linux-kernel - Re: [PATCH v7] drm/dp: clamp PWM bit count to advertised MIN and MAX capabilities

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Message-Id: <175930340683.467410.13115461140906052706.b4-ty@linaro.org>
Date: Wed, 01 Oct 2025 09:23:26 +0200
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Neil Armstrong <neil.armstrong@...aro.org>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 johan@...nel.org, dmitry.baryshkov@....qualcomm.com, 
 linux-arm-msm@...r.kernel.org, 
 Christopher Obbard <christopher.obbard@...aro.org>, 
 Rui Miguel Silva <rui.silva@...aro.org>
Subject: Re: [PATCH v7] drm/dp: clamp PWM bit count to advertised MIN and
 MAX capabilities

Hi,

On Thu, 14 Aug 2025 16:16:09 +0200, Neil Armstrong wrote:
> According to the eDP specification (VESA Embedded DisplayPort Standard
> v1.4b, Section 3.3.10.2), if the value of DP_EDP_PWMGEN_BIT_COUNT is
> less than DP_EDP_PWMGEN_BIT_COUNT_CAP_MIN, the sink is required to use
> the MIN value as the effective PWM bit count.
> 
> This commit updates the logic to clamp the reported
> DP_EDP_PWMGEN_BIT_COUNT to the range defined by _CAP_MIN and _CAP_MAX.
> 
> [...]

Thanks, Applied to https://gitlab.freedesktop.org/drm/misc/kernel.git (drm-misc-next)

[1/1] drm/dp: clamp PWM bit count to advertised MIN and MAX capabilities
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/68a7c52fa9e778bda45ed0b2e83a0bf2ea41b88c

-- 
Neil