Now that bridges can expose the bus format/flags they expect, we can
use those instead of the relying on the display_info provided by the
connector (which is only valid if the encoder is directly connected
to bridge element driving the panel/display).
We also explicitly expose the bus formats supported by our encoder by
filling encoder->output_bus_caps with proper info.
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
---
Changes in v2:
* Adjust things to match the new bus-format negotiation infra
---
drivers/gpu/drm/imx/parallel-display.c | 136 ++++++++++++++++++++++---
1 file changed, 120 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/imx/parallel-display.c b/drivers/gpu/drm/imx/parallel-display.c
index 35518e5de356..df47cb74759f 100644
--- a/drivers/gpu/drm/imx/parallel-display.c
+++ b/drivers/gpu/drm/imx/parallel-display.c
@@ -89,37 +89,139 @@ static struct drm_encoder *imx_pd_connector_best_encoder(
return &imxpd->encoder;
}
-static void imx_pd_encoder_enable(struct drm_encoder *encoder)
+static void imx_pd_bridge_enable(struct drm_bridge *bridge)
{
+ struct drm_encoder *encoder = bridge_to_encoder(bridge);
struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
drm_panel_prepare(imxpd->panel);
drm_panel_enable(imxpd->panel);
}
-static void imx_pd_encoder_disable(struct drm_encoder *encoder)
+static void imx_pd_bridge_disable(struct drm_bridge *bridge)
{
+ struct drm_encoder *encoder = bridge_to_encoder(bridge);
struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
drm_panel_disable(imxpd->panel);
drm_panel_unprepare(imxpd->panel);
}
-static int imx_pd_encoder_atomic_check(struct drm_encoder *encoder,
- struct drm_crtc_state *crtc_state,
- struct drm_connector_state *conn_state)
+static const u32 imx_pd_bus_fmts[] = {
+ MEDIA_BUS_FMT_RGB888_1X24,
+ MEDIA_BUS_FMT_RGB565_1X16,
+ MEDIA_BUS_FMT_RGB666_1X18,
+ MEDIA_BUS_FMT_RGB666_1X24_CPADHI,
+};
+
+static void
+imx_pd_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,
+ u32 *output_fmts)
{
+ struct drm_display_info *di = &conn_state->connector->display_info;
+ struct drm_encoder *encoder = bridge_to_encoder(bridge);
+ struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
+
+ *num_output_fmts = 1;
+ if (imxpd->bus_format) {
+ if (output_fmts)
+ output_fmts[0] = imxpd->bus_format;
+ } else if (di->num_bus_formats) {
+ *num_output_fmts = 1;
+ if (output_fmts)
+ output_fmts[0] = di->bus_formats[0];
+ } else {
+ *num_output_fmts = ARRAY_SIZE(imx_pd_bus_fmts);
+ if (output_fmts)
+ memcpy(output_fmts, imx_pd_bus_fmts,
+ ARRAY_SIZE(imx_pd_bus_fmts));
+ }
+}
+
+static void
+imx_pd_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)
+{
+ struct drm_encoder *encoder = bridge_to_encoder(bridge);
+ struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
+
+ *num_input_fmts = 0;
+ if (output_fmt == MEDIA_BUS_FMT_FIXED) {
+ *num_input_fmts = 1;
+ } else if (!imxpd->bus_format) {
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(imx_pd_bus_fmts); i++) {
+ if (imx_pd_bus_fmts[i] == output_fmt) {
+ *num_input_fmts = 1;
+ break;
+ }
+ }
+ } else if (imxpd->bus_format == output_fmt) {
+ *num_input_fmts = 1;
+ }
+
+ if (*num_input_fmts && input_fmts)
+ input_fmts[0] = MEDIA_BUS_FMT_FIXED;
+}
+
+static int imx_pd_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 drm_encoder *encoder = bridge_to_encoder(bridge);
struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state);
struct drm_display_info *di = &conn_state->connector->display_info;
struct imx_parallel_display *imxpd = enc_to_imxpd(encoder);
+ struct drm_bridge_state *next_bridge_state = NULL;
+ struct drm_bridge *next_bridge;
+ u32 bus_flags, bus_fmt;
+ unsigned int i;
- if (!imxpd->bus_format && di->num_bus_formats) {
- imx_crtc_state->bus_flags = di->bus_flags;
- imx_crtc_state->bus_format = di->bus_formats[0];
- } else {
- imx_crtc_state->bus_flags = imxpd->bus_flags;
- imx_crtc_state->bus_format = imxpd->bus_format;
+ next_bridge = drm_bridge_chain_get_next_bridge(bridge);
+ if (next_bridge)
+ next_bridge_state = drm_atomic_get_new_bridge_state(crtc_state->state,
+ next_bridge);
+
+ bus_fmt = bridge_state->output_bus_cfg.fmt;
+ if (bus_fmt == MEDIA_BUS_FMT_FIXED)
+ bus_fmt = 0;
+
+ if (next_bridge_state)
+ bus_flags = next_bridge_state->input_bus_cfg.flags;
+ else if (!imxpd->bus_format && di->num_bus_formats)
+ bus_flags = di->bus_flags;
+ else
+ bus_flags = imxpd->bus_flags;
+
+ for (i = 0; bus_fmt && i < ARRAY_SIZE(imx_pd_bus_fmts); i++) {
+ if (imx_pd_bus_fmts[i] == bridge_state->output_bus_cfg.fmt)
+ break;
}
+
+ if (i == ARRAY_SIZE(imx_pd_bus_fmts))
+ return -EINVAL;
+
+ if (bus_flags &
+ ~(DRM_BUS_FLAG_DE_LOW | DRM_BUS_FLAG_DE_HIGH |
+ DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE |
+ DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE))
+ return -EINVAL;
+
+ bridge_state->output_bus_cfg.flags = bus_flags;
+ bridge_state->input_bus_cfg.flags = bus_flags;
+ imx_crtc_state->bus_flags = bus_flags;
+ imx_crtc_state->bus_format = bridge_state->output_bus_cfg.fmt;
imx_crtc_state->di_hsync_pin = 2;
imx_crtc_state->di_vsync_pin = 3;
@@ -143,10 +245,12 @@ static const struct drm_encoder_funcs imx_pd_encoder_funcs = {
.destroy = imx_drm_encoder_destroy,
};
-static const struct drm_encoder_helper_funcs imx_pd_encoder_helper_funcs = {
- .enable = imx_pd_encoder_enable,
- .disable = imx_pd_encoder_disable,
- .atomic_check = imx_pd_encoder_atomic_check,
+static const struct drm_bridge_funcs imx_pd_bridge_funcs = {
+ .enable = imx_pd_bridge_enable,
+ .disable = imx_pd_bridge_disable,
+ .atomic_check = imx_pd_bridge_atomic_check,
+ .atomic_get_input_bus_fmts = imx_pd_bridge_atomic_get_input_bus_fmts,
+ .atomic_get_output_bus_fmts = imx_pd_bridge_atomic_get_output_bus_fmts,
};
static int imx_pd_register(struct drm_device *drm,
@@ -166,7 +270,7 @@ static int imx_pd_register(struct drm_device *drm,
*/
imxpd->connector.dpms = DRM_MODE_DPMS_OFF;
- drm_encoder_helper_add(encoder, &imx_pd_encoder_helper_funcs);
+ encoder->bridge.funcs = &imx_pd_bridge_funcs;
drm_encoder_init(drm, encoder, &imx_pd_encoder_funcs,
DRM_MODE_ENCODER_NONE, NULL);
--
2.21.0
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