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From: Lyude Paul <lyude@redhat.com>
To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org
Cc: "Daniel Vetter" <daniel@ffwll.ch>,
	"David Airlie" <airlied@linux.ie>,
	"Rodrigo Vivi" <rodrigo.vivi@intel.com>,
	linux-kernel@vger.kernel.org,
	"Jani Nikula" <jani.nikula@linux.intel.com>,
	"Juha-Pekka Heikkila" <juhapekka.heikkila@gmail.com>,
	"Chris Wilson" <chris@chris-wilson.co.uk>,
	"Ville Syrjälä" <ville.syrjala@linux.intel.com>,
	"Joonas Lahtinen" <joonas.lahtinen@linux.intel.com>,
	"Lee Shawn C" <shawn.c.lee@intel.com>,
	"Lyude Paul" <lyude@redhat.com>,
	"Lucas De Marchi" <lucas.demarchi@intel.com>,
	"Gwan-gyeong Mun" <gwan-gyeong.mun@intel.com>,
	"Manasi Navare" <manasi.d.navare@intel.com>,
	"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
	"Imre Deak" <imre.deak@intel.com>,
	"Ramalingam C" <ramalingam.c@intel.com>,
	"Thomas Zimmermann" <tzimmermann@suse.de>,
	"Maxime Ripard" <mripard@kernel.org>,
	"José Roberto de Souza" <jose.souza@intel.com>
Subject: [PATCH 0/4] drm/dp,i915: eDP DPCD backlight control detection fixes
Date: Tue,  4 Feb 2020 14:28:08 -0500	[thread overview]
Message-ID: <20200204192823.111404-1-lyude@redhat.com> (raw)

Unfortunately, it turned out that the DPCD is also not a reliable way of
probing for DPCD backlight support as some panels will lie and say they
have DPCD backlight controls when they don't actually.

So, revert back to the old behavior and add a bunch of EDID-based DP
quirks for the panels that we know need this. As you might have already
guessed, OUI quirks didn't seem to be a very safe bet for these panels
due to them not having their device IDs filled out.

Lyude Paul (4):
  Revert "drm/i915: Don't use VBT for detecting DPCD backlight controls"
  drm/dp: Introduce EDID-based quirks
  drm/i915: Force DPCD backlight mode on X1 Extreme 2nd Gen 4K AMOLED
    panel
  drm/i915: Force DPCD backlight mode for some Precision 7750 panels

 drivers/gpu/drm/drm_dp_helper.c               | 78 +++++++++++++++++++
 drivers/gpu/drm/drm_dp_mst_topology.c         |  3 +-
 .../drm/i915/display/intel_display_types.h    |  1 +
 drivers/gpu/drm/i915/display/intel_dp.c       | 11 ++-
 .../drm/i915/display/intel_dp_aux_backlight.c | 28 +++++--
 drivers/gpu/drm/i915/display/intel_dp_mst.c   |  2 +-
 drivers/gpu/drm/i915/display/intel_psr.c      |  2 +-
 include/drm/drm_dp_helper.h                   | 21 ++++-
 8 files changed, 130 insertions(+), 16 deletions(-)

-- 
2.24.1


WARNING: multiple messages have this Message-ID (diff)
From: Lyude Paul <lyude@redhat.com>
To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org
Cc: "Thomas Zimmermann" <tzimmermann@suse.de>,
	"Juha-Pekka Heikkila" <juhapekka.heikkila@gmail.com>,
	"David Airlie" <airlied@linux.ie>,
	"Lucas De Marchi" <lucas.demarchi@intel.com>,
	linux-kernel@vger.kernel.org,
	"Manasi Navare" <manasi.d.navare@intel.com>,
	"Rodrigo Vivi" <rodrigo.vivi@intel.com>,
	"José Roberto de Souza" <jose.souza@intel.com>,
	"Gwan-gyeong Mun" <gwan-gyeong.mun@intel.com>,
	"Lee Shawn C" <shawn.c.lee@intel.com>
Subject: [PATCH 0/4] drm/dp,i915: eDP DPCD backlight control detection fixes
Date: Tue,  4 Feb 2020 14:28:08 -0500	[thread overview]
Message-ID: <20200204192823.111404-1-lyude@redhat.com> (raw)

Unfortunately, it turned out that the DPCD is also not a reliable way of
probing for DPCD backlight support as some panels will lie and say they
have DPCD backlight controls when they don't actually.

So, revert back to the old behavior and add a bunch of EDID-based DP
quirks for the panels that we know need this. As you might have already
guessed, OUI quirks didn't seem to be a very safe bet for these panels
due to them not having their device IDs filled out.

Lyude Paul (4):
  Revert "drm/i915: Don't use VBT for detecting DPCD backlight controls"
  drm/dp: Introduce EDID-based quirks
  drm/i915: Force DPCD backlight mode on X1 Extreme 2nd Gen 4K AMOLED
    panel
  drm/i915: Force DPCD backlight mode for some Precision 7750 panels

 drivers/gpu/drm/drm_dp_helper.c               | 78 +++++++++++++++++++
 drivers/gpu/drm/drm_dp_mst_topology.c         |  3 +-
 .../drm/i915/display/intel_display_types.h    |  1 +
 drivers/gpu/drm/i915/display/intel_dp.c       | 11 ++-
 .../drm/i915/display/intel_dp_aux_backlight.c | 28 +++++--
 drivers/gpu/drm/i915/display/intel_dp_mst.c   |  2 +-
 drivers/gpu/drm/i915/display/intel_psr.c      |  2 +-
 include/drm/drm_dp_helper.h                   | 21 ++++-
 8 files changed, 130 insertions(+), 16 deletions(-)

-- 
2.24.1

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

WARNING: multiple messages have this Message-ID (diff)
From: Lyude Paul <lyude@redhat.com>
To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org
Cc: Thomas Zimmermann <tzimmermann@suse.de>,
	David Airlie <airlied@linux.ie>,
	Lucas De Marchi <lucas.demarchi@intel.com>,
	linux-kernel@vger.kernel.org, Maxime Ripard <mripard@kernel.org>
Subject: [Intel-gfx] [PATCH 0/4] drm/dp, i915: eDP DPCD backlight control detection fixes
Date: Tue,  4 Feb 2020 14:28:08 -0500	[thread overview]
Message-ID: <20200204192823.111404-1-lyude@redhat.com> (raw)

Unfortunately, it turned out that the DPCD is also not a reliable way of
probing for DPCD backlight support as some panels will lie and say they
have DPCD backlight controls when they don't actually.

So, revert back to the old behavior and add a bunch of EDID-based DP
quirks for the panels that we know need this. As you might have already
guessed, OUI quirks didn't seem to be a very safe bet for these panels
due to them not having their device IDs filled out.

Lyude Paul (4):
  Revert "drm/i915: Don't use VBT for detecting DPCD backlight controls"
  drm/dp: Introduce EDID-based quirks
  drm/i915: Force DPCD backlight mode on X1 Extreme 2nd Gen 4K AMOLED
    panel
  drm/i915: Force DPCD backlight mode for some Precision 7750 panels

 drivers/gpu/drm/drm_dp_helper.c               | 78 +++++++++++++++++++
 drivers/gpu/drm/drm_dp_mst_topology.c         |  3 +-
 .../drm/i915/display/intel_display_types.h    |  1 +
 drivers/gpu/drm/i915/display/intel_dp.c       | 11 ++-
 .../drm/i915/display/intel_dp_aux_backlight.c | 28 +++++--
 drivers/gpu/drm/i915/display/intel_dp_mst.c   |  2 +-
 drivers/gpu/drm/i915/display/intel_psr.c      |  2 +-
 include/drm/drm_dp_helper.h                   | 21 ++++-
 8 files changed, 130 insertions(+), 16 deletions(-)

-- 
2.24.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

             reply	other threads:[~2020-02-04 19:28 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-04 19:28 Lyude Paul [this message]
2020-02-04 19:28 ` [Intel-gfx] [PATCH 0/4] drm/dp, i915: eDP DPCD backlight control detection fixes Lyude Paul
2020-02-04 19:28 ` [PATCH 0/4] drm/dp,i915: " Lyude Paul
2020-02-04 19:28 ` [PATCH 1/4] Revert "drm/i915: Don't use VBT for detecting DPCD backlight controls" Lyude Paul
2020-02-04 19:28   ` [Intel-gfx] " Lyude Paul
2020-02-04 19:28   ` Lyude Paul
2020-02-07 11:11   ` Jani Nikula
2020-02-07 11:11     ` [Intel-gfx] " Jani Nikula
2020-02-07 11:11     ` Jani Nikula
2020-02-04 19:28 ` [PATCH 2/4] drm/dp: Introduce EDID-based quirks Lyude Paul
2020-02-04 19:28   ` [Intel-gfx] " Lyude Paul
2020-02-04 19:28   ` Lyude Paul
2020-02-04 19:28 ` [PATCH 3/4] drm/i915: Force DPCD backlight mode on X1 Extreme 2nd Gen 4K AMOLED panel Lyude Paul
2020-02-04 19:28   ` [Intel-gfx] " Lyude Paul
2020-02-04 19:28   ` Lyude Paul
2020-02-04 19:28 ` [PATCH 4/4] drm/i915: Force DPCD backlight mode for some Precision 7750 panels Lyude Paul
2020-02-04 19:28   ` [Intel-gfx] " Lyude Paul
2020-02-04 19:28   ` Lyude Paul
2020-02-05  5:17 ` [Intel-gfx] ✓ Fi.CI.BAT: success for drm/dp, i915: eDP DPCD backlight control detection fixes Patchwork
2020-02-07 10:12 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork

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