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path: root/drivers/gpu/drm/i915/intel_dsi_cmd.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_dsi_cmd.c')
-rw-r--r--drivers/gpu/drm/i915/intel_dsi_cmd.c437
1 files changed, 0 insertions, 437 deletions
diff --git a/drivers/gpu/drm/i915/intel_dsi_cmd.c b/drivers/gpu/drm/i915/intel_dsi_cmd.c
deleted file mode 100644
index f4767fd2ebeb..000000000000
--- a/drivers/gpu/drm/i915/intel_dsi_cmd.c
+++ /dev/null
@@ -1,437 +0,0 @@
-/*
- * Copyright © 2013 Intel Corporation
- *
- * 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, sublicense,
- * 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 NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS 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.
- *
- * Author: Jani Nikula <jani.nikula@intel.com>
- */
-
-#include <linux/export.h>
-#include <drm/drmP.h>
-#include <drm/drm_crtc.h>
-#include <video/mipi_display.h>
-#include "i915_drv.h"
-#include "intel_drv.h"
-#include "intel_dsi.h"
-#include "intel_dsi_cmd.h"
-
-/*
- * XXX: MIPI_DATA_ADDRESS, MIPI_DATA_LENGTH, MIPI_COMMAND_LENGTH, and
- * MIPI_COMMAND_ADDRESS registers.
- *
- * Apparently these registers provide a MIPI adapter level way to send (lots of)
- * commands and data to the receiver, without having to write the commands and
- * data to MIPI_{HS,LP}_GEN_{CTRL,DATA} registers word by word.
- *
- * Presumably for anything other than MIPI_DCS_WRITE_MEMORY_START and
- * MIPI_DCS_WRITE_MEMORY_CONTINUE (which are used to update the external
- * framebuffer in command mode displays) these are just an optimization that can
- * come later.
- *
- * For memory writes, these should probably be used for performance.
- */
-
-static void print_stat(struct intel_dsi *intel_dsi)
-{
- struct drm_encoder *encoder = &intel_dsi->base.base;
- struct drm_device *dev = encoder->dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
- enum pipe pipe = intel_crtc->pipe;
- u32 val;
-
- val = I915_READ(MIPI_INTR_STAT(pipe));
-
-#define STAT_BIT(val, bit) (val) & (bit) ? " " #bit : ""
- DRM_DEBUG_KMS("MIPI_INTR_STAT(%d) = %08x"
- "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
- "\n", pipe, val,
- STAT_BIT(val, TEARING_EFFECT),
- STAT_BIT(val, SPL_PKT_SENT_INTERRUPT),
- STAT_BIT(val, GEN_READ_DATA_AVAIL),
- STAT_BIT(val, LP_GENERIC_WR_FIFO_FULL),
- STAT_BIT(val, HS_GENERIC_WR_FIFO_FULL),
- STAT_BIT(val, RX_PROT_VIOLATION),
- STAT_BIT(val, RX_INVALID_TX_LENGTH),
- STAT_BIT(val, ACK_WITH_NO_ERROR),
- STAT_BIT(val, TURN_AROUND_ACK_TIMEOUT),
- STAT_BIT(val, LP_RX_TIMEOUT),
- STAT_BIT(val, HS_TX_TIMEOUT),
- STAT_BIT(val, DPI_FIFO_UNDERRUN),
- STAT_BIT(val, LOW_CONTENTION),
- STAT_BIT(val, HIGH_CONTENTION),
- STAT_BIT(val, TXDSI_VC_ID_INVALID),
- STAT_BIT(val, TXDSI_DATA_TYPE_NOT_RECOGNISED),
- STAT_BIT(val, TXCHECKSUM_ERROR),
- STAT_BIT(val, TXECC_MULTIBIT_ERROR),
- STAT_BIT(val, TXECC_SINGLE_BIT_ERROR),
- STAT_BIT(val, TXFALSE_CONTROL_ERROR),
- STAT_BIT(val, RXDSI_VC_ID_INVALID),
- STAT_BIT(val, RXDSI_DATA_TYPE_NOT_REGOGNISED),
- STAT_BIT(val, RXCHECKSUM_ERROR),
- STAT_BIT(val, RXECC_MULTIBIT_ERROR),
- STAT_BIT(val, RXECC_SINGLE_BIT_ERROR),
- STAT_BIT(val, RXFALSE_CONTROL_ERROR),
- STAT_BIT(val, RXHS_RECEIVE_TIMEOUT_ERROR),
- STAT_BIT(val, RX_LP_TX_SYNC_ERROR),
- STAT_BIT(val, RXEXCAPE_MODE_ENTRY_ERROR),
- STAT_BIT(val, RXEOT_SYNC_ERROR),
- STAT_BIT(val, RXSOT_SYNC_ERROR),
- STAT_BIT(val, RXSOT_ERROR));
-#undef STAT_BIT
-}
-
-enum dsi_type {
- DSI_DCS,
- DSI_GENERIC,
-};
-
-/* enable or disable command mode hs transmissions */
-void dsi_hs_mode_enable(struct intel_dsi *intel_dsi, bool enable)
-{
- struct drm_encoder *encoder = &intel_dsi->base.base;
- struct drm_device *dev = encoder->dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
- enum pipe pipe = intel_crtc->pipe;
- u32 temp;
- u32 mask = DBI_FIFO_EMPTY;
-
- if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(pipe)) & mask) == mask, 50))
- DRM_ERROR("Timeout waiting for DBI FIFO empty\n");
-
- temp = I915_READ(MIPI_HS_LP_DBI_ENABLE(pipe));
- temp &= DBI_HS_LP_MODE_MASK;
- I915_WRITE(MIPI_HS_LP_DBI_ENABLE(pipe), enable ? DBI_HS_MODE : DBI_LP_MODE);
-
- intel_dsi->hs = enable;
-}
-
-static int dsi_vc_send_short(struct intel_dsi *intel_dsi, int channel,
- u8 data_type, u16 data)
-{
- struct drm_encoder *encoder = &intel_dsi->base.base;
- struct drm_device *dev = encoder->dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
- enum pipe pipe = intel_crtc->pipe;
- u32 ctrl_reg;
- u32 ctrl;
- u32 mask;
-
- DRM_DEBUG_KMS("channel %d, data_type %d, data %04x\n",
- channel, data_type, data);
-
- if (intel_dsi->hs) {
- ctrl_reg = MIPI_HS_GEN_CTRL(pipe);
- mask = HS_CTRL_FIFO_FULL;
- } else {
- ctrl_reg = MIPI_LP_GEN_CTRL(pipe);
- mask = LP_CTRL_FIFO_FULL;
- }
-
- if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(pipe)) & mask) == 0, 50)) {
- DRM_ERROR("Timeout waiting for HS/LP CTRL FIFO !full\n");
- print_stat(intel_dsi);
- }
-
- /*
- * Note: This function is also used for long packets, with length passed
- * as data, since SHORT_PACKET_PARAM_SHIFT ==
- * LONG_PACKET_WORD_COUNT_SHIFT.
- */
- ctrl = data << SHORT_PACKET_PARAM_SHIFT |
- channel << VIRTUAL_CHANNEL_SHIFT |
- data_type << DATA_TYPE_SHIFT;
-
- I915_WRITE(ctrl_reg, ctrl);
-
- return 0;
-}
-
-static int dsi_vc_send_long(struct intel_dsi *intel_dsi, int channel,
- u8 data_type, const u8 *data, int len)
-{
- struct drm_encoder *encoder = &intel_dsi->base.base;
- struct drm_device *dev = encoder->dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
- enum pipe pipe = intel_crtc->pipe;
- u32 data_reg;
- int i, j, n;
- u32 mask;
-
- DRM_DEBUG_KMS("channel %d, data_type %d, len %04x\n",
- channel, data_type, len);
-
- if (intel_dsi->hs) {
- data_reg = MIPI_HS_GEN_DATA(pipe);
- mask = HS_DATA_FIFO_FULL;
- } else {
- data_reg = MIPI_LP_GEN_DATA(pipe);
- mask = LP_DATA_FIFO_FULL;
- }
-
- if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(pipe)) & mask) == 0, 50))
- DRM_ERROR("Timeout waiting for HS/LP DATA FIFO !full\n");
-
- for (i = 0; i < len; i += n) {
- u32 val = 0;
- n = min_t(int, len - i, 4);
-
- for (j = 0; j < n; j++)
- val |= *data++ << 8 * j;
-
- I915_WRITE(data_reg, val);
- /* XXX: check for data fifo full, once that is set, write 4
- * dwords, then wait for not set, then continue. */
- }
-
- return dsi_vc_send_short(intel_dsi, channel, data_type, len);
-}
-
-static int dsi_vc_write_common(struct intel_dsi *intel_dsi,
- int channel, const u8 *data, int len,
- enum dsi_type type)
-{
- int ret;
-
- if (len == 0) {
- BUG_ON(type == DSI_GENERIC);
- ret = dsi_vc_send_short(intel_dsi, channel,
- MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM,
- 0);
- } else if (len == 1) {
- ret = dsi_vc_send_short(intel_dsi, channel,
- type == DSI_GENERIC ?
- MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM :
- MIPI_DSI_DCS_SHORT_WRITE, data[0]);
- } else if (len == 2) {
- ret = dsi_vc_send_short(intel_dsi, channel,
- type == DSI_GENERIC ?
- MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM :
- MIPI_DSI_DCS_SHORT_WRITE_PARAM,
- (data[1] << 8) | data[0]);
- } else {
- ret = dsi_vc_send_long(intel_dsi, channel,
- type == DSI_GENERIC ?
- MIPI_DSI_GENERIC_LONG_WRITE :
- MIPI_DSI_DCS_LONG_WRITE, data, len);
- }
-
- return ret;
-}
-
-int dsi_vc_dcs_write(struct intel_dsi *intel_dsi, int channel,
- const u8 *data, int len)
-{
- return dsi_vc_write_common(intel_dsi, channel, data, len, DSI_DCS);
-}
-
-int dsi_vc_generic_write(struct intel_dsi *intel_dsi, int channel,
- const u8 *data, int len)
-{
- return dsi_vc_write_common(intel_dsi, channel, data, len, DSI_GENERIC);
-}
-
-static int dsi_vc_dcs_send_read_request(struct intel_dsi *intel_dsi,
- int channel, u8 dcs_cmd)
-{
- return dsi_vc_send_short(intel_dsi, channel, MIPI_DSI_DCS_READ,
- dcs_cmd);
-}
-
-static int dsi_vc_generic_send_read_request(struct intel_dsi *intel_dsi,
- int channel, u8 *reqdata,
- int reqlen)
-{
- u16 data;
- u8 data_type;
-
- switch (reqlen) {
- case 0:
- data_type = MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM;
- data = 0;
- break;
- case 1:
- data_type = MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM;
- data = reqdata[0];
- break;
- case 2:
- data_type = MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM;
- data = (reqdata[1] << 8) | reqdata[0];
- break;
- default:
- BUG();
- }
-
- return dsi_vc_send_short(intel_dsi, channel, data_type, data);
-}
-
-static int dsi_read_data_return(struct intel_dsi *intel_dsi,
- u8 *buf, int buflen)
-{
- struct drm_encoder *encoder = &intel_dsi->base.base;
- struct drm_device *dev = encoder->dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
- enum pipe pipe = intel_crtc->pipe;
- int i, len = 0;
- u32 data_reg, val;
-
- if (intel_dsi->hs) {
- data_reg = MIPI_HS_GEN_DATA(pipe);
- } else {
- data_reg = MIPI_LP_GEN_DATA(pipe);
- }
-
- while (len < buflen) {
- val = I915_READ(data_reg);
- for (i = 0; i < 4 && len < buflen; i++, len++)
- buf[len] = val >> 8 * i;
- }
-
- return len;
-}
-
-int dsi_vc_dcs_read(struct intel_dsi *intel_dsi, int channel, u8 dcs_cmd,
- u8 *buf, int buflen)
-{
- struct drm_encoder *encoder = &intel_dsi->base.base;
- struct drm_device *dev = encoder->dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
- enum pipe pipe = intel_crtc->pipe;
- u32 mask;
- int ret;
-
- /*
- * XXX: should issue multiple read requests and reads if request is
- * longer than MIPI_MAX_RETURN_PKT_SIZE
- */
-
- I915_WRITE(MIPI_INTR_STAT(pipe), GEN_READ_DATA_AVAIL);
-
- ret = dsi_vc_dcs_send_read_request(intel_dsi, channel, dcs_cmd);
- if (ret)
- return ret;
-
- mask = GEN_READ_DATA_AVAIL;
- if (wait_for((I915_READ(MIPI_INTR_STAT(pipe)) & mask) == mask, 50))
- DRM_ERROR("Timeout waiting for read data.\n");
-
- ret = dsi_read_data_return(intel_dsi, buf, buflen);
- if (ret < 0)
- return ret;
-
- if (ret != buflen)
- return -EIO;
-
- return 0;
-}
-
-int dsi_vc_generic_read(struct intel_dsi *intel_dsi, int channel,
- u8 *reqdata, int reqlen, u8 *buf, int buflen)
-{
- struct drm_encoder *encoder = &intel_dsi->base.base;
- struct drm_device *dev = encoder->dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
- enum pipe pipe = intel_crtc->pipe;
- u32 mask;
- int ret;
-
- /*
- * XXX: should issue multiple read requests and reads if request is
- * longer than MIPI_MAX_RETURN_PKT_SIZE
- */
-
- I915_WRITE(MIPI_INTR_STAT(pipe), GEN_READ_DATA_AVAIL);
-
- ret = dsi_vc_generic_send_read_request(intel_dsi, channel, reqdata,
- reqlen);
- if (ret)
- return ret;
-
- mask = GEN_READ_DATA_AVAIL;
- if (wait_for((I915_READ(MIPI_INTR_STAT(pipe)) & mask) == mask, 50))
- DRM_ERROR("Timeout waiting for read data.\n");
-
- ret = dsi_read_data_return(intel_dsi, buf, buflen);
- if (ret < 0)
- return ret;
-
- if (ret != buflen)
- return -EIO;
-
- return 0;
-}
-
-/*
- * send a video mode command
- *
- * XXX: commands with data in MIPI_DPI_DATA?
- */
-int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs)
-{
- struct drm_encoder *encoder = &intel_dsi->base.base;
- struct drm_device *dev = encoder->dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
- enum pipe pipe = intel_crtc->pipe;
- u32 mask;
-
- /* XXX: pipe, hs */
- if (hs)
- cmd &= ~DPI_LP_MODE;
- else
- cmd |= DPI_LP_MODE;
-
- /* clear bit */
- I915_WRITE(MIPI_INTR_STAT(pipe), SPL_PKT_SENT_INTERRUPT);
-
- /* XXX: old code skips write if control unchanged */
- if (cmd == I915_READ(MIPI_DPI_CONTROL(pipe)))
- DRM_ERROR("Same special packet %02x twice in a row.\n", cmd);
-
- I915_WRITE(MIPI_DPI_CONTROL(pipe), cmd);
-
- mask = SPL_PKT_SENT_INTERRUPT;
- if (wait_for((I915_READ(MIPI_INTR_STAT(pipe)) & mask) == mask, 100))
- DRM_ERROR("Video mode command 0x%08x send failed.\n", cmd);
-
- return 0;
-}
-
-void wait_for_dsi_fifo_empty(struct intel_dsi *intel_dsi)
-{
- struct drm_encoder *encoder = &intel_dsi->base.base;
- struct drm_device *dev = encoder->dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
- struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
- enum pipe pipe = intel_crtc->pipe;
- u32 mask;
-
- mask = LP_CTRL_FIFO_EMPTY | HS_CTRL_FIFO_EMPTY |
- LP_DATA_FIFO_EMPTY | HS_DATA_FIFO_EMPTY;
-
- if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(pipe)) & mask) == mask, 100))
- DRM_ERROR("DPI FIFOs are not empty\n");
-}
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