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[PATCH 4.4 101/103] drm/edid: Add 10 bpc quirk for LGD 764 panel in HP zBook 17 G2

From Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Newsgroups linux.kernel
Subject [PATCH 4.4 101/103] drm/edid: Add 10 bpc quirk for LGD 764 panel in HP zBook 17 G2
Date 2017-05-23 23:30 +0200
Message-ID <tKpxp-AI-61@gated-at.bofh.it> (permalink)
References <tKoKZ-8pv-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mario Kleiner <mario.kleiner.de@gmail.com>

commit e345da82bd6bdfa8492f80b3ce4370acfd868d95 upstream.

The builtin eDP panel in the HP zBook 17 G2 supports 10 bpc,
as advertised by the Laptops product specs and verified via
injecting a fixed edid + photometer measurements, but edid
reports unknown depth, so drivers fall back to 6 bpc.

Add a quirk to get the full 10 bpc.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1492787108-23959-1-git-send-email-mario.kleiner.de@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/drm_edid.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -75,6 +75,8 @@
 #define EDID_QUIRK_FORCE_12BPC			(1 << 9)
 /* Force 6bpc */
 #define EDID_QUIRK_FORCE_6BPC			(1 << 10)
+/* Force 10bpc */
+#define EDID_QUIRK_FORCE_10BPC			(1 << 11)
 
 struct detailed_mode_closure {
 	struct drm_connector *connector;
@@ -117,6 +119,9 @@ static struct edid_quirk {
 	{ "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
 	  EDID_QUIRK_DETAILED_IN_CM },
 
+	/* LGD panel of HP zBook 17 G2, eDP 10 bpc, but reports unknown bpc */
+	{ "LGD", 764, EDID_QUIRK_FORCE_10BPC },
+
 	/* LG Philips LCD LP154W01-A5 */
 	{ "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
 	{ "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
@@ -3834,6 +3839,9 @@ int drm_add_edid_modes(struct drm_connec
 	if (quirks & EDID_QUIRK_FORCE_8BPC)
 		connector->display_info.bpc = 8;
 
+	if (quirks & EDID_QUIRK_FORCE_10BPC)
+		connector->display_info.bpc = 10;
+
 	if (quirks & EDID_QUIRK_FORCE_12BPC)
 		connector->display_info.bpc = 12;

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[PATCH 4.4 000/103] 4.4.70-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:00 +0200
  [PATCH 4.4 099/103] PCI: Fix pci_mmap_fits() for HAVE_PCI_RESOURCE_TO_USER platforms Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:00 +0200
  [PATCH 4.4 098/103] tracing/kprobes: Enforce kprobes teardown after testing Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:00 +0200
  [PATCH 4.4 097/103] osf_wait4(): fix infoleak Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:00 +0200
  [PATCH 4.4 095/103] uwb: fix device quirk on big-endian hosts Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:00 +0200
  [PATCH 4.4 012/103] dm bufio: avoid a possible ABBA deadlock Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:00 +0200
  [PATCH 4.4 037/103] proc: Fix unbalanced hard link numbers Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:00 +0200
  [PATCH 4.4 029/103] drm/amdgpu: Avoid overflows/divide-by-zero in latency_watermark calculations. Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:00 +0200
  [PATCH 4.4 034/103] drm/nouveau/tmr: avoid processing completed alarms when adding a new one Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:00 +0200
  [PATCH 4.4 030/103] drm/amdgpu: Make display watermark calculations more accurate Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:00 +0200
  [PATCH 4.4 078/103] [media] cx231xx-cards: fix NULL-deref at probe Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:00 +0200
  [PATCH 4.4 014/103] dm cache metadata: fail operations if fail_io mode has been established Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:00 +0200
  [PATCH 4.4 077/103] [media] cx231xx-audio: fix NULL-deref at probe Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:10 +0200
  [PATCH 4.4 080/103] powerpc/pseries: Fix of_node_put() underflow during DLPAR remove Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:10 +0200
  [PATCH 4.4 073/103] [media] dib0700: fix NULL-deref at probe Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:20 +0200
  [PATCH 4.4 082/103] ARM: dts: at91: sama5d3_xplained: fix ADC vref Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:20 +0200
  [PATCH 4.4 081/103] powerpc/64e: Fix hang when debugging programs with relocated kernel Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:20 +0200
  [PATCH 4.4 079/103] powerpc/book3s/mce: Move add_taint() later in virtual mode Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:20 +0200
  [PATCH 4.4 102/103] nfsd: encoders mustnt use unitialized values in error cases Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:30 +0200
  [PATCH 4.4 103/103] drivers: char: mem: Check for address space wraparound with mmap() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:30 +0200
  [PATCH 4.4 101/103] drm/edid: Add 10 bpc quirk for LGD 764 panel in HP zBook 17 G2 Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-23 23:30 +0200
  Re: [PATCH 4.4 000/103] 4.4.70-stable review Guenter Roeck <linux@roeck-us.net> - 2017-05-24 06:10 +0200
    Re: [PATCH 4.4 000/103] 4.4.70-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-24 09:00 +0200
      Re: [PATCH 4.4 000/103] 4.4.70-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-24 09:00 +0200
  Re: [PATCH 4.4 000/103] 4.4.70-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-24 09:10 +0200
    Re: [PATCH 4.4 000/103] 4.4.70-stable review Thomas Voegtle <tv@lio96.de> - 2017-05-24 11:40 +0200
      Re: [PATCH 4.4 000/103] 4.4.70-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-24 13:40 +0200
        Re: [PATCH 4.4 000/103] 4.4.70-stable review Thomas Voegtle <tv@lio96.de> - 2017-05-24 14:10 +0200
          Re: [PATCH 4.4 000/103] 4.4.70-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-05-24 15:00 +0200
    Re: [PATCH 4.4 000/103] 4.4.70-stable review Guenter Roeck <linux@roeck-us.net> - 2017-05-24 14:50 +0200
      Re: [PATCH 4.4 000/103] 4.4.70-stable review Mark Brown <broonie@kernel.org> - 2017-05-24 15:10 +0200
        Re: [PATCH 4.4 000/103] 4.4.70-stable review Guenter Roeck <linux@roeck-us.net> - 2017-05-24 15:20 +0200
          Re: [PATCH 4.4 000/103] 4.4.70-stable review Mark Brown <broonie@kernel.org> - 2017-05-24 17:10 +0200
        Re: [PATCH 4.4 000/103] 4.4.70-stable review Guenter Roeck <linux@roeck-us.net> - 2017-05-24 15:40 +0200
  Re: [PATCH 4.4 000/103] 4.4.70-stable review Guenter Roeck <linux@roeck-us.net> - 2017-05-24 22:30 +0200

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