From: Jani Nikula <jani.nikula@xxxxxxxxx>
Request the GPIO by index through the consumer API. For now, use a quick
hack to store the already requested ones, simply because I have no idea
whether this actually works or not, and I have no way to test it.
v2: switch *NULL* to *"panel"* when requesting gpio for MIPI/DSI panel. (Mika)
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Mika Kahola <mika.kahola@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_dsi_panel_vbt.c | 38 +++++++++++++++++++++++++-----
1 file changed, 32 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
index 0d8ff00..dda678b 100644
--- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
+++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
@@ -29,6 +29,7 @@
#include <drm/drm_edid.h>
#include <drm/i915_drm.h>
#include <drm/drm_panel.h>
+#include <linux/gpio/consumer.h>
#include <linux/slab.h>
#include <video/mipi_display.h>
#include <asm/intel-mid.h>
@@ -304,19 +305,44 @@ static void chv_exec_gpio(struct drm_i915_private *dev_priv,
mutex_unlock(&dev_priv->sb_lock);
}
+static void bxt_exec_gpio(struct drm_i915_private *dev_priv,
+ u8 gpio_source, u8 gpio_index, bool value)
+{
+ /* 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,
+ "panel", gpio_index,
+ value ? GPIOD_OUT_LOW :
+ GPIOD_OUT_HIGH);
+
+ if (IS_ERR_OR_NULL(gpio_desc)) {
+ DRM_ERROR("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);
+}
+
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);
- u8 gpio_source, gpio_index;
+ u8 gpio_source, gpio_index = 0, gpio_number;
bool value;
DRM_DEBUG_KMS("\n");
if (dev_priv->vbt.dsi.seq_version >= 3)
- data++;
+ gpio_index = *data++;
- gpio_index = *data++;
+ gpio_number = *data++;
/* gpio source in sequence v2 only */
if (dev_priv->vbt.dsi.seq_version == 2)
@@ -328,11 +354,11 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
value = *data++ & 1;
if (IS_VALLEYVIEW(dev_priv))
- vlv_exec_gpio(dev_priv, gpio_source, gpio_index, value);
+ vlv_exec_gpio(dev_priv, gpio_source, gpio_number, value);
else if (IS_CHERRYVIEW(dev_priv))
- chv_exec_gpio(dev_priv, gpio_source, gpio_index, value);
+ chv_exec_gpio(dev_priv, gpio_source, gpio_number, value);
else
- DRM_DEBUG_KMS("GPIO element not supported on this platform\n");
+ bxt_exec_gpio(dev_priv, gpio_source, gpio_index, value);
return data;
}
--
2.7.4
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