Re: [PATCH v4 6/7] drm: xlnx: zynqmp_dpsub: Set input live format
From: Tomi Valkeinen
Date: Wed Apr 17 2024 - 06:30:32 EST
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@xxxxxxx>
---
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@xxxxxxxxxxxxxxxx>
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])