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105 lines
3.6 KiB
Diff
105 lines
3.6 KiB
Diff
From fa69b17facd1a2fd3e430b78f65b60b4a087b53d Mon Sep 17 00:00:00 2001
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From: Mario Kleiner <mario.kleiner.de@gmail.com>
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Date: Tue, 19 Jul 2016 20:58:58 +0200
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Subject: [PATCH] drm/vc4: Fix handling of interlaced video modes.
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We must not apply CRTC_INTERLACE_HALVE_V to interlaced modes during
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mode enumeration, as drm_helper_probe_single_connector_modes
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does, so wrap it and reset the effect of CRTC_INTERLACE_HALVE_V
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on affected interlaced modes.
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Also mode_fixup interlaced modes passed in from user space.
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This fixes the vblank timestamping constants and entries in
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the mode->crtc_xxx fields needed for precise vblank timestamping.
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Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
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Signed-off-by: Eric Anholt <eric@anholt.net>
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---
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drivers/gpu/drm/vc4/vc4_crtc.c | 18 ++++++++++++++++++
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drivers/gpu/drm/vc4/vc4_hdmi.c | 29 +++++++++++++++++++++++++++--
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2 files changed, 45 insertions(+), 2 deletions(-)
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--- a/drivers/gpu/drm/vc4/vc4_crtc.c
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+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
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@@ -538,6 +538,23 @@ static void vc4_crtc_enable(struct drm_c
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CRTC_READ(PV_V_CONTROL) | PV_VCONTROL_VIDEN);
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}
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+static bool vc4_crtc_mode_fixup(struct drm_crtc *crtc,
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+ const struct drm_display_mode *mode,
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+ struct drm_display_mode *adjusted_mode)
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+{
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+ /*
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+ * Interlaced video modes got CRTC_INTERLACE_HALVE_V applied when
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+ * coming from user space. We don't want this, as it screws up
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+ * vblank timestamping, so fix it up.
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+ */
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+ drm_mode_set_crtcinfo(adjusted_mode, 0);
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+
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+ DRM_DEBUG_KMS("[CRTC:%d] adjusted_mode :\n", crtc->base.id);
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+ drm_mode_debug_printmodeline(adjusted_mode);
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+
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+ return true;
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+}
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+
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static int vc4_crtc_atomic_check(struct drm_crtc *crtc,
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struct drm_crtc_state *state)
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{
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@@ -848,6 +865,7 @@ static const struct drm_crtc_helper_func
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.mode_set_nofb = vc4_crtc_mode_set_nofb,
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.disable = vc4_crtc_disable,
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.enable = vc4_crtc_enable,
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+ .mode_fixup = vc4_crtc_mode_fixup,
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.atomic_check = vc4_crtc_atomic_check,
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.atomic_flush = vc4_crtc_atomic_flush,
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};
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--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
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+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
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@@ -219,10 +219,35 @@ vc4_hdmi_connector_best_encoder(struct d
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return hdmi_connector->encoder;
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}
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+/*
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+ * drm_helper_probe_single_connector_modes() applies drm_mode_set_crtcinfo to
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+ * all modes with flag CRTC_INTERLACE_HALVE_V. We don't want this, as it
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+ * screws up vblank timestamping for interlaced modes, so fix it up.
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+ */
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+static int vc4_hdmi_connector_probe_modes(struct drm_connector *connector,
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+ uint32_t maxX, uint32_t maxY)
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+{
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+ struct drm_display_mode *mode;
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+ int count;
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+
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+ count = drm_helper_probe_single_connector_modes(connector, maxX, maxY);
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+ if (count == 0)
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+ return 0;
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+
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+ DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed adapted modes :\n",
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+ connector->base.id, connector->name);
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+ list_for_each_entry(mode, &connector->modes, head) {
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+ drm_mode_set_crtcinfo(mode, 0);
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+ drm_mode_debug_printmodeline(mode);
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+ }
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+
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+ return count;
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+}
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+
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static const struct drm_connector_funcs vc4_hdmi_connector_funcs = {
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.dpms = drm_atomic_helper_connector_dpms,
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.detect = vc4_hdmi_connector_detect,
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- .fill_modes = drm_helper_probe_single_connector_modes,
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+ .fill_modes = vc4_hdmi_connector_probe_modes,
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.destroy = vc4_hdmi_connector_destroy,
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.reset = drm_atomic_helper_connector_reset,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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@@ -258,7 +283,7 @@ static struct drm_connector *vc4_hdmi_co
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connector->polled = (DRM_CONNECTOR_POLL_CONNECT |
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DRM_CONNECTOR_POLL_DISCONNECT);
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- connector->interlace_allowed = 0;
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+ connector->interlace_allowed = 1;
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connector->doublescan_allowed = 0;
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drm_mode_connector_attach_encoder(connector, encoder);
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