drm/i915: Use the CRC gpio for panel enable/disable
The CRC (Crystal Cove) PMIC, controls the panel enable and disable
signals for BYT for dsi panels. This is indicated in the VBT fields. Use
that to initialize and use GPIO based control for these signals.
v2: Use the newer gpiod interface(Alexandre)
v3: Remove the redundant checks and unused code (Ville)
v4: Moved PWM vs SoC backlight #defines to intel_bios.h (Jani)
CC: Samuel Ortiz <sameo@linux.intel.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Tested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index b5a5558..c4db74a 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -31,6 +31,7 @@
#include <drm/drm_panel.h>
#include <drm/drm_mipi_dsi.h>
#include <linux/slab.h>
+#include <linux/gpio/consumer.h>
#include "i915_drv.h"
#include "intel_drv.h"
#include "intel_dsi.h"
@@ -415,6 +416,12 @@
DRM_DEBUG_KMS("\n");
+ /* Panel Enable over CRC PMIC */
+ if (intel_dsi->gpio_panel)
+ gpiod_set_value_cansleep(intel_dsi->gpio_panel, 1);
+
+ msleep(intel_dsi->panel_on_delay);
+
/* Disable DPOunit clock gating, can stall pipe
* and we need DPLL REFA always enabled */
tmp = I915_READ(DPLL(pipe));
@@ -432,8 +439,6 @@
/* put device in ready state */
intel_dsi_device_ready(encoder);
- msleep(intel_dsi->panel_on_delay);
-
drm_panel_prepare(intel_dsi->panel);
for_each_dsi_port(port, intel_dsi->ports)
@@ -576,6 +581,10 @@
msleep(intel_dsi->panel_off_delay);
msleep(intel_dsi->panel_pwr_cycle_delay);
+
+ /* Panel Disable over CRC PMIC */
+ if (intel_dsi->gpio_panel)
+ gpiod_set_value_cansleep(intel_dsi->gpio_panel, 0);
}
static bool intel_dsi_get_hw_state(struct intel_encoder *encoder,
@@ -955,6 +964,11 @@
/* XXX: Logically this call belongs in the panel driver. */
drm_panel_remove(intel_dsi->panel);
}
+
+ /* dispose of the gpios */
+ if (intel_dsi->gpio_panel)
+ gpiod_put(intel_dsi->gpio_panel);
+
intel_encoder_destroy(encoder);
}
@@ -1071,6 +1085,20 @@
goto err;
}
+ /*
+ * In case of BYT with CRC PMIC, we need to use GPIO for
+ * Panel control.
+ */
+ if (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_encoder->type = INTEL_OUTPUT_DSI;
intel_encoder->cloneable = 0;
drm_connector_init(dev, connector, &intel_dsi_connector_funcs,