summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/i915/dvo_ns2501.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/i915/dvo_ns2501.c')
-rw-r--r--drivers/gpu/drm/i915/dvo_ns2501.c588
1 files changed, 0 insertions, 588 deletions
diff --git a/drivers/gpu/drm/i915/dvo_ns2501.c b/drivers/gpu/drm/i915/dvo_ns2501.c
deleted file mode 100644
index c4a255be6979..000000000000
--- a/drivers/gpu/drm/i915/dvo_ns2501.c
+++ /dev/null
@@ -1,588 +0,0 @@
-/*
- *
- * Copyright (c) 2012 Gilles Dartiguelongue, Thomas Richter
- *
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sub license, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice (including the
- * next paragraph) shall be included in all copies or substantial portions
- * of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- */
-
-#include "dvo.h"
-#include "i915_reg.h"
-#include "i915_drv.h"
-
-#define NS2501_VID 0x1305
-#define NS2501_DID 0x6726
-
-#define NS2501_VID_LO 0x00
-#define NS2501_VID_HI 0x01
-#define NS2501_DID_LO 0x02
-#define NS2501_DID_HI 0x03
-#define NS2501_REV 0x04
-#define NS2501_RSVD 0x05
-#define NS2501_FREQ_LO 0x06
-#define NS2501_FREQ_HI 0x07
-
-#define NS2501_REG8 0x08
-#define NS2501_8_VEN (1<<5)
-#define NS2501_8_HEN (1<<4)
-#define NS2501_8_DSEL (1<<3)
-#define NS2501_8_BPAS (1<<2)
-#define NS2501_8_RSVD (1<<1)
-#define NS2501_8_PD (1<<0)
-
-#define NS2501_REG9 0x09
-#define NS2501_9_VLOW (1<<7)
-#define NS2501_9_MSEL_MASK (0x7<<4)
-#define NS2501_9_TSEL (1<<3)
-#define NS2501_9_RSEN (1<<2)
-#define NS2501_9_RSVD (1<<1)
-#define NS2501_9_MDI (1<<0)
-
-#define NS2501_REGC 0x0c
-
-struct ns2501_priv {
- //I2CDevRec d;
- bool quiet;
- int reg_8_shadow;
- int reg_8_set;
- // Shadow registers for i915
- int dvoc;
- int pll_a;
- int srcdim;
- int fw_blc;
-};
-
-#define NSPTR(d) ((NS2501Ptr)(d->DriverPrivate.ptr))
-
-/*
- * For reasons unclear to me, the ns2501 at least on the Fujitsu/Siemens
- * laptops does not react on the i2c bus unless
- * both the PLL is running and the display is configured in its native
- * resolution.
- * This function forces the DVO on, and stores the registers it touches.
- * Afterwards, registers are restored to regular values.
- *
- * This is pretty much a hack, though it works.
- * Without that, ns2501_readb and ns2501_writeb fail
- * when switching the resolution.
- */
-
-static void enable_dvo(struct intel_dvo_device *dvo)
-{
- struct ns2501_priv *ns = (struct ns2501_priv *)(dvo->dev_priv);
- struct i2c_adapter *adapter = dvo->i2c_bus;
- struct intel_gmbus *bus = container_of(adapter,
- struct intel_gmbus,
- adapter);
- struct drm_i915_private *dev_priv = bus->dev_priv;
-
- DRM_DEBUG_KMS("%s: Trying to re-enable the DVO\n", __FUNCTION__);
-
- ns->dvoc = I915_READ(DVO_C);
- ns->pll_a = I915_READ(_DPLL_A);
- ns->srcdim = I915_READ(DVOC_SRCDIM);
- ns->fw_blc = I915_READ(FW_BLC);
-
- I915_WRITE(DVOC, 0x10004084);
- I915_WRITE(_DPLL_A, 0xd0820000);
- I915_WRITE(DVOC_SRCDIM, 0x400300); // 1024x768
- I915_WRITE(FW_BLC, 0x1080304);
-
- I915_WRITE(DVOC, 0x90004084);
-}
-
-/*
- * Restore the I915 registers modified by the above
- * trigger function.
- */
-static void restore_dvo(struct intel_dvo_device *dvo)
-{
- struct i2c_adapter *adapter = dvo->i2c_bus;
- struct intel_gmbus *bus = container_of(adapter,
- struct intel_gmbus,
- adapter);
- struct drm_i915_private *dev_priv = bus->dev_priv;
- struct ns2501_priv *ns = (struct ns2501_priv *)(dvo->dev_priv);
-
- I915_WRITE(DVOC, ns->dvoc);
- I915_WRITE(_DPLL_A, ns->pll_a);
- I915_WRITE(DVOC_SRCDIM, ns->srcdim);
- I915_WRITE(FW_BLC, ns->fw_blc);
-}
-
-/*
-** Read a register from the ns2501.
-** Returns true if successful, false otherwise.
-** If it returns false, it might be wise to enable the
-** DVO with the above function.
-*/
-static bool ns2501_readb(struct intel_dvo_device *dvo, int addr, uint8_t * ch)
-{
- struct ns2501_priv *ns = dvo->dev_priv;
- struct i2c_adapter *adapter = dvo->i2c_bus;
- u8 out_buf[2];
- u8 in_buf[2];
-
- struct i2c_msg msgs[] = {
- {
- .addr = dvo->slave_addr,
- .flags = 0,
- .len = 1,
- .buf = out_buf,
- },
- {
- .addr = dvo->slave_addr,
- .flags = I2C_M_RD,
- .len = 1,
- .buf = in_buf,
- }
- };
-
- out_buf[0] = addr;
- out_buf[1] = 0;
-
- if (i2c_transfer(adapter, msgs, 2) == 2) {
- *ch = in_buf[0];
- return true;
- };
-
- if (!ns->quiet) {
- DRM_DEBUG_KMS
- ("Unable to read register 0x%02x from %s:0x%02x.\n", addr,
- adapter->name, dvo->slave_addr);
- }
-
- return false;
-}
-
-/*
-** Write a register to the ns2501.
-** Returns true if successful, false otherwise.
-** If it returns false, it might be wise to enable the
-** DVO with the above function.
-*/
-static bool ns2501_writeb(struct intel_dvo_device *dvo, int addr, uint8_t ch)
-{
- struct ns2501_priv *ns = dvo->dev_priv;
- struct i2c_adapter *adapter = dvo->i2c_bus;
- uint8_t out_buf[2];
-
- struct i2c_msg msg = {
- .addr = dvo->slave_addr,
- .flags = 0,
- .len = 2,
- .buf = out_buf,
- };
-
- out_buf[0] = addr;
- out_buf[1] = ch;
-
- if (i2c_transfer(adapter, &msg, 1) == 1) {
- return true;
- }
-
- if (!ns->quiet) {
- DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d\n",
- addr, adapter->name, dvo->slave_addr);
- }
-
- return false;
-}
-
-/* National Semiconductor 2501 driver for chip on i2c bus
- * scan for the chip on the bus.
- * Hope the VBIOS initialized the PLL correctly so we can
- * talk to it. If not, it will not be seen and not detected.
- * Bummer!
- */
-static bool ns2501_init(struct intel_dvo_device *dvo,
- struct i2c_adapter *adapter)
-{
- /* this will detect the NS2501 chip on the specified i2c bus */
- struct ns2501_priv *ns;
- unsigned char ch;
-
- ns = kzalloc(sizeof(struct ns2501_priv), GFP_KERNEL);
- if (ns == NULL)
- return false;
-
- dvo->i2c_bus = adapter;
- dvo->dev_priv = ns;
- ns->quiet = true;
-
- if (!ns2501_readb(dvo, NS2501_VID_LO, &ch))
- goto out;
-
- if (ch != (NS2501_VID & 0xff)) {
- DRM_DEBUG_KMS("ns2501 not detected got %d: from %s Slave %d.\n",
- ch, adapter->name, dvo->slave_addr);
- goto out;
- }
-
- if (!ns2501_readb(dvo, NS2501_DID_LO, &ch))
- goto out;
-
- if (ch != (NS2501_DID & 0xff)) {
- DRM_DEBUG_KMS("ns2501 not detected got %d: from %s Slave %d.\n",
- ch, adapter->name, dvo->slave_addr);
- goto out;
- }
- ns->quiet = false;
- ns->reg_8_set = 0;
- ns->reg_8_shadow =
- NS2501_8_PD | NS2501_8_BPAS | NS2501_8_VEN | NS2501_8_HEN;
-
- DRM_DEBUG_KMS("init ns2501 dvo controller successfully!\n");
- return true;
-
-out:
- kfree(ns);
- return false;
-}
-
-static enum drm_connector_status ns2501_detect(struct intel_dvo_device *dvo)
-{
- /*
- * This is a Laptop display, it doesn't have hotplugging.
- * Even if not, the detection bit of the 2501 is unreliable as
- * it only works for some display types.
- * It is even more unreliable as the PLL must be active for
- * allowing reading from the chiop.
- */
- return connector_status_connected;
-}
-
-static enum drm_mode_status ns2501_mode_valid(struct intel_dvo_device *dvo,
- struct drm_display_mode *mode)
-{
- DRM_DEBUG_KMS
- ("%s: is mode valid (hdisplay=%d,htotal=%d,vdisplay=%d,vtotal=%d)\n",
- __FUNCTION__, mode->hdisplay, mode->htotal, mode->vdisplay,
- mode->vtotal);
-
- /*
- * Currently, these are all the modes I have data from.
- * More might exist. Unclear how to find the native resolution
- * of the panel in here so we could always accept it
- * by disabling the scaler.
- */
- if ((mode->hdisplay == 800 && mode->vdisplay == 600) ||
- (mode->hdisplay == 640 && mode->vdisplay == 480) ||
- (mode->hdisplay == 1024 && mode->vdisplay == 768)) {
- return MODE_OK;
- } else {
- return MODE_ONE_SIZE; /* Is this a reasonable error? */
- }
-}
-
-static void ns2501_mode_set(struct intel_dvo_device *dvo,
- struct drm_display_mode *mode,
- struct drm_display_mode *adjusted_mode)
-{
- bool ok;
- bool restore = false;
- struct ns2501_priv *ns = (struct ns2501_priv *)(dvo->dev_priv);
-
- DRM_DEBUG_KMS
- ("%s: set mode (hdisplay=%d,htotal=%d,vdisplay=%d,vtotal=%d).\n",
- __FUNCTION__, mode->hdisplay, mode->htotal, mode->vdisplay,
- mode->vtotal);
-
- /*
- * Where do I find the native resolution for which scaling is not required???
- *
- * First trigger the DVO on as otherwise the chip does not appear on the i2c
- * bus.
- */
- do {
- ok = true;
-
- if (mode->hdisplay == 800 && mode->vdisplay == 600) {
- /* mode 277 */
- ns->reg_8_shadow &= ~NS2501_8_BPAS;
- DRM_DEBUG_KMS("%s: switching to 800x600\n",
- __FUNCTION__);
-
- /*
- * No, I do not know where this data comes from.
- * It is just what the video bios left in the DVO, so
- * I'm just copying it here over.
- * This also means that I cannot support any other modes
- * except the ones supported by the bios.
- */
- ok &= ns2501_writeb(dvo, 0x11, 0xc8); // 0xc7 also works.
- ok &= ns2501_writeb(dvo, 0x1b, 0x19);
- ok &= ns2501_writeb(dvo, 0x1c, 0x62); // VBIOS left 0x64 here, but 0x62 works nicer
- ok &= ns2501_writeb(dvo, 0x1d, 0x02);
-
- ok &= ns2501_writeb(dvo, 0x34, 0x03);
- ok &= ns2501_writeb(dvo, 0x35, 0xff);
-
- ok &= ns2501_writeb(dvo, 0x80, 0x27);
- ok &= ns2501_writeb(dvo, 0x81, 0x03);
- ok &= ns2501_writeb(dvo, 0x82, 0x41);
- ok &= ns2501_writeb(dvo, 0x83, 0x05);
-
- ok &= ns2501_writeb(dvo, 0x8d, 0x02);
- ok &= ns2501_writeb(dvo, 0x8e, 0x04);
- ok &= ns2501_writeb(dvo, 0x8f, 0x00);
-
- ok &= ns2501_writeb(dvo, 0x90, 0xfe); /* vertical. VBIOS left 0xff here, but 0xfe works better */
- ok &= ns2501_writeb(dvo, 0x91, 0x07);
- ok &= ns2501_writeb(dvo, 0x94, 0x00);
- ok &= ns2501_writeb(dvo, 0x95, 0x00);
-
- ok &= ns2501_writeb(dvo, 0x96, 0x00);
-
- ok &= ns2501_writeb(dvo, 0x99, 0x00);
- ok &= ns2501_writeb(dvo, 0x9a, 0x88);
-
- ok &= ns2501_writeb(dvo, 0x9c, 0x23); /* Looks like first and last line of the image. */
- ok &= ns2501_writeb(dvo, 0x9d, 0x00);
- ok &= ns2501_writeb(dvo, 0x9e, 0x25);
- ok &= ns2501_writeb(dvo, 0x9f, 0x03);
-
- ok &= ns2501_writeb(dvo, 0xa4, 0x80);
-
- ok &= ns2501_writeb(dvo, 0xb6, 0x00);
-
- ok &= ns2501_writeb(dvo, 0xb9, 0xc8); /* horizontal? */
- ok &= ns2501_writeb(dvo, 0xba, 0x00); /* horizontal? */
-
- ok &= ns2501_writeb(dvo, 0xc0, 0x05); /* horizontal? */
- ok &= ns2501_writeb(dvo, 0xc1, 0xd7);
-
- ok &= ns2501_writeb(dvo, 0xc2, 0x00);
- ok &= ns2501_writeb(dvo, 0xc3, 0xf8);
-
- ok &= ns2501_writeb(dvo, 0xc4, 0x03);
- ok &= ns2501_writeb(dvo, 0xc5, 0x1a);
-
- ok &= ns2501_writeb(dvo, 0xc6, 0x00);
- ok &= ns2501_writeb(dvo, 0xc7, 0x73);
- ok &= ns2501_writeb(dvo, 0xc8, 0x02);
-
- } else if (mode->hdisplay == 640 && mode->vdisplay == 480) {
- /* mode 274 */
- DRM_DEBUG_KMS("%s: switching to 640x480\n",
- __FUNCTION__);
- /*
- * No, I do not know where this data comes from.
- * It is just what the video bios left in the DVO, so
- * I'm just copying it here over.
- * This also means that I cannot support any other modes
- * except the ones supported by the bios.
- */
- ns->reg_8_shadow &= ~NS2501_8_BPAS;
-
- ok &= ns2501_writeb(dvo, 0x11, 0xa0);
- ok &= ns2501_writeb(dvo, 0x1b, 0x11);
- ok &= ns2501_writeb(dvo, 0x1c, 0x54);
- ok &= ns2501_writeb(dvo, 0x1d, 0x03);
-
- ok &= ns2501_writeb(dvo, 0x34, 0x03);
- ok &= ns2501_writeb(dvo, 0x35, 0xff);
-
- ok &= ns2501_writeb(dvo, 0x80, 0xff);
- ok &= ns2501_writeb(dvo, 0x81, 0x07);
- ok &= ns2501_writeb(dvo, 0x82, 0x3d);
- ok &= ns2501_writeb(dvo, 0x83, 0x05);
-
- ok &= ns2501_writeb(dvo, 0x8d, 0x02);
- ok &= ns2501_writeb(dvo, 0x8e, 0x10);
- ok &= ns2501_writeb(dvo, 0x8f, 0x00);
-
- ok &= ns2501_writeb(dvo, 0x90, 0xff); /* vertical */
- ok &= ns2501_writeb(dvo, 0x91, 0x07);
- ok &= ns2501_writeb(dvo, 0x94, 0x00);
- ok &= ns2501_writeb(dvo, 0x95, 0x00);
-
- ok &= ns2501_writeb(dvo, 0x96, 0x05);
-
- ok &= ns2501_writeb(dvo, 0x99, 0x00);
- ok &= ns2501_writeb(dvo, 0x9a, 0x88);
-
- ok &= ns2501_writeb(dvo, 0x9c, 0x24);
- ok &= ns2501_writeb(dvo, 0x9d, 0x00);
- ok &= ns2501_writeb(dvo, 0x9e, 0x25);
- ok &= ns2501_writeb(dvo, 0x9f, 0x03);
-
- ok &= ns2501_writeb(dvo, 0xa4, 0x84);
-
- ok &= ns2501_writeb(dvo, 0xb6, 0x09);
-
- ok &= ns2501_writeb(dvo, 0xb9, 0xa0); /* horizontal? */
- ok &= ns2501_writeb(dvo, 0xba, 0x00); /* horizontal? */
-
- ok &= ns2501_writeb(dvo, 0xc0, 0x05); /* horizontal? */
- ok &= ns2501_writeb(dvo, 0xc1, 0x90);
-
- ok &= ns2501_writeb(dvo, 0xc2, 0x00);
- ok &= ns2501_writeb(dvo, 0xc3, 0x0f);
-
- ok &= ns2501_writeb(dvo, 0xc4, 0x03);
- ok &= ns2501_writeb(dvo, 0xc5, 0x16);
-
- ok &= ns2501_writeb(dvo, 0xc6, 0x00);
- ok &= ns2501_writeb(dvo, 0xc7, 0x02);
- ok &= ns2501_writeb(dvo, 0xc8, 0x02);
-
- } else if (mode->hdisplay == 1024 && mode->vdisplay == 768) {
- /* mode 280 */
- DRM_DEBUG_KMS("%s: switching to 1024x768\n",
- __FUNCTION__);
- /*
- * This might or might not work, actually. I'm silently
- * assuming here that the native panel resolution is
- * 1024x768. If not, then this leaves the scaler disabled
- * generating a picture that is likely not the expected.
- *
- * Problem is that I do not know where to take the panel
- * dimensions from.
- *
- * Enable the bypass, scaling not required.
- *
- * The scaler registers are irrelevant here....
- *
- */
- ns->reg_8_shadow |= NS2501_8_BPAS;
- ok &= ns2501_writeb(dvo, 0x37, 0x44);
- } else {
- /*
- * Data not known. Bummer!
- * Hopefully, the code should not go here
- * as mode_OK delivered no other modes.
- */
- ns->reg_8_shadow |= NS2501_8_BPAS;
- }
- ok &= ns2501_writeb(dvo, NS2501_REG8, ns->reg_8_shadow);
-
- if (!ok) {
- if (restore)
- restore_dvo(dvo);
- enable_dvo(dvo);
- restore = true;
- }
- } while (!ok);
- /*
- * Restore the old i915 registers before
- * forcing the ns2501 on.
- */
- if (restore)
- restore_dvo(dvo);
-}
-
-/* set the NS2501 power state */
-static bool ns2501_get_hw_state(struct intel_dvo_device *dvo)
-{
- unsigned char ch;
-
- if (!ns2501_readb(dvo, NS2501_REG8, &ch))
- return false;
-
- if (ch & NS2501_8_PD)
- return true;
- else
- return false;
-}
-
-/* set the NS2501 power state */
-static void ns2501_dpms(struct intel_dvo_device *dvo, bool enable)
-{
- bool ok;
- bool restore = false;
- struct ns2501_priv *ns = (struct ns2501_priv *)(dvo->dev_priv);
- unsigned char ch;
-
- DRM_DEBUG_KMS("%s: Trying set the dpms of the DVO to %i\n",
- __FUNCTION__, enable);
-
- ch = ns->reg_8_shadow;
-
- if (enable)
- ch |= NS2501_8_PD;
- else
- ch &= ~NS2501_8_PD;
-
- if (ns->reg_8_set == 0 || ns->reg_8_shadow != ch) {
- ns->reg_8_set = 1;
- ns->reg_8_shadow = ch;
-
- do {
- ok = true;
- ok &= ns2501_writeb(dvo, NS2501_REG8, ch);
- ok &=
- ns2501_writeb(dvo, 0x34,
- enable ? 0x03 : 0x00);
- ok &=
- ns2501_writeb(dvo, 0x35,
- enable ? 0xff : 0x00);
- if (!ok) {
- if (restore)
- restore_dvo(dvo);
- enable_dvo(dvo);
- restore = true;
- }
- } while (!ok);
-
- if (restore)
- restore_dvo(dvo);
- }
-}
-
-static void ns2501_dump_regs(struct intel_dvo_device *dvo)
-{
- uint8_t val;
-
- ns2501_readb(dvo, NS2501_FREQ_LO, &val);
- DRM_LOG_KMS("NS2501_FREQ_LO: 0x%02x\n", val);
- ns2501_readb(dvo, NS2501_FREQ_HI, &val);
- DRM_LOG_KMS("NS2501_FREQ_HI: 0x%02x\n", val);
- ns2501_readb(dvo, NS2501_REG8, &val);
- DRM_LOG_KMS("NS2501_REG8: 0x%02x\n", val);
- ns2501_readb(dvo, NS2501_REG9, &val);
- DRM_LOG_KMS("NS2501_REG9: 0x%02x\n", val);
- ns2501_readb(dvo, NS2501_REGC, &val);
- DRM_LOG_KMS("NS2501_REGC: 0x%02x\n", val);
-}
-
-static void ns2501_destroy(struct intel_dvo_device *dvo)
-{
- struct ns2501_priv *ns = dvo->dev_priv;
-
- if (ns) {
- kfree(ns);
- dvo->dev_priv = NULL;
- }
-}
-
-struct intel_dvo_dev_ops ns2501_ops = {
- .init = ns2501_init,
- .detect = ns2501_detect,
- .mode_valid = ns2501_mode_valid,
- .mode_set = ns2501_mode_set,
- .dpms = ns2501_dpms,
- .get_hw_state = ns2501_get_hw_state,
- .dump_regs = ns2501_dump_regs,
- .destroy = ns2501_destroy,
-};
generated by cgit (git 2.34.1) at 2025-12-26 09:50:11 +0000