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From: Deepak M <m.deepak@intel.com>
To: intel-gfx@lists.freedesktop.org
Subject: [MIPI SEQ PARSING v2 PATCH 11/11] drm/i915: BXT GPIO support for backlight and panel control
Date: Thu, 10 Sep 2015 04:54:30 +0530	[thread overview]
Message-ID: <1441841070-11532-12-git-send-email-m.deepak@intel.com> (raw)
In-Reply-To: <1441841070-11532-1-git-send-email-m.deepak@intel.com>

From: Uma Shankar <uma.shankar@intel.com>

Added the BXT GPIO pin configuration and programming logic for
backlight and panel control.

v2: rebase

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/intel_dsi_panel_vbt.c |   46 ++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
index 2263559..4c5e33a 100644
--- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
+++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
@@ -32,6 +32,7 @@
 #include <linux/slab.h>
 #include <video/mipi_display.h>
 #include <linux/i2c.h>
+#include <linux/gpio.h>
 #include <asm/intel-mid.h>
 #include <video/mipi_display.h>
 #include "i915_drv.h"
@@ -327,6 +328,16 @@ out:
 	return data;
 }
 
+struct bxt_gpio_table {
+	u16 gpio_pin;
+	u16 offset;
+};
+
+static struct bxt_gpio_table bxt_gtable[] = {
+	{0xC1, 270},
+	{0x1B, 456}
+};
+
 static inline enum port intel_dsi_seq_port_to_port(u8 port)
 {
 	return port ? PORT_C : PORT_A;
@@ -539,6 +550,39 @@ static int vlv_program_gpio(struct intel_dsi *intel_dsi,
 	return 0;
 }
 
+static int bxt_program_gpio(struct intel_dsi *intel_dsi,
+				const u8 *data, const u8 **cur_data)
+{
+	struct drm_device *dev = intel_dsi->base.base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	u8 gpio, action;
+	u16 function;
+
+	/*
+	 * Skipping the first byte as it is of no
+	 * interest for android in new version
+	 */
+	if (dev_priv->vbt.dsi.seq_version >= 3)
+		data++;
+
+	gpio = *data++;
+
+	/* pull up/down */
+	action = *data++;
+	function = (bxt_gtable[0].gpio_pin == gpio) ?
+		bxt_gtable[0].offset :
+		(bxt_gtable[1].gpio_pin == gpio) ?
+		bxt_gtable[1].offset : 0;
+	if (!function)
+		return -1;
+
+	gpio_request_one(function, GPIOF_DIR_OUT, "MIPI");
+	gpio_set_value(function, action);
+
+	*cur_data = data;
+	return 0;
+}
+
 static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
 {
 	struct drm_device *dev = intel_dsi->base.base.dev;
@@ -552,6 +596,8 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
 		ret = chv_program_gpio(intel_dsi, data, &data);
 	else if (IS_VALLEYVIEW(dev))
 		ret = vlv_program_gpio(intel_dsi, data, &data);
+	else if (IS_BROXTON(dev))
+		ret = bxt_program_gpio(intel_dsi, data, &data);
 	else
 		DRM_ERROR("GPIO programming missing for this platform.\n");
 
-- 
1.7.9.5

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      parent reply	other threads:[~2015-09-09 23:20 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-09 23:24 [MIPI SEQ PARSING v2 PATCH 00/11] Patches to support the version 3 of MIPI sequence in VBT Deepak M
2015-09-09 23:24 ` [MIPI SEQ PARSING v2 PATCH 01/11] drm/i915: Adding the parsing logic for the i2c element Deepak M
2015-09-17  9:18   ` Jani Nikula
2015-09-22  6:46     ` Deepak, M
2015-09-09 23:24 ` [MIPI SEQ PARSING v2 PATCH 02/11] drm/i915: Updating asle structure with new fields Deepak M
2015-09-09 23:24 ` [MIPI SEQ PARSING v2 PATCH 03/11] drm/i915: Parsing VBT if size of VBT exceeds 6KB Deepak M
2015-09-16 13:24   ` Jani Nikula
2015-09-17 12:10   ` Jani Nikula
2015-09-22  6:37     ` Deepak, M
2015-09-22  7:24       ` Jani Nikula
2015-09-09 23:24 ` [MIPI SEQ PARSING v2 PATCH 04/11] drm/i915: Using the approprite vbt size if vbt is not in mailbox4 of opregion Deepak M
2015-09-17 12:18   ` Jani Nikula
2015-09-17 13:31     ` Jani Nikula
2015-09-22  6:11       ` Deepak, M
2015-09-22  6:24     ` Deepak, M
2015-09-09 23:24 ` [MIPI SEQ PARSING v2 PATCH 05/11] drm/i915: Added support the v3 mipi sequence block Deepak M
2015-09-17 14:38   ` Jani Nikula
2015-09-22  6:23     ` Deepak, M
2015-09-09 23:24 ` [MIPI SEQ PARSING v2 PATCH 06/11] drm/i915: extending gpio read/write to other cores Deepak M
2015-09-09 23:24 ` [MIPI SEQ PARSING v2 PATCH 07/11] drm/i915: Added the generic gpio sequence support and gpio table Deepak M
2015-09-17 14:44   ` Jani Nikula
2015-09-09 23:24 ` [MIPI SEQ PARSING v2 PATCH 08/11] drm/i915: GPIO for CHT generic MIPI Deepak M
2015-09-09 23:24 ` [MIPI SEQ PARSING v2 PATCH 09/11] drm: Add few more wrapper functions for drm panel Deepak M
2015-09-09 23:24 ` [MIPI SEQ PARSING v2 PATCH 10/11] drm/i915: Add functions to execute the new sequences from VBT Deepak M
2015-09-09 23:24 ` Deepak M [this message]

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