Hi Laurent,
On Fri, 2020-12-04 at 11:19 +0200, Laurent Pinchart wrote:
Hi Philipp,
Thank you for the patch.
On Fri, Sep 11, 2020 at 03:57:19PM +0200, Philipp Zabel wrote:
Add an alternative to drm_simple_encoder_init() that allocates and initializes a simple encoder and registers drm_encoder_cleanup() with drmm_add_action_or_reset().
Signed-off-by: Philipp Zabel p.zabel@pengutronix.de
drivers/gpu/drm/drm_simple_kms_helper.c | 12 ++++++++++++ include/drm/drm_simple_kms_helper.h | 24 ++++++++++++++++++++++++ 2 files changed, 36 insertions(+)
diff --git a/drivers/gpu/drm/drm_simple_kms_helper.c b/drivers/gpu/drm/drm_simple_kms_helper.c index 74946690aba4..3cbbfb0f9b51 100644 --- a/drivers/gpu/drm/drm_simple_kms_helper.c +++ b/drivers/gpu/drm/drm_simple_kms_helper.c @@ -9,6 +9,7 @@ #include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_bridge.h> +#include <drm/drm_managed.h> #include <drm/drm_plane_helper.h> #include <drm/drm_probe_helper.h> #include <drm/drm_simple_kms_helper.h> @@ -71,6 +72,17 @@ int drm_simple_encoder_init(struct drm_device *dev, } EXPORT_SYMBOL(drm_simple_encoder_init);
+static const struct drm_encoder_funcs drmm_simple_encoder_funcs_empty = { };
+void *__drmm_simple_encoder_alloc(struct drm_device *dev, size_t size,
size_t offset, int encoder_type)+{
- return __drmm_encoder_alloc(dev, size, offset,
&drmm_simple_encoder_funcs_empty,encoder_type, NULL);+} +EXPORT_SYMBOL(__drmm_simple_encoder_alloc);
Do we need this ? Wouldn't it be better support a NULL drm_encoder_funcs in the core (if we don't already) and use drmm_encoder_alloc() directly in drivers ?
I could change it to remove the empty drm_encoder_funcs, and prepend something like this:
----------8<----------
From 12147d90a8ae48dabc16ca8750fa0f629cc46570 Mon Sep 17 00:00:00 2001
From: Philipp Zabel p.zabel@pengutronix.de Date: Fri, 4 Dec 2020 10:49:41 +0100 Subject: [PATCH] drm/encoder: make encoder control functions optional
Simple managed encoders do not require the .destroy callback, make the whole funcs structure optional.
Signed-off-by: Philipp Zabel p.zabel@pengutronix.de --- drivers/gpu/drm/drm_encoder.c | 4 ++-- drivers/gpu/drm/drm_mode_config.c | 5 +++-- include/drm/drm_encoder.h | 2 +- 3 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c index e555281f43d4..b0b86a3c08f5 100644 --- a/drivers/gpu/drm/drm_encoder.c +++ b/drivers/gpu/drm/drm_encoder.c @@ -72,7 +72,7 @@ int drm_encoder_register_all(struct drm_device *dev) int ret = 0;
drm_for_each_encoder(encoder, dev) { - if (encoder->funcs->late_register) + if (encoder->funcs && encoder->funcs->late_register) ret = encoder->funcs->late_register(encoder); if (ret) return ret; @@ -86,7 +86,7 @@ void drm_encoder_unregister_all(struct drm_device *dev) struct drm_encoder *encoder;
drm_for_each_encoder(encoder, dev) { - if (encoder->funcs->early_unregister) + if (encoder->funcs && encoder->funcs->early_unregister) encoder->funcs->early_unregister(encoder); } } diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c index f1affc1bb679..87e144155456 100644 --- a/drivers/gpu/drm/drm_mode_config.c +++ b/drivers/gpu/drm/drm_mode_config.c @@ -195,7 +195,7 @@ void drm_mode_config_reset(struct drm_device *dev) crtc->funcs->reset(crtc);
drm_for_each_encoder(encoder, dev) - if (encoder->funcs->reset) + if (encoder->funcs && encoder->funcs->reset) encoder->funcs->reset(encoder);
drm_connector_list_iter_begin(dev, &conn_iter); @@ -487,7 +487,8 @@ void drm_mode_config_cleanup(struct drm_device *dev)
list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list, head) { - encoder->funcs->destroy(encoder); + if (encoder->funcs) + encoder->funcs->destroy(encoder); }
drm_connector_list_iter_begin(dev, &conn_iter); diff --git a/include/drm/drm_encoder.h b/include/drm/drm_encoder.h index 5dfa5f7a80a7..833123637fbf 100644 --- a/include/drm/drm_encoder.h +++ b/include/drm/drm_encoder.h @@ -89,7 +89,7 @@ struct drm_encoder_funcs { * @head: list management * @base: base KMS object * @name: human readable name, can be overwritten by the driver - * @funcs: control functions + * @funcs: control functions, can be NULL for simple managed encoders * @helper_private: mid-layer private data * * CRTCs drive pixels to encoders, which convert them into signals