From b708a1d5ea7880b399dbd45cacafff6ae8d73171 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Mon, 11 Jun 2012 14:39:56 -0400 Subject: [PATCH 1/4] drm/i915: don't enumerate HDMID if an eDP panel is already active on the port This prevents the HDMI detect functions from poking at an eDP connected panel, which can lead to trouble. [danvet: Note that we have some other reports of DP vs. HDMI fighting, but the general case is a much bigger fish to fry.] References: https://bugs.freedesktop.org/show_bug.cgi?id=42278 Signed-off-by: Jesse Barnes Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_display.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index e0aa064def31..a7c727d0c105 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -6558,7 +6558,7 @@ static void intel_setup_outputs(struct drm_device *dev) if (I915_READ(HDMIC) & PORT_DETECTED) intel_hdmi_init(dev, HDMIC); - if (I915_READ(HDMID) & PORT_DETECTED) + if (!dpd_is_edp && I915_READ(HDMID) & PORT_DETECTED) intel_hdmi_init(dev, HDMID); if (I915_READ(PCH_DP_C) & DP_DETECTED) From 351cfc34db8decb0c5cc1aac7cf1780a0e45c8b1 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Tue, 12 Jun 2012 13:20:47 +0200 Subject: [PATCH 2/4] drm/i915: eDP aux needs vdd The new oui probe has been missing these. This issue has been introduce in commit 0d198328538276c4459ef5de081e68ae60e6c4c2 Author: Adam Jackson Date: Mon May 14 16:05:47 2012 -0400 drm/i915/dp: Probe branch/sink OUIs v2: Do the eDP vdd dance of simply not probing the OUI on eDP panels as suggested by Chris Wilson. v3: Fix up the error path fail - I suck. Cc: Adam Jackson Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=50808 Reported-by: Linus Torvalds Bugreport: http://permalink.gmane.org/gmane.comp.video.dri.devel/69695 Tested-by: Yang Guang Reviewed-by: Jesse Barnes Signed-Off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_dp.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 296cfc201a81..c574ff0189de 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1973,6 +1973,8 @@ intel_dp_probe_oui(struct intel_dp *intel_dp) if (!(intel_dp->dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT)) return; + ironlake_edp_panel_vdd_on(intel_dp); + if (intel_dp_aux_native_read_retry(intel_dp, DP_SINK_OUI, buf, 3)) DRM_DEBUG_KMS("Sink OUI: %02hx%02hx%02hx\n", buf[0], buf[1], buf[2]); @@ -1980,6 +1982,8 @@ intel_dp_probe_oui(struct intel_dp *intel_dp) if (intel_dp_aux_native_read_retry(intel_dp, DP_BRANCH_OUI, buf, 3)) DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n", buf[0], buf[1], buf[2]); + + ironlake_edp_panel_vdd_off(intel_dp, false); } static bool From 6b4e0a93ff6e45714c72bdce193f719ed94810e3 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Thu, 14 Jun 2012 22:15:00 +0200 Subject: [PATCH 3/4] Revert "drm/i915/dp: Use auxch precharge value of 5 everywhere" This reverts commit 092945e11c5b84f66dd08f0b87fb729715d377bc. This commit prevents a DP screen from properly training the link. Oddly enough it works, once the machine has been warm-booted with an older kernel. According to DP docs this _should_ have been the right precharge time. Also, the commit that originally introduces this was just general snb DP enabling and didn't mention any specific reason for this special value. Whatever, trust the reporter that this makes things worse and let's just revert it. v2: Less spelling fail. Cc: Adam Jackson Cc: Jesse Barnes Reported-by: "Wouter M. Koolen" Buglink: https://lkml.org/lkml/2012/6/14/301 Cc: stable@vger.kernel.org (only for 3.4) Signed-Off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_dp.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index c574ff0189de..a4b3887575a1 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -371,7 +371,7 @@ intel_dp_aux_ch(struct intel_dp *intel_dp, int recv_bytes; uint32_t status; uint32_t aux_clock_divider; - int try, precharge = 5; + int try, precharge; intel_dp_check_edp(intel_dp); /* The clock divider is based off the hrawclk, @@ -391,6 +391,11 @@ intel_dp_aux_ch(struct intel_dp *intel_dp, else aux_clock_divider = intel_hrawclk(dev) / 2; + if (IS_GEN6(dev)) + precharge = 3; + else + precharge = 5; + /* Try to wait for any previous AUX channel activity */ for (try = 0; try < 3; try++) { status = I915_READ(ch_ctl); From d6f24d0fa6cdf3431a2fe3330a74bc6c5871f496 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Thu, 14 Jun 2012 15:28:33 -0400 Subject: [PATCH 4/4] drm/i915: cache the EDID for eDP panels They aren't going anywhere, and probing on DDC can cause the panel to blank briefly, so read them up front and cache them for later queries. v2: fix potential NULL derefs in intel_dp_get_edid_modes and intel_dp_get_edid (Jani) copy full EDID length, including extension blocks (Takashi) free EDID on teardown (Takashi) v3: malloc a new EDID buffer that's big enough for the memcpy (Chris) v4: change handling of NULL EDIDs, just preserve the NULL behavior across detects and mode list fetches rather than trying to re-fetch the EDID (Chris) v5: be glad that Chris is around to remind me to hit C-x C-s before committing. References: https://bugs.freedesktop.org/show_bug.cgi?id=46856 Signed-off-by: Jesse Barnes Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_dp.c | 49 +++++++++++++++++++++++++++++---- 1 file changed, 43 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index a4b3887575a1..c0449324143c 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -32,6 +32,7 @@ #include "drm.h" #include "drm_crtc.h" #include "drm_crtc_helper.h" +#include "drm_edid.h" #include "intel_drv.h" #include "i915_drm.h" #include "i915_drv.h" @@ -67,6 +68,8 @@ struct intel_dp { struct drm_display_mode *panel_fixed_mode; /* for eDP */ struct delayed_work panel_vdd_work; bool want_panel_vdd; + struct edid *edid; /* cached EDID for eDP */ + int edid_mode_count; }; /** @@ -2125,10 +2128,22 @@ intel_dp_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) { struct intel_dp *intel_dp = intel_attached_dp(connector); struct edid *edid; + int size; + + if (is_edp(intel_dp)) { + if (!intel_dp->edid) + return NULL; + + size = (intel_dp->edid->extensions + 1) * EDID_LENGTH; + edid = kmalloc(size, GFP_KERNEL); + if (!edid) + return NULL; + + memcpy(edid, intel_dp->edid, size); + return edid; + } - ironlake_edp_panel_vdd_on(intel_dp); edid = drm_get_edid(connector, adapter); - ironlake_edp_panel_vdd_off(intel_dp, false); return edid; } @@ -2138,9 +2153,17 @@ intel_dp_get_edid_modes(struct drm_connector *connector, struct i2c_adapter *ada struct intel_dp *intel_dp = intel_attached_dp(connector); int ret; - ironlake_edp_panel_vdd_on(intel_dp); + if (is_edp(intel_dp)) { + drm_mode_connector_update_edid_property(connector, + intel_dp->edid); + ret = drm_add_edid_modes(connector, intel_dp->edid); + drm_edid_to_eld(connector, + intel_dp->edid); + connector->display_info.raw_edid = NULL; + return intel_dp->edid_mode_count; + } + ret = intel_ddc_get_modes(connector, adapter); - ironlake_edp_panel_vdd_off(intel_dp, false); return ret; } @@ -2330,6 +2353,7 @@ static void intel_dp_encoder_destroy(struct drm_encoder *encoder) i2c_del_adapter(&intel_dp->adapter); drm_encoder_cleanup(encoder); if (is_edp(intel_dp)) { + kfree(intel_dp->edid); cancel_delayed_work_sync(&intel_dp->panel_vdd_work); ironlake_panel_vdd_off_sync(intel_dp); } @@ -2513,11 +2537,14 @@ intel_dp_init(struct drm_device *dev, int output_reg) break; } + intel_dp_i2c_init(intel_dp, intel_connector, name); + /* Cache some DPCD data in the eDP case */ if (is_edp(intel_dp)) { bool ret; struct edp_power_seq cur, vbt; u32 pp_on, pp_off, pp_div; + struct edid *edid; pp_on = I915_READ(PCH_PP_ON_DELAYS); pp_off = I915_READ(PCH_PP_OFF_DELAYS); @@ -2585,9 +2612,19 @@ intel_dp_init(struct drm_device *dev, int output_reg) intel_dp_destroy(&intel_connector->base); return; } - } - intel_dp_i2c_init(intel_dp, intel_connector, name); + ironlake_edp_panel_vdd_on(intel_dp); + edid = drm_get_edid(connector, &intel_dp->adapter); + if (edid) { + drm_mode_connector_update_edid_property(connector, + edid); + intel_dp->edid_mode_count = + drm_add_edid_modes(connector, edid); + drm_edid_to_eld(connector, edid); + intel_dp->edid = edid; + } + ironlake_edp_panel_vdd_off(intel_dp, false); + } intel_encoder->hot_plug = intel_dp_hot_plug;