[rft, PATCH v4 00/16] drm/i915/dsi: 4th attempt to get rid of IOSF GPIO

[rft, PATCH v4 00/16] drm/i915/dsi: 4th attempt to get rid of IOSF GPIO

[Andy Shevchenko]

DSI code for VBT has a set of ugly GPIO hacks, one of which is direct
talking to GPIO IP behind the actual driver's back. A second attempt
to fix that is here.

If I understood correctly, my approach should work in the similar way as
the current IOSF GPIO.

Hans, I believe you have some devices that use this piece of code,
is it possible to give a test run on (one of) them?

In v4:
- fixed compile time errors in patch 14 (Hans, LKP)
- fixed cover letter Subject
- added patch 15 (as suggested by Ville)
- added Ack tag (Jani)

In v3:
- incorporated series by Jani
- incorporated couple of precursor patches by Hans
- added Rb tag for used to be first three patches (Andi)
- rebased on top of the above changes
- fixed indexing for multi-community devices, such as Cherry View

In v2:
- added a few cleanup patches
- reworked to use dynamic GPIO lookup tables
- converted CHV as well

Andy Shevchenko (9):
  drm/i915/dsi: Replace while(1) with one with clear exit condition
  drm/i915/dsi: Get rid of redundant 'else'
  drm/i915/dsi: Replace check with a (missing) MIPI sequence name
  drm/i915/dsi: Extract common soc_gpio_set_value() helper
  drm/i915/dsi: Replace poking of VLV GPIOs behind the driver's back
  drm/i915/dsi: Prepare soc_gpio_set_value() to distinguish GPIO
    communities
  drm/i915/dsi: Replace poking of CHV GPIOs behind the driver's back
  drm/i915/dsi: Combine checks in mipi_exec_gpio()
  drm/i915/iosf: Drop unused APIs

Hans de Goede (2):
  drm/i915/dsi: Remove GPIO lookup table at the end of
    intel_dsi_vbt_gpio_init()
  drm/i915/dsi: Fix wrong initial value for GPIOs in
    bxt_gpio_set_value()

Jani Nikula (5):
  drm/i915/dsi: assume BXT gpio works for non-native GPIO
  drm/i915/dsi: switch mipi_exec_gpio() from dev_priv to i915
  drm/i915/dsi: clarify GPIO exec sequence
  drm/i915/dsi: rename platform specific *_exec_gpio() to
    *_gpio_set_value()
  drm/i915/dsi: bxt/icl GPIO set value do not need gpio source

 drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 355 +++++++------------
 drivers/gpu/drm/i915/vlv_sideband.c          |  17 -
 drivers/gpu/drm/i915/vlv_sideband.h          |   3 -
 3 files changed, 136 insertions(+), 239 deletions(-)

-- 
2.40.0.1.gaa8946217a0b

[PATCH v4 01/16] drm/i915/dsi: assume BXT gpio works for non-native GPIO

[Andy Shevchenko]

From: Jani Nikula <jani.nikula@intel.com>

Purely a guess. Drop the nop function.

Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index 24b2cbcfc1ef..b2c0cc11f8c1 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -372,14 +372,6 @@ static void bxt_exec_gpio(struct intel_connector *connector,
 	gpiod_set_value(gpio_desc, value);
 }
 
-static void icl_exec_gpio(struct intel_connector *connector,
-			  u8 gpio_source, u8 gpio_index, bool value)
-{
-	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
-
-	drm_dbg_kms(&dev_priv->drm, "Skipping ICL GPIO element execution\n");
-}
-
 enum {
 	MIPI_RESET_1 = 0,
 	MIPI_AVDD_EN_1,
@@ -491,7 +483,7 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
 	if (native)
 		icl_native_gpio_set_value(dev_priv, gpio_number, value);
 	else if (DISPLAY_VER(dev_priv) >= 11)
-		icl_exec_gpio(connector, gpio_source, gpio_index, value);
+		bxt_exec_gpio(connector, gpio_source, gpio_index, value);
 	else if (IS_VALLEYVIEW(dev_priv))
 		vlv_exec_gpio(connector, gpio_source, gpio_number, value);
 	else if (IS_CHERRYVIEW(dev_priv))
-- 
2.40.0.1.gaa8946217a0b

[PATCH v4 02/16] drm/i915/dsi: switch mipi_exec_gpio() from dev_priv to i915

[Andy Shevchenko]

From: Jani Nikula <jani.nikula@intel.com>

Follow the contemporary conventions.

Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index b2c0cc11f8c1..8b962f2ac475 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -454,11 +454,11 @@ static void icl_native_gpio_set_value(struct drm_i915_private *dev_priv,
 static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
 {
 	struct drm_device *dev = intel_dsi->base.base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_i915_private *i915 = to_i915(dev);
 	struct intel_connector *connector = intel_dsi->attached_connector;
 	u8 gpio_source, gpio_index = 0, gpio_number;
 	bool value;
-	bool native = DISPLAY_VER(dev_priv) >= 11;
+	bool native = DISPLAY_VER(i915) >= 11;
 
 	if (connector->panel.vbt.dsi.seq_version >= 3)
 		gpio_index = *data++;
@@ -477,16 +477,16 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
 	/* pull up/down */
 	value = *data++ & 1;
 
-	drm_dbg_kms(&dev_priv->drm, "GPIO index %u, number %u, source %u, native %s, set to %s\n",
+	drm_dbg_kms(&i915->drm, "GPIO index %u, number %u, source %u, native %s, set to %s\n",
 		    gpio_index, gpio_number, gpio_source, str_yes_no(native), str_on_off(value));
 
 	if (native)
-		icl_native_gpio_set_value(dev_priv, gpio_number, value);
-	else if (DISPLAY_VER(dev_priv) >= 11)
+		icl_native_gpio_set_value(i915, gpio_number, value);
+	else if (DISPLAY_VER(i915) >= 11)
 		bxt_exec_gpio(connector, gpio_source, gpio_index, value);
-	else if (IS_VALLEYVIEW(dev_priv))
+	else if (IS_VALLEYVIEW(i915))
 		vlv_exec_gpio(connector, gpio_source, gpio_number, value);
-	else if (IS_CHERRYVIEW(dev_priv))
+	else if (IS_CHERRYVIEW(i915))
 		chv_exec_gpio(connector, gpio_source, gpio_number, value);
 	else
 		bxt_exec_gpio(connector, gpio_source, gpio_index, value);
-- 
2.40.0.1.gaa8946217a0b

[PATCH v4 03/16] drm/i915/dsi: clarify GPIO exec sequence

[Andy Shevchenko]

From: Jani Nikula <jani.nikula@intel.com>

With the various sequence versions and pointer increments interleaved,
it's a bit hard to decipher what's going on. Add separate paths for
different sequence versions.

Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 31 +++++++++++---------
 1 file changed, 17 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index 8b962f2ac475..11073efe26c0 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -456,26 +456,29 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
 	struct drm_device *dev = intel_dsi->base.base.dev;
 	struct drm_i915_private *i915 = to_i915(dev);
 	struct intel_connector *connector = intel_dsi->attached_connector;
-	u8 gpio_source, gpio_index = 0, gpio_number;
+	u8 gpio_source = 0, gpio_index = 0, gpio_number;
 	bool value;
+	int size;
 	bool native = DISPLAY_VER(i915) >= 11;
 
-	if (connector->panel.vbt.dsi.seq_version >= 3)
-		gpio_index = *data++;
+	if (connector->panel.vbt.dsi.seq_version >= 3) {
+		size = 3;
 
-	gpio_number = *data++;
+		gpio_index = data[0];
+		gpio_number = data[1];
+		value = data[2] & BIT(0);
 
-	/* gpio source in sequence v2 only */
-	if (connector->panel.vbt.dsi.seq_version == 2)
-		gpio_source = (*data >> 1) & 3;
-	else
-		gpio_source = 0;
+		if (connector->panel.vbt.dsi.seq_version >= 4 && data[2] & BIT(1))
+			native = false;
+	} else {
+		size = 2;
 
-	if (connector->panel.vbt.dsi.seq_version >= 4 && *data & BIT(1))
-		native = false;
+		gpio_number = data[0];
+		value = data[1] & BIT(0);
 
-	/* pull up/down */
-	value = *data++ & 1;
+		if (connector->panel.vbt.dsi.seq_version == 2)
+			gpio_source = (data[1] >> 1) & 3;
+	}
 
 	drm_dbg_kms(&i915->drm, "GPIO index %u, number %u, source %u, native %s, set to %s\n",
 		    gpio_index, gpio_number, gpio_source, str_yes_no(native), str_on_off(value));
@@ -491,7 +494,7 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
 	else
 		bxt_exec_gpio(connector, gpio_source, gpio_index, value);
 
-	return data;
+	return data + size;
 }
 
 #ifdef CONFIG_ACPI
-- 
2.40.0.1.gaa8946217a0b

[PATCH v4 04/16] drm/i915/dsi: rename platform specific *_exec_gpio() to *_gpio_set_value()

[Andy Shevchenko]

From: Jani Nikula <jani.nikula@intel.com>

The lowest level functions are about setting GPIO values, not about
executing any sequences anymore.

Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index 11073efe26c0..f977d63a0ad4 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -243,8 +243,8 @@ static const u8 *mipi_exec_delay(struct intel_dsi *intel_dsi, const u8 *data)
 	return data;
 }
 
-static void vlv_exec_gpio(struct intel_connector *connector,
-			  u8 gpio_source, u8 gpio_index, bool value)
+static void vlv_gpio_set_value(struct intel_connector *connector,
+			       u8 gpio_source, u8 gpio_index, bool value)
 {
 	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 	struct gpio_map *map;
@@ -291,8 +291,8 @@ static void vlv_exec_gpio(struct intel_connector *connector,
 	vlv_iosf_sb_put(dev_priv, BIT(VLV_IOSF_SB_GPIO));
 }
 
-static void chv_exec_gpio(struct intel_connector *connector,
-			  u8 gpio_source, u8 gpio_index, bool value)
+static void chv_gpio_set_value(struct intel_connector *connector,
+			       u8 gpio_source, u8 gpio_index, bool value)
 {
 	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 	u16 cfg0, cfg1;
@@ -345,8 +345,8 @@ static void chv_exec_gpio(struct intel_connector *connector,
 	vlv_iosf_sb_put(dev_priv, BIT(VLV_IOSF_SB_GPIO));
 }
 
-static void bxt_exec_gpio(struct intel_connector *connector,
-			  u8 gpio_source, u8 gpio_index, bool value)
+static void bxt_gpio_set_value(struct intel_connector *connector,
+			       u8 gpio_source, u8 gpio_index, bool value)
 {
 	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 	/* XXX: this table is a quick ugly hack. */
@@ -486,13 +486,13 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
 	if (native)
 		icl_native_gpio_set_value(i915, gpio_number, value);
 	else if (DISPLAY_VER(i915) >= 11)
-		bxt_exec_gpio(connector, gpio_source, gpio_index, value);
+		bxt_gpio_set_value(connector, gpio_source, gpio_index, value);
 	else if (IS_VALLEYVIEW(i915))
-		vlv_exec_gpio(connector, gpio_source, gpio_number, value);
+		vlv_gpio_set_value(connector, gpio_source, gpio_number, value);
 	else if (IS_CHERRYVIEW(i915))
-		chv_exec_gpio(connector, gpio_source, gpio_number, value);
+		chv_gpio_set_value(connector, gpio_source, gpio_number, value);
 	else
-		bxt_exec_gpio(connector, gpio_source, gpio_index, value);
+		bxt_gpio_set_value(connector, gpio_source, gpio_index, value);
 
 	return data + size;
 }
-- 
2.40.0.1.gaa8946217a0b

[PATCH v4 05/16] drm/i915/dsi: bxt/icl GPIO set value do not need gpio source

[Andy Shevchenko]

From: Jani Nikula <jani.nikula@intel.com>

Drop the unused parameter.

Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index f977d63a0ad4..4af43cf3cee0 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -346,7 +346,7 @@ static void chv_gpio_set_value(struct intel_connector *connector,
 }
 
 static void bxt_gpio_set_value(struct intel_connector *connector,
-			       u8 gpio_source, u8 gpio_index, bool value)
+			       u8 gpio_index, bool value)
 {
 	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 	/* XXX: this table is a quick ugly hack. */
@@ -486,13 +486,13 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
 	if (native)
 		icl_native_gpio_set_value(i915, gpio_number, value);
 	else if (DISPLAY_VER(i915) >= 11)
-		bxt_gpio_set_value(connector, gpio_source, gpio_index, value);
+		bxt_gpio_set_value(connector, gpio_index, value);
 	else if (IS_VALLEYVIEW(i915))
 		vlv_gpio_set_value(connector, gpio_source, gpio_number, value);
 	else if (IS_CHERRYVIEW(i915))
 		chv_gpio_set_value(connector, gpio_source, gpio_number, value);
 	else
-		bxt_gpio_set_value(connector, gpio_source, gpio_index, value);
+		bxt_gpio_set_value(connector, gpio_index, value);
 
 	return data + size;
 }
-- 
2.40.0.1.gaa8946217a0b

[PATCH v4 06/16] drm/i915/dsi: Replace while(1) with one with clear exit condition

[Andy Shevchenko]

Move existing condition to while(), so it will be clear on what
circumstances the loop is successfully finishing.

Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index 4af43cf3cee0..290a112f1b63 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -702,13 +702,10 @@ static void intel_dsi_vbt_exec(struct intel_dsi *intel_dsi,
 	if (connector->panel.vbt.dsi.seq_version >= 3)
 		data += 4;
 
-	while (1) {
+	while (*data != MIPI_SEQ_ELEM_END) {
 		u8 operation_byte = *data++;
 		u8 operation_size = 0;
 
-		if (operation_byte == MIPI_SEQ_ELEM_END)
-			break;
-
 		if (operation_byte < ARRAY_SIZE(exec_elem))
 			mipi_elem_exec = exec_elem[operation_byte];
 		else
-- 
2.40.0.1.gaa8946217a0b

[PATCH v4 07/16] drm/i915/dsi: Get rid of redundant 'else'

[Andy Shevchenko]

In the snippets like the following

	if (...)
		return / goto / break / continue ...;
	else
		...

the 'else' is redundant. Get rid of it.

Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 58 ++++++++++----------
 1 file changed, 28 insertions(+), 30 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index 290a112f1b63..4ed5ede9ec5b 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -142,7 +142,7 @@ static enum port intel_dsi_seq_port_to_port(struct intel_dsi *intel_dsi,
 	if (seq_port) {
 		if (intel_dsi->ports & BIT(PORT_B))
 			return PORT_B;
-		else if (intel_dsi->ports & BIT(PORT_C))
+		if (intel_dsi->ports & BIT(PORT_C))
 			return PORT_C;
 	}
 
@@ -670,8 +670,8 @@ static const char *sequence_name(enum mipi_seq seq_id)
 {
 	if (seq_id < ARRAY_SIZE(seq_name) && seq_name[seq_id])
 		return seq_name[seq_id];
-	else
-		return "(unknown)";
+
+	return "(unknown)";
 }
 
 static void intel_dsi_vbt_exec(struct intel_dsi *intel_dsi,
@@ -865,36 +865,34 @@ bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id)
 	 * multiply by 100 to preserve remainder
 	 */
 	if (intel_dsi->video_mode == BURST_MODE) {
-		if (mipi_config->target_burst_mode_freq) {
-			u32 bitrate = intel_dsi_bitrate(intel_dsi);
+		u32 bitrate;
 
-			/*
-			 * Sometimes the VBT contains a slightly lower clock,
-			 * then the bitrate we have calculated, in this case
-			 * just replace it with the calculated bitrate.
-			 */
-			if (mipi_config->target_burst_mode_freq < bitrate &&
-			    intel_fuzzy_clock_check(
-					mipi_config->target_burst_mode_freq,
-					bitrate))
-				mipi_config->target_burst_mode_freq = bitrate;
-
-			if (mipi_config->target_burst_mode_freq < bitrate) {
-				drm_err(&dev_priv->drm,
-					"Burst mode freq is less than computed\n");
-				return false;
-			}
-
-			burst_mode_ratio = DIV_ROUND_UP(
-				mipi_config->target_burst_mode_freq * 100,
-				bitrate);
-
-			intel_dsi->pclk = DIV_ROUND_UP(intel_dsi->pclk * burst_mode_ratio, 100);
-		} else {
-			drm_err(&dev_priv->drm,
-				"Burst mode target is not set\n");
+		if (mipi_config->target_burst_mode_freq == 0) {
+			drm_err(&dev_priv->drm, "Burst mode target is not set\n");
 			return false;
 		}
+
+		bitrate = intel_dsi_bitrate(intel_dsi);
+
+		/*
+		 * Sometimes the VBT contains a slightly lower clock, then
+		 * the bitrate we have calculated, in this case just replace it
+		 * with the calculated bitrate.
+		 */
+		if (mipi_config->target_burst_mode_freq < bitrate &&
+		    intel_fuzzy_clock_check(mipi_config->target_burst_mode_freq,
+					    bitrate))
+			mipi_config->target_burst_mode_freq = bitrate;
+
+		if (mipi_config->target_burst_mode_freq < bitrate) {
+			drm_err(&dev_priv->drm, "Burst mode freq is less than computed\n");
+			return false;
+		}
+
+		burst_mode_ratio =
+			DIV_ROUND_UP(mipi_config->target_burst_mode_freq * 100, bitrate);
+
+		intel_dsi->pclk = DIV_ROUND_UP(intel_dsi->pclk * burst_mode_ratio, 100);
 	} else
 		burst_mode_ratio = 100;
 
-- 
2.40.0.1.gaa8946217a0b

[PATCH v4 08/16] drm/i915/dsi: Replace check with a (missing) MIPI sequence name

[Andy Shevchenko]

Names of the MIPI sequence steps are sequential and defined, no
need to check for the gaps. However in seq_name the MIPI_SEQ_END
is missing. Add it there, and drop unneeded NULL check in
sequence_name().

Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index 4ed5ede9ec5b..d270437217b3 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -653,6 +653,7 @@ static const fn_mipi_elem_exec exec_elem[] = {
  */
 
 static const char * const seq_name[] = {
+	[MIPI_SEQ_END] = "MIPI_SEQ_END",
 	[MIPI_SEQ_DEASSERT_RESET] = "MIPI_SEQ_DEASSERT_RESET",
 	[MIPI_SEQ_INIT_OTP] = "MIPI_SEQ_INIT_OTP",
 	[MIPI_SEQ_DISPLAY_ON] = "MIPI_SEQ_DISPLAY_ON",
@@ -668,7 +669,7 @@ static const char * const seq_name[] = {
 
 static const char *sequence_name(enum mipi_seq seq_id)
 {
-	if (seq_id < ARRAY_SIZE(seq_name) && seq_name[seq_id])
+	if (seq_id < ARRAY_SIZE(seq_name))
 		return seq_name[seq_id];
 
 	return "(unknown)";
-- 
2.40.0.1.gaa8946217a0b

[PATCH v4 09/16] drm/i915/dsi: Remove GPIO lookup table at the end of intel_dsi_vbt_gpio_init()

[Andy Shevchenko]

From: Hans de Goede <hdegoede@redhat.com>

To properly deal with GPIOs used in MIPI panel sequences a temporary
GPIO lookup will be used. Since there can only be 1 GPIO lookup table
for the "0000:00:02.0" device this will not work if the GPIO lookup
table used by intel_dsi_vbt_gpio_init() is still registered.

After getting the "backlight" and "panel" GPIOs the lookup table
registered by intel_dsi_vbt_gpio_init() is no longer necessary,
remove it so that another temporary lookup-table for the "0000:00:02.0"
device can be added.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 25 +++++++-------------
 1 file changed, 9 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index d270437217b3..8e6beef90e5e 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -955,6 +955,7 @@ void intel_dsi_vbt_gpio_init(struct intel_dsi *intel_dsi, bool panel_is_on)
 	struct intel_connector *connector = intel_dsi->attached_connector;
 	struct mipi_config *mipi_config = connector->panel.vbt.dsi.config;
 	enum gpiod_flags flags = panel_is_on ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW;
+	struct gpiod_lookup_table *gpiod_lookup_table = NULL;
 	bool want_backlight_gpio = false;
 	bool want_panel_gpio = false;
 	struct pinctrl *pinctrl;
@@ -962,12 +963,12 @@ void intel_dsi_vbt_gpio_init(struct intel_dsi *intel_dsi, bool panel_is_on)
 
 	if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
 	    mipi_config->pwm_blc == PPS_BLC_PMIC) {
-		gpiod_add_lookup_table(&pmic_panel_gpio_table);
+		gpiod_lookup_table = &pmic_panel_gpio_table;
 		want_panel_gpio = true;
 	}
 
 	if (IS_VALLEYVIEW(dev_priv) && mipi_config->pwm_blc == PPS_BLC_SOC) {
-		gpiod_add_lookup_table(&soc_panel_gpio_table);
+		gpiod_lookup_table = &soc_panel_gpio_table;
 		want_panel_gpio = true;
 		want_backlight_gpio = true;
 
@@ -984,6 +985,9 @@ void intel_dsi_vbt_gpio_init(struct intel_dsi *intel_dsi, bool panel_is_on)
 				"Failed to set pinmux to PWM\n");
 	}
 
+	if (gpiod_lookup_table)
+		gpiod_add_lookup_table(gpiod_lookup_table);
+
 	if (want_panel_gpio) {
 		intel_dsi->gpio_panel = gpiod_get(dev->dev, "panel", flags);
 		if (IS_ERR(intel_dsi->gpio_panel)) {
@@ -1002,15 +1006,13 @@ void intel_dsi_vbt_gpio_init(struct intel_dsi *intel_dsi, bool panel_is_on)
 			intel_dsi->gpio_backlight = NULL;
 		}
 	}
+
+	if (gpiod_lookup_table)
+		gpiod_remove_lookup_table(gpiod_lookup_table);
 }
 
 void intel_dsi_vbt_gpio_cleanup(struct intel_dsi *intel_dsi)
 {
-	struct drm_device *dev = intel_dsi->base.base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct intel_connector *connector = intel_dsi->attached_connector;
-	struct mipi_config *mipi_config = connector->panel.vbt.dsi.config;
-
 	if (intel_dsi->gpio_panel) {
 		gpiod_put(intel_dsi->gpio_panel);
 		intel_dsi->gpio_panel = NULL;
@@ -1020,13 +1022,4 @@ void intel_dsi_vbt_gpio_cleanup(struct intel_dsi *intel_dsi)
 		gpiod_put(intel_dsi->gpio_backlight);
 		intel_dsi->gpio_backlight = NULL;
 	}
-
-	if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
-	    mipi_config->pwm_blc == PPS_BLC_PMIC)
-		gpiod_remove_lookup_table(&pmic_panel_gpio_table);
-
-	if (IS_VALLEYVIEW(dev_priv) && mipi_config->pwm_blc == PPS_BLC_SOC) {
-		pinctrl_unregister_mappings(soc_pwm_pinctrl_map);
-		gpiod_remove_lookup_table(&soc_panel_gpio_table);
-	}
 }
-- 
2.40.0.1.gaa8946217a0b

[PATCH v4 10/16] drm/i915/dsi: Fix wrong initial value for GPIOs in bxt_gpio_set_value()

[Andy Shevchenko]

From: Hans de Goede <hdegoede@redhat.com>

Fix wrong initial value for GPIOs in bxt_gpio_set_value().

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index 8e6beef90e5e..0f9da0168a7b 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -356,9 +356,7 @@ static void bxt_gpio_set_value(struct intel_connector *connector,
 	if (!gpio_desc) {
 		gpio_desc = devm_gpiod_get_index(dev_priv->drm.dev,
 						 NULL, gpio_index,
-						 value ? GPIOD_OUT_LOW :
-						 GPIOD_OUT_HIGH);
-
+						 value ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW);
 		if (IS_ERR_OR_NULL(gpio_desc)) {
 			drm_err(&dev_priv->drm,
 				"GPIO index %u request failed (%ld)\n",
-- 
2.40.0.1.gaa8946217a0b

[PATCH v4 11/16] drm/i915/dsi: Extract common soc_gpio_set_value() helper

[Andy Shevchenko]

Extract a common soc_gpio_set_value() helper that may be used by a few SoCs.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 46 +++++++++++---------
 1 file changed, 26 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index 0f9da0168a7b..9847a92fdfc3 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -243,6 +243,31 @@ static const u8 *mipi_exec_delay(struct intel_dsi *intel_dsi, const u8 *data)
 	return data;
 }
 
+static void soc_gpio_set_value(struct intel_connector *connector, const char *con_id,
+			       u8 gpio_index, bool value)
+{
+	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+	/* XXX: this table is a quick ugly hack. */
+	static struct gpio_desc *soc_gpio_table[U8_MAX + 1];
+	struct gpio_desc *gpio_desc = soc_gpio_table[gpio_index];
+
+	if (gpio_desc) {
+		gpiod_set_value(gpio_desc, value);
+	} else {
+		gpio_desc = devm_gpiod_get_index(dev_priv->drm.dev,
+						 con_id, gpio_index,
+						 value ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW);
+		if (IS_ERR(gpio_desc)) {
+			drm_err(&dev_priv->drm,
+				"GPIO index %u request failed (%pe)\n",
+				gpio_index, gpio_desc);
+			return;
+		}
+
+		soc_gpio_table[gpio_index] = gpio_desc;
+	}
+}
+
 static void vlv_gpio_set_value(struct intel_connector *connector,
 			       u8 gpio_source, u8 gpio_index, bool value)
 {
@@ -348,26 +373,7 @@ static void chv_gpio_set_value(struct intel_connector *connector,
 static void bxt_gpio_set_value(struct intel_connector *connector,
 			       u8 gpio_index, bool value)
 {
-	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
-	/* XXX: this table is a quick ugly hack. */
-	static struct gpio_desc *bxt_gpio_table[U8_MAX + 1];
-	struct gpio_desc *gpio_desc = bxt_gpio_table[gpio_index];
-
-	if (!gpio_desc) {
-		gpio_desc = devm_gpiod_get_index(dev_priv->drm.dev,
-						 NULL, gpio_index,
-						 value ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW);
-		if (IS_ERR_OR_NULL(gpio_desc)) {
-			drm_err(&dev_priv->drm,
-				"GPIO index %u request failed (%ld)\n",
-				gpio_index, PTR_ERR(gpio_desc));
-			return;
-		}
-
-		bxt_gpio_table[gpio_index] = gpio_desc;
-	}
-
-	gpiod_set_value(gpio_desc, value);
+	soc_gpio_set_value(connector, NULL, gpio_index, value);
 }
 
 enum {
-- 
2.40.0.1.gaa8946217a0b

[PATCH v4 12/16] drm/i915/dsi: Replace poking of VLV GPIOs behind the driver's back

[Andy Shevchenko]

It's a dirty hack in the driver that pokes GPIO registers behind
the driver's back. Moreoever it might be problematic as simultaneous
I/O may hang the system, see the commit 40ecab551232 ("pinctrl:
baytrail: Really serialize all register accesses") for the details.
Taking all this into consideration replace the hack with proper
GPIO APIs being used.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 98 ++++++--------------
 1 file changed, 28 insertions(+), 70 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index 9847a92fdfc3..552bc6564d79 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -55,43 +55,6 @@
 #define MIPI_VIRTUAL_CHANNEL_SHIFT	1
 #define MIPI_PORT_SHIFT			3
 
-/* base offsets for gpio pads */
-#define VLV_GPIO_NC_0_HV_DDI0_HPD	0x4130
-#define VLV_GPIO_NC_1_HV_DDI0_DDC_SDA	0x4120
-#define VLV_GPIO_NC_2_HV_DDI0_DDC_SCL	0x4110
-#define VLV_GPIO_NC_3_PANEL0_VDDEN	0x4140
-#define VLV_GPIO_NC_4_PANEL0_BKLTEN	0x4150
-#define VLV_GPIO_NC_5_PANEL0_BKLTCTL	0x4160
-#define VLV_GPIO_NC_6_HV_DDI1_HPD	0x4180
-#define VLV_GPIO_NC_7_HV_DDI1_DDC_SDA	0x4190
-#define VLV_GPIO_NC_8_HV_DDI1_DDC_SCL	0x4170
-#define VLV_GPIO_NC_9_PANEL1_VDDEN	0x4100
-#define VLV_GPIO_NC_10_PANEL1_BKLTEN	0x40E0
-#define VLV_GPIO_NC_11_PANEL1_BKLTCTL	0x40F0
-
-#define VLV_GPIO_PCONF0(base_offset)	(base_offset)
-#define VLV_GPIO_PAD_VAL(base_offset)	((base_offset) + 8)
-
-struct gpio_map {
-	u16 base_offset;
-	bool init;
-};
-
-static struct gpio_map vlv_gpio_table[] = {
-	{ VLV_GPIO_NC_0_HV_DDI0_HPD },
-	{ VLV_GPIO_NC_1_HV_DDI0_DDC_SDA },
-	{ VLV_GPIO_NC_2_HV_DDI0_DDC_SCL },
-	{ VLV_GPIO_NC_3_PANEL0_VDDEN },
-	{ VLV_GPIO_NC_4_PANEL0_BKLTEN },
-	{ VLV_GPIO_NC_5_PANEL0_BKLTCTL },
-	{ VLV_GPIO_NC_6_HV_DDI1_HPD },
-	{ VLV_GPIO_NC_7_HV_DDI1_DDC_SDA },
-	{ VLV_GPIO_NC_8_HV_DDI1_DDC_SCL },
-	{ VLV_GPIO_NC_9_PANEL1_VDDEN },
-	{ VLV_GPIO_NC_10_PANEL1_BKLTEN },
-	{ VLV_GPIO_NC_11_PANEL1_BKLTCTL },
-};
-
 struct i2c_adapter_lookup {
 	u16 slave_addr;
 	struct intel_dsi *intel_dsi;
@@ -268,52 +231,47 @@ static void soc_gpio_set_value(struct intel_connector *connector, const char *co
 	}
 }
 
+static void soc_opaque_gpio_set_value(struct intel_connector *connector,
+				      const char *chip, const char *con_id,
+				      u8 gpio_index, bool value)
+{
+	struct gpiod_lookup_table *lookup;
+
+	lookup = kzalloc(struct_size(lookup, table, 2), GFP_KERNEL);
+	if (!lookup)
+		return;
+
+	lookup->dev_id = "0000:00:02.0";
+	lookup->table[0] =
+		GPIO_LOOKUP_IDX(chip, gpio_index, con_id, gpio_index, GPIO_ACTIVE_HIGH);
+
+	gpiod_add_lookup_table(lookup);
+
+	soc_gpio_set_value(connector, con_id, gpio_index, value);
+
+	gpiod_remove_lookup_table(lookup);
+	kfree(lookup);
+}
+
 static void vlv_gpio_set_value(struct intel_connector *connector,
 			       u8 gpio_source, u8 gpio_index, bool value)
 {
 	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
-	struct gpio_map *map;
-	u16 pconf0, padval;
-	u32 tmp;
-	u8 port;
 
-	if (gpio_index >= ARRAY_SIZE(vlv_gpio_table)) {
-		drm_dbg_kms(&dev_priv->drm, "unknown gpio index %u\n",
-			    gpio_index);
-		return;
-	}
-
-	map = &vlv_gpio_table[gpio_index];
-
-	if (connector->panel.vbt.dsi.seq_version >= 3) {
-		/* XXX: this assumes vlv_gpio_table only has NC GPIOs. */
-		port = IOSF_PORT_GPIO_NC;
-	} else {
-		if (gpio_source == 0) {
-			port = IOSF_PORT_GPIO_NC;
-		} else if (gpio_source == 1) {
+	/* XXX: this assumes vlv_gpio_table only has NC GPIOs. */
+	if (connector->panel.vbt.dsi.seq_version < 3) {
+		if (gpio_source == 1) {
 			drm_dbg_kms(&dev_priv->drm, "SC gpio not supported\n");
 			return;
-		} else {
+		}
+		if (gpio_source > 1) {
 			drm_dbg_kms(&dev_priv->drm,
 				    "unknown gpio source %u\n", gpio_source);
 			return;
 		}
 	}
 
-	pconf0 = VLV_GPIO_PCONF0(map->base_offset);
-	padval = VLV_GPIO_PAD_VAL(map->base_offset);
-
-	vlv_iosf_sb_get(dev_priv, BIT(VLV_IOSF_SB_GPIO));
-	if (!map->init) {
-		/* FIXME: remove constant below */
-		vlv_iosf_sb_write(dev_priv, port, pconf0, 0x2000CC00);
-		map->init = true;
-	}
-
-	tmp = 0x4 | value;
-	vlv_iosf_sb_write(dev_priv, port, padval, tmp);
-	vlv_iosf_sb_put(dev_priv, BIT(VLV_IOSF_SB_GPIO));
+	soc_opaque_gpio_set_value(connector, "INT33FC:01", "Panel N", gpio_index, value);
 }
 
 static void chv_gpio_set_value(struct intel_connector *connector,
-- 
2.40.0.1.gaa8946217a0b

[PATCH v4 13/16] drm/i915/dsi: Prepare soc_gpio_set_value() to distinguish GPIO communities

[Andy Shevchenko]

Currently soc_gpio_set_value() supports only a single indexing for GPIO pin.
For CHV case, for example, we will need to distinguish community based index
from the one that VBT is using. Introduce an additional parameter to
soc_gpio_set_value() and its callers.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index 552bc6564d79..b1736c1301ea 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -206,8 +206,8 @@ static const u8 *mipi_exec_delay(struct intel_dsi *intel_dsi, const u8 *data)
 	return data;
 }
 
-static void soc_gpio_set_value(struct intel_connector *connector, const char *con_id,
-			       u8 gpio_index, bool value)
+static void soc_gpio_set_value(struct intel_connector *connector, u8 gpio_index,
+			       const char *con_id, u8 idx, bool value)
 {
 	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 	/* XXX: this table is a quick ugly hack. */
@@ -217,8 +217,7 @@ static void soc_gpio_set_value(struct intel_connector *connector, const char *co
 	if (gpio_desc) {
 		gpiod_set_value(gpio_desc, value);
 	} else {
-		gpio_desc = devm_gpiod_get_index(dev_priv->drm.dev,
-						 con_id, gpio_index,
+		gpio_desc = devm_gpiod_get_index(dev_priv->drm.dev, con_id, idx,
 						 value ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW);
 		if (IS_ERR(gpio_desc)) {
 			drm_err(&dev_priv->drm,
@@ -232,8 +231,8 @@ static void soc_gpio_set_value(struct intel_connector *connector, const char *co
 }
 
 static void soc_opaque_gpio_set_value(struct intel_connector *connector,
-				      const char *chip, const char *con_id,
-				      u8 gpio_index, bool value)
+				      u8 gpio_index, const char *chip,
+				      const char *con_id, u8 idx, bool value)
 {
 	struct gpiod_lookup_table *lookup;
 
@@ -243,11 +242,11 @@ static void soc_opaque_gpio_set_value(struct intel_connector *connector,
 
 	lookup->dev_id = "0000:00:02.0";
 	lookup->table[0] =
-		GPIO_LOOKUP_IDX(chip, gpio_index, con_id, gpio_index, GPIO_ACTIVE_HIGH);
+		GPIO_LOOKUP_IDX(chip, idx, con_id, idx, GPIO_ACTIVE_HIGH);
 
 	gpiod_add_lookup_table(lookup);
 
-	soc_gpio_set_value(connector, con_id, gpio_index, value);
+	soc_gpio_set_value(connector, gpio_index, con_id, idx, value);
 
 	gpiod_remove_lookup_table(lookup);
 	kfree(lookup);
@@ -271,7 +270,8 @@ static void vlv_gpio_set_value(struct intel_connector *connector,
 		}
 	}
 
-	soc_opaque_gpio_set_value(connector, "INT33FC:01", "Panel N", gpio_index, value);
+	soc_opaque_gpio_set_value(connector, gpio_index,
+				  "INT33FC:01", "Panel N", gpio_index, value);
 }
 
 static void chv_gpio_set_value(struct intel_connector *connector,
@@ -331,7 +331,7 @@ static void chv_gpio_set_value(struct intel_connector *connector,
 static void bxt_gpio_set_value(struct intel_connector *connector,
 			       u8 gpio_index, bool value)
 {
-	soc_gpio_set_value(connector, NULL, gpio_index, value);
+	soc_gpio_set_value(connector, gpio_index, NULL, gpio_index, value);
 }
 
 enum {
-- 
2.40.0.1.gaa8946217a0b

[PATCH v4 14/16] drm/i915/dsi: Replace poking of CHV GPIOs behind the driver's back

[Andy Shevchenko]

It's a dirty hack in the driver that pokes GPIO registers behind
the driver's back. Moreoever it might be problematic as simultaneous
I/O may hang the system, see the commit 0bd50d719b00 ("pinctrl:
cherryview: prevent concurrent access to GPIO controllers") for
the details. Taking all this into consideration replace the hack
with proper GPIO APIs being used.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 47 +++++---------------
 1 file changed, 10 insertions(+), 37 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index b1736c1301ea..9c6946ccb193 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -66,19 +66,6 @@ struct i2c_adapter_lookup {
 #define CHV_GPIO_IDX_START_SW		100
 #define CHV_GPIO_IDX_START_SE		198
 
-#define CHV_VBT_MAX_PINS_PER_FMLY	15
-
-#define CHV_GPIO_PAD_CFG0(f, i)		(0x4400 + (f) * 0x400 + (i) * 8)
-#define  CHV_GPIO_GPIOEN		(1 << 15)
-#define  CHV_GPIO_GPIOCFG_GPIO		(0 << 8)
-#define  CHV_GPIO_GPIOCFG_GPO		(1 << 8)
-#define  CHV_GPIO_GPIOCFG_GPI		(2 << 8)
-#define  CHV_GPIO_GPIOCFG_HIZ		(3 << 8)
-#define  CHV_GPIO_GPIOTXSTATE(state)	((!!(state)) << 1)
-
-#define CHV_GPIO_PAD_CFG1(f, i)		(0x4400 + (f) * 0x400 + (i) * 8 + 4)
-#define  CHV_GPIO_CFGLOCK		(1 << 31)
-
 /* ICL DSI Display GPIO Pins */
 #define  ICL_GPIO_DDSP_HPD_A		0
 #define  ICL_GPIO_L_VDDEN_1		1
@@ -278,23 +265,21 @@ static void chv_gpio_set_value(struct intel_connector *connector,
 			       u8 gpio_source, u8 gpio_index, bool value)
 {
 	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
-	u16 cfg0, cfg1;
-	u16 family_num;
-	u8 port;
 
 	if (connector->panel.vbt.dsi.seq_version >= 3) {
 		if (gpio_index >= CHV_GPIO_IDX_START_SE) {
 			/* XXX: it's unclear whether 255->57 is part of SE. */
-			gpio_index -= CHV_GPIO_IDX_START_SE;
-			port = CHV_IOSF_PORT_GPIO_SE;
+			soc_opaque_gpio_set_value(connector, gpio_index, "INT33FF:03", "Panel SE",
+						  gpio_index - CHV_GPIO_IDX_START_SE, value);
 		} else if (gpio_index >= CHV_GPIO_IDX_START_SW) {
-			gpio_index -= CHV_GPIO_IDX_START_SW;
-			port = CHV_IOSF_PORT_GPIO_SW;
+			soc_opaque_gpio_set_value(connector, gpio_index, "INT33FF:00", "Panel SW",
+						  gpio_index - CHV_GPIO_IDX_START_SW, value);
 		} else if (gpio_index >= CHV_GPIO_IDX_START_E) {
-			gpio_index -= CHV_GPIO_IDX_START_E;
-			port = CHV_IOSF_PORT_GPIO_E;
+			soc_opaque_gpio_set_value(connector, gpio_index, "INT33FF:02", "Panel E",
+						  gpio_index - CHV_GPIO_IDX_START_E, value);
 		} else {
-			port = CHV_IOSF_PORT_GPIO_N;
+			soc_opaque_gpio_set_value(connector, gpio_index, "INT33FF:01", "Panel N",
+						  gpio_index - CHV_GPIO_IDX_START_N, value);
 		}
 	} else {
 		/* XXX: The spec is unclear about CHV GPIO on seq v2 */
@@ -311,21 +296,9 @@ static void chv_gpio_set_value(struct intel_connector *connector,
 			return;
 		}
 
-		port = CHV_IOSF_PORT_GPIO_N;
+		soc_opaque_gpio_set_value(connector, gpio_index, "INT33FF:01", "Panel N",
+					  gpio_index - CHV_GPIO_IDX_START_N, value);
 	}
-
-	family_num = gpio_index / CHV_VBT_MAX_PINS_PER_FMLY;
-	gpio_index = gpio_index % CHV_VBT_MAX_PINS_PER_FMLY;
-
-	cfg0 = CHV_GPIO_PAD_CFG0(family_num, gpio_index);
-	cfg1 = CHV_GPIO_PAD_CFG1(family_num, gpio_index);
-
-	vlv_iosf_sb_get(dev_priv, BIT(VLV_IOSF_SB_GPIO));
-	vlv_iosf_sb_write(dev_priv, port, cfg1, 0);
-	vlv_iosf_sb_write(dev_priv, port, cfg0,
-			  CHV_GPIO_GPIOEN | CHV_GPIO_GPIOCFG_GPO |
-			  CHV_GPIO_GPIOTXSTATE(value));
-	vlv_iosf_sb_put(dev_priv, BIT(VLV_IOSF_SB_GPIO));
 }
 
 static void bxt_gpio_set_value(struct intel_connector *connector,
-- 
2.40.0.1.gaa8946217a0b

[PATCH v4 15/16] drm/i915/dsi: Combine checks in mipi_exec_gpio()

[Andy Shevchenko]

For a couple of cases the branches call the same bxt_gpio_set_value().
As Ville suggested they can be combined by dropping the DISPLAY_VER()
check from Gen 11 to Gen 9. Do it that way.

Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index 9c6946ccb193..275d0218394c 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -420,14 +420,12 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
 
 	if (native)
 		icl_native_gpio_set_value(i915, gpio_number, value);
-	else if (DISPLAY_VER(i915) >= 11)
+	else if (DISPLAY_VER(i915) >= 9)
 		bxt_gpio_set_value(connector, gpio_index, value);
 	else if (IS_VALLEYVIEW(i915))
 		vlv_gpio_set_value(connector, gpio_source, gpio_number, value);
 	else if (IS_CHERRYVIEW(i915))
 		chv_gpio_set_value(connector, gpio_source, gpio_number, value);
-	else
-		bxt_gpio_set_value(connector, gpio_index, value);
 
 	return data + size;
 }
-- 
2.40.0.1.gaa8946217a0b

[PATCH v4 16/16] drm/i915/iosf: Drop unused APIs

[Andy Shevchenko]

Drop unused vlv_iosf_sb_read() and vlv_iosf_sb_write().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/vlv_sideband.c | 17 -----------------
 drivers/gpu/drm/i915/vlv_sideband.h |  3 ---
 2 files changed, 20 deletions(-)

diff --git a/drivers/gpu/drm/i915/vlv_sideband.c b/drivers/gpu/drm/i915/vlv_sideband.c
index b98dec3ad817..13b644958e38 100644
--- a/drivers/gpu/drm/i915/vlv_sideband.c
+++ b/drivers/gpu/drm/i915/vlv_sideband.c
@@ -166,23 +166,6 @@ u32 vlv_nc_read(struct drm_i915_private *i915, u8 addr)
 	return val;
 }
 
-u32 vlv_iosf_sb_read(struct drm_i915_private *i915, u8 port, u32 reg)
-{
-	u32 val = 0;
-
-	vlv_sideband_rw(i915, PCI_DEVFN(0, 0), port,
-			SB_CRRDDA_NP, reg, &val);
-
-	return val;
-}
-
-void vlv_iosf_sb_write(struct drm_i915_private *i915,
-		       u8 port, u32 reg, u32 val)
-{
-	vlv_sideband_rw(i915, PCI_DEVFN(0, 0), port,
-			SB_CRWRDA_NP, reg, &val);
-}
-
 u32 vlv_cck_read(struct drm_i915_private *i915, u32 reg)
 {
 	u32 val = 0;
diff --git a/drivers/gpu/drm/i915/vlv_sideband.h b/drivers/gpu/drm/i915/vlv_sideband.h
index 9ce283d96b80..8b4495e14bce 100644
--- a/drivers/gpu/drm/i915/vlv_sideband.h
+++ b/drivers/gpu/drm/i915/vlv_sideband.h
@@ -26,9 +26,6 @@ enum {
 };
 
 void vlv_iosf_sb_get(struct drm_i915_private *i915, unsigned long ports);
-u32 vlv_iosf_sb_read(struct drm_i915_private *i915, u8 port, u32 reg);
-void vlv_iosf_sb_write(struct drm_i915_private *i915,
-		       u8 port, u32 reg, u32 val);
 void vlv_iosf_sb_put(struct drm_i915_private *i915, unsigned long ports);
 
 static inline void vlv_bunit_get(struct drm_i915_private *i915)
-- 
2.40.0.1.gaa8946217a0b

Re: [rft, PATCH v4 00/16] drm/i915/dsi: 4th attempt to get rid of IOSF GPIO

[Hans de Goede]

Hi,

On 11/3/23 21:18, Andy Shevchenko wrote:
> DSI code for VBT has a set of ugly GPIO hacks, one of which is direct
> talking to GPIO IP behind the actual driver's back. A second attempt
> to fix that is here.
> 
> If I understood correctly, my approach should work in the similar way as
> the current IOSF GPIO.
> 
> Hans, I believe you have some devices that use this piece of code,
> is it possible to give a test run on (one of) them?

Ok, this now has been testen on both a BYT and a CHT device which
actually use GPIO controls in their MIPI sequences so this
series is:

Tested-by: Hans de Goede <hdegoede@redhat.com>

And the code of the entire series also looks good to me:

Reviewed-by: Hans de Goede <hdegoede@redhat.com>

for the series.

Regards,

Hans




> In v4:
> - fixed compile time errors in patch 14 (Hans, LKP)
> - fixed cover letter Subject
> - added patch 15 (as suggested by Ville)
> - added Ack tag (Jani)
> 
> In v3:
> - incorporated series by Jani
> - incorporated couple of precursor patches by Hans
> - added Rb tag for used to be first three patches (Andi)
> - rebased on top of the above changes
> - fixed indexing for multi-community devices, such as Cherry View
> 
> In v2:
> - added a few cleanup patches
> - reworked to use dynamic GPIO lookup tables
> - converted CHV as well
> 
> Andy Shevchenko (9):
>   drm/i915/dsi: Replace while(1) with one with clear exit condition
>   drm/i915/dsi: Get rid of redundant 'else'
>   drm/i915/dsi: Replace check with a (missing) MIPI sequence name
>   drm/i915/dsi: Extract common soc_gpio_set_value() helper
>   drm/i915/dsi: Replace poking of VLV GPIOs behind the driver's back
>   drm/i915/dsi: Prepare soc_gpio_set_value() to distinguish GPIO
>     communities
>   drm/i915/dsi: Replace poking of CHV GPIOs behind the driver's back
>   drm/i915/dsi: Combine checks in mipi_exec_gpio()
>   drm/i915/iosf: Drop unused APIs
> 
> Hans de Goede (2):
>   drm/i915/dsi: Remove GPIO lookup table at the end of
>     intel_dsi_vbt_gpio_init()
>   drm/i915/dsi: Fix wrong initial value for GPIOs in
>     bxt_gpio_set_value()
> 
> Jani Nikula (5):
>   drm/i915/dsi: assume BXT gpio works for non-native GPIO
>   drm/i915/dsi: switch mipi_exec_gpio() from dev_priv to i915
>   drm/i915/dsi: clarify GPIO exec sequence
>   drm/i915/dsi: rename platform specific *_exec_gpio() to
>     *_gpio_set_value()
>   drm/i915/dsi: bxt/icl GPIO set value do not need gpio source
> 
>  drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 355 +++++++------------
>  drivers/gpu/drm/i915/vlv_sideband.c          |  17 -
>  drivers/gpu/drm/i915/vlv_sideband.h          |   3 -
>  3 files changed, 136 insertions(+), 239 deletions(-)
> 

Re: [rft, PATCH v4 00/16] drm/i915/dsi: 4th attempt to get rid of IOSF GPIO

[Jani Nikula]

On Thu, 16 Nov 2023, Hans de Goede <hdegoede@redhat.com> wrote:
> Ok, this now has been testen on both a BYT and a CHT device which
> actually use GPIO controls in their MIPI sequences so this
> series is:
>
> Tested-by: Hans de Goede <hdegoede@redhat.com>
>
> And the code of the entire series also looks good to me:
>
> Reviewed-by: Hans de Goede <hdegoede@redhat.com>
>
> for the series.

Thanks Andy & Hans!

I'll merge this once the test results are in. The BAT results have been
a bit flaky recently, so needed to do a rerun.

That said, I'm not sure if we have any hardware in CI that would
actually exercise the modifications, so in that sense I trust Hans'
testing much more.

BR,
Jani.


-- 
Jani Nikula, Intel

Re: [rft, PATCH v4 00/16] drm/i915/dsi: 4th attempt to get rid of IOSF GPIO

[Andy Shevchenko]

On Thu, Nov 16, 2023 at 12:15:03PM +0200, Jani Nikula wrote:
> On Thu, 16 Nov 2023, Hans de Goede <hdegoede@redhat.com> wrote:
> > Ok, this now has been testen on both a BYT and a CHT device which
> > actually use GPIO controls in their MIPI sequences so this
> > series is:
> >
> > Tested-by: Hans de Goede <hdegoede@redhat.com>
> >
> > And the code of the entire series also looks good to me:
> >
> > Reviewed-by: Hans de Goede <hdegoede@redhat.com>
> >
> > for the series.
> 
> Thanks Andy & Hans!
> 
> I'll merge this once the test results are in. The BAT results have been
> a bit flaky recently, so needed to do a rerun.
> 
> That said, I'm not sure if we have any hardware in CI that would
> actually exercise the modifications, so in that sense I trust Hans'
> testing much more.

Thank you!
Should I fix checkpatch warnings CI reported about?

-- 
With Best Regards,
Andy Shevchenko

Re: [rft, PATCH v4 00/16] drm/i915/dsi: 4th attempt to get rid of IOSF GPIO

[Andy Shevchenko]

On Thu, Nov 16, 2023 at 09:58:06AM +0100, Hans de Goede wrote:
> On 11/3/23 21:18, Andy Shevchenko wrote:
> > DSI code for VBT has a set of ugly GPIO hacks, one of which is direct
> > talking to GPIO IP behind the actual driver's back. A second attempt
> > to fix that is here.
> > 
> > If I understood correctly, my approach should work in the similar way as
> > the current IOSF GPIO.
> > 
> > Hans, I believe you have some devices that use this piece of code,
> > is it possible to give a test run on (one of) them?
> 
> Ok, this now has been testen on both a BYT and a CHT device which
> actually use GPIO controls in their MIPI sequences so this
> series is:
> 
> Tested-by: Hans de Goede <hdegoede@redhat.com>
> 
> And the code of the entire series also looks good to me:
> 
> Reviewed-by: Hans de Goede <hdegoede@redhat.com>
> 
> for the series.

Good news so far, thank you!

-- 
With Best Regards,
Andy Shevchenko

Re: [rft, PATCH v4 00/16] drm/i915/dsi: 4th attempt to get rid of IOSF GPIO

[Jani Nikula]

On Fri, 17 Nov 2023, Andy Shevchenko <andriy.shevchenko@linux.intel.com> wrote:
> On Thu, Nov 16, 2023 at 12:15:03PM +0200, Jani Nikula wrote:
>> On Thu, 16 Nov 2023, Hans de Goede <hdegoede@redhat.com> wrote:
>> > Ok, this now has been testen on both a BYT and a CHT device which
>> > actually use GPIO controls in their MIPI sequences so this
>> > series is:
>> >
>> > Tested-by: Hans de Goede <hdegoede@redhat.com>
>> >
>> > And the code of the entire series also looks good to me:
>> >
>> > Reviewed-by: Hans de Goede <hdegoede@redhat.com>
>> >
>> > for the series.
>> 
>> Thanks Andy & Hans!
>> 
>> I'll merge this once the test results are in. The BAT results have been
>> a bit flaky recently, so needed to do a rerun.
>> 
>> That said, I'm not sure if we have any hardware in CI that would
>> actually exercise the modifications, so in that sense I trust Hans'
>> testing much more.
>
> Thank you!
> Should I fix checkpatch warnings CI reported about?

Nah, they're benign.

BR,
Jani.

-- 
Jani Nikula, Intel