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Message-Id: <20210527232206.152771-2-paul@crapouillou.net>
Date: Fri, 28 May 2021 00:22:06 +0100
From: Paul Cercueil <paul@...pouillou.net>
To: David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
Thomas Zimmermann <tzimmermann@...e.de>,
Maxime Ripard <mripard@...nel.org>
Cc: list@...ndingux.net, linux-mips@...r.kernel.org,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
Neil Armstrong <narmstrong@...libre.com>,
Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH 11/11] drm/ingenic: Attach bridge chain to encoders
Attach a top-level bridge to each encoder, which will be used for
negociating the bus format and flags.
Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 98 ++++++++++++++++++-----
1 file changed, 77 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
index 01d8490393d1..f0242e917d6e 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
+++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
@@ -21,6 +21,7 @@
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
+#include <drm/drm_bridge_connector.h>
#include <drm/drm_color_mgmt.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
@@ -132,6 +133,26 @@ struct ingenic_drm {
struct drm_private_obj private_obj;
};
+struct ingenic_drm_bridge {
+ struct drm_encoder encoder;
+ struct drm_bridge bridge;
+ struct drm_bridge *next_bridge;
+
+ /*
+ * FIXME: this should really be in ingenic_drm_private_state, but there
+ * doesn't seem to be a way to retrieve a pointer to it from within
+ * ingenic_drm_encoder_atomic_mode_set (no drm_atomic_state
+ * back-pointers).
+ */
+ struct drm_bus_cfg bus_cfg;
+};
+
+static inline struct ingenic_drm_bridge *
+to_ingenic_drm_bridge(struct drm_encoder *encoder)
+{
+ return container_of(encoder, struct ingenic_drm_bridge, encoder);
+}
+
static inline struct ingenic_drm_private_state *
to_ingenic_drm_priv_state(struct drm_private_state *state)
{
@@ -749,11 +770,10 @@ static void ingenic_drm_encoder_atomic_mode_set(struct drm_encoder *encoder,
{
struct ingenic_drm *priv = drm_device_get_priv(encoder->dev);
struct drm_display_mode *mode = &crtc_state->adjusted_mode;
- struct drm_connector *conn = conn_state->connector;
- struct drm_display_info *info = &conn->display_info;
+ struct ingenic_drm_bridge *bridge = to_ingenic_drm_bridge(encoder);
unsigned int cfg, rgbcfg = 0;
- priv->panel_is_sharp = info->bus_flags & DRM_BUS_FLAG_SHARP_SIGNALS;
+ priv->panel_is_sharp = bridge->bus_cfg.flags & DRM_BUS_FLAG_SHARP_SIGNALS;
if (priv->panel_is_sharp) {
cfg = JZ_LCD_CFG_MODE_SPECIAL_TFT_1 | JZ_LCD_CFG_REV_POLARITY;
@@ -766,19 +786,19 @@ static void ingenic_drm_encoder_atomic_mode_set(struct drm_encoder *encoder,
cfg |= JZ_LCD_CFG_HSYNC_ACTIVE_LOW;
if (mode->flags & DRM_MODE_FLAG_NVSYNC)
cfg |= JZ_LCD_CFG_VSYNC_ACTIVE_LOW;
- if (info->bus_flags & DRM_BUS_FLAG_DE_LOW)
+ if (bridge->bus_cfg.flags & DRM_BUS_FLAG_DE_LOW)
cfg |= JZ_LCD_CFG_DE_ACTIVE_LOW;
- if (info->bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)
+ if (bridge->bus_cfg.flags & DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)
cfg |= JZ_LCD_CFG_PCLK_FALLING_EDGE;
if (!priv->panel_is_sharp) {
- if (conn->connector_type == DRM_MODE_CONNECTOR_TV) {
+ if (conn_state->connector->connector_type == DRM_MODE_CONNECTOR_TV) {
if (mode->flags & DRM_MODE_FLAG_INTERLACE)
cfg |= JZ_LCD_CFG_MODE_TV_OUT_I;
else
cfg |= JZ_LCD_CFG_MODE_TV_OUT_P;
} else {
- switch (*info->bus_formats) {
+ switch (bridge->bus_cfg.format) {
case MEDIA_BUS_FMT_RGB565_1X16:
cfg |= JZ_LCD_CFG_MODE_GENERIC_16BIT;
break;
@@ -804,20 +824,31 @@ static void ingenic_drm_encoder_atomic_mode_set(struct drm_encoder *encoder,
regmap_write(priv->map, JZ_REG_LCD_RGBC, rgbcfg);
}
-static int ingenic_drm_encoder_atomic_check(struct drm_encoder *encoder,
- struct drm_crtc_state *crtc_state,
- struct drm_connector_state *conn_state)
+static int ingenic_drm_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct drm_encoder *encoder = bridge->encoder;
+ struct ingenic_drm_bridge *ingenic_bridge = to_ingenic_drm_bridge(encoder);
+
+ return drm_bridge_attach(encoder, ingenic_bridge->next_bridge,
+ &ingenic_bridge->bridge, flags);
+}
+
+static int ingenic_drm_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_display_info *info = &conn_state->connector->display_info;
struct drm_display_mode *mode = &crtc_state->adjusted_mode;
+ struct drm_encoder *encoder = bridge->encoder;
+ struct ingenic_drm_bridge *ingenic_bridge = to_ingenic_drm_bridge(encoder);
- if (info->num_bus_formats != 1)
- return -EINVAL;
+ ingenic_bridge->bus_cfg = bridge_state->output_bus_cfg;
if (conn_state->connector->connector_type == DRM_MODE_CONNECTOR_TV)
return 0;
- switch (*info->bus_formats) {
+ switch (bridge_state->output_bus_cfg.format) {
case MEDIA_BUS_FMT_RGB888_3X8:
case MEDIA_BUS_FMT_RGB888_3X8_DELTA:
/*
@@ -1056,8 +1087,16 @@ static const struct drm_crtc_helper_funcs ingenic_drm_crtc_helper_funcs = {
};
static const struct drm_encoder_helper_funcs ingenic_drm_encoder_helper_funcs = {
- .atomic_mode_set = ingenic_drm_encoder_atomic_mode_set,
- .atomic_check = ingenic_drm_encoder_atomic_check,
+ .atomic_mode_set = ingenic_drm_encoder_atomic_mode_set,
+};
+
+static const struct drm_bridge_funcs ingenic_drm_bridge_funcs = {
+ .attach = ingenic_drm_bridge_attach,
+ .atomic_check = ingenic_drm_bridge_atomic_check,
+ .atomic_reset = drm_atomic_helper_bridge_reset,
+ .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+ .atomic_get_input_bus_fmts = drm_atomic_helper_bridge_propagate_bus_fmt,
};
static const struct drm_mode_config_funcs ingenic_drm_mode_config_funcs = {
@@ -1097,12 +1136,14 @@ static int ingenic_drm_bind(struct device *dev, bool has_components)
{
struct platform_device *pdev = to_platform_device(dev);
struct ingenic_drm_private_state *private_state;
+ struct ingenic_drm_bridge *ingenic_bridge;
const struct jz_soc_info *soc_info;
struct ingenic_drm *priv;
struct clk *parent_clk;
struct drm_plane *primary;
struct drm_bridge *bridge;
struct drm_panel *panel;
+ struct drm_connector *connector;
struct drm_encoder *encoder;
struct drm_device *drm;
void __iomem *base;
@@ -1291,22 +1332,37 @@ static int ingenic_drm_bind(struct device *dev, bool has_components)
bridge = devm_drm_panel_bridge_add_typed(dev, panel,
DRM_MODE_CONNECTOR_DPI);
- encoder = drmm_plain_encoder_alloc(drm, NULL, DRM_MODE_ENCODER_DPI, NULL);
- if (IS_ERR(encoder)) {
- ret = PTR_ERR(encoder);
+ ingenic_bridge = drmm_encoder_alloc(drm, struct ingenic_drm_bridge,
+ encoder, NULL,
+ DRM_MODE_ENCODER_DPI, NULL);
+ if (IS_ERR(ingenic_bridge)) {
+ ret = PTR_ERR(ingenic_bridge);
dev_err(dev, "Failed to init encoder: %d\n", ret);
return ret;
}
- encoder->possible_crtcs = 1;
+ encoder = &ingenic_bridge->encoder;
+ encoder->possible_crtcs = drm_crtc_mask(&priv->crtc);
drm_encoder_helper_add(encoder, &ingenic_drm_encoder_helper_funcs);
- ret = drm_bridge_attach(encoder, bridge, NULL, 0);
+ ingenic_bridge->bridge.funcs = &ingenic_drm_bridge_funcs;
+ ingenic_bridge->next_bridge = bridge;
+
+ ret = drm_bridge_attach(encoder, &ingenic_bridge->bridge, NULL,
+ DRM_BRIDGE_ATTACH_NO_CONNECTOR);
if (ret) {
dev_err(dev, "Unable to attach bridge\n");
return ret;
}
+
+ connector = drm_bridge_connector_init(drm, encoder);
+ if (IS_ERR(connector)) {
+ dev_err(dev, "Unable to init connector\n");
+ return PTR_ERR(connector);
+ }
+
+ drm_connector_attach_encoder(connector, encoder);
}
drm_for_each_encoder(encoder, drm) {
--
2.30.2
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