From 7fad798e16fecddd41c6a91728a09f0b9507e40c Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Wed, 4 Jul 2012 17:51:47 +0200 Subject: [PATCH] drm/i915: ensure the force pipe A quirk is actually followed Many BIOSen forget to turn on the pipe A after resume (because they actually don't turn on anything), so we have to do that ourselves when sanitizing the hw state. I've discovered this due to the recent addition of a pipe WARN that takes the force quirk into account. v2: Actually try to enable the pipe with a proper configuration instead of simpyl switching it on with whatever random state the bios left it in after resume. v3: Fixup rebase conflict - the load_detect functions have lost their encoder argument. Reviewed-by: Jesse Barnes Signed-Off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_display.c | 36 ++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index ad03db4b7a5b..090ba2dba696 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7602,6 +7602,33 @@ intel_connector_break_all_links(struct intel_connector *connector) connector->encoder->base.crtc = NULL; } +static void intel_enable_pipe_a(struct drm_device *dev) +{ + struct intel_connector *connector; + struct drm_connector *crt = NULL; + struct intel_load_detect_pipe load_detect_temp; + + /* We can't just switch on the pipe A, we need to set things up with a + * proper mode and output configuration. As a gross hack, enable pipe A + * by enabling the load detect pipe once. */ + list_for_each_entry(connector, + &dev->mode_config.connector_list, + base.head) { + if (connector->encoder->type == INTEL_OUTPUT_ANALOG) { + crt = &connector->base; + break; + } + } + + if (!crt) + return; + + if (intel_get_load_detect_pipe(crt, NULL, &load_detect_temp)) + intel_release_load_detect_pipe(crt, &load_detect_temp); + + +} + static void intel_sanitize_crtc(struct intel_crtc *crtc) { struct drm_device *dev = crtc->base.dev; @@ -7650,6 +7677,15 @@ static void intel_sanitize_crtc(struct intel_crtc *crtc) } ok: + if (dev_priv->quirks & QUIRK_PIPEA_FORCE && + crtc->pipe == PIPE_A && !crtc->active) { + /* BIOS forgot to enable pipe A, this mostly happens after + * resume. Force-enable the pipe to fix this, the update_dpms + * call below we restore the pipe to the right state, but leave + * the required bits on. */ + intel_enable_pipe_a(dev); + } + /* Adjust the state of the output pipe according to whether we * have active connectors/encoders. */ intel_crtc_update_dpms(&crtc->base); -- 2.39.5