[PATCH v2 12/14] drm: rcar-du: Support multiple sources from the same VSP
Kieran Bingham
kieran.bingham+renesas at ideasonboard.com
Tue Aug 1 18:10:20 UTC 2017
Hi Laurent,
On 26/06/17 19:12, Laurent Pinchart wrote:
> On R-Car H3 ES2.0, DU channels 0 and 3 are served by two separate
> pipelines from the same VSP. Support this in the DU driver.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
This looks good to me.
Minor nit / comment can be safely ignored. Mostly just me thinking outload.
Reviewed-by: Kieran Bingham <kieran.bingham+renesas at ideasonboard.com>
> ---
> drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 2 +-
> drivers/gpu/drm/rcar-du/rcar_du_crtc.h | 3 ++
> drivers/gpu/drm/rcar-du/rcar_du_kms.c | 91 ++++++++++++++++++++++++++++++----
> drivers/gpu/drm/rcar-du/rcar_du_vsp.c | 37 +++++++-------
> drivers/gpu/drm/rcar-du/rcar_du_vsp.h | 10 +++-
> 5 files changed, 110 insertions(+), 33 deletions(-)
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> index 345eff72f581..8f942ebdd0c6 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
> @@ -721,7 +721,7 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int index)
> rcrtc->index = index;
>
> if (rcar_du_has(rcdu, RCAR_DU_FEATURE_VSP1_SOURCE))
> - primary = &rcrtc->vsp->planes[0].plane;
> + primary = &rcrtc->vsp->planes[rcrtc->vsp_pipe].plane;
> else
> primary = &rgrp->planes[index % 2].plane;
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
> index b199ed5adf36..0b6d26ecfc38 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
> @@ -35,6 +35,8 @@ struct rcar_du_vsp;
> * @flip_wait: wait queue used to signal page flip completion
> * @outputs: bitmask of the outputs (enum rcar_du_output) driven by this CRTC
> * @group: CRTC group this CRTC belongs to
> + * @vsp: VSP feeding video to this CRTC
> + * @vsp_pipe: index of the VSP pipeline feeding video to this CRTC
> */
> struct rcar_du_crtc {
> struct drm_crtc crtc;
> @@ -52,6 +54,7 @@ struct rcar_du_crtc {
>
> struct rcar_du_group *group;
> struct rcar_du_vsp *vsp;
> + unsigned int vsp_pipe;
> };
>
> #define to_rcar_crtc(c) container_of(c, struct rcar_du_crtc, crtc)
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> index f4125c8ca902..82b978a5dae6 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_kms.c
> @@ -432,6 +432,83 @@ static int rcar_du_properties_init(struct rcar_du_device *rcdu)
> return 0;
> }
>
> +static int rcar_du_vsps_init(struct rcar_du_device *rcdu)
> +{
> + const struct device_node *np = rcdu->dev->of_node;
> + struct of_phandle_args args;
> + struct {
> + struct device_node *np;
> + unsigned int crtcs_mask;
> + } vsps[RCAR_DU_MAX_VSPS] = { { 0, }, };
> + unsigned int vsps_count = 0;
> + unsigned int cells;
> + unsigned int i;
> + int ret;
> +
> + /*
> + * First parse the DT vsps property to populate the list of VSPs. Each
> + * entry contains a pointer to the VSP DT node and a bitmask of the
> + * connected DU CRTCs.
> + */
> + cells = of_property_count_u32_elems(np, "vsps") / rcdu->num_crtcs - 1;
> + if (cells > 1)
> + return -EINVAL;
> +
> + for (i = 0; i < rcdu->num_crtcs; ++i) {
> + unsigned int j;
> +
> + ret = of_parse_phandle_with_fixed_args(np, "vsps", cells, i,
> + &args);
> + if (ret < 0)
> + goto error;
> +
> + /*
> + * Add the VSP to the list or update the corresponding existing
> + * entry if the VSP has already been added.
> + */
> + for (j = 0; j < vsps_count; ++j) {
> + if (vsps[j].np == args.np)
> + break;
> + }
> +
> + if (j < vsps_count)
> + of_node_put(args.np);
> + else
> + vsps[vsps_count++].np = args.np;
> +
> + vsps[j].crtcs_mask |= 1 << i;
I do love the BIT(x) macro personally - but it's not important :)
> +
> + /* Store the VSP pointer and pipe index in the CRTC. */
> + rcdu->crtcs[i].vsp = &rcdu->vsps[j];
> + rcdu->crtcs[i].vsp_pipe = cells >= 1 ? args.args[0] : 0;
> + }
> +
> + /*
> + * Then initialize all the VSPs from the node pointers and CRTCs bitmask
> + * computed previously.
> + */
> + for (i = 0; i < vsps_count; ++i) {
> + struct rcar_du_vsp *vsp = &rcdu->vsps[i];
> +
> + vsp->index = i;
> + vsp->dev = rcdu;
> +
> + ret = rcar_du_vsp_init(vsp, vsps[i].np, vsps[i].crtcs_mask);
> + if (ret < 0)
> + goto error;
> + }
> +
> + return 0;
> +
> +error:
> + for (i = 0; i < ARRAY_SIZE(vsps); ++i) {
> + if (vsps[i].np)
Minor nit: of_node_put already has NULL protection so we don't need this 'if'
but it probably does make it clearer that we are only putting back nodes that we
collected.
> + of_node_put(vsps[i].np);
> + }
> +
> + return ret;
> +}
> +
> int rcar_du_modeset_init(struct rcar_du_device *rcdu)
> {
> static const unsigned int mmio_offsets[] = {
> @@ -499,17 +576,9 @@ int rcar_du_modeset_init(struct rcar_du_device *rcdu)
>
> /* Initialize the compositors. */
> if (rcar_du_has(rcdu, RCAR_DU_FEATURE_VSP1_SOURCE)) {
> - for (i = 0; i < rcdu->num_crtcs; ++i) {
> - struct rcar_du_vsp *vsp = &rcdu->vsps[i];
> -
> - vsp->index = i;
> - vsp->dev = rcdu;
> - rcdu->crtcs[i].vsp = vsp;
> -
> - ret = rcar_du_vsp_init(vsp);
> - if (ret < 0)
> - return ret;
> - }
> + ret = rcar_du_vsps_init(rcdu);
> + if (ret < 0)
> + return ret;
> }
>
> /* Create the CRTCs. */
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
> index d46dce054442..3e9098dac0d2 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.c
> @@ -19,6 +19,7 @@
> #include <drm/drm_gem_cma_helper.h>
> #include <drm/drm_plane_helper.h>
>
> +#include <linux/bitops.h>
> #include <linux/dma-mapping.h>
> #include <linux/of_platform.h>
> #include <linux/scatterlist.h>
> @@ -81,22 +82,22 @@ void rcar_du_vsp_enable(struct rcar_du_crtc *crtc)
> */
> crtc->group->need_restart = true;
>
> - vsp1_du_setup_lif(crtc->vsp->vsp, 0, &cfg);
> + vsp1_du_setup_lif(crtc->vsp->vsp, crtc->vsp_pipe, &cfg);
> }
>
> void rcar_du_vsp_disable(struct rcar_du_crtc *crtc)
> {
> - vsp1_du_setup_lif(crtc->vsp->vsp, 0, NULL);
> + vsp1_du_setup_lif(crtc->vsp->vsp, crtc->vsp_pipe, NULL);
> }
>
> void rcar_du_vsp_atomic_begin(struct rcar_du_crtc *crtc)
> {
> - vsp1_du_atomic_begin(crtc->vsp->vsp, 0);
> + vsp1_du_atomic_begin(crtc->vsp->vsp, crtc->vsp_pipe);
> }
>
> void rcar_du_vsp_atomic_flush(struct rcar_du_crtc *crtc)
> {
> - vsp1_du_atomic_flush(crtc->vsp->vsp, 0);
> + vsp1_du_atomic_flush(crtc->vsp->vsp, crtc->vsp_pipe);
> }
>
> /* Keep the two tables in sync. */
> @@ -162,6 +163,7 @@ static void rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane *plane)
> {
> struct rcar_du_vsp_plane_state *state =
> to_rcar_vsp_plane_state(plane->plane.state);
> + struct rcar_du_crtc *crtc = to_rcar_crtc(state->state.crtc);
> struct drm_framebuffer *fb = plane->plane.state->fb;
> struct vsp1_du_atomic_config cfg = {
> .pixelformat = 0,
> @@ -192,7 +194,8 @@ static void rcar_du_vsp_plane_setup(struct rcar_du_vsp_plane *plane)
> }
> }
>
> - vsp1_du_atomic_update(plane->vsp->vsp, 0, plane->index, &cfg);
> + vsp1_du_atomic_update(plane->vsp->vsp, crtc->vsp_pipe,
> + plane->index, &cfg);
> }
>
> static int rcar_du_vsp_plane_prepare_fb(struct drm_plane *plane,
> @@ -288,11 +291,13 @@ static void rcar_du_vsp_plane_atomic_update(struct drm_plane *plane,
> struct drm_plane_state *old_state)
> {
> struct rcar_du_vsp_plane *rplane = to_rcar_vsp_plane(plane);
> + struct rcar_du_crtc *crtc = to_rcar_crtc(old_state->crtc);
>
> if (plane->state->crtc)
> rcar_du_vsp_plane_setup(rplane);
> else
> - vsp1_du_atomic_update(rplane->vsp->vsp, 0, rplane->index, NULL);
> + vsp1_du_atomic_update(rplane->vsp->vsp, crtc->vsp_pipe,
> + rplane->index, NULL);
> }
>
> static const struct drm_plane_helper_funcs rcar_du_vsp_plane_helper_funcs = {
> @@ -391,23 +396,17 @@ static const struct drm_plane_funcs rcar_du_vsp_plane_funcs = {
> .atomic_get_property = rcar_du_vsp_plane_atomic_get_property,
> };
>
> -int rcar_du_vsp_init(struct rcar_du_vsp *vsp)
> +int rcar_du_vsp_init(struct rcar_du_vsp *vsp, struct device_node *np,
> + unsigned int crtcs)
> {
> struct rcar_du_device *rcdu = vsp->dev;
> struct platform_device *pdev;
> - struct device_node *np;
> + unsigned int num_crtcs = hweight32(crtcs);
Ohhh a new one to me - I didn't know we had hweight in the kernel. I think I'd
done bit-counts maually elsewhere. :S
/me updates mind wiki.
> unsigned int i;
> int ret;
>
> /* Find the VSP device and initialize it. */
> - np = of_parse_phandle(rcdu->dev->of_node, "vsps", vsp->index);
> - if (!np) {
> - dev_err(rcdu->dev, "vsps node not found\n");
> - return -ENXIO;
> - }
> -
> pdev = of_find_device_by_node(np);
> - of_node_put(np);
> if (!pdev)
> return -ENXIO;
>
> @@ -428,15 +427,15 @@ int rcar_du_vsp_init(struct rcar_du_vsp *vsp)
> return -ENOMEM;
>
> for (i = 0; i < vsp->num_planes; ++i) {
> - enum drm_plane_type type = i ? DRM_PLANE_TYPE_OVERLAY
> - : DRM_PLANE_TYPE_PRIMARY;
> + enum drm_plane_type type = i < num_crtcs
> + ? DRM_PLANE_TYPE_PRIMARY
> + : DRM_PLANE_TYPE_OVERLAY;
> struct rcar_du_vsp_plane *plane = &vsp->planes[i];
>
> plane->vsp = vsp;
> plane->index = i;
>
> - ret = drm_universal_plane_init(rcdu->ddev, &plane->plane,
> - 1 << vsp->index,
> + ret = drm_universal_plane_init(rcdu->ddev, &plane->plane, crtcs,
> &rcar_du_vsp_plane_funcs,
> formats_kms,
> ARRAY_SIZE(formats_kms), type,
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_vsp.h b/drivers/gpu/drm/rcar-du/rcar_du_vsp.h
> index 8861661590ff..f876c512163c 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_du_vsp.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_vsp.h
> @@ -64,13 +64,19 @@ to_rcar_vsp_plane_state(struct drm_plane_state *state)
> }
>
> #ifdef CONFIG_DRM_RCAR_VSP
> -int rcar_du_vsp_init(struct rcar_du_vsp *vsp);
> +int rcar_du_vsp_init(struct rcar_du_vsp *vsp, struct device_node *np,
> + unsigned int crtcs);
> void rcar_du_vsp_enable(struct rcar_du_crtc *crtc);
> void rcar_du_vsp_disable(struct rcar_du_crtc *crtc);
> void rcar_du_vsp_atomic_begin(struct rcar_du_crtc *crtc);
> void rcar_du_vsp_atomic_flush(struct rcar_du_crtc *crtc);
> #else
> -static inline int rcar_du_vsp_init(struct rcar_du_vsp *vsp) { return -ENXIO; };
> +static inline int rcar_du_vsp_init(struct rcar_du_vsp *vsp,
> + struct device_node *np,
> + unsigned int crtcs)
> +{
> + return -ENXIO;
> +}
> static inline void rcar_du_vsp_enable(struct rcar_du_crtc *crtc) { };
> static inline void rcar_du_vsp_disable(struct rcar_du_crtc *crtc) { };
> static inline void rcar_du_vsp_atomic_begin(struct rcar_du_crtc *crtc) { };
>
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