From: Dibin Moolakadan Subrahmanian <dibin.moolakadan.subrahmanian@intel.com>
To: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org
Cc: animesh.manna@intel.com, uma.shankar@intel.com,
suresh.kumar.kurmi@intel.com
Subject: [PATCH v2 05/13] drm/i915/display: Add DC3CO support check and validate target DC state
Date: Wed, 22 Apr 2026 21:56:13 +0530 [thread overview]
Message-ID: <20260422162622.1869831-6-dibin.moolakadan.subrahmanian@intel.com> (raw)
In-Reply-To: <20260422162622.1869831-1-dibin.moolakadan.subrahmanian@intel.com>
Validate the requested target DC state against allowed_dc_mask in
intel_display_power_set_target_dc_state() to avoid programming
unsupported DC states.
Also add intel_display_power_dc3co_supported() helper to query DC3CO
support from allowed_dc_mask.
Changes in v2:
- Squash "Add helper to check DC3CO support" patch into this patch
Signed-off-by: Dibin Moolakadan Subrahmanian <dibin.moolakadan.subrahmanian@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
drivers/gpu/drm/i915/display/intel_display_power.c | 14 ++++++++++++++
drivers/gpu/drm/i915/display/intel_display_power.h | 1 +
2 files changed, 15 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 77c32492caa1..f626803bbd88 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -302,6 +302,13 @@ void intel_display_power_set_target_dc_state(struct intel_display *display,
struct i915_power_domains *power_domains = &display->power.domains;
mutex_lock(&power_domains->lock);
+
+ if ((state & power_domains->allowed_dc_mask) != state) {
+ drm_dbg_kms(display->drm,
+ "Rejecting DC state 0x%x (allowed mask 0x%x)\n",
+ state, power_domains->allowed_dc_mask);
+ goto unlock;
+ }
power_well = lookup_power_well(display, SKL_DISP_DC_OFF);
if (drm_WARN_ON(display->drm, !power_well))
@@ -358,6 +365,13 @@ u32 intel_display_power_get_current_dc_state(struct intel_display *display)
return current_dc_state;
}
+bool intel_display_power_dc3co_supported(struct intel_display *display)
+{
+ struct i915_power_domains *power_domains = &display->power.domains;
+
+ return (power_domains->allowed_dc_mask & DC_STATE_EN_UPTO_DC3CO) == DC_STATE_EN_UPTO_DC3CO;
+}
+
static void __async_put_domains_mask(struct i915_power_domains *power_domains,
struct intel_power_domain_mask *mask)
{
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.h b/drivers/gpu/drm/i915/display/intel_display_power.h
index d616d5d09cbe..05880e9da89f 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.h
+++ b/drivers/gpu/drm/i915/display/intel_display_power.h
@@ -186,6 +186,7 @@ void intel_display_power_resume(struct intel_display *display);
void intel_display_power_set_target_dc_state(struct intel_display *display,
u32 state);
u32 intel_display_power_get_current_dc_state(struct intel_display *display);
+bool intel_display_power_dc3co_supported(struct intel_display *display);
bool intel_display_power_is_enabled(struct intel_display *display,
enum intel_display_power_domain domain);
--
2.43.0
next prev parent reply other threads:[~2026-04-22 16:26 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-22 16:26 [PATCH v2 00/13] drm/i915/display: Add DC3CO support Dibin Moolakadan Subrahmanian
2026-04-22 16:26 ` [PATCH v2 01/13] drm/i915/display: Remove TGL " Dibin Moolakadan Subrahmanian
2026-04-22 16:26 ` [PATCH v2 02/13] drm/i915/display: Switch DC3Co enable from standalone bit to DC level encoding Dibin Moolakadan Subrahmanian
2026-04-22 16:26 ` [PATCH v2 03/13] drm/i915/display: Use FIELD_PREP() for DC state enable bits Dibin Moolakadan Subrahmanian
2026-04-22 16:26 ` [PATCH v2 04/13] drm/i915/display: Add DC3CO DC_STATE enable/disable support Dibin Moolakadan Subrahmanian
2026-04-22 16:26 ` Dibin Moolakadan Subrahmanian [this message]
2026-04-29 5:13 ` [PATCH v2 05/13] drm/i915/display: Add DC3CO support check and validate target DC state Manna, Animesh
2026-04-29 7:31 ` Dibin Moolakadan Subrahmanian
2026-04-22 16:26 ` [PATCH v2 06/13] drm/i915/display: Add HAS_DC3CO() macro Dibin Moolakadan Subrahmanian
2026-04-27 3:00 ` Shankar, Uma
2026-04-22 16:26 ` [PATCH v2 07/13] drm/i915/display: Add DC3CO eligibility computation Dibin Moolakadan Subrahmanian
2026-04-27 3:10 ` Shankar, Uma
2026-04-27 6:06 ` Dibin Moolakadan Subrahmanian
2026-04-29 5:42 ` Manna, Animesh
2026-04-29 7:05 ` Dibin Moolakadan Subrahmanian
2026-04-22 16:26 ` [PATCH v2 08/13] drm/i915/display: Store DC3CO eligibility in PSR state Dibin Moolakadan Subrahmanian
2026-04-27 3:11 ` Shankar, Uma
2026-04-22 16:26 ` [PATCH v2 09/13] drm/i915/display: PSR2: Set idle_frames to 0 for DC3CO Dibin Moolakadan Subrahmanian
2026-04-27 3:13 ` Shankar, Uma
2026-04-22 16:26 ` [PATCH v2 10/13] drm/i915/display: Enable DC3CO idle protocol in ALPM Dibin Moolakadan Subrahmanian
2026-04-27 3:14 ` Shankar, Uma
2026-04-22 16:26 ` [PATCH v2 11/13] drm/i915/display: PSR Add delayed work to exit DC3CO Dibin Moolakadan Subrahmanian
2026-04-27 3:15 ` Shankar, Uma
2026-04-22 16:26 ` [PATCH v2 12/13] drm/i915/display: Add helper to enable DC counter Dibin Moolakadan Subrahmanian
2026-04-22 16:26 ` [PATCH v2 13/13] drm/i915/display: Add DC3CO count and residency in dmc debugfs Dibin Moolakadan Subrahmanian
2026-04-22 21:27 ` ✓ CI.KUnit: success for drm/i915/display: Add DC3CO support (rev2) Patchwork
2026-04-22 22:50 ` ✓ Xe.CI.BAT: " Patchwork
2026-04-23 6:15 ` ✗ Xe.CI.FULL: failure " Patchwork
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