From 14f25bd0bb938af7359433db4ef9495aad4cf703 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Tue, 31 Jan 2023 02:21:27 +0200 Subject: [PATCH] drm/i915: Expose SAGV state via debugfs MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Since SAGV is controlled via unidirectional pcode commands we have no way to query the current state. So instead let's expose the last programmed state via debugfs. This way we can at least know whether SAGV should be enabled or not (which can be important to know when dealing with underruns/etc.). Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20230131002127.29305-4-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula --- .../drm/i915/display/intel_display_debugfs.c | 2 +- drivers/gpu/drm/i915/display/skl_watermark.c | 31 ++++++++++++++++--- drivers/gpu/drm/i915/display/skl_watermark.h | 2 +- 3 files changed, 28 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c index 7bcd90384a46d..9e2fb8626c96c 100644 --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c @@ -1622,7 +1622,7 @@ void intel_display_debugfs_register(struct drm_i915_private *i915) intel_dmc_debugfs_register(i915); intel_fbc_debugfs_register(i915); intel_hpd_debugfs_register(i915); - skl_watermark_ipc_debugfs_register(i915); + skl_watermark_debugfs_register(i915); } static int i915_panel_show(struct seq_file *m, void *data) diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c index 5916694f147cc..022aed8dd4400 100644 --- a/drivers/gpu/drm/i915/display/skl_watermark.c +++ b/drivers/gpu/drm/i915/display/skl_watermark.c @@ -3545,13 +3545,34 @@ static const struct file_operations skl_watermark_ipc_status_fops = { .write = skl_watermark_ipc_status_write }; -void skl_watermark_ipc_debugfs_register(struct drm_i915_private *i915) +static int intel_sagv_status_show(struct seq_file *m, void *unused) +{ + struct drm_i915_private *i915 = m->private; + static const char * const sagv_status[] = { + [I915_SAGV_UNKNOWN] = "unknown", + [I915_SAGV_DISABLED] = "disabled", + [I915_SAGV_ENABLED] = "enabled", + [I915_SAGV_NOT_CONTROLLED] = "not controlled", + }; + + seq_printf(m, "SAGV available: %s\n", str_yes_no(intel_has_sagv(i915))); + seq_printf(m, "SAGV status: %s\n", sagv_status[i915->display.sagv.status]); + seq_printf(m, "SAGV block time: %d usec\n", i915->display.sagv.block_time_us); + + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(intel_sagv_status); + +void skl_watermark_debugfs_register(struct drm_i915_private *i915) { struct drm_minor *minor = i915->drm.primary; - if (!HAS_IPC(i915)) - return; + if (HAS_IPC(i915)) + debugfs_create_file("i915_ipc_status", 0644, minor->debugfs_root, i915, + &skl_watermark_ipc_status_fops); - debugfs_create_file("i915_ipc_status", 0644, minor->debugfs_root, i915, - &skl_watermark_ipc_status_fops); + if (HAS_SAGV(i915)) + debugfs_create_file("i915_sagv_status", 0444, minor->debugfs_root, i915, + &intel_sagv_status_fops); } diff --git a/drivers/gpu/drm/i915/display/skl_watermark.h b/drivers/gpu/drm/i915/display/skl_watermark.h index 37954c472070b..1f81e1a5a4a3c 100644 --- a/drivers/gpu/drm/i915/display/skl_watermark.h +++ b/drivers/gpu/drm/i915/display/skl_watermark.h @@ -47,7 +47,7 @@ void intel_wm_state_verify(struct intel_crtc *crtc, void skl_watermark_ipc_init(struct drm_i915_private *i915); void skl_watermark_ipc_update(struct drm_i915_private *i915); bool skl_watermark_ipc_enabled(struct drm_i915_private *i915); -void skl_watermark_ipc_debugfs_register(struct drm_i915_private *i915); +void skl_watermark_debugfs_register(struct drm_i915_private *i915); void skl_wm_init(struct drm_i915_private *i915); -- 2.30.2