[Intel-gfx] [PATCH v4 14/18] drm/i915/xehpsdv: factor out function to read RP_STATE_CAP

Matt Roper
2021-07-29T17:00:53Z

From: Lucas De Marchi <lucas.demarchi@intel.com>

Instead of maintaining the same if ladder in 3 different places, add a
function to read RP_STATE_CAP.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
---
drivers/gpu/drm/i915/gt/debugfs_gt_pm.c | 8 +++-----
drivers/gpu/drm/i915/gt/intel_rps.c | 17 ++++++++++++-----
drivers/gpu/drm/i915/gt/intel_rps.h | 1 +
drivers/gpu/drm/i915/i915_debugfs.c | 8 +++-----
4 files changed, 19 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/debugfs_gt_pm.c b/drivers/gpu/drm/i915/gt/debugfs_gt_pm.c
index 4270b5a34a83..1061a62bdfce 100644
--- a/drivers/gpu/drm/i915/gt/debugfs_gt_pm.c
+++ b/drivers/gpu/drm/i915/gt/debugfs_gt_pm.c
@@ -309,13 +309,11 @@ static int frequency_show(struct seq_file *m, void *unused)
int max_freq;

rp_state_limits = intel_uncore_read(uncore, GEN6_RP_STATE_LIMITS);
- if (IS_GEN9_LP(i915)) {
- rp_state_cap = intel_uncore_read(uncore, BXT_RP_STATE_CAP);
+ rp_state_cap = intel_rps_read_state_cap(rps);
+ if (IS_GEN9_LP(i915))
gt_perf_status = intel_uncore_read(uncore, BXT_GT_PERF_STATUS);
- } else {
- rp_state_cap = intel_uncore_read(uncore, GEN6_RP_STATE_CAP);
+ else
gt_perf_status = intel_uncore_read(uncore, GEN6_GT_PERF_STATUS);
- }

/* RPSTAT1 is in the GT power well */
intel_uncore_forcewake_get(uncore, FORCEWAKE_ALL);
diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c
index 0c8e7f2b06f0..8b0f429ba5be 100644
--- a/drivers/gpu/drm/i915/gt/intel_rps.c
+++ b/drivers/gpu/drm/i915/gt/intel_rps.c
@@ -975,20 +975,16 @@ int intel_rps_set(struct intel_rps *rps, u8 val)
static void gen6_rps_init(struct intel_rps *rps)
{
struct drm_i915_private *i915 = rps_to_i915(rps);
- struct intel_uncore *uncore = rps_to_uncore(rps);
+ u32 rp_state_cap = intel_rps_read_state_cap(rps);

/* All of these values are in units of 50MHz */

/* static values from HW: RP0 > RP1 > RPn (min_freq) */
if (IS_GEN9_LP(i915)) {
- u32 rp_state_cap = intel_uncore_read(uncore, BXT_RP_STATE_CAP);
-
rps->rp0_freq = (rp_state_cap >> 16) & 0xff;
rps->rp1_freq = (rp_state_cap >> 8) & 0xff;
rps->min_freq = (rp_state_cap >> 0) & 0xff;
} else {
- u32 rp_state_cap = intel_uncore_read(uncore, GEN6_RP_STATE_CAP);
-
rps->rp0_freq = (rp_state_cap >> 0) & 0xff;
rps->rp1_freq = (rp_state_cap >> 8) & 0xff;
rps->min_freq = (rp_state_cap >> 16) & 0xff;
@@ -1940,6 +1936,17 @@ u32 intel_rps_read_actual_frequency(struct intel_rps *rps)
return freq;
}

+u32 intel_rps_read_state_cap(struct intel_rps *rps)
+{
+ struct drm_i915_private *i915 = rps_to_i915(rps);
+ struct intel_uncore *uncore = rps_to_uncore(rps);
+
+ if (IS_GEN9_LP(i915))
+ return intel_uncore_read(uncore, BXT_RP_STATE_CAP);
+ else
+ return intel_uncore_read(uncore, GEN6_RP_STATE_CAP);
+}
+
/* External interface for intel_ips.ko */

static struct drm_i915_private __rcu *ips_mchdev;
diff --git a/drivers/gpu/drm/i915/gt/intel_rps.h b/drivers/gpu/drm/i915/gt/intel_rps.h
index 1d2cfc98b510..6e06dd61f818 100644
--- a/drivers/gpu/drm/i915/gt/intel_rps.h
+++ b/drivers/gpu/drm/i915/gt/intel_rps.h
@@ -31,6 +31,7 @@ int intel_gpu_freq(struct intel_rps *rps, int val);
int intel_freq_opcode(struct intel_rps *rps, int val);
u32 intel_rps_get_cagf(struct intel_rps *rps, u32 rpstat1);
u32 intel_rps_read_actual_frequency(struct intel_rps *rps);
+u32 intel_rps_read_state_cap(struct intel_rps *rps);

void gen5_rps_irq_handler(struct intel_rps *rps);
void gen6_rps_irq_handler(struct intel_rps *rps, u32 pm_iir);
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 0529576f069c..37056b2c044a 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -420,13 +420,11 @@ static int i915_frequency_info(struct seq_file *m, void *unused)
int max_freq;

rp_state_limits = intel_uncore_read(&dev_priv->uncore, GEN6_RP_STATE_LIMITS);
- if (IS_GEN9_LP(dev_priv)) {
- rp_state_cap = intel_uncore_read(&dev_priv->uncore, BXT_RP_STATE_CAP);
+ rp_state_cap = intel_rps_read_state_cap(rps);
+ if (IS_GEN9_LP(dev_priv))
gt_perf_status = intel_uncore_read(&dev_priv->uncore, BXT_GT_PERF_STATUS);
- } else {
- rp_state_cap = intel_uncore_read(&dev_priv->uncore, GEN6_RP_STATE_CAP);
+ else
gt_perf_status = intel_uncore_read(&dev_priv->uncore, GEN6_GT_PERF_STATUS);
- }

/* RPSTAT1 is in the GT power well */
intel_uncore_forcewake_get(&dev_priv->uncore, FORCEWAKE_ALL);