From 1ed51de9ca9170d1c5361924a17e7c483050aeb6 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Wed, 15 Jul 2015 14:15:51 +0200 Subject: [PATCH] drm/i915: Clarify logic for initial modeset Currently we both set mode->private_flags to some value and also use the pipe_config quirk. But since the pipe_config quirk isn't tied to the lifetime of the mode object we need to check both. Simplify this by only using mode.private_flags and stop using the INHERITED_MODE quirk. Also for clarity add an explicit #define for that driver priavete mode flag. By using crtc_state->mode_changed we can also remove the recalc local variable. Cc: Maarten Lankhorst Signed-off-by: Daniel Vetter Reviewed-by: Maarten Lankhorst Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_display.c | 34 ++++++++++------------------ drivers/gpu/drm/i915/intel_drv.h | 4 +++- 2 files changed, 15 insertions(+), 23 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index c29e7ed5fbb7..ce71552d4498 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -13161,7 +13161,11 @@ static int intel_atomic_check(struct drm_device *dev, for_each_crtc_in_state(state, crtc, crtc_state, i) { struct intel_crtc_state *pipe_config = to_intel_crtc_state(crtc_state); - bool modeset, recalc = false; + bool modeset; + + /* Catch I915_MODE_FLAG_INHERITED */ + if (crtc_state->mode.private_flags != crtc->state->mode.private_flags) + crtc_state->mode_changed = true; if (!crtc_state->enable) { if (needs_modeset(crtc_state)) @@ -13170,28 +13174,22 @@ static int intel_atomic_check(struct drm_device *dev, } modeset = needs_modeset(crtc_state); - /* see comment in intel_modeset_readout_hw_state */ - if (!modeset && crtc_state->mode_blob != crtc->state->mode_blob && - pipe_config->quirks & PIPE_CONFIG_QUIRK_INHERITED_MODE) - recalc = true; - if (!modeset && !recalc) + if (!modeset) continue; - if (recalc) { - ret = drm_atomic_add_affected_connectors(state, crtc); - if (ret) - return ret; - } + ret = drm_atomic_add_affected_connectors(state, crtc); + if (ret) + return ret; ret = intel_modeset_pipe_config(crtc, pipe_config); if (ret) return ret; - if (recalc && (!i915.fastboot || + if (!i915.fastboot || !intel_pipe_config_compare(state->dev, to_intel_crtc_state(crtc->state), - pipe_config, true))) { + pipe_config, true)) { modeset = crtc_state->mode_changed = true; ret = drm_atomic_add_affected_planes(state, crtc); @@ -15238,8 +15236,6 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev) memset(crtc->config, 0, sizeof(*crtc->config)); crtc->config->base.crtc = &crtc->base; - crtc->config->quirks |= PIPE_CONFIG_QUIRK_INHERITED_MODE; - crtc->active = dev_priv->display.get_pipe_config(crtc, crtc->config); @@ -15265,17 +15261,11 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev) * right now it would cause a double modeset if * fbdev or userspace chooses a different initial mode. * - * So to prevent the double modeset, fail the memcmp - * test in drm_atomic_set_mode_for_crtc to get a new - * mode blob, and compare if the mode blob changed - * when the PIPE_CONFIG_QUIRK_INHERITED_MODE quirk is - * set. - * * If that happens, someone indicated they wanted a * mode change, which means it's safe to do a full * recalculation. */ - crtc->base.state->mode.private_flags = ~0; + crtc->base.state->mode.private_flags = I915_MODE_FLAG_INHERITED; } crtc->base.hwmode = crtc->config->base.adjusted_mode; diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 0fcfa7f179c4..3b00d00c0bc0 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -317,6 +317,9 @@ struct intel_crtc_scaler_state { int scaler_id; }; +/* drm_mode->private_flags */ +#define I915_MODE_FLAG_INHERITED 1 + struct intel_crtc_state { struct drm_crtc_state base; @@ -329,7 +332,6 @@ struct intel_crtc_state { * accordingly. */ #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; /* Pipe source size (ie. panel fitter input size) -- 2.20.1