Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754976AbaFJTvX (ORCPT ); Tue, 10 Jun 2014 15:51:23 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:35259 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754949AbaFJTvU (ORCPT ); Tue, 10 Jun 2014 15:51:20 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Alan Stern , Daniel Vetter , Jani Nikula , Kamal Mostafa Subject: [PATCH 3.13 104/160] drm/i915: Don't check gmch state on inherited configs Date: Tue, 10 Jun 2014 12:45:44 -0700 Message-Id: <1402429600-20477-105-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1402429600-20477-1-git-send-email-kamal@canonical.com> References: <1402429600-20477-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.13 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.13.11.3 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Daniel Vetter commit 9953599bc02dbc1d3330e6a0bfc6c50e9dffcac6 upstream. ... our current modeset code isn't good enough yet to handle this. The scenario is: 1. BIOS sets up a cloned config with lvds+external screen on the same pipe, e.g. pipe B. 2. We read out that state for pipe B and assign the gmch_pfit state to it. 3. The initial modeset switches the lvds to pipe A but due to lack of atomic modeset we don't recompute the config of pipe B. -> both pipes now claim (in the sw pipe config structure) to use the gmch_pfit, which just won't work. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=74081 Tested-by: max Cc: Alan Stern Signed-off-by: Daniel Vetter Signed-off-by: Jani Nikula Signed-off-by: Kamal Mostafa --- drivers/gpu/drm/i915/intel_display.c | 23 ++++++++++++++++++----- drivers/gpu/drm/i915/intel_drv.h | 3 ++- 2 files changed, 20 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 334cf3f..10315b0 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -9125,11 +9125,22 @@ intel_pipe_config_compare(struct drm_device *dev, PIPE_CONF_CHECK_I(pipe_src_w); PIPE_CONF_CHECK_I(pipe_src_h); - PIPE_CONF_CHECK_I(gmch_pfit.control); - /* pfit ratios are autocomputed by the hw on gen4+ */ - if (INTEL_INFO(dev)->gen < 4) - PIPE_CONF_CHECK_I(gmch_pfit.pgm_ratios); - PIPE_CONF_CHECK_I(gmch_pfit.lvds_border_bits); + /* + * FIXME: BIOS likes to set up a cloned config with lvds+external + * screen. Since we don't yet re-compute the pipe config when moving + * just the lvds port away to another pipe the sw tracking won't match. + * + * Proper atomic modesets with recomputed global state will fix this. + * Until then just don't check gmch state for inherited modes. + */ + if (!PIPE_CONF_QUIRK(PIPE_CONFIG_QUIRK_INHERITED_MODE)) { + PIPE_CONF_CHECK_I(gmch_pfit.control); + /* pfit ratios are autocomputed by the hw on gen4+ */ + if (INTEL_INFO(dev)->gen < 4) + PIPE_CONF_CHECK_I(gmch_pfit.pgm_ratios); + PIPE_CONF_CHECK_I(gmch_pfit.lvds_border_bits); + } + PIPE_CONF_CHECK_I(pch_pfit.enabled); if (current_config->pch_pfit.enabled) { PIPE_CONF_CHECK_I(pch_pfit.pos); @@ -10919,6 +10930,8 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev) base.head) { memset(&crtc->config, 0, sizeof(crtc->config)); + crtc->config.quirks |= PIPE_CONFIG_QUIRK_INHERITED_MODE; + crtc->active = dev_priv->display.get_pipe_config(crtc, &crtc->config); diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 79f91f2..d6e5653 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -207,7 +207,8 @@ struct intel_crtc_config { * tracked with quirk flags so that fastboot and state checker can act * accordingly. */ -#define PIPE_CONFIG_QUIRK_MODE_SYNC_FLAGS (1<<0) /* unreliable sync mode.flags */ +#define PIPE_CONFIG_QUIRK_MODE_SYNC_FLAGS (1<<0) /* unreliable sync mode.flags */ +#define PIPE_CONFIG_QUIRK_INHERITED_MODE (1<<1) /* mode inherited from firmware */ unsigned long quirks; /* User requested mode, only valid as a starting point to -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/