lkml.org 
[lkml]   [2019]   [Dec]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/5] drm/i915/dsi: Move poking of panel-enable GPIO to intel_dsi_vbt.c
Date
On some older devices (BYT, CHT) which may use v2 VBT MIPI-sequences,
we need to manually control the panel enable GPIO as v2 sequences do
not do this.

So far we have been carrying the code to do this on BYT/CHT devices
with a Crystal Cove PMIC in vlv_dsi.c, but as this really is a shortcoming
of the VBT MIPI-sequences, intel_dsi_vbt.c is a better place for this,
so move it there.

This is a preparation patch for adding panel-enable and backlight-enable
GPIO support for BYT devices where instead of the PMIC the SoC is used
for backlight control.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/gpu/drm/i915/display/intel_dsi.h | 2 +
drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 46 +++++++++++++++++++-
drivers/gpu/drm/i915/display/vlv_dsi.c | 27 +-----------
3 files changed, 48 insertions(+), 27 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi.h b/drivers/gpu/drm/i915/display/intel_dsi.h
index b15be5814599..de7e51cd3460 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi.h
+++ b/drivers/gpu/drm/i915/display/intel_dsi.h
@@ -203,6 +203,8 @@ void bxt_dsi_reset_clocks(struct intel_encoder *encoder, enum port port);

/* intel_dsi_vbt.c */
bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id);
+void intel_dsi_vbt_gpio_init(struct intel_dsi *intel_dsi);
+void intel_dsi_vbt_gpio_cleanup(struct intel_dsi *intel_dsi);
void intel_dsi_vbt_exec_sequence(struct intel_dsi *intel_dsi,
enum mipi_seq seq_id);
void intel_dsi_msleep(struct intel_dsi *intel_dsi, int msec);
diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index f90946c912ee..5352e8c9eca5 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -453,8 +453,8 @@ static const char *sequence_name(enum mipi_seq seq_id)
return "(unknown)";
}

-void intel_dsi_vbt_exec_sequence(struct intel_dsi *intel_dsi,
- enum mipi_seq seq_id)
+static void intel_dsi_vbt_exec(struct intel_dsi *intel_dsi,
+ enum mipi_seq seq_id)
{
struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev);
const u8 *data;
@@ -519,6 +519,18 @@ void intel_dsi_vbt_exec_sequence(struct intel_dsi *intel_dsi,
}
}

+void intel_dsi_vbt_exec_sequence(struct intel_dsi *intel_dsi,
+ enum mipi_seq seq_id)
+{
+ if (seq_id == MIPI_SEQ_POWER_ON && intel_dsi->gpio_panel)
+ gpiod_set_value_cansleep(intel_dsi->gpio_panel, 1);
+
+ intel_dsi_vbt_exec(intel_dsi, seq_id);
+
+ if (seq_id == MIPI_SEQ_POWER_OFF && intel_dsi->gpio_panel)
+ gpiod_set_value_cansleep(intel_dsi->gpio_panel, 0);
+}
+
void intel_dsi_msleep(struct intel_dsi *intel_dsi, int msec)
{
struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev);
@@ -671,3 +683,33 @@ bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id)

return true;
}
+
+/*
+ * On some BYT/CHT devs some sequences are incomplete and we need to manually
+ * control some GPIOs.
+ */
+void intel_dsi_vbt_gpio_init(struct intel_dsi *intel_dsi)
+{
+ struct drm_device *dev = intel_dsi->base.base.dev;
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ struct mipi_config *mipi_config = dev_priv->vbt.dsi.config;
+
+ if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
+ (mipi_config->pwm_blc == PPS_BLC_PMIC)) {
+ intel_dsi->gpio_panel =
+ gpiod_get(dev->dev, "panel", GPIOD_OUT_HIGH);
+
+ if (IS_ERR(intel_dsi->gpio_panel)) {
+ DRM_ERROR("Failed to own gpio for panel control\n");
+ intel_dsi->gpio_panel = NULL;
+ }
+ }
+}
+
+void intel_dsi_vbt_gpio_cleanup(struct intel_dsi *intel_dsi)
+{
+ if (intel_dsi->gpio_panel) {
+ gpiod_put(intel_dsi->gpio_panel);
+ intel_dsi->gpio_panel = NULL;
+ }
+}
diff --git a/drivers/gpu/drm/i915/display/vlv_dsi.c b/drivers/gpu/drm/i915/display/vlv_dsi.c
index 6865fd4b5883..178d0fffba5b 100644
--- a/drivers/gpu/drm/i915/display/vlv_dsi.c
+++ b/drivers/gpu/drm/i915/display/vlv_dsi.c
@@ -23,7 +23,6 @@
* Author: Jani Nikula <jani.nikula@intel.com>
*/

-#include <linux/gpio/consumer.h>
#include <linux/slab.h>

#include <drm/drm_atomic_helper.h>
@@ -797,9 +796,6 @@ static void intel_dsi_pre_enable(struct intel_encoder *encoder,
if (!IS_GEMINILAKE(dev_priv))
intel_dsi_prepare(encoder, pipe_config);

- /* Power on, try both CRC pmic gpio and VBT */
- if (intel_dsi->gpio_panel)
- gpiod_set_value_cansleep(intel_dsi->gpio_panel, 1);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_ON);
intel_dsi_msleep(intel_dsi, intel_dsi->panel_on_delay);

@@ -943,11 +939,8 @@ static void intel_dsi_post_disable(struct intel_encoder *encoder,
/* Assert reset */
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_ASSERT_RESET);

- /* Power off, try both CRC pmic gpio and VBT */
intel_dsi_msleep(intel_dsi, intel_dsi->panel_off_delay);
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_POWER_OFF);
- if (intel_dsi->gpio_panel)
- gpiod_set_value_cansleep(intel_dsi->gpio_panel, 0);

/*
* FIXME As we do with eDP, just make a note of the time here
@@ -1539,10 +1532,7 @@ static void intel_dsi_encoder_destroy(struct drm_encoder *encoder)
{
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);

- /* dispose of the gpios */
- if (intel_dsi->gpio_panel)
- gpiod_put(intel_dsi->gpio_panel);
-
+ intel_dsi_vbt_gpio_cleanup(intel_dsi);
intel_encoder_destroy(encoder);
}

@@ -1920,20 +1910,7 @@ void vlv_dsi_init(struct drm_i915_private *dev_priv)

vlv_dphy_param_init(intel_dsi);

- /*
- * In case of BYT with CRC PMIC, we need to use GPIO for
- * Panel control.
- */
- if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
- (dev_priv->vbt.dsi.config->pwm_blc == PPS_BLC_PMIC)) {
- intel_dsi->gpio_panel =
- gpiod_get(dev->dev, "panel", GPIOD_OUT_HIGH);
-
- if (IS_ERR(intel_dsi->gpio_panel)) {
- DRM_ERROR("Failed to own gpio for panel control\n");
- intel_dsi->gpio_panel = NULL;
- }
- }
+ intel_dsi_vbt_gpio_init(intel_dsi);

drm_connector_init(dev, connector, &intel_dsi_connector_funcs,
DRM_MODE_CONNECTOR_DSI);
--
2.23.0
\
 
 \ /
  Last update: 2019-12-15 17:38    [W:0.122 / U:4.920 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site