From 069f2b1c4e5332c7cd7fd380bd4d95772dc3509d Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun, 19 Sep 2021 10:11:53 -0700
Subject: Revert "drm/vc4: hdmi: Remove drm_encoder->crtc usage"
Git-commit: 31ad37bd6faf871c070650f72ac9488ceeeceeb0
Patch-mainline: v5.15-rc2
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
This reverts commit 27da370e0fb343a0baf308f503bb3e5dcdfe3362.
Sudip Mukherjee reports that this broke pulseaudio with a NULL pointer
dereference in vc4_hdmi_audio_prepare(), bisected it to this commit, and
confirmed that a revert fixed the problem.
Revert the problematic commit until fixed.
Link: https://lore.kernel.org/all/CADVatmPB9-oKd=ypvj25UYysVo6EZhQ6bCM7EvztQBMyiZfAyw@mail.gmail.com/
Link: https://lore.kernel.org/all/CADVatmN5EpRshGEPS_JozbFQRXg5w_8LFB3OMP1Ai-ghxd3w4g@mail.gmail.com/
Reported-and-tested-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Cc: Maxime Ripard <maxime@cerno.tech>
Cc: Emma Anholt <emma@anholt.net>
Cc: Dave Airlie <airlied@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 40 +++++++++++-----------------------
1 file changed, 13 insertions(+), 27 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 1acf64222aa3..b4b4653fe301 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -432,7 +432,7 @@ static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
struct drm_connector *connector = &vc4_hdmi->connector;
struct drm_connector_state *cstate = connector->state;
- struct drm_crtc *crtc = cstate->crtc;
+ struct drm_crtc *crtc = encoder->crtc;
const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
union hdmi_infoframe frame;
int ret;
@@ -537,11 +537,8 @@ static bool vc4_hdmi_supports_scrambling(struct drm_encoder *encoder,
static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder)
{
+ struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
- struct drm_connector *connector = &vc4_hdmi->connector;
- struct drm_connector_state *cstate = connector->state;
- struct drm_crtc *crtc = cstate->crtc;
- struct drm_display_mode *mode = &crtc->state->adjusted_mode;
if (!vc4_hdmi_supports_scrambling(encoder, mode))
return;
@@ -562,18 +559,17 @@ static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder)
static void vc4_hdmi_disable_scrambling(struct drm_encoder *encoder)
{
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
- struct drm_connector *connector = &vc4_hdmi->connector;
- struct drm_connector_state *cstate = connector->state;
+ struct drm_crtc *crtc = encoder->crtc;
/*
- * At boot, connector->state will be NULL. Since we don't know the
+ * At boot, encoder->crtc will be NULL. Since we don't know the
* state of the scrambler and in order to avoid any
* inconsistency, let's disable it all the time.
*/
- if (cstate && !vc4_hdmi_supports_scrambling(encoder, &cstate->crtc->mode))
+ if (crtc && !vc4_hdmi_supports_scrambling(encoder, &crtc->mode))
return;
- if (cstate && !vc4_hdmi_mode_needs_scrambling(&cstate->crtc->mode))
+ if (crtc && !vc4_hdmi_mode_needs_scrambling(&crtc->mode))
return;
if (delayed_work_pending(&vc4_hdmi->scrambling_work))
@@ -895,9 +891,7 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
vc4_hdmi_encoder_get_connector_state(encoder, state);
struct vc4_hdmi_connector_state *vc4_conn_state =
conn_state_to_vc4_hdmi_conn_state(conn_state);
- struct drm_crtc_state *crtc_state =
- drm_atomic_get_new_crtc_state(state, conn_state->crtc);
- struct drm_display_mode *mode = &crtc_state->adjusted_mode;
+ struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
unsigned long bvb_rate, pixel_rate, hsm_rate;
int ret;
@@ -991,11 +985,7 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
static void vc4_hdmi_encoder_pre_crtc_enable(struct drm_encoder *encoder,
struct drm_atomic_state *state)
{
- struct drm_connector_state *conn_state =
- vc4_hdmi_encoder_get_connector_state(encoder, state);
- struct drm_crtc_state *crtc_state =
- drm_atomic_get_new_crtc_state(state, conn_state->crtc);
- struct drm_display_mode *mode = &crtc_state->adjusted_mode;
+ struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
@@ -1018,11 +1008,7 @@ static void vc4_hdmi_encoder_pre_crtc_enable(struct drm_encoder *encoder,
static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder,
struct drm_atomic_state *state)
{
- struct drm_connector_state *conn_state =
- vc4_hdmi_encoder_get_connector_state(encoder, state);
- struct drm_crtc_state *crtc_state =
- drm_atomic_get_new_crtc_state(state, conn_state->crtc);
- struct drm_display_mode *mode = &crtc_state->adjusted_mode;
+ struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC;
@@ -1210,8 +1196,8 @@ static void vc4_hdmi_audio_set_mai_clock(struct vc4_hdmi *vc4_hdmi,
static void vc4_hdmi_set_n_cts(struct vc4_hdmi *vc4_hdmi, unsigned int samplerate)
{
- struct drm_connector *connector = &vc4_hdmi->connector;
- struct drm_crtc *crtc = connector->state->crtc;
+ struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base;
+ struct drm_crtc *crtc = encoder->crtc;
const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
u32 n, cts;
u64 tmp;
@@ -1244,13 +1230,13 @@ static inline struct vc4_hdmi *dai_to_hdmi(struct snd_soc_dai *dai)
static int vc4_hdmi_audio_startup(struct device *dev, void *data)
{
struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
- struct drm_connector *connector = &vc4_hdmi->connector;
+ struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base;
/*
* If the HDMI encoder hasn't probed, or the encoder is
* currently in DVI mode, treat the codec dai as missing.
*/
- if (!connector->state || !(HDMI_READ(HDMI_RAM_PACKET_CONFIG) &
+ if (!encoder->crtc || !(HDMI_READ(HDMI_RAM_PACKET_CONFIG) &
VC4_HDMI_RAM_PACKET_ENABLE))
return -ENODEV;
--
2.38.1