From: Ville Syrjälä Date: Fri, 10 Jan 2014 12:06:45 +0000 (+0200) Subject: drm/i915: No panel fitter on 830M or non-mobile gen2/3 platforms X-Git-Tag: firefly_0821_release~176^2~4523^2~16^2~8 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=dc9e7decf13d49ff80fa690455ad89379b6b01aa;p=firefly-linux-kernel-4.4.55.git drm/i915: No panel fitter on 830M or non-mobile gen2/3 platforms PFIT_CONTROL doesn't exist on 830M, so avoid reading it in i9xx_get_pfit_config(). Also assume that only mobile gen2/3 chipsets have a panel fitter. This matches the documentation, but I didn't have real hardware to verify. Gen4 docmentation is a bit inconsistent, but experimenetation on my LPT machine suggests that the panel fitter is available on non-mobile gen4 platforms. At least on this machine panel fitter appears works just fine even on VGA output. Signed-off-by: Ville Syrjälä Reviewed-by: Chris Wilson Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index fe2d71a1c39e..db1e0a4eb359 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -5439,6 +5439,9 @@ static void i9xx_get_pfit_config(struct intel_crtc *crtc, struct drm_i915_private *dev_priv = dev->dev_private; uint32_t tmp; + if (INTEL_INFO(dev)->gen <= 3 && (IS_I830(dev) || !IS_MOBILE(dev))) + return; + tmp = I915_READ(PFIT_CONTROL); if (!(tmp & PFIT_ENABLE)) return; diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c index a98a990fbab3..a759ecdb7a6e 100644 --- a/drivers/gpu/drm/i915/intel_overlay.c +++ b/drivers/gpu/drm/i915/intel_overlay.c @@ -1005,7 +1005,7 @@ static int intel_panel_fitter_pipe(struct drm_device *dev) u32 pfit_control; /* i830 doesn't have a panel fitter */ - if (IS_I830(dev)) + if (INTEL_INFO(dev)->gen <= 3 && (IS_I830(dev) || !IS_MOBILE(dev))) return -1; pfit_control = I915_READ(PFIT_CONTROL);