From: Maxime Ripard <maxime@cerno.tech>
To: dri-devel@lists.freedesktop.org,
Daniel Vetter <daniel.vetter@intel.com>,
David Airlie <airlied@linux.ie>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Thomas Zimmermann <tzimmermann@suse.de>,
Maxime Ripard <maxime@cerno.tech>
Cc: linux-rpi-kernel@lists.infradead.org,
Maxime Ripard <mripard@kernel.org>,
Nicolas Saenz Julienne <nsaenz@kernel.org>,
Dave Stevenson <dave.stevenson@raspberrypi.com>,
Phil Elwell <phil@raspberrypi.com>,
Tim Gover <tim.gover@raspberrypi.com>,
Dom Cobley <dom@raspberrypi.com>, Emma Anholt <emma@anholt.net>,
bcm-kernel-feedback-list@broadcom.com,
linux-kernel@vger.kernel.org
Subject: [PATCH v6 05/10] drm/vc4: crtc: Rework the encoder retrieval code (again)
Date: Wed, 7 Jul 2021 10:47:40 +0200 [thread overview]
Message-ID: <20210707084745.1365390-6-maxime@cerno.tech> (raw)
In-Reply-To: <20210707084745.1365390-1-maxime@cerno.tech>
It turns out the encoder retrieval code, in addition to being
unnecessarily complicated, has a bug when only the planes and crtcs are
affected by a given atomic commit.
Indeed, in such a case, either drm_atomic_get_old_connector_state or
drm_atomic_get_new_connector_state will return NULL and thus our encoder
retrieval code will not match on anything.
We can however simplify the code by using drm_for_each_encoder_mask, the
drm_crtc_state storing the encoders a given CRTC is connected to
directly and without relying on any other state.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
drivers/gpu/drm/vc4/vc4_crtc.c | 30 +++++++++---------------------
drivers/gpu/drm/vc4/vc4_drv.h | 4 +---
2 files changed, 10 insertions(+), 24 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c
index 93d2413d0842..c88ce31ec90f 100644
--- a/drivers/gpu/drm/vc4/vc4_crtc.c
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
@@ -280,26 +280,14 @@ static u32 vc4_crtc_get_fifo_full_level_bits(struct vc4_crtc *vc4_crtc,
* same CRTC.
*/
struct drm_encoder *vc4_get_crtc_encoder(struct drm_crtc *crtc,
- struct drm_atomic_state *state,
- struct drm_connector_state *(*get_state)(struct drm_atomic_state *state,
- struct drm_connector *connector))
+ struct drm_crtc_state *state)
{
- struct drm_connector *connector;
- struct drm_connector_list_iter conn_iter;
+ struct drm_encoder *encoder;
- drm_connector_list_iter_begin(crtc->dev, &conn_iter);
- drm_for_each_connector_iter(connector, &conn_iter) {
- struct drm_connector_state *conn_state = get_state(state, connector);
+ WARN_ON(hweight32(state->encoder_mask) > 1);
- if (!conn_state)
- continue;
-
- if (conn_state->crtc == crtc) {
- drm_connector_list_iter_end(&conn_iter);
- return connector->encoder;
- }
- }
- drm_connector_list_iter_end(&conn_iter);
+ drm_for_each_encoder_mask(encoder, crtc->dev, state->encoder_mask)
+ return encoder;
return NULL;
}
@@ -533,8 +521,7 @@ static void vc4_crtc_atomic_disable(struct drm_crtc *crtc,
struct drm_crtc_state *old_state = drm_atomic_get_old_crtc_state(state,
crtc);
struct vc4_crtc_state *old_vc4_state = to_vc4_crtc_state(old_state);
- struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc, state,
- drm_atomic_get_old_connector_state);
+ struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc, old_state);
struct drm_device *dev = crtc->dev;
require_hvs_enabled(dev);
@@ -561,10 +548,11 @@ static void vc4_crtc_atomic_disable(struct drm_crtc *crtc,
static void vc4_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
+ struct drm_crtc_state *new_state = drm_atomic_get_new_crtc_state(state,
+ crtc);
struct drm_device *dev = crtc->dev;
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
- struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc, state,
- drm_atomic_get_new_connector_state);
+ struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc, new_state);
struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder);
require_hvs_enabled(dev);
diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h
index d3e5238eadb5..52214a1568fe 100644
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -516,9 +516,7 @@ vc4_crtc_to_vc4_pv_data(const struct vc4_crtc *crtc)
}
struct drm_encoder *vc4_get_crtc_encoder(struct drm_crtc *crtc,
- struct drm_atomic_state *state,
- struct drm_connector_state *(*get_state)(struct drm_atomic_state *state,
- struct drm_connector *connector));
+ struct drm_crtc_state *state);
struct vc4_crtc_state {
struct drm_crtc_state base;
--
2.31.1
next prev parent reply other threads:[~2021-07-07 8:48 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-07 8:47 [PATCH v6 00/10] drm/vc4: hdmi: Support the 4k @ 60Hz modes Maxime Ripard
2021-07-07 8:47 ` [PATCH v6 01/10] drm/vc4: hdmi: Remove the DDC probing for status detection Maxime Ripard
2021-07-07 8:47 ` [PATCH v6 02/10] drm/vc4: hdmi: Fix HPD GPIO detection Maxime Ripard
2021-07-07 8:47 ` [PATCH v6 03/10] drm/vc4: Make vc4_crtc_get_encoder public Maxime Ripard
2021-07-07 8:47 ` [PATCH v6 04/10] drm/vc4: crtc: Add encoder to vc4_crtc_config_pv prototype Maxime Ripard
2021-07-07 8:47 ` Maxime Ripard [this message]
2021-07-07 8:47 ` [PATCH v6 06/10] drm/vc4: crtc: Add some logging Maxime Ripard
2021-07-07 8:47 ` [PATCH v6 07/10] drm/vc4: Leverage the load tracker on the BCM2711 Maxime Ripard
2021-07-07 8:47 ` [PATCH v6 08/10] drm/vc4: hdmi: Raise the maximum clock rate Maxime Ripard
2021-07-07 8:47 ` [PATCH v6 09/10] drm/vc4: hdmi: Enable the scrambler on reconnection Maxime Ripard
2021-07-07 8:47 ` [PATCH v6 10/10] drm/vc4: Increase the core clock based on HVS load Maxime Ripard
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