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From: Arun R Murthy <arun.r.murthy@intel.com>
To: Jani Nikula <jani.nikula@linux.intel.com>,
	uma.shankar@intel.com,  suraj.kandpal@intel.com,
	ankit.k.nautiyal@intel.com
Cc: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org,
	 Arun R Murthy <arun.r.murthy@intel.com>
Subject: [PATCH v2 1/2] drm/i915/cx0_phy_regs: Include SoC and OS turnaround time
Date: Thu, 12 Feb 2026 12:04:21 +0530	[thread overview]
Message-ID: <20260212-timeout-v2-1-74bccad5018d@intel.com> (raw)
In-Reply-To: <20260212-timeout-v2-0-74bccad5018d@intel.com>

The port refclk enable timeout and the soc ready timeout value mentioned
in the spec is the PHY timings and doesn't include the turnaround time
from the SoC or OS. So add an overhead timeout value on top of the
recommended timeouts from the PHY spec.
The overhead value is based on the stress test results with multiple
available panels.

Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
---
 drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h b/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h
index 658890f7351530e5686c23e067deb359b3283d59..152a4e751bdcf216a95714a2bd2d6612cbbd4698 100644
--- a/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h
+++ b/drivers/gpu/drm/i915/display/intel_cx0_phy_regs.h
@@ -78,10 +78,10 @@
 #define XELPDP_PCLK_PLL_ENABLE_TIMEOUT_US		3200
 #define XELPDP_PCLK_PLL_DISABLE_TIMEOUT_US		20
 #define XELPDP_PORT_BUF_SOC_READY_TIMEOUT_US		100
-#define XELPDP_PORT_RESET_START_TIMEOUT_US		5
+#define XELPDP_PORT_RESET_START_TIMEOUT_US		10
 #define XELPDP_PORT_POWERDOWN_UPDATE_TIMEOUT_MS		2
 #define XELPDP_PORT_RESET_END_TIMEOUT_MS		15
-#define XELPDP_REFCLK_ENABLE_TIMEOUT_US			1
+#define XELPDP_REFCLK_ENABLE_TIMEOUT_US			10
 
 #define _XELPDP_PORT_BUF_CTL1_LN0_A			0x64004
 #define _XELPDP_PORT_BUF_CTL1_LN0_B			0x64104

-- 
2.25.1


  reply	other threads:[~2026-02-12  6:35 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-12  6:34 [PATCH v2 0/2] Update the PHY timeouts Arun R Murthy
2026-02-12  6:34 ` Arun R Murthy [this message]
2026-02-12  6:34 ` [PATCH v2 2/2] drm/i915/lt_phy_regs: Add SoC/OS turnaround time Arun R Murthy
2026-02-13  6:32 ` ✓ CI.KUnit: success for Update the PHY timeouts (rev2) Patchwork
2026-02-13  6:47 ` ✗ CI.checksparse: warning " Patchwork
2026-02-13  7:07 ` ✓ Xe.CI.BAT: success " Patchwork
2026-02-14  3:26 ` ✗ Xe.CI.FULL: failure " Patchwork

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