[PATCH 2/4] drm: xlnx: zynqmp_dpsub: Anounce supported input formats

Anatoliy Klymenko
2024-02-27T04:45:18Z

DPSUB in bridge mode supports multiple input media bus formats.

Announce the list of supported input media bus formats via
drm_bridge.atomic_get_input_bus_fmts callback.

Signed-off-by: Anatoliy Klymenko <anatoliy.klymenko@amd.com>
---
drivers/gpu/drm/xlnx/zynqmp_disp.c | 37 +++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/xlnx/zynqmp_disp.h | 10 ++++++++++
drivers/gpu/drm/xlnx/zynqmp_dp.c | 1 +
3 files changed, 48 insertions(+)

diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
index e6d26ef60e89..ee99aad915ba 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
@@ -18,6 +18,7 @@
#include <linux/dma/xilinx_dpdma.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
+#include <linux/media-bus-format.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
@@ -77,12 +78,14 @@ enum zynqmp_dpsub_layer_mode {
/**
* struct zynqmp_disp_format - Display subsystem format information
* @drm_fmt: DRM format (4CC)
+ * @bus_fmt: Media bus format
* @buf_fmt: AV buffer format
* @swap: Flag to swap R & B for RGB formats, and U & V for YUV formats
* @sf: Scaling factors for color components
*/
struct zynqmp_disp_format {
u32 drm_fmt;
+ u32 bus_fmt;
u32 buf_fmt;
bool swap;
const u32 *sf;
@@ -364,6 +367,40 @@ static const struct zynqmp_disp_format avbuf_gfx_fmts[] = {
},
};

+/* List of live video layer formats */
+static const struct zynqmp_disp_format avbuf_live_fmts[] = {
+ {
+ .drm_fmt = DRM_FORMAT_VYUY,
+ .bus_fmt = MEDIA_BUS_FMT_VYUY8_1X16,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_LIVE_CONFIG_BPC_8 |
+ ZYNQMP_DISP_AV_BUF_LIVE_CONFIG_FMT_YUV422,
+ .sf = scaling_factors_888,
+ },
+};
+
+u32 *zynqmp_disp_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts)
+{
+ int i;
+ u32 *input_fmts;
+
+ input_fmts = kcalloc(ARRAY_SIZE(avbuf_live_fmts), sizeof(*input_fmts), GFP_KERNEL);
+ if (!input_fmts) {
+ *num_input_fmts = 0;
+ return input_fmts;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(avbuf_live_fmts); ++i)
+ input_fmts[i] = avbuf_live_fmts[i].bus_fmt;
+ *num_input_fmts = ARRAY_SIZE(avbuf_live_fmts);
+
+ return input_fmts;
+}
+
static u32 zynqmp_disp_avbuf_read(struct zynqmp_disp *disp, int reg)
{
return readl(disp->avbuf.base + reg);
diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.h b/drivers/gpu/drm/xlnx/zynqmp_disp.h
index 9b8b202224d9..c2c8dd4896ba 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_disp.h
+++ b/drivers/gpu/drm/xlnx/zynqmp_disp.h
@@ -27,6 +27,10 @@
struct device;
struct drm_format_info;
struct drm_plane_state;
+struct drm_bridge;
+struct drm_bridge_state;
+struct drm_connector_state;
+struct drm_crtc_state;
struct platform_device;
struct zynqmp_disp;
struct zynqmp_disp_layer;
@@ -52,6 +56,12 @@ void zynqmp_disp_blend_set_global_alpha(struct zynqmp_disp *disp,

u32 *zynqmp_disp_layer_drm_formats(struct zynqmp_disp_layer *layer,
unsigned int *num_formats);
+u32 *zynqmp_disp_get_input_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ u32 output_fmt,
+ unsigned int *num_input_fmts);
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,
diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c
index 04b6bcac3b07..9cb7ac9f3097 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_dp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c
@@ -1580,6 +1580,7 @@ static const struct drm_bridge_funcs zynqmp_dp_bridge_funcs = {
.atomic_check = zynqmp_dp_bridge_atomic_check,
.detect = zynqmp_dp_bridge_detect,
.edid_read = zynqmp_dp_bridge_edid_read,
+ .atomic_get_input_bus_fmts = zynqmp_disp_get_input_bus_fmts,
};

/* -----------------------------------------------------------------------------

--
2.25.1