Attachment 144248 Details for Bug 105406 – [PATCH 1/2] drm/dp: Add DP_DPCD_QUIRK_NO_SINK_COUNT

[patch] [PATCH 1/2] drm/dp: Add DP_DPCD_QUIRK_NO_SINK_COUNT

0001-drm-dp-Add-DP_DPCD_QUIRK_NO_SINK_COUNT.patch (text/plain), 2.15 KB, created by Ville Syrjala on 2019-05-13 16:21:37 UTC

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Creator: Ville Syrjala

Created: 2019-05-13 16:21:37 UTC

Size: 2.15 KB

patch

obsolete

>From 37298491825d24a6802bd7fc9dffc9d9931bdc8c Mon Sep 17 00:00:00 2001
>From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
>Date: Mon, 13 May 2019 18:59:36 +0300
>Subject: [PATCH 1/2] drm/dp: Add DP_DPCD_QUIRK_NO_SINK_COUNT
>MIME-Version: 1.0
>Content-Type: text/plain; charset=UTF-8
>Content-Transfer-Encoding: 8bit
>
>CH7511 DP->LVDS bridge doesn't seem to set SINK_COUNT properly
>causing i915 to detect it as disconnected. Add a quirk to ignore
>SINK_COUNT on these devices.
>
>Cc: David S. <david@majinbuu.com>
>Cc: Peteris Rudzusiks <peteris.rudzusiks@gmail.com>
>Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105406
>Signed-off-by: Ville SyrjÃ¤lÃ¤ <ville.syrjala@linux.intel.com>
>---
> drivers/gpu/drm/drm_dp_helper.c | 4 +++-
> include/drm/drm_dp_helper.h     | 7 +++++++
> 2 files changed, 10 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
>index e6af758a7d22..0b994d083a89 100644
>--- a/drivers/gpu/drm/drm_dp_helper.c
>+++ b/drivers/gpu/drm/drm_dp_helper.c
>@@ -1280,7 +1280,9 @@ static const struct dpcd_quirk dpcd_quirk_list[] = {
> 	/* LG LP140WF6-SPM1 eDP panel */
> 	{ OUI(0x00, 0x22, 0xb9), DEVICE_ID('s', 'i', 'v', 'a', 'r', 'T'), false, BIT(DP_DPCD_QUIRK_CONSTANT_N) },
> 	/* Apple panels need some additional handling to support PSR */
>-	{ OUI(0x00, 0x10, 0xfa), DEVICE_ID_ANY, false, BIT(DP_DPCD_QUIRK_NO_PSR) }
>+	{ OUI(0x00, 0x10, 0xfa), DEVICE_ID_ANY, false, BIT(DP_DPCD_QUIRK_NO_PSR) },
>+	/* CH7511 seems to leave SINK_COUNT zeroed */
>+	{ OUI(0x00, 0x00, 0x00), DEVICE_ID('C', 'H', '7', '5', '1', '1'), false, BIT(DP_DPCD_QUIRK_NO_SINK_COUNT) },
> };
> 
> #undef OUI
>diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
>index 97ce790a5b5a..d6c89cbe127a 100644
>--- a/include/drm/drm_dp_helper.h
>+++ b/include/drm/drm_dp_helper.h
>@@ -1401,6 +1401,13 @@ enum drm_dp_quirk {
> 	 * driver still need to implement proper handling for such device.
> 	 */
> 	DP_DPCD_QUIRK_NO_PSR,
>+	/**
>+	 * @DP_DPCD_QUIRK_NO_SINK_COUNT:
>+	 *
>+	 * The device does not set SINK_COUNT to a non-zero value.
>+	 * The driver should ignore SINK_COUNT during detection.
>+	 */
>+	DP_DPCD_QUIRK_NO_SINK_COUNT,
> };
> 
> /**
>-- 
>2.21.0
>

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Attachments on bug 105406: 138112 | 138133 | 139221 | 139222 | 144239 | 144247 | 144248 | 144249

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