From: Weinan Li Date: Fri, 17 Mar 2017 01:38:57 +0000 (+0800) Subject: drm/i915/gvt: emulate SKL_FUSE_STATUS and LCPLL_CTL for virtual monitor detection X-Git-Tag: v4.12-rc1~116^2~13^2~18^2~17 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=88a16b64c3f48d1c7c2b12f1632ba2181eb502de;p=linux.git drm/i915/gvt: emulate SKL_FUSE_STATUS and LCPLL_CTL for virtual monitor detection Initialize the correct vreg for virtual monitor. Set PG0/1/2 distribution and fuse download done in SKL_FUSE_STATUS. Set PLL_ENABLE and PLL_LOCK in LCPLL_CTL. Guest may need to check these registers for display monitor detection on Skylake platforms. Signed-off-by: Weinan Li Signed-off-by: Zhenyu Wang --- diff --git a/drivers/gpu/drm/i915/gvt/display.c b/drivers/gpu/drm/i915/gvt/display.c index 5419ae6ec633..79939f93464d 100644 --- a/drivers/gpu/drm/i915/gvt/display.c +++ b/drivers/gpu/drm/i915/gvt/display.c @@ -172,9 +172,20 @@ static void emulate_monitor_status_change(struct intel_vgpu *vgpu) SDE_PORTC_HOTPLUG_CPT | SDE_PORTD_HOTPLUG_CPT); - if (IS_SKYLAKE(dev_priv)) + if (IS_SKYLAKE(dev_priv)) { vgpu_vreg(vgpu, SDEISR) &= ~(SDE_PORTA_HOTPLUG_SPT | SDE_PORTE_HOTPLUG_SPT); + vgpu_vreg(vgpu, SKL_FUSE_STATUS) |= + SKL_FUSE_DOWNLOAD_STATUS | + SKL_FUSE_PG0_DIST_STATUS | + SKL_FUSE_PG1_DIST_STATUS | + SKL_FUSE_PG2_DIST_STATUS; + vgpu_vreg(vgpu, LCPLL1_CTL) |= + LCPLL_PLL_ENABLE | + LCPLL_PLL_LOCK; + vgpu_vreg(vgpu, LCPLL2_CTL) |= LCPLL_PLL_ENABLE; + + } if (intel_vgpu_has_monitor_on_port(vgpu, PORT_B)) { vgpu_vreg(vgpu, SDEISR) |= SDE_PORTB_HOTPLUG_CPT;