From: Lukas Wunner <lukas@wunner.de>
To: dri-devel@lists.freedesktop.org
Cc: William Brown <william@blackhats.net.au>
Subject: [PATCH v3 2/6] apple-gmux: Add switch_ddc support
Date: Fri, 14 Aug 2015 18:18:55 +0200 [thread overview]
Message-ID: <90fa3492f441814eab48c7df2431bcac39d6219a.1443952353.git.lukas@wunner.de> (raw)
In-Reply-To: <a46bc3667badb466475ed9ab6eac21c2b4814741.1443952353.git.lukas@wunner.de>
Originally by Seth Forshee <seth.forshee@canonical.com>, 2012-10-04:
The gmux allows muxing the DDC independently from the display, so
support this functionality. This will allow reading the EDID for the
inactive GPU, fixing issues with machines that either don't have a
VBT or have invalid mode data in the VBT.
Modified by Lukas Wunner <lukas@wunner.de>, 2015-08-28:
Retain semantics of ->switchto handler callback to switch all pins,
including DDC. Change semantics of ->switch_ddc handler callback to
return previous DDC owner. Original version tried to determine
previous DDC owner with find_active_client() in vga_switcheroo but
this fails if the inactive client registers before the active
client.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=88861
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=61115
Tested-by: Pierre Moreau <pierre.morrow@free.fr>
[MBP 5,3 2009 nvidia MCP79 + G96 pre-retina 15"]
Tested-by: William Brown <william@blackhats.net.au>
[MBP 8,2 2011 intel SNB + amd turks pre-retina 15"]
Tested-by: Lukas Wunner <lukas@wunner.de>
[MBP 9,1 2012 intel IVB + nvidia GK107 pre-retina 15"]
Cc: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
---
drivers/platform/x86/apple-gmux.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/platform/x86/apple-gmux.c b/drivers/platform/x86/apple-gmux.c
index 0dec3f5..5bb231b 100644
--- a/drivers/platform/x86/apple-gmux.c
+++ b/drivers/platform/x86/apple-gmux.c
@@ -273,6 +273,28 @@ static const struct backlight_ops gmux_bl_ops = {
.update_status = gmux_update_status,
};
+static int gmux_switch_ddc(enum vga_switcheroo_client_id id)
+{
+ enum vga_switcheroo_client_id old_ddc_owner;
+
+ if (gmux_read8(apple_gmux_data, GMUX_PORT_SWITCH_DDC) == 1)
+ old_ddc_owner = VGA_SWITCHEROO_IGD;
+ else
+ old_ddc_owner = VGA_SWITCHEROO_DIS;
+
+ pr_debug("Switching gmux DDC from %d to %d\n", old_ddc_owner, id);
+
+ if (id == old_ddc_owner)
+ return old_ddc_owner;
+
+ if (id == VGA_SWITCHEROO_IGD)
+ gmux_write8(apple_gmux_data, GMUX_PORT_SWITCH_DDC, 1);
+ else
+ gmux_write8(apple_gmux_data, GMUX_PORT_SWITCH_DDC, 2);
+
+ return old_ddc_owner;
+}
+
static int gmux_switchto(enum vga_switcheroo_client_id id)
{
if (id == VGA_SWITCHEROO_IGD) {
@@ -348,6 +370,7 @@ gmux_active_client(struct apple_gmux_data *gmux_data)
static struct vga_switcheroo_handler gmux_handler = {
.switchto = gmux_switchto,
+ .switch_ddc = gmux_switch_ddc,
.power_state = gmux_set_power_state,
.get_client_id = gmux_get_client_id,
};
--
1.8.5.2 (Apple Git-48)
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next prev parent reply other threads:[~2015-10-05 13:10 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-04 9:52 [PATCH v3 0/6] Enable gpu switching on the MacBook Pro Lukas Wunner
2015-08-14 16:50 ` [PATCH v3 1/6] vga_switcheroo: Add support for switching only the DDC Lukas Wunner
2015-08-14 16:18 ` Lukas Wunner [this message]
2015-08-14 16:28 ` [PATCH v3 3/6] drm/edid: Switch DDC when reading the EDID Lukas Wunner
2015-09-11 10:40 ` [PATCH v3 4/6] drm/i915: " Lukas Wunner
2015-05-09 15:20 ` [PATCH v3 5/6] drm/nouveau: " Lukas Wunner
2015-09-12 7:44 ` [PATCH v3 6/6] drm/radeon: " Lukas Wunner
2015-10-08 3:14 ` Alex Deucher
2015-10-08 14:53 ` Lukas Wunner
2015-10-12 18:59 ` Alex Deucher
2015-10-06 7:27 ` [PATCH v3 1/6] vga_switcheroo: Add support for switching only the DDC Daniel Vetter
2015-10-06 10:10 ` Lukas Wunner
2015-10-06 11:10 ` Daniel Vetter
2015-10-06 18:27 ` Lukas Wunner
2015-10-07 7:52 ` Daniel Vetter
2015-10-12 15:17 ` [PATCH 0/9] vga_switcheroo cleanup Lukas Wunner
2015-08-28 9:56 ` [PATCH 1/9] vga_switcheroo: Use enum vga_switcheroo_state instead of int Lukas Wunner
2015-10-12 16:09 ` Alex Deucher
2015-08-28 10:54 ` [PATCH 3/9] vga_switcheroo: Use enum vga_switcheroo_client_id " Lukas Wunner
2015-10-12 16:10 ` Alex Deucher
2015-08-28 11:30 ` [PATCH 2/9] vga_switcheroo: Use VGA_SWITCHEROO_UNKNOWN_ID instead of -1 Lukas Wunner
2015-10-12 16:09 ` Alex Deucher
2015-10-13 7:28 ` Daniel Vetter
2015-10-15 18:14 ` Lukas Wunner
2015-10-16 14:25 ` Daniel Vetter
2015-09-04 18:49 ` [PATCH 4/9] ALSA: hda - Spell vga_switcheroo consistently Lukas Wunner
2015-10-12 8:57 ` [PATCH 5/9] drm/i915: Drop unnecessary #include <linux/vga_switcheroo.h> Lukas Wunner
2015-10-13 7:25 ` Daniel Vetter
2015-10-13 7:26 ` Jani Nikula
2015-10-12 9:15 ` [PATCH 6/9] drm/radeon: " Lukas Wunner
2015-10-12 9:44 ` [PATCH 8/9] drm/radeon: Fix kernel-doc copy/paste snafu Lukas Wunner
2015-10-12 16:02 ` Alex Deucher
2015-10-12 16:36 ` Lukas Wunner
2015-10-12 9:54 ` [PATCH 7/9] drm/amdgpu: Drop unnecessary #include <linux/vga_switcheroo.h> Lukas Wunner
2015-10-12 16:27 ` Alex Deucher
2015-10-12 10:00 ` [PATCH 9/9] drm/amdgpu: Fix kernel-doc copy/paste snafu Lukas Wunner
2015-10-12 16:03 ` Alex Deucher
[not found] ` <20151006182744.GA15532-JFq808J9C/izQB+pC5nmwQ@public.gmane.org>
2015-10-12 17:14 ` [PATCH v4 0/6] Enable gpu switching on the MacBook Pro Lukas Wunner
[not found] ` <cover.1444670070.git.lukas-JFq808J9C/izQB+pC5nmwQ@public.gmane.org>
2015-05-09 15:20 ` [PATCH v4 5/6] drm/nouveau: Switch DDC when reading the EDID Lukas Wunner
2015-08-14 16:18 ` [PATCH v4 2/6] apple-gmux: Add switch_ddc support Lukas Wunner
2015-10-12 21:07 ` Alex Deucher
2015-10-12 21:10 ` Alex Deucher
2015-10-13 7:32 ` Daniel Vetter
2015-10-29 14:58 ` Lukas Wunner
2015-10-15 4:51 ` Darren Hart
2015-10-15 6:27 ` Daniel Vetter
2015-08-14 16:28 ` [PATCH v4 3/6] drm/edid: Switch DDC when reading the EDID Lukas Wunner
2015-08-14 16:50 ` [PATCH v4 1/6] vga_switcheroo: Add support for switching only the DDC Lukas Wunner
2015-09-11 10:40 ` [PATCH v4 4/6] drm/i915: Switch DDC when reading the EDID Lukas Wunner
2015-09-12 7:44 ` [PATCH v4 6/6] drm/radeon: " Lukas Wunner
2015-10-05 13:23 ` [PATCH v3 0/6] Enable gpu switching on the MacBook Pro Lukas Wunner
[not found] ` <20151005132349.GA15130-JFq808J9C/izQB+pC5nmwQ@public.gmane.org>
2015-10-05 14:15 ` Evan Foss
2015-10-05 15:17 ` [Nouveau] " Lukas Wunner
[not found] ` <20151005151704.GA15177-JFq808J9C/izQB+pC5nmwQ@public.gmane.org>
2015-10-05 15:23 ` Evan Foss
2015-10-05 15:31 ` [Nouveau] " Lukas Wunner
[not found] ` <CAM2RGhT5x9GoNU4xPwzoEoiWKqVrC2pwp3ydFgaXFwtsYiBa7A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-10-05 15:20 ` Pierre Moreau
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