drm/i915: deduplicate frequency dump on debugfs

Although commit 9dd4b065446a ("drm/i915/gt: Move pm debug files into a
gt aware debugfs") says it was moving debug files to gt/, the
i915_frequency_info file was left behind and its implementation copied
into drivers/gpu/drm/i915/gt/debugfs_gt_pm.c. Over time we had several
patches having to change both places to keep them in sync (and some
patches failing to do so). The initial idea was to remove
i915_frequency_info, but there are user space tools using it. From a
quick code search there are other scripts and test tools besides igt, so
it's not simply updating igt to get rid of the older file.

Here we export a function using drm_printer as parameter and make
both show() implementations to call this same function. Aside from a few
variable name differences, for i915_frequency_info this brings a few
lines that were not previously printed: RP UP EI, RP UP THRESHOLD, RP
DOWN THRESHOLD and RP DOWN EI.  These came in as part of
commit 9c878557b1eb ("drm/i915/gt: Use the RPM config register to
determine clk frequencies"), which didn't change both places.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210918025754.1254705-4-lucas.demarchi@intel.com

1 files changed, 67 insertions, 60 deletions

diff --git a/drivers/gpu/drm/i915/gt/intel_gt_pm_debugfs.c b/drivers/gpu/drm/i915/gt/intel_gt_pm_debugfs.c
index 250467108eda..5f84ad602642 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_pm_debugfs.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_pm_debugfs.c
@@ -240,9 +240,8 @@ static int drpc_show(struct seq_file *m, void *unused)
 }
 DEFINE_INTEL_GT_DEBUGFS_ATTRIBUTE(drpc);
 
-static int frequency_show(struct seq_file *m, void *unused)
+void intel_gt_pm_frequency_dump(struct intel_gt *gt, struct drm_printer *p)
 {
-	struct intel_gt *gt = m->private;
 	struct drm_i915_private *i915 = gt->i915;
 	struct intel_uncore *uncore = gt->uncore;
 	struct intel_rps *rps = &gt->rps;
@@ -254,21 +253,21 @@ static int frequency_show(struct seq_file *m, void *unused)
 		u16 rgvswctl = intel_uncore_read16(uncore, MEMSWCTL);
 		u16 rgvstat = intel_uncore_read16(uncore, MEMSTAT_ILK);
 
-		seq_printf(m, "Requested P-state: %d\n", (rgvswctl >> 8) & 0xf);
-		seq_printf(m, "Requested VID: %d\n", rgvswctl & 0x3f);
-		seq_printf(m, "Current VID: %d\n", (rgvstat & MEMSTAT_VID_MASK) >>
+		drm_printf(p, "Requested P-state: %d\n", (rgvswctl >> 8) & 0xf);
+		drm_printf(p, "Requested VID: %d\n", rgvswctl & 0x3f);
+		drm_printf(p, "Current VID: %d\n", (rgvstat & MEMSTAT_VID_MASK) >>
 			   MEMSTAT_VID_SHIFT);
-		seq_printf(m, "Current P-state: %d\n",
+		drm_printf(p, "Current P-state: %d\n",
 			   (rgvstat & MEMSTAT_PSTATE_MASK) >> MEMSTAT_PSTATE_SHIFT);
 	} else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) {
 		u32 rpmodectl, freq_sts;
 
 		rpmodectl = intel_uncore_read(uncore, GEN6_RP_CONTROL);
-		seq_printf(m, "Video Turbo Mode: %s\n",
+		drm_printf(p, "Video Turbo Mode: %s\n",
 			   yesno(rpmodectl & GEN6_RP_MEDIA_TURBO));
-		seq_printf(m, "HW control enabled: %s\n",
+		drm_printf(p, "HW control enabled: %s\n",
 			   yesno(rpmodectl & GEN6_RP_ENABLE));
-		seq_printf(m, "SW control enabled: %s\n",
+		drm_printf(p, "SW control enabled: %s\n",
 			   yesno((rpmodectl & GEN6_RP_MEDIA_MODE_MASK) ==
 				 GEN6_RP_MEDIA_SW_MODE));
 
@@ -276,25 +275,25 @@ static int frequency_show(struct seq_file *m, void *unused)
 		freq_sts = vlv_punit_read(i915, PUNIT_REG_GPU_FREQ_STS);
 		vlv_punit_put(i915);
 
-		seq_printf(m, "PUNIT_REG_GPU_FREQ_STS: 0x%08x\n", freq_sts);
-		seq_printf(m, "DDR freq: %d MHz\n", i915->mem_freq);
+		drm_printf(p, "PUNIT_REG_GPU_FREQ_STS: 0x%08x\n", freq_sts);
+		drm_printf(p, "DDR freq: %d MHz\n", i915->mem_freq);
 
-		seq_printf(m, "actual GPU freq: %d MHz\n",
+		drm_printf(p, "actual GPU freq: %d MHz\n",
 			   intel_gpu_freq(rps, (freq_sts >> 8) & 0xff));
 
-		seq_printf(m, "current GPU freq: %d MHz\n",
+		drm_printf(p, "current GPU freq: %d MHz\n",
 			   intel_gpu_freq(rps, rps->cur_freq));
 
-		seq_printf(m, "max GPU freq: %d MHz\n",
+		drm_printf(p, "max GPU freq: %d MHz\n",
 			   intel_gpu_freq(rps, rps->max_freq));
 
-		seq_printf(m, "min GPU freq: %d MHz\n",
+		drm_printf(p, "min GPU freq: %d MHz\n",
 			   intel_gpu_freq(rps, rps->min_freq));
 
-		seq_printf(m, "idle GPU freq: %d MHz\n",
+		drm_printf(p, "idle GPU freq: %d MHz\n",
 			   intel_gpu_freq(rps, rps->idle_freq));
 
-		seq_printf(m, "efficient (RPe) frequency: %d MHz\n",
+		drm_printf(p, "efficient (RPe) frequency: %d MHz\n",
 			   intel_gpu_freq(rps, rps->efficient_freq));
 	} else if (GRAPHICS_VER(i915) >= 6) {
 		u32 rp_state_limits;
@@ -374,109 +373,117 @@ static int frequency_show(struct seq_file *m, void *unused)
 		}
 		pm_mask = intel_uncore_read(uncore, GEN6_PMINTRMSK);
 
-		seq_printf(m, "Video Turbo Mode: %s\n",
+		drm_printf(p, "Video Turbo Mode: %s\n",
 			   yesno(rpmodectl & GEN6_RP_MEDIA_TURBO));
-		seq_printf(m, "HW control enabled: %s\n",
+		drm_printf(p, "HW control enabled: %s\n",
 			   yesno(rpmodectl & GEN6_RP_ENABLE));
-		seq_printf(m, "SW control enabled: %s\n",
+		drm_printf(p, "SW control enabled: %s\n",
 			   yesno((rpmodectl & GEN6_RP_MEDIA_MODE_MASK) ==
 				 GEN6_RP_MEDIA_SW_MODE));
 
-		seq_printf(m, "PM IER=0x%08x IMR=0x%08x, MASK=0x%08x\n",
+		drm_printf(p, "PM IER=0x%08x IMR=0x%08x, MASK=0x%08x\n",
 			   pm_ier, pm_imr, pm_mask);
 		if (GRAPHICS_VER(i915) <= 10)
-			seq_printf(m, "PM ISR=0x%08x IIR=0x%08x\n",
+			drm_printf(p, "PM ISR=0x%08x IIR=0x%08x\n",
 				   pm_isr, pm_iir);
-		seq_printf(m, "pm_intrmsk_mbz: 0x%08x\n",
+		drm_printf(p, "pm_intrmsk_mbz: 0x%08x\n",
 			   rps->pm_intrmsk_mbz);
-		seq_printf(m, "GT_PERF_STATUS: 0x%08x\n", gt_perf_status);
-		seq_printf(m, "Render p-state ratio: %d\n",
+		drm_printf(p, "GT_PERF_STATUS: 0x%08x\n", gt_perf_status);
+		drm_printf(p, "Render p-state ratio: %d\n",
 			   (gt_perf_status & (GRAPHICS_VER(i915) >= 9 ? 0x1ff00 : 0xff00)) >> 8);
-		seq_printf(m, "Render p-state VID: %d\n",
+		drm_printf(p, "Render p-state VID: %d\n",
 			   gt_perf_status & 0xff);
-		seq_printf(m, "Render p-state limit: %d\n",
+		drm_printf(p, "Render p-state limit: %d\n",
 			   rp_state_limits & 0xff);
-		seq_printf(m, "RPSTAT1: 0x%08x\n", rpstat);
-		seq_printf(m, "RPMODECTL: 0x%08x\n", rpmodectl);
-		seq_printf(m, "RPINCLIMIT: 0x%08x\n", rpinclimit);
-		seq_printf(m, "RPDECLIMIT: 0x%08x\n", rpdeclimit);
-		seq_printf(m, "RPNSWREQ: %dMHz\n", reqf);
-		seq_printf(m, "CAGF: %dMHz\n", cagf);
-		seq_printf(m, "RP CUR UP EI: %d (%lldns)\n",
+		drm_printf(p, "RPSTAT1: 0x%08x\n", rpstat);
+		drm_printf(p, "RPMODECTL: 0x%08x\n", rpmodectl);
+		drm_printf(p, "RPINCLIMIT: 0x%08x\n", rpinclimit);
+		drm_printf(p, "RPDECLIMIT: 0x%08x\n", rpdeclimit);
+		drm_printf(p, "RPNSWREQ: %dMHz\n", reqf);
+		drm_printf(p, "CAGF: %dMHz\n", cagf);
+		drm_printf(p, "RP CUR UP EI: %d (%lldns)\n",
 			   rpcurupei,
 			   intel_gt_pm_interval_to_ns(gt, rpcurupei));
-		seq_printf(m, "RP CUR UP: %d (%lldns)\n",
+		drm_printf(p, "RP CUR UP: %d (%lldns)\n",
 			   rpcurup, intel_gt_pm_interval_to_ns(gt, rpcurup));
-		seq_printf(m, "RP PREV UP: %d (%lldns)\n",
+		drm_printf(p, "RP PREV UP: %d (%lldns)\n",
 			   rpprevup, intel_gt_pm_interval_to_ns(gt, rpprevup));
-		seq_printf(m, "Up threshold: %d%%\n",
+		drm_printf(p, "Up threshold: %d%%\n",
 			   rps->power.up_threshold);
-		seq_printf(m, "RP UP EI: %d (%lldns)\n",
+		drm_printf(p, "RP UP EI: %d (%lldns)\n",
 			   rpupei, intel_gt_pm_interval_to_ns(gt, rpupei));
-		seq_printf(m, "RP UP THRESHOLD: %d (%lldns)\n",
+		drm_printf(p, "RP UP THRESHOLD: %d (%lldns)\n",
 			   rpupt, intel_gt_pm_interval_to_ns(gt, rpupt));
 
-		seq_printf(m, "RP CUR DOWN EI: %d (%lldns)\n",
+		drm_printf(p, "RP CUR DOWN EI: %d (%lldns)\n",
 			   rpcurdownei,
 			   intel_gt_pm_interval_to_ns(gt, rpcurdownei));
-		seq_printf(m, "RP CUR DOWN: %d (%lldns)\n",
+		drm_printf(p, "RP CUR DOWN: %d (%lldns)\n",
 			   rpcurdown,
 			   intel_gt_pm_interval_to_ns(gt, rpcurdown));
-		seq_printf(m, "RP PREV DOWN: %d (%lldns)\n",
+		drm_printf(p, "RP PREV DOWN: %d (%lldns)\n",
 			   rpprevdown,
 			   intel_gt_pm_interval_to_ns(gt, rpprevdown));
-		seq_printf(m, "Down threshold: %d%%\n",
+		drm_printf(p, "Down threshold: %d%%\n",
 			   rps->power.down_threshold);
-		seq_printf(m, "RP DOWN EI: %d (%lldns)\n",
+		drm_printf(p, "RP DOWN EI: %d (%lldns)\n",
 			   rpdownei, intel_gt_pm_interval_to_ns(gt, rpdownei));
-		seq_printf(m, "RP DOWN THRESHOLD: %d (%lldns)\n",
+		drm_printf(p, "RP DOWN THRESHOLD: %d (%lldns)\n",
 			   rpdownt, intel_gt_pm_interval_to_ns(gt, rpdownt));
 
 		max_freq = (IS_GEN9_LP(i915) ? rp_state_cap >> 0 :
 			    rp_state_cap >> 16) & 0xff;
 		max_freq *= (IS_GEN9_BC(i915) ||
 			     GRAPHICS_VER(i915) >= 11 ? GEN9_FREQ_SCALER : 1);
-		seq_printf(m, "Lowest (RPN) frequency: %dMHz\n",
+		drm_printf(p, "Lowest (RPN) frequency: %dMHz\n",
 			   intel_gpu_freq(rps, max_freq));
 
 		max_freq = (rp_state_cap & 0xff00) >> 8;
 		max_freq *= (IS_GEN9_BC(i915) ||
 			     GRAPHICS_VER(i915) >= 11 ? GEN9_FREQ_SCALER : 1);
-		seq_printf(m, "Nominal (RP1) frequency: %dMHz\n",
+		drm_printf(p, "Nominal (RP1) frequency: %dMHz\n",
 			   intel_gpu_freq(rps, max_freq));
 
 		max_freq = (IS_GEN9_LP(i915) ? rp_state_cap >> 16 :
 			    rp_state_cap >> 0) & 0xff;
 		max_freq *= (IS_GEN9_BC(i915) ||
 			     GRAPHICS_VER(i915) >= 11 ? GEN9_FREQ_SCALER : 1);
-		seq_printf(m, "Max non-overclocked (RP0) frequency: %dMHz\n",
+		drm_printf(p, "Max non-overclocked (RP0) frequency: %dMHz\n",
 			   intel_gpu_freq(rps, max_freq));
-		seq_printf(m, "Max overclocked frequency: %dMHz\n",
+		drm_printf(p, "Max overclocked frequency: %dMHz\n",
 			   intel_gpu_freq(rps, rps->max_freq));
 
-		seq_printf(m, "Current freq: %d MHz\n",
+		drm_printf(p, "Current freq: %d MHz\n",
 			   intel_gpu_freq(rps, rps->cur_freq));
-		seq_printf(m, "Actual freq: %d MHz\n", cagf);
-		seq_printf(m, "Idle freq: %d MHz\n",
+		drm_printf(p, "Actual freq: %d MHz\n", cagf);
+		drm_printf(p, "Idle freq: %d MHz\n",
 			   intel_gpu_freq(rps, rps->idle_freq));
-		seq_printf(m, "Min freq: %d MHz\n",
+		drm_printf(p, "Min freq: %d MHz\n",
 			   intel_gpu_freq(rps, rps->min_freq));
-		seq_printf(m, "Boost freq: %d MHz\n",
+		drm_printf(p, "Boost freq: %d MHz\n",
 			   intel_gpu_freq(rps, rps->boost_freq));
-		seq_printf(m, "Max freq: %d MHz\n",
+		drm_printf(p, "Max freq: %d MHz\n",
 			   intel_gpu_freq(rps, rps->max_freq));
-		seq_printf(m,
+		drm_printf(p,
 			   "efficient (RPe) frequency: %d MHz\n",
 			   intel_gpu_freq(rps, rps->efficient_freq));
 	} else {
-		seq_puts(m, "no P-state info available\n");
+		drm_puts(p, "no P-state info available\n");
 	}
 
-	seq_printf(m, "Current CD clock frequency: %d kHz\n", i915->cdclk.hw.cdclk);
-	seq_printf(m, "Max CD clock frequency: %d kHz\n", i915->max_cdclk_freq);
-	seq_printf(m, "Max pixel clock frequency: %d kHz\n", i915->max_dotclk_freq);
+	drm_printf(p, "Current CD clock frequency: %d kHz\n", i915->cdclk.hw.cdclk);
+	drm_printf(p, "Max CD clock frequency: %d kHz\n", i915->max_cdclk_freq);
+	drm_printf(p, "Max pixel clock frequency: %d kHz\n", i915->max_dotclk_freq);
 
 	intel_runtime_pm_put(uncore->rpm, wakeref);
+}
+
+static int frequency_show(struct seq_file *m, void *unused)
+{
+	struct intel_gt *gt = m->private;
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	intel_gt_pm_frequency_dump(gt, &p);
 
 	return 0;
 }