[PATCH v2 0/3] drm/bridge: it6505: Fixes bugs

[PATCH v2 0/3] drm/bridge: it6505: Fixes bugs

[allen]

From: allen chen <allen.chen@ite.com.tw>

This series fixes some it6505 driver bugs and improve computing time.

Changes in v2:
  -  Change committe message occure to occur.

allen chen (3):
  drm/bridge: it6505: Modified power sequence
  drm/bridge: it6505: Add i2c api power on check
  drm/bridge: it6505: Modified video clock calculation and video debug
    message

 drivers/gpu/drm/bridge/ite-it6505.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

-- 
2.25.1

[PATCH v2 1/3] drm/bridge: it6505: Modified power sequence

[allen]

From: allen chen <allen.chen@ite.com.tw>

Change power sequence to meet it6505 data sheet requirement when boot on.

Signed-off-by: Pin-Yen Lin <treapking@chromium.org>
Signed-off-by: Allen Chen <allen.chen@ite.com.tw>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
---
 drivers/gpu/drm/bridge/ite-it6505.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
index 2d119e3016b3..aa5e0aa1af85 100644
--- a/drivers/gpu/drm/bridge/ite-it6505.c
+++ b/drivers/gpu/drm/bridge/ite-it6505.c
@@ -3029,7 +3029,7 @@ static int it6505_init_pdata(struct it6505 *it6505)
 		return PTR_ERR(pdata->ovdd);
 	}
 
-	pdata->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+	pdata->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
 	if (IS_ERR(pdata->gpiod_reset)) {
 		dev_err(dev, "gpiod_reset gpio not found");
 		return PTR_ERR(pdata->gpiod_reset);
-- 
2.25.1

Re: [PATCH v2 1/3] drm/bridge: it6505: Modified power sequence

[Robert Foss]

Applied series to drm-misc-next.

[PATCH v2 2/3] drm/bridge: it6505: Add i2c api power on check

[allen]

From: allen chen <allen.chen@ite.com.tw>

Use i2c bus to read/write when it6505 power off will occur i2c error.
Add this check will prevent i2c error when it6505 power off.

Signed-off-by: Pin-Yen Lin <treapking@chromium.org>
Signed-off-by: Allen Chen <allen.chen@ite.com.tw>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
---
 drivers/gpu/drm/bridge/ite-it6505.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
index aa5e0aa1af85..cfd2c3275dc5 100644
--- a/drivers/gpu/drm/bridge/ite-it6505.c
+++ b/drivers/gpu/drm/bridge/ite-it6505.c
@@ -518,6 +518,9 @@ static int it6505_read(struct it6505 *it6505, unsigned int reg_addr)
 	int err;
 	struct device *dev = &it6505->client->dev;
 
+	if (!it6505->powered)
+		return -ENODEV;
+
 	err = regmap_read(it6505->regmap, reg_addr, &value);
 	if (err < 0) {
 		dev_err(dev, "read failed reg[0x%x] err: %d", reg_addr, err);
@@ -533,6 +536,9 @@ static int it6505_write(struct it6505 *it6505, unsigned int reg_addr,
 	int err;
 	struct device *dev = &it6505->client->dev;
 
+	if (!it6505->powered)
+		return -ENODEV;
+
 	err = regmap_write(it6505->regmap, reg_addr, reg_val);
 
 	if (err < 0) {
@@ -550,6 +556,9 @@ static int it6505_set_bits(struct it6505 *it6505, unsigned int reg,
 	int err;
 	struct device *dev = &it6505->client->dev;
 
+	if (!it6505->powered)
+		return -ENODEV;
+
 	err = regmap_update_bits(it6505->regmap, reg, mask, value);
 	if (err < 0) {
 		dev_err(dev, "write reg[0x%x] = 0x%x mask = 0x%x failed err %d",
@@ -2553,13 +2562,12 @@ static int it6505_poweron(struct it6505 *it6505)
 		usleep_range(10000, 20000);
 	}
 
+	it6505->powered = true;
 	it6505_reset_logic(it6505);
 	it6505_int_mask_enable(it6505);
 	it6505_init(it6505);
 	it6505_lane_off(it6505);
 
-	it6505->powered = true;
-
 	return 0;
 }
 
-- 
2.25.1

[PATCH v2 3/3] drm/bridge: it6505: Modified video clock calculation and video debug message

[allen]

From: allen chen <allen.chen@ite.com.tw>

Speed up video clock calculation and remove redundant video debug message.

Signed-off-by: Pin-Yen Lin <treapking@chromium.org>
Signed-off-by: Allen Chen <allen.chen@ite.com.tw>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
---
 drivers/gpu/drm/bridge/ite-it6505.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ite-it6505.c b/drivers/gpu/drm/bridge/ite-it6505.c
index cfd2c3275dc5..11a34ddb60a1 100644
--- a/drivers/gpu/drm/bridge/ite-it6505.c
+++ b/drivers/gpu/drm/bridge/ite-it6505.c
@@ -703,7 +703,7 @@ static void it6505_calc_video_info(struct it6505 *it6505)
 	DRM_DEV_DEBUG_DRIVER(dev, "hactive_start:%d, vactive_start:%d",
 			     hdes, vdes);
 
-	for (i = 0; i < 10; i++) {
+	for (i = 0; i < 3; i++) {
 		it6505_set_bits(it6505, REG_DATA_CTRL0, ENABLE_PCLK_COUNTER,
 				ENABLE_PCLK_COUNTER);
 		usleep_range(10000, 15000);
@@ -720,7 +720,7 @@ static void it6505_calc_video_info(struct it6505 *it6505)
 		return;
 	}
 
-	sum /= 10;
+	sum /= 3;
 	pclk = 13500 * 2048 / sum;
 	it6505->video_info.clock = pclk;
 	it6505->video_info.hdisplay = hdew;
@@ -2344,8 +2344,6 @@ static void it6505_irq_hpd(struct it6505 *it6505)
 
 		if (!it6505_get_video_status(it6505))
 			it6505_video_reset(it6505);
-
-		it6505_calc_video_info(it6505);
 	} else {
 		memset(it6505->dpcd, 0, sizeof(it6505->dpcd));
 
-- 
2.25.1