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drm/mediatek: dpi: Add bus format negotiation

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Add the atomic_get_output_bus_fmts, atomic_get_input_bus_fmts to negotiate
the possible output and input formats for the current mode and monitor,
and use the negotiated formats in a basic atomic_check callback.

Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
This commit is contained in:
Rex-BC Chen 2021-05-26 16:52:19 +08:00 committed by Chun-Kuang Hu
parent be63f6e860
commit ec8747c524
1 changed files with 80 additions and 5 deletions
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85
drivers/gpu/drm/mediatek/mtk_dpi.c
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@ -549,6 +549,80 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
return 0;
}
static u32 *mtk_dpi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state,
unsigned int *num_output_fmts)
{
struct mtk_dpi *dpi = bridge_to_dpi(bridge);
u32 *output_fmts;
*num_output_fmts = 0;
if (!dpi->conf->output_fmts) {
dev_err(dpi->dev, "output_fmts should not be null\n");
return NULL;
}
output_fmts = kcalloc(dpi->conf->num_output_fmts, sizeof(*output_fmts),
GFP_KERNEL);
if (!output_fmts)
return NULL;
*num_output_fmts = dpi->conf->num_output_fmts;
memcpy(output_fmts, dpi->conf->output_fmts,
sizeof(*output_fmts) * dpi->conf->num_output_fmts);
return output_fmts;
}
static u32 *mtk_dpi_bridge_atomic_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)
{
u32 *input_fmts;
*num_input_fmts = 0;
input_fmts = kcalloc(1, sizeof(*input_fmts),
GFP_KERNEL);
if (!input_fmts)
return NULL;
*num_input_fmts = 1;
input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
return input_fmts;
}
static int mtk_dpi_bridge_atomic_check(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct mtk_dpi *dpi = bridge->driver_private;
unsigned int out_bus_format;
out_bus_format = bridge_state->output_bus_cfg.format;
dev_dbg(dpi->dev, "input format 0x%04x, output format 0x%04x\n",
bridge_state->input_bus_cfg.format,
bridge_state->output_bus_cfg.format);
dpi->output_fmt = out_bus_format;
dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
return 0;
}
static int mtk_dpi_bridge_attach(struct drm_bridge *bridge,
enum drm_bridge_attach_flags flags)
{
@ -601,6 +675,12 @@ static const struct drm_bridge_funcs mtk_dpi_bridge_funcs = {
.mode_valid = mtk_dpi_bridge_mode_valid,
.disable = mtk_dpi_bridge_disable,
.enable = mtk_dpi_bridge_enable,
.atomic_check = mtk_dpi_bridge_atomic_check,
.atomic_get_output_bus_fmts = mtk_dpi_bridge_atomic_get_output_bus_fmts,
.atomic_get_input_bus_fmts = mtk_dpi_bridge_atomic_get_input_bus_fmts,
.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
.atomic_reset = drm_atomic_helper_bridge_reset,
};
void mtk_dpi_start(struct device *dev)
@ -647,11 +727,6 @@ static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
}
drm_connector_attach_encoder(dpi->connector, &dpi->encoder);
dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
return 0;
err_cleanup: