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[v2,3/4] media: si2157: rework the firmware load logic

Message ID 4b3956d77835c22e2c2c342f6e30a408c956f558.1639049865.git.mchehab+huawei@kernel.org
State Accepted
Commit 7c2d8ee486b9ebd462dcd0aea1969758522f4c3a
Headers show
Series media: si2157: rework firmware load logic | expand

Commit Message

Mauro Carvalho Chehab Dec. 9, 2021, 11:41 a.m. UTC
Loading a firmware file should not be mandatory, as devices
could work with an eeprom firmware, if available.

Yet, using the eeprom firmware could lead into unpredictable
results, so the best is to warn about that.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---

See [PATCH v2 0/4] at: https://lore.kernel.org/all/cover.1639049865.git.mchehab+huawei@kernel.org/

 drivers/media/tuners/si2157.c | 31 ++++++++++++++++++-------------
 1 file changed, 18 insertions(+), 13 deletions(-)
diff mbox series

Patch

diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c
index ed28672c060d..5f4ae8593864 100644
--- a/drivers/media/tuners/si2157.c
+++ b/drivers/media/tuners/si2157.c
@@ -129,8 +129,9 @@  static int si2157_init(struct dvb_frontend *fe)
 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 	struct i2c_client *client = fe->tuner_priv;
 	struct si2157_dev *dev = i2c_get_clientdata(client);
+	bool warn_firmware_not_loaded = false;
 	unsigned int chip_id, xtal_trim;
-	unsigned int fw_required;
+	bool fw_required = true;
 	struct si2157_cmd cmd;
 	const char *fw_name;
 	int ret;
@@ -199,10 +200,6 @@  static int si2157_init(struct dvb_frontend *fe)
 	#define SI2146_A10 ('A' << 24 | 46 << 16 | '1' << 8 | '0' << 0)
 	#define SI2141_A10 ('A' << 24 | 41 << 16 | '1' << 8 | '0' << 0)
 
-	/* assume firmware is required, unless verified not to be */
-	/* only the SI2157_A30 has been verified not to yet */
-	fw_required = true;
-
 	switch (chip_id) {
 	case SI2158_A20:
 	case SI2148_A20:
@@ -212,9 +209,8 @@  static int si2157_init(struct dvb_frontend *fe)
 		fw_name = SI2141_A10_FIRMWARE;
 		break;
 	case SI2157_A30:
-		fw_name = SI2157_A30_FIRMWARE;
 		fw_required = false;
-		break;
+		fallthrough;
 	case SI2177_A30:
 		fw_name = SI2157_A30_FIRMWARE;
 		break;
@@ -237,12 +233,11 @@  static int si2157_init(struct dvb_frontend *fe)
 		goto skip_fw_download;
 
 	ret = si2157_load_firmware(fe, fw_name);
-	if (ret) {
-		if (!fw_required)
-			goto skip_fw_download;
-
-		dev_err(&client->dev, "firmware file '%s' not found\n",
-			fw_name);
+	if (fw_required && ret == -ENOENT)
+		warn_firmware_not_loaded = true;
+	else if (ret < 0) {
+		dev_err(&client->dev, "error %d when loading firmware file '%s'\n",
+			ret, fw_name);
 		goto err;
 	}
 
@@ -263,6 +258,11 @@  static int si2157_init(struct dvb_frontend *fe)
 	if (ret)
 		goto err;
 
+	if (warn_firmware_not_loaded) {
+		dev_warn(&client->dev, "firmware file '%s' not found. Using firmware from eeprom.\n",
+			 fw_name);
+		warn_firmware_not_loaded = false;
+	}
 	dev_info(&client->dev, "firmware version: %c.%c.%d\n",
 			cmd.args[6], cmd.args[7], cmd.args[8]);
 
@@ -298,6 +298,11 @@  static int si2157_init(struct dvb_frontend *fe)
 	return 0;
 
 err:
+	if (warn_firmware_not_loaded)
+		dev_err(&client->dev,
+			"firmware file '%s' not found. Can't continue without a firmware.\n",
+			fw_name);
+
 	dev_dbg(&client->dev, "failed=%d\n", ret);
 	return ret;
 }