From dd8849c8f59ec1cee4809a0c5e603e045abe860e Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Thu, 9 Sep 2010 11:58:02 -0700 Subject: [PATCH] drm/i915: don't enable self-refresh on Ironlake We don't know how to enable it safely, especially as outputs turn on and off. When disabling LP1 we also need to make sure LP2 and 3 are already disabled. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=29173 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=29082 Reported-by: Chris Lord Signed-off-by: Jesse Barnes Tested-by: Daniel Vetter Cc: stable@kernel.org Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/i915_reg.h | 8 ++++++++ drivers/gpu/drm/i915/intel_display.c | 6 ++++-- 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index d094e9129223..4f5e15577e89 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2206,9 +2206,17 @@ #define WM1_LP_SR_EN (1<<31) #define WM1_LP_LATENCY_SHIFT 24 #define WM1_LP_LATENCY_MASK (0x7f<<24) +#define WM1_LP_FBC_LP1_MASK (0xf<<20) +#define WM1_LP_FBC_LP1_SHIFT 20 #define WM1_LP_SR_MASK (0x1ff<<8) #define WM1_LP_SR_SHIFT 8 #define WM1_LP_CURSOR_MASK (0x3f) +#define WM2_LP_ILK 0x4510c +#define WM2_LP_EN (1<<31) +#define WM3_LP_ILK 0x45110 +#define WM3_LP_EN (1<<31) +#define WM1S_LP_ILK 0x45120 +#define WM1S_LP_EN (1<<31) /* Memory latency timer register */ #define MLTR_ILK 0x11222 diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 7c9103030036..19daead5b525 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3382,8 +3382,7 @@ static void ironlake_update_wm(struct drm_device *dev, int planea_clock, reg_value = I915_READ(WM1_LP_ILK); reg_value &= ~(WM1_LP_LATENCY_MASK | WM1_LP_SR_MASK | WM1_LP_CURSOR_MASK); - reg_value |= WM1_LP_SR_EN | - (ilk_sr_latency << WM1_LP_LATENCY_SHIFT) | + reg_value |= (ilk_sr_latency << WM1_LP_LATENCY_SHIFT) | (sr_wm << WM1_LP_SR_SHIFT) | cursor_wm; I915_WRITE(WM1_LP_ILK, reg_value); @@ -5669,6 +5668,9 @@ void intel_init_clock_gating(struct drm_device *dev) I915_WRITE(DISP_ARB_CTL, (I915_READ(DISP_ARB_CTL) | DISP_FBC_WM_DIS)); + I915_WRITE(WM3_LP_ILK, 0); + I915_WRITE(WM2_LP_ILK, 0); + I915_WRITE(WM1_LP_ILK, 0); } /* * Based on the document from hardware guys the following bits -- 2.20.1