3.0-stable review patch. If anyone has any objections, please let me know.
------------------ From: Eugeni Dodonov <[email protected]> commit db099c8f963fe656108e0a068274c5580a17f69b upstream. This adds the workaround for WaCatErrorRejectionIssue which could result in a system hang. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=41353 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=44610 Tested-by: Eugeni Dodonov <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]> Signed-off-by: Eugeni Dodonov <[email protected]> Signed-off-by: Jesse Barnes <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/gpu/drm/i915/i915_reg.h | 4 ++++ drivers/gpu/drm/i915/intel_display.c | 5 +++++ 2 files changed, 9 insertions(+) --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2854,6 +2854,10 @@ #define GEN7_L3_CHICKEN_MODE_REGISTER 0xB030 #define GEN7_WA_L3_CHICKEN_MODE 0x20000000 +/* WaCatErrorRejectionIssue */ +#define GEN7_SQ_CHICKEN_MBCUNIT_CONFIG 0x9030 +#define GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB (1<<11) + /* PCH */ /* south display engine interrupt */ --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7470,6 +7470,11 @@ static void ivybridge_init_clock_gating( I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, GEN7_WA_L3_CHICKEN_MODE); + /* This is required by WaCatErrorRejectionIssue */ + I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, + I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | + GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); + for_each_pipe(pipe) I915_WRITE(DSPCNTR(pipe), I915_READ(DSPCNTR(pipe)) | -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
