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drm/imx: store internal bus configuration in crtc state

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The internal bus configuration is imx-drm specific crtc state. Store it
in imx_crtc_state and let the encoder atomic_check callbacks determine
bus_flags, bus_format and the sync pins, possibly taking into account
the mode and the connector display info.
The custom imx_drm_encoder structure can be replaced again with
drm_encoder.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Philipp Zabel
2016-07-06 14:49:24 +02:00
parent e41c5c2411
commit 49f98bc4d4
6 changed files with 229 additions and 107 deletions
Download Patch File Download Diff File Expand all files Collapse all files

111
drivers/gpu/drm/imx/imx-ldb.c
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@@ -17,6 +17,7 @@
#include <linux/clk.h>
#include <linux/component.h>
#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_crtc_helper.h>
@@ -51,15 +52,13 @@
#define LDB_BGREF_RMODE_INT (1 << 15)
#define con_to_imx_ldb_ch(x) container_of(x, struct imx_ldb_channel, connector)
#define imx_enc_to_imx_ldb_ch(x) \
container_of(x, struct imx_ldb_channel, imx_encoder)
struct imx_ldb;
struct imx_ldb_channel {
struct imx_ldb *ldb;
struct drm_connector connector;
struct imx_drm_encoder imx_encoder;
struct drm_encoder encoder;
struct drm_panel *panel;
struct device_node *child;
struct i2c_adapter *ddc;
@@ -68,8 +67,14 @@ struct imx_ldb_channel {
int edid_len;
struct drm_display_mode mode;
int mode_valid;
u32 bus_format;
};
static inline struct imx_ldb_channel *enc_to_imx_ldb_ch(struct drm_encoder *e)
{
return container_of(e, struct imx_ldb_channel, encoder);
}
struct bus_mux {
int reg;
int shift;
@@ -94,25 +99,22 @@ static enum drm_connector_status imx_ldb_connector_detect(
return connector_status_connected;
}
static void imx_ldb_bus_format_translation(struct imx_ldb_channel *imx_ldb_ch,
u32 bus_format)
static void imx_ldb_ch_set_bus_format(struct imx_ldb_channel *imx_ldb_ch,
u32 bus_format)
{
struct imx_ldb *ldb = imx_ldb_ch->ldb;
int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
switch (bus_format) {
case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
imx_ldb_ch->imx_encoder.bus_format = MEDIA_BUS_FMT_RGB666_1X18;
break;
case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
imx_ldb_ch->imx_encoder.bus_format = MEDIA_BUS_FMT_RGB888_1X24;
if (imx_ldb_ch->chno == 0 || dual)
ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24;
if (imx_ldb_ch->chno == 1 || dual)
ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH1_24;
break;
case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
imx_ldb_ch->imx_encoder.bus_format = MEDIA_BUS_FMT_RGB888_1X24;
if (imx_ldb_ch->chno == 0 || dual)
ldb->ldb_ctrl |= LDB_DATA_WIDTH_CH0_24 |
LDB_BIT_MAP_CH0_JEIDA;
@@ -130,12 +132,7 @@ static int imx_ldb_connector_get_modes(struct drm_connector *connector)
if (imx_ldb_ch->panel && imx_ldb_ch->panel->funcs &&
imx_ldb_ch->panel->funcs->get_modes) {
struct drm_display_info *di = &connector->display_info;
num_modes = imx_ldb_ch->panel->funcs->get_modes(imx_ldb_ch->panel);
if (!imx_ldb_ch->imx_encoder.bus_format && di->num_bus_formats)
imx_ldb_bus_format_translation(imx_ldb_ch,
di->bus_formats[0]);
if (num_modes > 0)
return num_modes;
}
@@ -169,7 +166,7 @@ static struct drm_encoder *imx_ldb_connector_best_encoder(
{
struct imx_ldb_channel *imx_ldb_ch = con_to_imx_ldb_ch(connector);
return &imx_ldb_ch->imx_encoder.encoder;
return &imx_ldb_ch->encoder;
}
static void imx_ldb_set_clock(struct imx_ldb *ldb, int mux, int chno,
@@ -202,8 +199,7 @@ static void imx_ldb_set_clock(struct imx_ldb *ldb, int mux, int chno,
static void imx_ldb_encoder_enable(struct drm_encoder *encoder)
{
struct imx_drm_encoder *imx_encoder = enc_to_imx_enc(encoder);
struct imx_ldb_channel *imx_ldb_ch = imx_enc_to_imx_ldb_ch(imx_encoder);
struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
struct imx_ldb *ldb = imx_ldb_ch->ldb;
int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
int mux = drm_of_encoder_active_port_id(imx_ldb_ch->child, encoder);
@@ -256,13 +252,13 @@ static void imx_ldb_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *orig_mode,
struct drm_display_mode *mode)
{
struct imx_drm_encoder *imx_encoder = enc_to_imx_enc(encoder);
struct imx_ldb_channel *imx_ldb_ch = imx_enc_to_imx_ldb_ch(imx_encoder);
struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
struct imx_ldb *ldb = imx_ldb_ch->ldb;
int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
unsigned long serial_clk;
unsigned long di_clk = mode->clock * 1000;
int mux = drm_of_encoder_active_port_id(imx_ldb_ch->child, encoder);
u32 bus_format = imx_ldb_ch->bus_format;
if (mode->clock > 170000) {
dev_warn(ldb->dev,
@@ -284,24 +280,41 @@ static void imx_ldb_encoder_mode_set(struct drm_encoder *encoder,
}
/* FIXME - assumes straight connections DI0 --> CH0, DI1 --> CH1 */
if (imx_ldb_ch == &ldb->channel[0]) {
if (imx_ldb_ch == &ldb->channel[0] || dual) {
if (mode->flags & DRM_MODE_FLAG_NVSYNC)
ldb->ldb_ctrl |= LDB_DI0_VS_POL_ACT_LOW;
else if (mode->flags & DRM_MODE_FLAG_PVSYNC)
ldb->ldb_ctrl &= ~LDB_DI0_VS_POL_ACT_LOW;
}
if (imx_ldb_ch == &ldb->channel[1]) {
if (imx_ldb_ch == &ldb->channel[1] || dual) {
if (mode->flags & DRM_MODE_FLAG_NVSYNC)
ldb->ldb_ctrl |= LDB_DI1_VS_POL_ACT_LOW;
else if (mode->flags & DRM_MODE_FLAG_PVSYNC)
ldb->ldb_ctrl &= ~LDB_DI1_VS_POL_ACT_LOW;
}
if (!bus_format) {
struct drm_connector_state *conn_state;
struct drm_connector *connector;
int i;
for_each_connector_in_state(encoder->crtc->state->state,
connector, conn_state, i) {
struct drm_display_info *di = &connector->display_info;
if (conn_state->crtc == encoder->crtc &&
di->num_bus_formats) {
bus_format = di->bus_formats[0];
break;
}
}
}
imx_ldb_ch_set_bus_format(imx_ldb_ch, bus_format);
}
static void imx_ldb_encoder_disable(struct drm_encoder *encoder)
{
struct imx_drm_encoder *imx_encoder = enc_to_imx_enc(encoder);
struct imx_ldb_channel *imx_ldb_ch = imx_enc_to_imx_ldb_ch(imx_encoder);
struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
struct imx_ldb *ldb = imx_ldb_ch->ldb;
int mux, ret;
@@ -356,6 +369,37 @@ static void imx_ldb_encoder_disable(struct drm_encoder *encoder)
drm_panel_unprepare(imx_ldb_ch->panel);
}
static int imx_ldb_encoder_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state);
struct imx_ldb_channel *imx_ldb_ch = enc_to_imx_ldb_ch(encoder);
struct drm_display_info *di = &conn_state->connector->display_info;
u32 bus_format = imx_ldb_ch->bus_format;
/* Bus format description in DT overrides connector display info. */
if (!bus_format && di->num_bus_formats)
bus_format = di->bus_formats[0];
switch (bus_format) {
case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
imx_crtc_state->bus_format = MEDIA_BUS_FMT_RGB666_1X18;
break;
case MEDIA_BUS_FMT_RGB888_1X7X4_SPWG:
case MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA:
imx_crtc_state->bus_format = MEDIA_BUS_FMT_RGB888_1X24;
break;
default:
return -EINVAL;
}
imx_crtc_state->di_hsync_pin = 2;
imx_crtc_state->di_vsync_pin = 3;
return 0;
}
static const struct drm_connector_funcs imx_ldb_connector_funcs = {
.dpms = drm_atomic_helper_connector_dpms,
.fill_modes = drm_helper_probe_single_connector_modes,
@@ -379,6 +423,7 @@ static const struct drm_encoder_helper_funcs imx_ldb_encoder_helper_funcs = {
.mode_set = imx_ldb_encoder_mode_set,
.enable = imx_ldb_encoder_enable,
.disable = imx_ldb_encoder_disable,
.atomic_check = imx_ldb_encoder_atomic_check,
};
static int imx_ldb_get_clk(struct imx_ldb *ldb, int chno)
@@ -400,10 +445,10 @@ static int imx_ldb_register(struct drm_device *drm,
struct imx_ldb_channel *imx_ldb_ch)
{
struct imx_ldb *ldb = imx_ldb_ch->ldb;
struct drm_encoder *encoder = &imx_ldb_ch->encoder;
int ret;
ret = imx_drm_encoder_parse_of(drm, &imx_ldb_ch->imx_encoder.encoder,
imx_ldb_ch->child);
ret = imx_drm_encoder_parse_of(drm, encoder, imx_ldb_ch->child);
if (ret)
return ret;
@@ -417,10 +462,9 @@ static int imx_ldb_register(struct drm_device *drm,
return ret;
}
drm_encoder_helper_add(&imx_ldb_ch->imx_encoder.encoder,
&imx_ldb_encoder_helper_funcs);
drm_encoder_init(drm, &imx_ldb_ch->imx_encoder.encoder,
&imx_ldb_encoder_funcs, DRM_MODE_ENCODER_LVDS, NULL);
drm_encoder_helper_add(encoder, &imx_ldb_encoder_helper_funcs);
drm_encoder_init(drm, encoder, &imx_ldb_encoder_funcs,
DRM_MODE_ENCODER_LVDS, NULL);
drm_connector_helper_add(&imx_ldb_ch->connector,
&imx_ldb_connector_helper_funcs);
@@ -430,8 +474,7 @@ static int imx_ldb_register(struct drm_device *drm,
if (imx_ldb_ch->panel)
drm_panel_attach(imx_ldb_ch->panel, &imx_ldb_ch->connector);
drm_mode_connector_attach_encoder(&imx_ldb_ch->connector,
&imx_ldb_ch->imx_encoder.encoder);
drm_mode_connector_attach_encoder(&imx_ldb_ch->connector, encoder);
return 0;
}
@@ -648,10 +691,7 @@ static int imx_ldb_bind(struct device *dev, struct device *master, void *data)
bus_format);
return bus_format;
}
imx_ldb_bus_format_translation(channel, bus_format);
channel->imx_encoder.di_hsync_pin = 2;
channel->imx_encoder.di_vsync_pin = 3;
channel->bus_format = bus_format;
ret = imx_ldb_register(drm, channel);
if (ret)
@@ -676,8 +716,7 @@ static void imx_ldb_unbind(struct device *dev, struct device *master,
continue;
channel->connector.funcs->destroy(&channel->connector);
channel->imx_encoder.encoder.funcs->destroy(
&channel->imx_encoder.encoder);
channel->encoder.funcs->destroy(&channel->encoder);
kfree(channel->edid);
i2c_put_adapter(channel->ddc);