_table(struct seq_file *m, void *unused)
> ret = mutex_lock_interruptible(&dev->struct_mutex);
> if (ret)
> return ret;
> + intel_runtime_pm_get(dev_priv);
>
> for (i = 0; i < 16; i++) {
> delayfreq = I915_READ(PXVFREQ_BASE + i * 4);
> @@ -1054,6 +1065,8 @@ static int i915_delayfreq_table(struct seq_file *m, void *unused)
> (delayfreq & PXVFREQ_PX_MASK) >> PXVFREQ_PX_SHIFT);
> }
>
> + intel_runtime_pm_put(dev_priv);
> +
> mutex_unlock(&dev->struct_mutex);
>
> return 0;
> @@ -1075,12 +1088,14 @@ static int i915_inttoext_table(struct seq_file *m, void *unused)
> ret = mutex_lock_interruptible(&dev->struct_mutex);
> if (ret)
> return ret;
> + intel_runtime_pm_get(dev_priv);
>
> for (i = 1; i <= 32; i++) {
> inttoext = I915_READ(INTTOEXT_BASE_ILK + i * 4);
> seq_printf(m, "INTTOEXT%02d: 0x%08x\n", i, inttoext);
> }
>
> + intel_runtime_pm_put(dev_priv);
> mutex_unlock(&dev->struct_mutex);
>
> return 0;
> @@ -1098,11 +1113,13 @@ static int ironlake_drpc_info(struct seq_file *m)
> ret = mutex_lock_interruptible(&dev->struct_mutex);
> if (ret)
> return ret;
> + intel_runtime_pm_get(dev_priv);
>
> rgvmodectl = I915_READ(MEMMODECTL);
> rstdbyctl = I915_READ(RSTDBYCTL);
> crstandvid = I915_READ16(CRSTANDVID);
>
> + intel_runtime_pm_put(dev_priv);
> mutex_unlock(&dev->struct_mutex);
>
> seq_printf(m, "HD boost: %s\n", (rgvmodectl & MEMMODE_BOOST_EN) ?
> @@ -1166,6 +1183,7 @@ static int gen6_drpc_info(struct seq_file *m)
> ret = mutex_lock_interruptible(&dev->struct_mutex);
> if (ret)
> return ret;
> + intel_runtime_pm_get(dev_priv);
>
> spin_lock_irq(&dev_priv->uncore.lock);
> forcewake_count = dev_priv->uncore.forcewake_count;
> @@ -1191,6 +1209,8 @@ static int gen6_drpc_info(struct seq_file *m)
> sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids);
> mutex_unlock(&dev_priv->rps.hw_lock);
>
> + intel_runtime_pm_put(dev_priv);
> +
> seq_printf(m, "Video Turbo Mode: %s\n",
> yesno(rpmodectl1 & GEN6_RP_MEDIA_TURBO));
> seq_printf(m, "HW control enabled: %s\n",
> @@ -1405,6 +1425,7 @@ static int i915_ring_freq_table(struct seq_file *m, void *unused)
> ret = mutex_lock_interruptible(&dev_priv->rps.hw_lock);
> if (ret)
> return ret;
> + intel_runtime_pm_get(dev_priv);
>
> seq_puts(m, "GPU freq (MHz)\tEffective CPU freq (MHz)\tEffective Ring freq (MHz)\n");
>
> @@ -1421,6 +1442,7 @@ static int i915_ring_freq_table(struct seq_file *m, void *unused)
> ((ia_freq >> 8) & 0xff) * 100);
> }
>
> + intel_runtime_pm_put(dev_priv);
> mutex_unlock(&dev_priv->rps.hw_lock);
>
> return 0;
> @@ -1436,8 +1458,10 @@ static int i915_gfxec(struct seq_file *m, void *unused)
> ret = mutex_lock_interruptible(&dev->struct_mutex);
> if (ret)
> return ret;
> + intel_runtime_pm_get(dev_priv);
>
> seq_printf(m, "GFXEC: %ld\n", (unsigned long)I915_READ(0x112f4));
> + intel_runtime_pm_put(dev_priv);
>
> mutex_unlock(&dev->struct_mutex);
>
> @@ -1617,6 +1641,7 @@ static int i915_swizzle_info(struct seq_file *m, void *data)
> ret = mutex_lock_interruptible(&dev->struct_mutex);
> if (ret)
> return ret;
> + intel_runtime_pm_get(dev_priv);
>
> seq_printf(m, "bit6 swizzle for X-tiling = %s\n",
> swizzle_string(dev_priv->mm.bit_6_swizzle_x));
> @@ -1648,6 +1673,7 @@ static int i915_swizzle_info(struct seq_file *m, void *data)
> seq_printf(m, "DISP_ARB_CTL = 0x%08x\n",
> I915_READ(DISP_ARB_CTL));
> }
> + intel_runtime_pm_put(dev_priv);
> mutex_unlock(&dev->struct_mutex);
>
> return 0;
> @@ -1708,16 +1734,19 @@ static int i915_ppgtt_info(struct seq_file *m, void *data)
> {
> struct drm_info_node *node = (struct drm_info_node *) m->private;
> struct drm_device *dev = node->minor->dev;
> + struct drm_i915_private *dev_priv = dev->dev_private;
>
> int ret = mutex_lock_interruptible(&dev->struct_mutex);
> if (ret)
> return ret;
> + intel_runtime_pm_get(dev_priv);
>
> if (INTEL_INFO(dev)->gen >= 8)
> gen8_ppgtt_info(m, dev);
> else if (INTEL_INFO(dev)->gen >= 6)
> gen6_ppgtt_info(m, dev);
>
> + intel_runtime_pm_put(dev_priv);
> mutex_unlock(&dev->struct_mutex);
>
> return 0;
> @@ -1791,6 +1820,8 @@ static int i915_edp_psr_status(struct seq_file *m, void *data)
> u32 psrperf = 0;
> bool enabled = false;
>
> + intel_runtime_pm_get(dev_priv);
> +
> seq_printf(m, "Sink_Support: %s\n", yesno(dev_priv->psr.sink_support));
> seq_printf(m, "Source_OK: %s\n", yesno(dev_priv->psr.source_ok));
>
> @@ -1803,6 +1834,7 @@ static int i915_edp_psr_status(struct seq_file *m, void *data)
> EDP_PSR_PERF_CNT_MASK;
> seq_printf(m, "Performance_Counter: %u\n", psrperf);
>
> + intel_runtime_pm_put(dev_priv);
> return 0;
> }
>
> @@ -3016,8 +3048,11 @@ i915_cache_sharing_get(void *data, u64 *val)
> ret = mutex_lock_interruptible(&dev->struct_mutex);
> if (ret)
> return ret;
> + intel_runtime_pm_get(dev_priv);
>
> snpcr = I915_READ(GEN6_MBCUNIT_SNPCR);
> +
> + intel_runtime_pm_put(dev_priv);
> mutex_unlock(&dev_priv->dev->struct_mutex);
>
> *val = (snpcr & GEN6_MBC_SNPCR_MASK) >> GEN6_MBC_SNPCR_SHIFT;
> @@ -3038,6 +3073,7 @@ i915_cache_sharing_set(void *data, u64 val)
> if (val > 3)
> return -EINVAL;
>
> + intel_runtime_pm_get(dev_priv);
> DRM_DEBUG_DRIVER("Manually setting uncore sharing to %llu\n", val);
>
> /* Update the cache sharing policy here as well */
> @@ -3046,6 +3082,7 @@ i915_cache_sharing_set(void *data, u64 val)
> snpcr |= (val << GEN6_MBC_SNPCR_SHIFT);
> I915_WRITE(GEN6_MBCUNIT_SNPCR, snpcr);
>
> + intel_runtime_pm_put(dev_priv);
> return 0;
> }
>
> @@ -3061,6 +3098,7 @@ static int i915_forcewake_open(struct inode *inode, struct file *file)
> if (INTEL_INFO(dev)->gen < 6)
> return 0;
>
> + intel_runtime_pm_get(dev_priv);
> gen6_gt_force_wake_get(dev_priv, FORCEWAKE_ALL);
>
> return 0;
> @@ -3075,6 +3113,7 @@ static int i915_forcewake_release(struct inode *inode, struct file *file)
> return 0;
>
> gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL);
> + intel_runtime_pm_put(dev_priv);
>
> return 0;
> }
> diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
> index 05d8b16..33bcae3 100644
> --- a/drivers/gpu/drm/i915/i915_sysfs.c
> +++ b/drivers/gpu/drm/i915/i915_sysfs.c
> @@ -40,10 +40,13 @@ static u32 calc_residency(struct drm_device *dev, const u32 reg)
> struct drm_i915_private *dev_priv = dev->dev_private;
> u64 raw_time; /* 32b value may overflow during fixed point math */
> u64 units = 128ULL, div = 100000ULL, bias = 100ULL;
> + u32 ret;
>
> if (!intel_enable_rc6(dev))
> return 0;
>
> + intel_runtime_pm_get(dev_priv);
> +
> /* On VLV, residency time is in CZ units rather than 1.28us */
> if (IS_VALLEYVIEW(dev)) {
> u32 clkctl2;
> @@ -52,7 +55,8 @@ static u32 calc_residency(struct drm_device *dev, const u32 reg)
> CLK_CTL2_CZCOUNT_30NS_SHIFT;
> if (!clkctl2) {
> WARN(!clkctl2, "bogus CZ count value");
> - return 0;
> + ret = 0;
> + goto out;
> }
> units = DIV_ROUND_UP_ULL(30ULL * bias, (u64)clkctl2);
> if (I915_READ(VLV_COUNTER_CONTROL) & VLV_COUNT_RANGE_HIGH)
> @@ -62,7 +66,11 @@ static u32 calc_residency(struct drm_device *dev, const u32 reg)
> }
>
> raw_time = I915_READ(reg) * units;
> - return DIV_ROUND_UP_ULL(raw_time, div);
> + ret = DIV_ROUND_UP_ULL(raw_time, div);
> +
> +out:
> + intel_runtime_pm_put(dev_priv);
> + return ret;
> }
>
> static ssize_t
> @@ -448,7 +456,9 @@ static ssize_t gt_rp_mhz_show(struct device *kdev, struct device_attribute *attr
> ret = mutex_lock_interruptible(&dev->struct_mutex);
> if (ret)
> return ret;
> + intel_runtime_pm_get(dev_priv);
> rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
> + intel_runtime_pm_put(dev_priv);
> mutex_unlock(&dev->struct_mutex);
>
> if (attr == &dev_attr_gt_RP0_freq_mhz) {
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 1e372d5..28fc070 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -3082,9 +3082,12 @@ intel_dp_detect(struct drm_connector *connector, bool force)
> struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
> struct intel_encoder *intel_encoder = &intel_dig_port->base;
> struct drm_device *dev = connector->dev;
> + struct drm_i915_private *dev_priv = dev->dev_private;
> enum drm_connector_status status;
> struct edid *edid = NULL;
>
> + intel_runtime_pm_get(dev_priv);
> +
> DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
> connector->base.id, drm_get_connector_name(connector));
>
> @@ -3096,7 +3099,7 @@ intel_dp_detect(struct drm_connector *connector, bool force)
> status = g4x_dp_detect(intel_dp);
>
> if (status != connector_status_connected)
> - return status;
> + goto out;
>
> intel_dp_probe_oui(intel_dp);
>
> @@ -3112,7 +3115,11 @@ intel_dp_detect(struct drm_connector *connector, bool force)
>
> if (intel_encoder->type != INTEL_OUTPUT_EDP)
> intel_encoder->type = INTEL_OUTPUT_DISPLAYPORT;
> - return connector_status_connected;
> + status = connector_status_connected;
> +
> +out:
> + intel_runtime_pm_put(dev_priv);
> + return status;
> }
>
> static int intel_dp_get_modes(struct drm_connector *connector)
> diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
> index e480cf4..4b7925b 100644
> --- a/drivers/gpu/drm/i915/intel_panel.c
> +++ b/drivers/gpu/drm/i915/intel_panel.c
> @@ -845,11 +845,14 @@ static int intel_backlight_device_get_brightness(struct backlight_device *bd)
> {
> struct intel_connector *connector = bl_get_data(bd);
> struct drm_device *dev = connector->base.dev;
> + struct drm_i915_private *dev_priv = dev->dev_private;
> int ret;
>
> + intel_runtime_pm_get(dev_priv);
> mutex_lock(&dev->mode_config.mutex);
> ret = intel_panel_get_backlight(connector);
> mutex_unlock(&dev->mode_config.mutex);
> + intel_runtime_pm_put(dev_priv);
>
> return ret;
> }
> diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
> index 00e5ced..2d745a6 100644
> --- a/drivers/gpu/drm/i915/intel_uncore.c
> +++ b/drivers/gpu/drm/i915/intel_uncore.c
> @@ -366,6 +366,8 @@ void gen6_gt_force_wake_get(struct drm_i915_private *dev_priv, int fw_engine)
> if (!dev_priv->uncore.funcs.force_wake_get)
> return;
>
> + intel_runtime_pm_get(dev_priv);
> +
> /* Redirect to VLV specific routine */
> if (IS_VALLEYVIEW(dev_priv->dev))
> return vlv_force_wake_get(dev_priv, fw_engine);
> @@ -399,6 +401,8 @@ void gen6_gt_force_wake_put(struct drm_i915_private *dev_priv, int fw_engine)
> 1);
> }
> spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
> +
> + intel_runtime_pm_put(dev_priv);
> }
>
> /* We give fast paths for the really cool registers */
> --
> 1.8.3.1
>
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