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Message-ID: <bdff1794-f3eb-4845-a73a-0b76d2759eec@ideasonboard.com>
Date: Wed, 17 Apr 2024 13:30:14 +0300
From: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To: Anatoliy Klymenko <anatoliy.klymenko@....com>
Cc: dri-devel@...ts.freedesktop.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
linux-media@...r.kernel.org,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
Michal Simek <michal.simek@....com>, Andrzej Hajda
<andrzej.hajda@...el.com>, Neil Armstrong <neil.armstrong@...aro.org>,
Robert Foss <rfoss@...nel.org>, Jonas Karlman <jonas@...boo.se>,
Jernej Skrabec <jernej.skrabec@...il.com>, Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Mauro Carvalho Chehab <mchehab@...nel.org>
Subject: Re: [PATCH v4 6/7] drm: xlnx: zynqmp_dpsub: Set input live format
On 16/04/2024 23:31, Anatoliy Klymenko wrote:
> Program live video input format according to selected media bus format.
>
> In the bridge mode of operation, DPSUB is connected to FPGA CRTC which
> almost certainly supports a single media bus format as its output. Expect
> this to be delivered via the new bridge atomic state. Program DPSUB
> registers accordingly.
>
> Signed-off-by: Anatoliy Klymenko <anatoliy.klymenko@....com>
> ---
> drivers/gpu/drm/xlnx/zynqmp_disp.c | 92 ++++++++++++++++++++++++++++++++------
> drivers/gpu/drm/xlnx/zynqmp_disp.h | 2 +
> drivers/gpu/drm/xlnx/zynqmp_dp.c | 13 ++++--
> 3 files changed, 90 insertions(+), 17 deletions(-)
>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Tomi
> diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
> index 8cdd74a9b772..13157da0089e 100644
> --- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
> +++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
> @@ -436,19 +436,29 @@ static void zynqmp_disp_avbuf_set_format(struct zynqmp_disp *disp,
> const struct zynqmp_disp_format *fmt)
> {
> unsigned int i;
> - u32 val;
> + u32 val, reg;
>
> - val = zynqmp_disp_avbuf_read(disp, ZYNQMP_DISP_AV_BUF_FMT);
> - val &= zynqmp_disp_layer_is_video(layer)
> - ? ~ZYNQMP_DISP_AV_BUF_FMT_NL_VID_MASK
> - : ~ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_MASK;
> - val |= fmt->buf_fmt;
> - zynqmp_disp_avbuf_write(disp, ZYNQMP_DISP_AV_BUF_FMT, val);
> + layer->disp_fmt = fmt;
> + if (layer->mode == ZYNQMP_DPSUB_LAYER_NONLIVE) {
> + reg = ZYNQMP_DISP_AV_BUF_FMT;
> + val = zynqmp_disp_avbuf_read(disp, ZYNQMP_DISP_AV_BUF_FMT);
> + val &= zynqmp_disp_layer_is_video(layer)
> + ? ~ZYNQMP_DISP_AV_BUF_FMT_NL_VID_MASK
> + : ~ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_MASK;
> + val |= fmt->buf_fmt;
> + zynqmp_disp_avbuf_write(disp, reg, val);
> + } else {
> + reg = zynqmp_disp_layer_is_video(layer)
> + ? ZYNQMP_DISP_AV_BUF_LIVE_VID_CONFIG
> + : ZYNQMP_DISP_AV_BUF_LIVE_GFX_CONFIG;
> + val = fmt->buf_fmt;
> + zynqmp_disp_avbuf_write(disp, reg, val);
> + }
>
> for (i = 0; i < ZYNQMP_DISP_AV_BUF_NUM_SF; i++) {
> - unsigned int reg = zynqmp_disp_layer_is_video(layer)
> - ? ZYNQMP_DISP_AV_BUF_VID_COMP_SF(i)
> - : ZYNQMP_DISP_AV_BUF_GFX_COMP_SF(i);
> + reg = zynqmp_disp_layer_is_video(layer)
> + ? ZYNQMP_DISP_AV_BUF_VID_COMP_SF(i)
> + : ZYNQMP_DISP_AV_BUF_GFX_COMP_SF(i);
>
> zynqmp_disp_avbuf_write(disp, reg, fmt->sf[i]);
> }
> @@ -926,6 +936,31 @@ zynqmp_disp_layer_find_format(struct zynqmp_disp_layer *layer,
> return NULL;
> }
>
> +/**
> + * zynqmp_disp_layer_find_live_format - Find format information for given
> + * media bus format
> + * @layer: The layer
> + * @drm_fmt: Media bus format to search
> + *
> + * Search display subsystem format information corresponding to the given media
> + * bus format @media_bus_format for the @layer, and return a pointer to the
> + * format descriptor.
> + *
> + * Return: A pointer to the format descriptor if found, NULL otherwise
> + */
> +static const struct zynqmp_disp_format *
> +zynqmp_disp_layer_find_live_format(struct zynqmp_disp_layer *layer,
> + u32 media_bus_format)
> +{
> + unsigned int i;
> +
> + for (i = 0; i < layer->info->num_formats; i++)
> + if (layer->info->formats[i].bus_fmt == media_bus_format)
> + return &layer->info->formats[i];
> +
> + return NULL;
> +}
> +
> /**
> * zynqmp_disp_layer_drm_formats - Return the DRM formats supported by the layer
> * @layer: The layer
> @@ -1040,6 +1075,9 @@ void zynqmp_disp_layer_disable(struct zynqmp_disp_layer *layer)
> * @layer: The layer
> * @info: The format info
> *
> + * NOTE: Use zynqmp_disp_layer_set_live_format() to set media bus format for
> + * live video layers.
> + *
> * Set the format for @layer to @info. The layer must be disabled.
> */
> void zynqmp_disp_layer_set_format(struct zynqmp_disp_layer *layer,
> @@ -1047,14 +1085,16 @@ void zynqmp_disp_layer_set_format(struct zynqmp_disp_layer *layer,
> {
> unsigned int i;
>
> + if (WARN_ON(layer->mode != ZYNQMP_DPSUB_LAYER_NONLIVE))
> + return;
> +
> layer->disp_fmt = zynqmp_disp_layer_find_format(layer, info->format);
> + if (WARN_ON(!layer->disp_fmt))
> + return;
> layer->drm_fmt = info;
>
> zynqmp_disp_avbuf_set_format(layer->disp, layer, layer->disp_fmt);
>
> - if (layer->mode == ZYNQMP_DPSUB_LAYER_LIVE)
> - return;
> -
> /*
> * Set pconfig for each DMA channel to indicate they're part of a
> * video group.
> @@ -1074,6 +1114,32 @@ void zynqmp_disp_layer_set_format(struct zynqmp_disp_layer *layer,
> }
> }
>
> +/**
> + * zynqmp_disp_layer_set_live_format - Set the live video layer format
> + * @layer: The layer
> + * @info: The format info
> + *
> + * NOTE: This function should not be used to set format for non-live video
> + * layer. Use zynqmp_disp_layer_set_format() instead.
> + *
> + * Set the display format for the live @layer. The layer must be disabled.
> + */
> +void zynqmp_disp_layer_set_live_format(struct zynqmp_disp_layer *layer,
> + u32 media_bus_format)
> +{
> + if (WARN_ON(layer->mode != ZYNQMP_DPSUB_LAYER_LIVE))
> + return;
> +
> + layer->disp_fmt = zynqmp_disp_layer_find_live_format(layer,
> + media_bus_format);
> + if (WARN_ON(!layer->disp_fmt))
> + return;
> +
> + zynqmp_disp_avbuf_set_format(layer->disp, layer, layer->disp_fmt);
> +
> + layer->drm_fmt = drm_format_info(layer->disp_fmt->drm_fmt);
> +}
> +
> /**
> * zynqmp_disp_layer_update - Update the layer framebuffer
> * @layer: The layer
> diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.h b/drivers/gpu/drm/xlnx/zynqmp_disp.h
> index efd1c52c2916..fa545533c9d1 100644
> --- a/drivers/gpu/drm/xlnx/zynqmp_disp.h
> +++ b/drivers/gpu/drm/xlnx/zynqmp_disp.h
> @@ -58,6 +58,8 @@ void zynqmp_disp_layer_enable(struct zynqmp_disp_layer *layer);
> void zynqmp_disp_layer_disable(struct zynqmp_disp_layer *layer);
> void zynqmp_disp_layer_set_format(struct zynqmp_disp_layer *layer,
> const struct drm_format_info *info);
> +void zynqmp_disp_layer_set_live_format(struct zynqmp_disp_layer *layer,
> + u32 media_bus_format);
> int zynqmp_disp_layer_update(struct zynqmp_disp_layer *layer,
> struct drm_plane_state *state);
>
> diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c
> index faaeea526970..a7fa5e2abb9b 100644
> --- a/drivers/gpu/drm/xlnx/zynqmp_dp.c
> +++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c
> @@ -1299,15 +1299,20 @@ static void zynqmp_dp_disp_enable(struct zynqmp_dp *dp,
> struct drm_bridge_state *old_bridge_state)
> {
> struct zynqmp_disp_layer *layer;
> - const struct drm_format_info *info;
> + struct drm_bridge_state *bridge_state;
> + u32 bus_fmt;
>
> layer = zynqmp_dp_disp_connected_live_layer(dp);
> if (!layer)
> return;
>
> - /* TODO: Make the format configurable. */
> - info = drm_format_info(DRM_FORMAT_YUV422);
> - zynqmp_disp_layer_set_format(layer, info);
> + bridge_state = drm_atomic_get_new_bridge_state(old_bridge_state->base.state,
> + old_bridge_state->bridge);
> + if (WARN_ON(!bridge_state))
> + return;
> +
> + bus_fmt = bridge_state->input_bus_cfg.format;
> + zynqmp_disp_layer_set_live_format(layer, bus_fmt);
> zynqmp_disp_layer_enable(layer);
>
> if (layer == dp->dpsub->layers[ZYNQMP_DPSUB_LAYER_GFX])
>
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