From: Ville Syrjälä Date: Fri, 29 Jul 2016 14:57:02 +0000 (+0300) Subject: drm/i915: Program FW_BLC_SELF on 915G as well X-Git-Tag: Ubuntu-5.2.0-15.16~8244^2~40^2~122 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=acb913593addda42fdfd9f40d2529151b61b5b4c;p=mirror_ubuntu-eoan-kernel.git drm/i915: Program FW_BLC_SELF on 915G as well According to Bspec FW_BLC_SELF exists on 915G also. Let's program it. The only open question is whether there's is a memory self-refresh enable bit somewhere as well. For 945G/GM it's in FW_BLC_SELF, for 915GM it's in INSTPM. For 915G I can't find one in the docs. Let's drop a FIXME about this, in case someone with the hardware is ever bored enough to look for it. Cc: Daniel Vetter Cc: Chris Wilson Signed-off-by: Ville Syrjälä Link: http://patchwork.freedesktop.org/patch/msgid/1469804222-12650-2-git-send-email-ville.syrjala@linux.intel.com Reviewed-by: Chris Wilson --- diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index e2eee775da46..df02483fc755 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -340,6 +340,11 @@ void intel_set_memory_cxsr(struct drm_i915_private *dev_priv, bool enable) I915_WRITE(FW_BLC_SELF, val); POSTING_READ(FW_BLC_SELF); } else if (IS_I915GM(dev)) { + /* + * FIXME can't find a bit like this for 915G, and + * and yet it does have the related watermark in + * FW_BLC_SELF. What's going on? + */ val = enable ? _MASKED_BIT_ENABLE(INSTPM_SELF_EN) : _MASKED_BIT_DISABLE(INSTPM_SELF_EN); I915_WRITE(INSTPM, val); @@ -1621,7 +1626,7 @@ static void i9xx_update_wm(struct drm_crtc *unused_crtc) if (IS_I945G(dev) || IS_I945GM(dev)) I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_FIFO_MASK | (srwm & 0xff)); - else if (IS_I915GM(dev)) + else I915_WRITE(FW_BLC_SELF, srwm & 0x3f); }