Input: goodix - make goodix_send_cfg() take a raw buffer as argument

Make goodix_send_cfg() take a raw buffer as argument instead of a
struct firmware *cfg, so that it can also be used to restore the config
on resume if necessary.

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
Reviewed-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20200307121505.3707-10-hdegoede@redhat.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
index 7cca999..958a5d6 100644 (file)
--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c
@@ -73,7 +73,7 @@ enum goodix_irq_pin_access_method {
 struct goodix_chip_data {
        u16 config_addr;
        int config_len;
-       int (*check_config)(struct goodix_ts_data *, const struct firmware *);
+       int (*check_config)(struct goodix_ts_data *ts, const u8 *cfg, int len);
        void (*calc_config_checksum)(struct goodix_ts_data *ts);
 };
 
@@ -103,9 +103,9 @@ struct goodix_ts_data {
 };
 
 static int goodix_check_cfg_8(struct goodix_ts_data *ts,
-                       const struct firmware *cfg);
+                             const u8 *cfg, int len);
 static int goodix_check_cfg_16(struct goodix_ts_data *ts,
-                       const struct firmware *cfg);
+                              const u8 *cfg, int len);
 static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts);
 static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts);
 
@@ -444,22 +444,21 @@ static int goodix_request_irq(struct goodix_ts_data *ts)
                                         ts->irq_flags, ts->client->name, ts);
 }
 
-static int goodix_check_cfg_8(struct goodix_ts_data *ts,
-                       const struct firmware *cfg)
+static int goodix_check_cfg_8(struct goodix_ts_data *ts, const u8 *cfg, int len)
 {
-       int i, raw_cfg_len = cfg->size - 2;
+       int i, raw_cfg_len = len - 2;
        u8 check_sum = 0;
 
        for (i = 0; i < raw_cfg_len; i++)
-               check_sum += cfg->data[i];
+               check_sum += cfg[i];
        check_sum = (~check_sum) + 1;
-       if (check_sum != cfg->data[raw_cfg_len]) {
+       if (check_sum != cfg[raw_cfg_len]) {
                dev_err(&ts->client->dev,
                        "The checksum of the config fw is not correct");
                return -EINVAL;
        }
 
-       if (cfg->data[raw_cfg_len + 1] != 1) {
+       if (cfg[raw_cfg_len + 1] != 1) {
                dev_err(&ts->client->dev,
                        "Config fw must have Config_Fresh register set");
                return -EINVAL;
@@ -481,22 +480,22 @@ static void goodix_calc_cfg_checksum_8(struct goodix_ts_data *ts)
        ts->config[raw_cfg_len + 1] = 1; /* Set "config_fresh" bit */
 }
 
-static int goodix_check_cfg_16(struct goodix_ts_data *ts,
-                       const struct firmware *cfg)
+static int goodix_check_cfg_16(struct goodix_ts_data *ts, const u8 *cfg,
+                              int len)
 {
-       int i, raw_cfg_len = cfg->size - 3;
+       int i, raw_cfg_len = len - 3;
        u16 check_sum = 0;
 
        for (i = 0; i < raw_cfg_len; i += 2)
-               check_sum += get_unaligned_be16(&cfg->data[i]);
+               check_sum += get_unaligned_be16(&cfg[i]);
        check_sum = (~check_sum) + 1;
-       if (check_sum != get_unaligned_be16(&cfg->data[raw_cfg_len])) {
+       if (check_sum != get_unaligned_be16(&cfg[raw_cfg_len])) {
                dev_err(&ts->client->dev,
                        "The checksum of the config fw is not correct");
                return -EINVAL;
        }
 
-       if (cfg->data[raw_cfg_len + 2] != 1) {
+       if (cfg[raw_cfg_len + 2] != 1) {
                dev_err(&ts->client->dev,
                        "Config fw must have Config_Fresh register set");
                return -EINVAL;
@@ -524,17 +523,16 @@ static void goodix_calc_cfg_checksum_16(struct goodix_ts_data *ts)
  * @ts: goodix_ts_data pointer
  * @cfg: firmware config data
  */
-static int goodix_check_cfg(struct goodix_ts_data *ts,
-                           const struct firmware *cfg)
+static int goodix_check_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len)
 {
-       if (cfg->size < GOODIX_CONFIG_MIN_LENGTH ||
-           cfg->size > GOODIX_CONFIG_MAX_LENGTH) {
+       if (len < GOODIX_CONFIG_MIN_LENGTH ||
+           len > GOODIX_CONFIG_MAX_LENGTH) {
                dev_err(&ts->client->dev,
                        "The length of the config fw is not correct");
                return -EINVAL;
        }
 
-       return ts->chip->check_config(ts, cfg);
+       return ts->chip->check_config(ts, cfg, len);
 }
 
 /**
@@ -543,17 +541,15 @@ static int goodix_check_cfg(struct goodix_ts_data *ts,
  * @ts: goodix_ts_data pointer
  * @cfg: config firmware to write to device
  */
-static int goodix_send_cfg(struct goodix_ts_data *ts,
-                          const struct firmware *cfg)
+static int goodix_send_cfg(struct goodix_ts_data *ts, const u8 *cfg, int len)
 {
        int error;
 
-       error = goodix_check_cfg(ts, cfg);
+       error = goodix_check_cfg(ts, cfg, len);
        if (error)
                return error;
 
-       error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg->data,
-                                cfg->size);
+       error = goodix_i2c_write(ts->client, ts->chip->config_addr, cfg, len);
        if (error) {
                dev_err(&ts->client->dev, "Failed to write config data: %d",
                        error);
@@ -1094,7 +1090,7 @@ static void goodix_config_cb(const struct firmware *cfg, void *ctx)
 
        if (cfg) {
                /* send device configuration to the firmware */
-               error = goodix_send_cfg(ts, cfg);
+               error = goodix_send_cfg(ts, cfg->data, cfg->size);
                if (error)
                        goto err_release_cfg;
        }