From 0eaa53f021847eec5b759843e0cb195322c26896 Mon Sep 17 00:00:00 2001 From: Rodrigo Vivi Date: Mon, 30 Jun 2014 04:45:01 -0700 Subject: [PATCH] drm/i915: Don't pretend ips is always enabled on BDW. As pointed out before we don't have a reliable way to read back ips status on BDW without the risk to disable it when reading. However now we are pretending that IPS on BDW is always on and getting people confused about it. So this patch allows people to know if ips was ever attempted to be enabled. Even if the current status is impossible to be ascertain. v2: (spotted by Paulo): * A version that at least compiles * with more clear messages * let Cheryview on the safe side until we aren't sure that checking ips state on ips won't disable it. Cc: Paulo Zanoni Signed-off-by: Rodrigo Vivi Reviewed-by: Paulo Zanoni Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_debugfs.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 8da998561b35..8cc99369c794 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -1523,10 +1523,17 @@ static int i915_ips_status(struct seq_file *m, void *unused) intel_runtime_pm_get(dev_priv); - if (IS_BROADWELL(dev) || I915_READ(IPS_CTL) & IPS_ENABLE) - seq_puts(m, "enabled\n"); - else - seq_puts(m, "disabled\n"); + seq_printf(m, "Enabled by kernel parameter: %s\n", + yesno(i915.enable_ips)); + + if (INTEL_INFO(dev)->gen >= 8) { + seq_puts(m, "Currently: unknown\n"); + } else { + if (I915_READ(IPS_CTL) & IPS_ENABLE) + seq_puts(m, "Currently: enabled\n"); + else + seq_puts(m, "Currently: disabled\n"); + } intel_runtime_pm_put(dev_priv); -- 2.30.2