@@ -72,6 +72,7 @@ struct goodix_chip_data {
u16 config_addr;
int config_len;
int (*check_config)(struct goodix_ts_data *, const struct firmware *);
+ void (*fix_config)(struct goodix_ts_data *ts);
};
struct goodix_ts_data {
@@ -96,35 +97,42 @@ struct goodix_ts_data {
unsigned long irq_flags;
enum goodix_irq_pin_access_method irq_pin_access_method;
unsigned int contact_size;
+ u8 config[GOODIX_CONFIG_MAX_LENGTH];
};
static int goodix_check_cfg_8(struct goodix_ts_data *ts,
const struct firmware *cfg);
static int goodix_check_cfg_16(struct goodix_ts_data *ts,
const struct firmware *cfg);
+static void goodix_fix_cfg_8(struct goodix_ts_data *ts);
+static void goodix_fix_cfg_16(struct goodix_ts_data *ts);
static const struct goodix_chip_data gt1x_chip_data = {
.config_addr = GOODIX_GT1X_REG_CONFIG_DATA,
.config_len = GOODIX_CONFIG_MAX_LENGTH,
.check_config = goodix_check_cfg_16,
+ .fix_config = goodix_fix_cfg_16,
};
static const struct goodix_chip_data gt911_chip_data = {
.config_addr = GOODIX_GT9X_REG_CONFIG_DATA,
.config_len = GOODIX_CONFIG_911_LENGTH,
.check_config = goodix_check_cfg_8,
+ .fix_config = goodix_fix_cfg_8,
};
static const struct goodix_chip_data gt967_chip_data = {
.config_addr = GOODIX_GT9X_REG_CONFIG_DATA,
.config_len = GOODIX_CONFIG_967_LENGTH,
.check_config = goodix_check_cfg_8,
+ .fix_config = goodix_fix_cfg_8,
};
static const struct goodix_chip_data gt9x_chip_data = {
.config_addr = GOODIX_GT9X_REG_CONFIG_DATA,
.config_len = GOODIX_CONFIG_MAX_LENGTH,
.check_config = goodix_check_cfg_8,
+ .fix_config = goodix_fix_cfg_8,
};
static const unsigned long goodix_irq_flags[] = {
@@ -442,6 +450,19 @@ static int goodix_check_cfg_8(struct goodix_ts_data *ts,
return 0;
}
+static void goodix_fix_cfg_8(struct goodix_ts_data *ts)
+{
+ int i, raw_cfg_len = ts->chip->config_len - 2;
+ u8 check_sum = 0;
+
+ for (i = 0; i < raw_cfg_len; i++)
+ check_sum += ts->config[i];
+ check_sum = (~check_sum) + 1;
+
+ ts->config[raw_cfg_len] = check_sum;
+ ts->config[raw_cfg_len + 1] = 1;
+}
+
static int goodix_check_cfg_16(struct goodix_ts_data *ts,
const struct firmware *cfg)
{
@@ -466,6 +487,19 @@ static int goodix_check_cfg_16(struct goodix_ts_data *ts,
return 0;
}
+static void goodix_fix_cfg_16(struct goodix_ts_data *ts)
+{
+ int i, raw_cfg_len = ts->chip->config_len - 3;
+ u16 check_sum = 0;
+
+ for (i = 0; i < raw_cfg_len; i += 2)
+ check_sum += get_unaligned_be16(&ts->config[i]);
+ check_sum = (~check_sum) + 1;
+
+ put_unaligned_be16(check_sum, &ts->config[raw_cfg_len]);
+ ts->config[raw_cfg_len + 2] = 1;
+}
+
/**
* goodix_check_cfg - Checks if config fw is valid
*
@@ -828,12 +862,11 @@ static int goodix_get_gpio_config(struct goodix_ts_data *ts)
*/
static void goodix_read_config(struct goodix_ts_data *ts)
{
- u8 config[GOODIX_CONFIG_MAX_LENGTH];
int x_max, y_max;
int error;
error = goodix_i2c_read(ts->client, ts->chip->config_addr,
- config, ts->chip->config_len);
+ ts->config, ts->chip->config_len);
if (error) {
dev_warn(&ts->client->dev, "Error reading config: %d\n",
error);
@@ -842,15 +875,21 @@ static void goodix_read_config(struct goodix_ts_data *ts)
return;
}
- ts->int_trigger_type = config[TRIGGER_LOC] & 0x03;
- ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f;
+ ts->int_trigger_type = ts->config[TRIGGER_LOC] & 0x03;
+ ts->max_touch_num = ts->config[MAX_CONTACTS_LOC] & 0x0f;
- x_max = get_unaligned_le16(&config[RESOLUTION_LOC]);
- y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]);
+ x_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC]);
+ y_max = get_unaligned_le16(&ts->config[RESOLUTION_LOC + 2]);
if (x_max && y_max) {
input_abs_set_max(ts->input_dev, ABS_MT_POSITION_X, x_max - 1);
input_abs_set_max(ts->input_dev, ABS_MT_POSITION_Y, y_max - 1);
}
+
+ /*
+ * Ensure valid checksum and config_fresh bit being set for possible
+ * re-upload of config after suspend/resume.
+ */
+ ts->chip->fix_config(ts);
}
/**
Save a copy of the config in goodix_read_config(), this is a preparation patch for restoring the config if it was lost after a supend/resume cycle. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1786317 BugLink: https://github.com/nexus511/gpd-ubuntu-packages/issues/10 BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=199207 Cc: Dmitry Mastykin <mastichi@gmail.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> --- drivers/input/touchscreen/goodix.c | 51 ++++++++++++++++++++++++++---- 1 file changed, 45 insertions(+), 6 deletions(-)