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Subject[PATCH v3] drm/bridge/tc358775: Fixes bus formats read
Date
- state->output_bus_cfg.format, memcpy and
unsigned int used
- atomic_check removed
- video data input and output formats added
- bus formats read from drm_bridge_state.output_bus_cfg.format
and .atomic_get_input_bus_fmts() instead of connector

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Vinay Simha BN <simhavcs@gmail.com>

---
v1:
* Laurent Pinchart review comments incorporated
drm_bridge_state.output_bus_cfg.format
instead of connector
v2:
* Laurent Pinchart review comments incorporated
atomic_check removed
ivideo data input and output formats added

v3:
* Laurent Pinchart review comments incorporated
output_bus_fmt removed and using state->output_bus_cfg.format
unsigned int i used
memcpy used for input_fmts
---
drivers/gpu/drm/bridge/tc358775.c | 71 +++++++++++++++++++++++--------
1 file changed, 54 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/bridge/tc358775.c b/drivers/gpu/drm/bridge/tc358775.c
index 2272adcc5b4a..a8998dd447ae 100644
--- a/drivers/gpu/drm/bridge/tc358775.c
+++ b/drivers/gpu/drm/bridge/tc358775.c
@@ -273,6 +273,19 @@ struct tc_data {
u8 bpc;
};

+static const u32 tc_lvds_in_bus_fmts[] = {
+ MEDIA_BUS_FMT_RGB565_1X16,
+ MEDIA_BUS_FMT_RGB666_1X18,
+ MEDIA_BUS_FMT_RGB666_1X24_CPADHI,
+ MEDIA_BUS_FMT_RBG888_1X24,
+};
+
+static const u32 tc_lvds_out_bus_fmts[] = {
+ MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA,
+ MEDIA_BUS_FMT_RGB888_1X7X4_SPWG,
+ MEDIA_BUS_FMT_RGB666_1X7X3_SPWG,
+};
+
static inline struct tc_data *bridge_to_tc(struct drm_bridge *b)
{
return container_of(b, struct tc_data, bridge);
@@ -359,19 +372,6 @@ static void d2l_write(struct i2c_client *i2c, u16 addr, u32 val)
ret, addr);
}

-/* helper function to access bus_formats */
-static struct drm_connector *get_connector(struct drm_encoder *encoder)
-{
- struct drm_device *dev = encoder->dev;
- struct drm_connector *connector;
-
- list_for_each_entry(connector, &dev->mode_config.connector_list, head)
- if (connector->encoder == encoder)
- return connector;
-
- return NULL;
-}
-
static void tc_bridge_enable(struct drm_bridge *bridge)
{
struct tc_data *tc = bridge_to_tc(bridge);
@@ -380,7 +380,8 @@ static void tc_bridge_enable(struct drm_bridge *bridge)
u32 val = 0;
u16 dsiclk, clkdiv, byteclk, t1, t2, t3, vsdelay;
struct drm_display_mode *mode;
- struct drm_connector *connector = get_connector(bridge->encoder);
+ struct drm_bridge_state *state =
+ drm_priv_to_bridge_state(bridge->base.state);

mode = &bridge->encoder->crtc->state->adjusted_mode;

@@ -451,14 +452,13 @@ static void tc_bridge_enable(struct drm_bridge *bridge)
d2l_write(tc->i2c, LVPHY0, LV_PHY0_PRBS_ON(4) | LV_PHY0_ND(6));

dev_dbg(tc->dev, "bus_formats %04x bpc %d\n",
- connector->display_info.bus_formats[0],
+ state->output_bus_cfg.format,
tc->bpc);
/*
* Default hardware register settings of tc358775 configured
* with MEDIA_BUS_FMT_RGB888_1X7X4_JEIDA jeida-24 format
*/
- if (connector->display_info.bus_formats[0] ==
- MEDIA_BUS_FMT_RGB888_1X7X4_SPWG) {
+ if (state->output_bus_cfg.format == MEDIA_BUS_FMT_RGB888_1X7X4_SPWG) {
/* VESA-24 */
d2l_write(tc->i2c, LV_MX0003, LV_MX(LVI_R0, LVI_R1, LVI_R2, LVI_R3));
d2l_write(tc->i2c, LV_MX0407, LV_MX(LVI_R4, LVI_R7, LVI_R5, LVI_G0));
@@ -590,6 +590,39 @@ static int tc358775_parse_dt(struct device_node *np, struct tc_data *tc)
return 0;
}

+static u32 *
+tc_bridge_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 = NULL;
+ unsigned int i;
+
+ *num_input_fmts = 0;
+
+ for (i = 0 ; i < ARRAY_SIZE(tc_lvds_out_bus_fmts) ; ++i) {
+ if (output_fmt == tc_lvds_out_bus_fmts[i])
+ break;
+ }
+
+ if (i == ARRAY_SIZE(tc_lvds_out_bus_fmts))
+ return NULL;
+
+ *num_input_fmts = ARRAY_SIZE(tc_lvds_in_bus_fmts);
+
+ input_fmts = kcalloc(*num_input_fmts, ARRAY_SIZE(tc_lvds_in_bus_fmts),
+ GFP_KERNEL);
+ if (!input_fmts)
+ return NULL;
+
+ memcpy(input_fmts, tc_lvds_in_bus_fmts, sizeof(*input_fmts));
+
+ return input_fmts;
+}
+
static int tc_bridge_attach(struct drm_bridge *bridge,
enum drm_bridge_attach_flags flags)
{
@@ -639,6 +672,10 @@ static int tc_bridge_attach(struct drm_bridge *bridge,
}

static const struct drm_bridge_funcs tc_bridge_funcs = {
+ .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,
+ .atomic_get_input_bus_fmts = tc_bridge_get_input_bus_fmts,
.attach = tc_bridge_attach,
.pre_enable = tc_bridge_pre_enable,
.enable = tc_bridge_enable,
--
2.17.1
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