Applying this quirk to the 855GM in all systems causes regressions
(Debian bugs #493096, #619019). Instead, apply the quirk to specific
models as listed in the old X driver.

I don't see any explanation for this quirk being applied to the 845G,
except perhaps that VT switching used to hang if pipe A was turned
off. However, that seems to be a problem only when using UMS. So
remove the quirk for the 845G as well.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
Needs people to test it, as I can't.

Ben.

drivers/gpu/drm/i915/intel_display.c | 23 +++++++++++++++++++----
1 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3106c0d..a490f75 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7345,19 +7345,34 @@ struct intel_quirk intel_quirks[] = {

/* Thinkpad R31 needs pipe A force quirk */
{ 0x3577, 0x1014, 0x0505, quirk_pipea_force },
+ /* Dell Latitude D400 needs pipe A force quirk (LP: #228519) */
+ { 0x3582, 0x1028, 0x0139, quirk_pipea_force },
+ /* Dell Latitude D500 needs pipe A force quirk */
+ { 0x3582, 0x1028, 0x0152, quirk_pipea_force },
+ /* Dell Latitude D505 needs pipe A force quirk (LP: #235643) */
+ { 0x3582, 0x1028, 0x0163, quirk_pipea_force },
+ /* Dell Latitude X300 needs pipe A force quirk */
+ { 0x3582, 0x1028, 0x014f, quirk_pipea_force },
+ /* Dell Inspiron 510m needs pipe A force quirk */
+ { 0x3582, 0x1028, 0x0164, quirk_pipea_force },
+ /* Toshiba Satellite A30 needs pipe A force quirk */
+ { 0x3582, 0x1179, 0xff00, quirk_pipea_force },
/* Toshiba Protege R-205, S-209 needs pipe A force quirk */
{ 0x2592, 0x1179, 0x0001, quirk_pipea_force },
+ /* Intel 855GM hardware (See LP: #216490) */
+ { 0x3582, 0x1028, 0x00c8, quirk_pipea_force },
+ /* Intel 855GM hardware (See Novell Bugzilla #406123) */
+ { 0x3582, 0x10cf, 0x1215, quirk_pipea_force },
+ /* HP Pavilion ze4944ea needs pipe A force quirk (See LP: #242389) */
+ { 0x3582, 0x103c, 0x3084, quirk_pipea_force },

/* ThinkPad X30 needs pipe A force quirk (LP: #304614) */
{ 0x3577, 0x1014, 0x0513, quirk_pipea_force },
/* ThinkPad X40 needs pipe A force quirk */
+ { 0x3582, 0x1014, 0x0557, quirk_pipea_force },

/* ThinkPad T60 needs pipe A force quirk (bug #16494) */
{ 0x2782, 0x17aa, 0x201a, quirk_pipea_force },
-
- /* 855 & before need to leave pipe A & dpll A up */
- { 0x3582, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
- { 0x2562, PCI_ANY_ID, PCI_ANY_ID, quirk_pipea_force },
};

static void intel_init_quirks(struct drm_device *dev)
--
1.7.4.1






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