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Date: Sun, 12 May 2019 16:55:42 +0300
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
Cc: linux-renesas-soc@...r.kernel.org, dri-devel@...ts.freedesktop.org,
David Airlie <airlied@...ux.ie>,
open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 5/6] drm: rcar-du: Create a group state object
Hi Kieran,
Thank you for the patch.
On Fri, Mar 15, 2019 at 05:01:09PM +0000, Kieran Bingham wrote:
> Create a new private state object for the DU groups, and move the
> initialisation of a group object to a new function rcar_du_group_init().
>
> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
> ---
> v2:
> - No change
>
> drivers/gpu/drm/rcar-du/rcar_du_group.c | 81 +++++++++++++++++++++++++
> drivers/gpu/drm/rcar-du/rcar_du_group.h | 22 +++++++
> drivers/gpu/drm/rcar-du/rcar_du_kms.c | 27 ++-------
> 3 files changed, 107 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c b/drivers/gpu/drm/rcar-du/rcar_du_group.c
> index 9eee47969e77..9c82d666f170 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_group.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_group.c
> @@ -26,6 +26,10 @@
> #include <linux/clk.h>
> #include <linux/io.h>
Please include <linux/slab.h> for kzalloc() and kfree().
>
> +#include <drm/drm_atomic.h>
> +#include <drm/drm_atomic_state_helper.h>
> +#include <drm/drm_device.h>
> +
> #include "rcar_du_drv.h"
> #include "rcar_du_group.h"
> #include "rcar_du_regs.h"
> @@ -351,3 +355,80 @@ int rcar_du_group_set_routing(struct rcar_du_group *rgrp)
>
> return rcar_du_set_dpad0_vsp1_routing(rgrp->dev);
> }
> +
> +static struct drm_private_state *
> +rcar_du_group_atomic_duplicate_state(struct drm_private_obj *obj)
> +{
> + struct rcar_du_group_state *state;
> +
> + if (WARN_ON(!obj->state))
> + return NULL;
> +
> + state = kzalloc(sizeof(*state), GFP_KERNEL);
> + if (state == NULL)
> + return NULL;
> +
> + __drm_atomic_helper_private_obj_duplicate_state(obj, &state->state);
> +
> + return &state->state;
> +}
> +
> +static void rcar_du_group_atomic_destroy_state(struct drm_private_obj *obj,
> + struct drm_private_state *state)
> +{
> + kfree(to_rcar_group_state(state));
> +}
> +
> +static const struct drm_private_state_funcs rcar_du_group_state_funcs = {
> + .atomic_duplicate_state = rcar_du_group_atomic_duplicate_state,
> + .atomic_destroy_state = rcar_du_group_atomic_destroy_state,
> +};
> +
> +/*
> + * rcar_du_group_init - Initialise and reset a group object
> + *
> + * Return 0 in case of success or a negative error code otherwise.
> + */
> +int rcar_du_group_init(struct rcar_du_device *rcdu, struct rcar_du_group *rgrp,
> + unsigned int index)
> +{
> + static const unsigned int mmio_offsets[] = {
> + DU0_REG_OFFSET, DU2_REG_OFFSET
> + };
> +
> + struct rcar_du_group_state *state;
> +
> + state = kzalloc(sizeof(*state), GFP_KERNEL);
> + if (!state)
> + return -ENOMEM;
> +
> + drm_atomic_private_obj_init(rcdu->ddev, &rgrp->private, &state->state,
> + &rcar_du_group_state_funcs);
> +
> + mutex_init(&rgrp->lock);
> +
> + rgrp->dev = rcdu;
> + rgrp->mmio_offset = mmio_offsets[index];
> + rgrp->index = index;
> + /* Extract the channel mask for this group only. */
> + rgrp->channels_mask = (rcdu->info->channels_mask >> (2 * index))
> + & GENMASK(1, 0);
> + rgrp->num_crtcs = hweight8(rgrp->channels_mask);
> +
> + /*
> + * If we have more than one CRTC in this group pre-associate
> + * the low-order planes with CRTC 0 and the high-order planes
> + * with CRTC 1 to minimize flicker occurring when the
> + * association is changed.
> + */
> + rgrp->dptsr_planes = rgrp->num_crtcs > 1
> + ? (rcdu->info->gen >= 3 ? 0x04 : 0xf0)
> + : 0;
> +
> + return 0;
> +}
> +
> +void rcar_du_group_cleanup(struct rcar_du_group *rgrp)
> +{
I would add a mutex_cleanup(&rgrp->lock) here. Apart from that,
Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> + drm_atomic_private_obj_fini(&rgrp->private);
> +}
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.h b/drivers/gpu/drm/rcar-du/rcar_du_group.h
> index 87950c1f6a52..4b812e167987 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_group.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_group.h
> @@ -12,12 +12,15 @@
>
> #include <linux/mutex.h>
>
> +#include <drm/drm_atomic.h>
> +
> #include "rcar_du_plane.h"
>
> struct rcar_du_device;
>
> /*
> * struct rcar_du_group - CRTCs and planes group
> + * @private: The base drm private object
> * @dev: the DU device
> * @mmio_offset: registers offset in the device memory map
> * @index: group index
> @@ -32,6 +35,8 @@ struct rcar_du_device;
> * @need_restart: the group needs to be restarted due to a configuration change
> */
> struct rcar_du_group {
> + struct drm_private_obj private;
> +
> struct rcar_du_device *dev;
> unsigned int mmio_offset;
> unsigned int index;
> @@ -49,6 +54,19 @@ struct rcar_du_group {
> bool need_restart;
> };
>
> +#define to_rcar_group(s) container_of(s, struct rcar_du_group, private)
> +
> +/**
> + * struct rcar_du_group_state - Driver-specific group state
> + * @state: base DRM private state
> + */
> +struct rcar_du_group_state {
> + struct drm_private_state state;
> +};
> +
> +#define to_rcar_group_state(s) \
> + container_of(s, struct rcar_du_group_state, state)
> +
> u32 rcar_du_group_read(struct rcar_du_group *rgrp, u32 reg);
> void rcar_du_group_write(struct rcar_du_group *rgrp, u32 reg, u32 data);
>
> @@ -60,4 +78,8 @@ int rcar_du_group_set_routing(struct rcar_du_group *rgrp);
>
> int rcar_du_set_dpad0_vsp1_routing(struct rcar_du_device *rcdu);
>
> +int rcar_du_group_init(struct rcar_du_device *rcdu, struct rcar_du_group *rgrp,
> + unsigned int index);
> +void rcar_du_group_cleanup(struct rcar_du_group *rgrp);
> +
> #endif /* __RCAR_DU_GROUP_H__ */
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> index ece92cff2137..eb01bea1ab83 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> @@ -23,6 +23,7 @@
> #include "rcar_du_crtc.h"
> #include "rcar_du_drv.h"
> #include "rcar_du_encoder.h"
> +#include "rcar_du_group.h"
> #include "rcar_du_kms.h"
> #include "rcar_du_regs.h"
> #include "rcar_du_vsp.h"
> @@ -516,10 +517,6 @@ static int rcar_du_vsps_init(struct rcar_du_device *rcdu)
>
> int rcar_du_modeset_init(struct rcar_du_device *rcdu)
> {
> - static const unsigned int mmio_offsets[] = {
> - DU0_REG_OFFSET, DU2_REG_OFFSET
> - };
> -
> struct drm_device *dev = rcdu->ddev;
> struct drm_encoder *encoder;
> struct rcar_du_group *rgrp;
> @@ -566,25 +563,9 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
>
> /* Initialize the groups. */
> for_each_rcdu_group(rcdu, rgrp, i) {
> - mutex_init(&rgrp->lock);
> -
> - rgrp->dev = rcdu;
> - rgrp->mmio_offset = mmio_offsets[i];
> - rgrp->index = i;
> - /* Extract the channel mask for this group only. */
> - rgrp->channels_mask = (rcdu->info->channels_mask >> (2 * i))
> - & GENMASK(1, 0);
> - rgrp->num_crtcs = hweight8(rgrp->channels_mask);
> -
> - /*
> - * If we have more than one CRTCs in this group pre-associate
> - * the low-order planes with CRTC 0 and the high-order planes
> - * with CRTC 1 to minimize flicker occurring when the
> - * association is changed.
> - */
> - rgrp->dptsr_planes = rgrp->num_crtcs > 1
> - ? (rcdu->info->gen >= 3 ? 0x04 : 0xf0)
> - : 0;
> + ret = rcar_du_group_init(rcdu, rgrp, i);
> + if (ret < 0)
> + return ret;
>
> if (!rcar_du_has(rcdu, RCAR_DU_FEATURE_VSP1_SOURCE)) {
> ret = rcar_du_planes_init(rgrp);
--
Regards,
Laurent Pinchart
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