static void intel_dsi_disable(struct intel_encoder *encoder)
{
#ifndef BYT_DUAL_MIPI_DSI
struct drm_encoder *drm_encoder = &encoder->base;
struct drm_device *dev = encoder->base.dev;
#endif
//struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
//struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
DRM_DEBUG_KMS("\n");
//XXX dual display use mipi backlight for debug only
#ifndef BYT_DUAL_MIPI_DSI
intel_panel_disable_backlight(dev);
#endif
if (intel_dsi->backlight_off_delay >= 20)
msleep(intel_dsi->backlight_off_delay);
else
usleep_range(intel_dsi->backlight_off_delay * 1000,
(intel_dsi->backlight_off_delay * 1000) + 500);
if (is_cmd_mode(intel_dsi)) {
/* XXX Impementation TBD */
} else {
/* Send Shutdown command to the panel in LP mode */
intel_dsi->hs = 1;
dpi_send_cmd(intel_dsi, SHUTDOWN);
usleep_range(1000, 1500);
}
}
u32 bxt_dsi_get_pclk(struct intel_encoder *encoder, int pipe_bpp,
struct intel_crtc_state *config)
{
u32 pclk;
u32 dsi_clk;
u32 dsi_ratio;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
/* Divide by zero */
if (!pipe_bpp) {
DRM_ERROR("Invalid BPP(0)\n");
return 0;
}
config->dsi_pll.ctrl = I915_READ(BXT_DSI_PLL_CTL);
dsi_ratio = config->dsi_pll.ctrl & BXT_DSI_PLL_RATIO_MASK;
dsi_clk = (dsi_ratio * BXT_REF_CLOCK_KHZ) / 2;
/* pixel_format and pipe_bpp should agree */
assert_bpp_mismatch(intel_dsi->pixel_format, pipe_bpp);
pclk = DIV_ROUND_CLOSEST(dsi_clk * intel_dsi->lane_count, pipe_bpp);
DRM_DEBUG_DRIVER("Calculated pclk=%u\n", pclk);
return pclk;
}
static void intel_dsi_pre_enable(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
int pipe = intel_crtc->pipe;
DRM_DEBUG_KMS("\n");
intel_enable_dsi_pll(intel_dsi);
if (is_cmd_mode(intel_dsi)) {
/* XXX: Implement me */
I915_WRITE(MIPI_MAX_RETURN_PKT_SIZE(pipe), 8 * 4);
}
else {
intel_dsi->hs = 0;
dpi_send_cmd(intel_dsi, TURN_ON);
usleep_range(1000, 1500);
if (intel_dsi->dev.dev_ops->enable)
intel_dsi->dev.dev_ops->enable(&intel_dsi->dev);
intel_dsi_port_enable(encoder);
}
}
static void intel_dsi_enable(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
int pipe = intel_crtc->pipe;
u32 temp;
DRM_DEBUG_KMS("\n");
if (is_cmd_mode(intel_dsi))
I915_WRITE(MIPI_MAX_RETURN_PKT_SIZE(pipe), 8 * 4);
else {
msleep(20); /* XXX */
dpi_send_cmd(intel_dsi, TURN_ON);
msleep(100);
/* assert ip_tg_enable signal */
temp = I915_READ(MIPI_PORT_CTRL(pipe)) & ~LANE_CONFIGURATION_MASK;
temp = temp | intel_dsi->port_bits;
I915_WRITE(MIPI_PORT_CTRL(pipe), temp | DPI_ENABLE);
POSTING_READ(MIPI_PORT_CTRL(pipe));
}
if (intel_dsi->dev.dev_ops->enable)
intel_dsi->dev.dev_ops->enable(&intel_dsi->dev);
}
static void dsi_config(struct drm_encoder *encoder)
{
struct drm_device *dev = encoder->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
int pipe = intel_crtc->pipe;
u32 tmp;
DRM_DEBUG_KMS("\n");
/* escape clock divider, 20MHz, shared for A and C. device ready must be
* off when doing this! txclkesc? */
tmp = I915_READ(MIPI_CTRL(0));
tmp &= ~ESCAPE_CLOCK_DIVIDER_MASK;
I915_WRITE(MIPI_CTRL(0), tmp | ESCAPE_CLOCK_DIVIDER_1);
/* read request priority is per pipe */
tmp = I915_READ(MIPI_CTRL(pipe));
tmp &= ~READ_REQUEST_PRIORITY_MASK;
I915_WRITE(MIPI_CTRL(pipe), tmp | READ_REQUEST_PRIORITY_HIGH);
/* XXX: why here, why like this? handling in irq handler?! */
I915_WRITE(MIPI_INTR_EN(pipe), 0xffffffff);
/* why here, was elsewhere... also 2a, 0c, 60, 08 for values */
I915_WRITE(MIPI_DPHY_PARAM(pipe), intel_dsi->dphy_reg);
}
static void intel_dsi_disable(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
int pipe = intel_crtc->pipe;
u32 temp;
DRM_DEBUG_KMS("\n");
if (is_vid_mode(intel_dsi)) {
dpi_send_cmd(intel_dsi, SHUTDOWN);
msleep(10);
/* de-assert ip_tg_enable signal */
temp = I915_READ(MIPI_PORT_CTRL(pipe));
I915_WRITE(MIPI_PORT_CTRL(pipe), temp & ~DPI_ENABLE);
POSTING_READ(MIPI_PORT_CTRL(pipe));
msleep(2);
}
/* if disable packets are sent before sending shutdown packet then in
* some next enable sequence send turn on packet error is observed */
if (intel_dsi->dev.dev_ops->disable)
intel_dsi->dev.dev_ops->disable(&intel_dsi->dev);
}
static void bxt_enable_dsi_pll(struct intel_encoder *encoder,
const struct intel_crtc_state *config)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum port port;
u32 val;
DRM_DEBUG_KMS("\n");
/* Configure PLL vales */
I915_WRITE(BXT_DSI_PLL_CTL, config->dsi_pll.ctrl);
POSTING_READ(BXT_DSI_PLL_CTL);
/* Program TX, RX, Dphy clocks */
for_each_dsi_port(port, intel_dsi->ports)
bxt_dsi_program_clocks(encoder->base.dev, port, config);
/* Enable DSI PLL */
val = I915_READ(BXT_DSI_PLL_ENABLE);
val |= BXT_DSI_PLL_DO_ENABLE;
I915_WRITE(BXT_DSI_PLL_ENABLE, val);
/* Timeout and fail if PLL not locked */
if (intel_wait_for_register(dev_priv,
BXT_DSI_PLL_ENABLE,
BXT_DSI_PLL_LOCKED,
BXT_DSI_PLL_LOCKED,
1)) {
DRM_ERROR("Timed out waiting for DSI PLL to lock\n");
return;
}
DRM_DEBUG_KMS("DSI PLL locked\n");
}
static void intel_dsi_disable(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
int pipe = intel_crtc->pipe;
u32 temp;
DRM_DEBUG_KMS("\n");
intel_dsi->dev.dev_ops->disable(&intel_dsi->dev);
if (is_vid_mode(intel_dsi)) {
dpi_send_cmd(intel_dsi, SHUTDOWN);
msleep(10);
/* de-assert ip_tg_enable signal */
temp = I915_READ(MIPI_PORT_CTRL(pipe));
I915_WRITE(MIPI_PORT_CTRL(pipe), temp & ~DPI_ENABLE);
POSTING_READ(MIPI_PORT_CTRL(pipe));
msleep(2);
}
temp = I915_READ(MIPI_DEVICE_READY(pipe));
if (temp & DEVICE_READY) {
temp &= ~DEVICE_READY;
temp &= ~ULPS_STATE_MASK;
I915_WRITE(MIPI_DEVICE_READY(pipe), temp);
}
}
/*
* XXX: The muxing and gating is hard coded for now. Need to add support for
* sharing PLLs with two DSI outputs.
*/
int vlv_dsi_pll_compute(struct intel_encoder *encoder,
struct intel_crtc_state *config)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
int ret;
u32 dsi_clk;
dsi_clk = dsi_clk_from_pclk(intel_dsi->pclk, intel_dsi->pixel_format,
intel_dsi->lane_count);
ret = dsi_calc_mnp(dev_priv, config, dsi_clk);
if (ret) {
DRM_DEBUG_KMS("dsi_calc_mnp failed\n");
return ret;
}
if (intel_dsi->ports & (1 << PORT_A))
config->dsi_pll.ctrl |= DSI_PLL_CLK_GATE_DSI0_DSIPLL;
if (intel_dsi->ports & (1 << PORT_C))
config->dsi_pll.ctrl |= DSI_PLL_CLK_GATE_DSI1_DSIPLL;
config->dsi_pll.ctrl |= DSI_PLL_VCO_EN;
DRM_DEBUG_KMS("dsi pll div %08x, ctrl %08x\n",
config->dsi_pll.div, config->dsi_pll.ctrl);
return 0;
}
void intel_dsi_port_enable(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
int pipe = intel_crtc->pipe;
u32 val, port_control = 0;
if (intel_dsi->dual_link) {
port_control = (intel_dsi->dual_link - 1)
<< DUAL_LINK_MODE_SHIFT;
if (pipe == PIPE_A)
port_control |= LANE_CONFIGURATION_DUAL_LINK_A;
else
port_control |= LANE_CONFIGURATION_DUAL_LINK_B;
/*Pixel overlap count; only for VLV CO stepping */
if (IS_VALLEYVIEW_C0(dev) && (intel_dsi->dual_link & MIPI_DUAL_LINK_FRONT_BACK)) {
val = I915_READ(VLV_CHICKEN_3);
val &= ~PIXEL_OVERLAP_CNT_MASK |
intel_dsi->pixel_overlap <<
PIXEL_OVERLAP_CNT_SHIFT;
I915_WRITE(VLV_CHICKEN_3, val);
}
/* Port A */
val = I915_READ(MIPI_PORT_CTRL(0));
val = val | port_control;
I915_WRITE(MIPI_PORT_CTRL(0), val | DPI_ENABLE);
if (!IS_VALLEYVIEW_C0(dev)) {
/* for stepping before C0; we need to enable
* PORTC explicitly. From C0 onwards enable PORT A
* also enabled PORT C for dual link
*/
val = I915_READ(MIPI_PORT_CTRL(1));
I915_WRITE(MIPI_PORT_CTRL(1), val | DPI_ENABLE);
} else {
if (intel_crtc->config.dither) {
val = I915_READ(MIPI_PORT_CTRL(0));
val = val | DITHERING_ENABLE;
I915_WRITE(MIPI_PORT_CTRL(0), val);
val = I915_READ(MIPI_PORT_CTRL(1));
val = val | DITHERING_ENABLE;
I915_WRITE(MIPI_PORT_CTRL(1), val);
}
}
usleep_range(2000, 2500);
} else {
val = I915_READ(MIPI_PORT_CTRL(pipe));
val = val | port_control;
if (intel_crtc->config.dither && IS_VALLEYVIEW_C0(dev))
val |= DITHERING_ENABLE;
I915_WRITE(MIPI_PORT_CTRL(pipe), val | DPI_ENABLE);
usleep_range(2000, 2500);
}
}
static void set_dsi_timings(struct drm_encoder *encoder,
const struct drm_display_mode *mode)
{
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);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
int pipe = intel_crtc->pipe;
unsigned int bpp = intel_crtc->config.pipe_bpp;
unsigned int lane_count = intel_dsi->lane_count;
u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp;
hactive = mode->hdisplay;
hfp = mode->hsync_start - mode->hdisplay;
hsync = mode->hsync_end - mode->hsync_start;
hbp = mode->htotal - mode->hsync_end;
vfp = mode->vsync_start - mode->vdisplay;
vsync = mode->vsync_end - mode->vsync_start;
vbp = mode->vtotal - mode->vsync_end;
/* horizontal values are in terms of high speed byte clock */
hactive = txbyteclkhs(hactive, bpp, lane_count);
hfp = txbyteclkhs(hfp, bpp, lane_count);
hsync = txbyteclkhs(hsync, bpp, lane_count);
hbp = txbyteclkhs(hbp, bpp, lane_count);
/* FIXME: Find better way to do this */
/* For 7x10 panel we need to have BLLP added to active */
/* Trying to find optimal BLLP Multiplier */
/* 2.875 - Original multiplier, Works with flicker */
/* 2.000 - works but still some flicker */
/* 1.500 - Works, No Flicker */
/* 1.250 - Works, No Flicker */
/* 1.100 - Doesn't work */
/* FIXME: Acer Mango spec requires to run the DSI clock at 500 to
* 560Mbps. Recomendation is to run at 513 Mbps. The addition dsi
* clock is to be filled with NULL packets. Refer to acer panel
* spec for more details.
*/
if (dev_priv->mipi_panel_id == MIPI_DSI_AUO_B080XAT_PANEL_ID)
hactive = (hactive * 10) / 8;
I915_WRITE(MIPI_HACTIVE_AREA_COUNT(pipe), hactive);
I915_WRITE(MIPI_HFP_COUNT(pipe), hfp);
/* meaningful for video mode non-burst sync pulse mode only, can be zero
* for non-burst sync events and burst modes */
I915_WRITE(MIPI_HSYNC_PADDING_COUNT(pipe), hsync);
I915_WRITE(MIPI_HBP_COUNT(pipe), hbp);
/* vertical values are in terms of lines */
I915_WRITE(MIPI_VFP_COUNT(pipe), vfp);
I915_WRITE(MIPI_VSYNC_PADDING_COUNT(pipe), vsync);
I915_WRITE(MIPI_VBP_COUNT(pipe), vbp);
}
void intel_dsi_clear_device_ready(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
int pipe = intel_crtc->pipe;
u32 val;
DRM_DEBUG_KMS("\n");
I915_WRITE_BITS(MIPI_DEVICE_READY(pipe), ULPS_STATE_ENTER | DEVICE_READY,
ULPS_STATE_MASK | DEVICE_READY);
usleep_range(2000, 2500);
I915_WRITE_BITS(MIPI_DEVICE_READY(pipe), ULPS_STATE_EXIT | DEVICE_READY,
ULPS_STATE_MASK | DEVICE_READY);
usleep_range(2000, 2500);
I915_WRITE_BITS(MIPI_DEVICE_READY(pipe), ULPS_STATE_ENTER | DEVICE_READY,
ULPS_STATE_MASK | DEVICE_READY);
usleep_range(2000, 2500);
if (wait_for(((I915_READ(MIPI_PORT_CTRL(pipe)) & 0x20000)
== 0x00000), 30))
DRM_ERROR("DSI LP not going Low\n");
I915_WRITE_BITS(MIPI_PORT_CTRL(pipe), 0, LP_OUTPUT_HOLD);
usleep_range(1000, 1500);
I915_WRITE_BITS(MIPI_DEVICE_READY(pipe), 0x00, DEVICE_READY);
usleep_range(2000, 2500);
intel_disable_dsi_pll(intel_dsi);
val = I915_READ(DSPCLK_GATE_D);
val &= ~VSUNIT_CLOCK_GATE_DISABLE;
I915_WRITE(DSPCLK_GATE_D, val);
if (intel_dsi->dev.dev_ops->disable_panel_power)
intel_dsi->dev.dev_ops->disable_panel_power(&intel_dsi->dev);
#ifdef CONFIG_CRYSTAL_COVE
if (BYT_CR_CONFIG) {
/* Disable Panel */
vlv_gpio_nc_write(dev_priv, GPIO_NC_11_PCONF0, 0x2000CC00);
vlv_gpio_nc_write(dev_priv, GPIO_NC_11_PAD, 0x00000004);
udelay(500);
} else
intel_mid_pmic_writeb(PMIC_PANEL_EN, 0x00);
#else
/* need to code for BYT-CR for example where things have changed */
DRM_ERROR("PANEL Disable to supported yet\n");
#endif
msleep(intel_dsi->panel_off_delay);
msleep(intel_dsi->panel_pwr_cycle_delay);
}
static void intel_dsi_post_disable(struct intel_encoder *encoder)
{
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
DRM_DEBUG_KMS("\n");
intel_dsi_clear_device_ready(encoder);
if (intel_dsi->dev.dev_ops->disable_panel_power)
intel_dsi->dev.dev_ops->disable_panel_power(&intel_dsi->dev);
}
void vlv_dsi_reset_clocks(struct intel_encoder *encoder, enum port port)
{
u32 temp;
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
temp = I915_READ(MIPI_CTRL(port));
temp &= ~ESCAPE_CLOCK_DIVIDER_MASK;
I915_WRITE(MIPI_CTRL(port), temp |
intel_dsi->escape_clk_div <<
ESCAPE_CLOCK_DIVIDER_SHIFT);
}
static void intel_dsi_pre_disable(struct intel_encoder *encoder)
{
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
DRM_DEBUG_KMS("\n");
if (is_vid_mode(intel_dsi)) {
/* Send Shutdown command to the panel in LP mode */
dpi_send_cmd(intel_dsi, SHUTDOWN, DPI_LP_MODE_EN);
msleep(10);
}
}
static void intel_dsi_post_disable(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
int pipe = intel_crtc->pipe;
u32 tmp;
int count = 1;
wait_for_dsi_fifo_empty(intel_dsi);
intel_dsi_port_disable(encoder);
/* Panel commands can be sent when clock is in LP11 */
if (intel_dsi->dual_link)
count = 2;
do {
tmp = I915_READ(MIPI_DEVICE_READY(pipe));
tmp &= ~DEVICE_READY;
I915_WRITE(MIPI_DEVICE_READY(pipe), tmp);
tmp = I915_READ(MIPI_CTRL(pipe));
tmp &= ~ESCAPE_CLOCK_DIVIDER_MASK;
I915_WRITE(MIPI_CTRL(pipe), tmp |
intel_dsi->escape_clk_div <<
ESCAPE_CLOCK_DIVIDER_SHIFT);
tmp = I915_READ(MIPI_DSI_FUNC_PRG(pipe));
tmp &= ~VID_MODE_FORMAT_MASK;
I915_WRITE(MIPI_DSI_FUNC_PRG(pipe), tmp);
I915_WRITE(MIPI_EOT_DISABLE(pipe), CLOCKSTOP);
tmp = I915_READ(MIPI_DSI_FUNC_PRG(pipe));
tmp &= ~VID_MODE_FORMAT_MASK;
I915_WRITE(MIPI_DSI_FUNC_PRG(pipe), tmp);
tmp = I915_READ(MIPI_DEVICE_READY(pipe));
tmp &= DEVICE_READY;
I915_WRITE(MIPI_DEVICE_READY(pipe), tmp);
pipe = PIPE_B;
} while (--count > 0);
/* if disable packets are sent before sending shutdown packet then in
* some next enable sequence send turn on packet error is observed */
if (intel_dsi->dev.dev_ops->disable)
intel_dsi->dev.dev_ops->disable(&intel_dsi->dev);
wait_for_dsi_fifo_empty(intel_dsi);
intel_dsi_clear_device_ready(encoder);
}
static void intel_dsi_enable(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
int pipe = intel_crtc->pipe;
/* Adjust backlight timing for specific panel */
if (intel_dsi->backlight_on_delay >= 20)
msleep(intel_dsi->backlight_on_delay);
else
usleep_range(intel_dsi->backlight_on_delay * 1000,
(intel_dsi->backlight_on_delay * 1000) + 500);
intel_panel_enable_backlight(dev, pipe);
}
static void intel_dsi_pre_enable(struct intel_encoder *encoder)
{
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
DRM_DEBUG_KMS("\n");
if (intel_dsi->dev.dev_ops->panel_reset)
intel_dsi->dev.dev_ops->panel_reset(&intel_dsi->dev);
/* put device in ready state */
intel_dsi_device_ready(encoder);
if (intel_dsi->dev.dev_ops->send_otp_cmds)
intel_dsi->dev.dev_ops->send_otp_cmds(&intel_dsi->dev);
}
int bxt_dsi_pll_compute(struct intel_encoder *encoder,
struct intel_crtc_state *config)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
u8 dsi_ratio, dsi_ratio_min, dsi_ratio_max;
u32 dsi_clk;
dsi_clk = dsi_clk_from_pclk(intel_dsi->pclk, intel_dsi->pixel_format,
intel_dsi->lane_count);
/*
* From clock diagram, to get PLL ratio divider, divide double of DSI
* link rate (i.e., 2*8x=16x frequency value) by ref clock. Make sure to
* round 'up' the result
*/
dsi_ratio = DIV_ROUND_UP(dsi_clk * 2, BXT_REF_CLOCK_KHZ);
if (IS_BROXTON(dev_priv)) {
dsi_ratio_min = BXT_DSI_PLL_RATIO_MIN;
dsi_ratio_max = BXT_DSI_PLL_RATIO_MAX;
} else {
dsi_ratio_min = GLK_DSI_PLL_RATIO_MIN;
dsi_ratio_max = GLK_DSI_PLL_RATIO_MAX;
}
if (dsi_ratio < dsi_ratio_min || dsi_ratio > dsi_ratio_max) {
DRM_ERROR("Cant get a suitable ratio from DSI PLL ratios\n");
return -ECHRNG;
} else
DRM_DEBUG_KMS("DSI PLL calculation is Done!!\n");
/*
* Program DSI ratio and Select MIPIC and MIPIA PLL output as 8x
* Spec says both have to be programmed, even if one is not getting
* used. Configure MIPI_CLOCK_CTL dividers in modeset
*/
config->dsi_pll.ctrl = dsi_ratio | BXT_DSIA_16X_BY2 | BXT_DSIC_16X_BY2;
/* As per recommendation from hardware team,
* Prog PVD ratio =1 if dsi ratio <= 50
*/
if (IS_BROXTON(dev_priv) && dsi_ratio <= 50)
config->dsi_pll.ctrl |= BXT_DSI_PLL_PVD_RATIO_1;
return 0;
}
static void intel_dsi_disable(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
int pipe = intel_crtc->pipe;
u32 temp;
DRM_DEBUG_KMS("\n");
if (is_vid_mode(intel_dsi)) {
wait_for_dsi_fifo_empty(intel_dsi);
/* de-assert ip_tg_enable signal */
temp = I915_READ(MIPI_PORT_CTRL(pipe));
I915_WRITE(MIPI_PORT_CTRL(pipe), temp & ~DPI_ENABLE);
POSTING_READ(MIPI_PORT_CTRL(pipe));
msleep(2);
}
/* Panel commands can be sent when clock is in LP11 */
I915_WRITE(MIPI_DEVICE_READY(pipe), 0x0);
temp = I915_READ(MIPI_CTRL(pipe));
temp &= ~ESCAPE_CLOCK_DIVIDER_MASK;
I915_WRITE(MIPI_CTRL(pipe), temp |
intel_dsi->escape_clk_div <<
ESCAPE_CLOCK_DIVIDER_SHIFT);
I915_WRITE(MIPI_EOT_DISABLE(pipe), CLOCKSTOP);
temp = I915_READ(MIPI_DSI_FUNC_PRG(pipe));
temp &= ~VID_MODE_FORMAT_MASK;
I915_WRITE(MIPI_DSI_FUNC_PRG(pipe), temp);
I915_WRITE(MIPI_DEVICE_READY(pipe), 0x1);
/* if disable packets are sent before sending shutdown packet then in
* some next enable sequence send turn on packet error is observed */
if (intel_dsi->dev.dev_ops->disable)
intel_dsi->dev.dev_ops->disable(&intel_dsi->dev);
wait_for_dsi_fifo_empty(intel_dsi);
}
static void set_dsi_timings(struct drm_encoder *encoder,
const struct drm_display_mode *mode)
{
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);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
int pipe = intel_crtc->pipe;
unsigned int bpp = intel_crtc->config.pipe_bpp;
unsigned int lane_count = intel_dsi->lane_count;
u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp;
hactive = mode->hdisplay;
hfp = mode->hsync_start - mode->hdisplay;
hsync = mode->hsync_end - mode->hsync_start;
hbp = mode->htotal - mode->hsync_end;
vfp = mode->vsync_start - mode->vdisplay;
vsync = mode->vsync_end - mode->vsync_start;
vbp = mode->vtotal - mode->vsync_end;
/* horizontal values are in terms of high speed byte clock */
hactive = txbyteclkhs(hactive, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hfp = txbyteclkhs(hfp, bpp, lane_count, intel_dsi->burst_mode_ratio);
hsync = txbyteclkhs(hsync, bpp, lane_count,
intel_dsi->burst_mode_ratio);
hbp = txbyteclkhs(hbp, bpp, lane_count, intel_dsi->burst_mode_ratio);
I915_WRITE(MIPI_HACTIVE_AREA_COUNT(pipe), hactive);
I915_WRITE(MIPI_HFP_COUNT(pipe), hfp);
/* meaningful for video mode non-burst sync pulse mode only, can be zero
* for non-burst sync events and burst modes */
I915_WRITE(MIPI_HSYNC_PADDING_COUNT(pipe), hsync);
I915_WRITE(MIPI_HBP_COUNT(pipe), hbp);
/* vertical values are in terms of lines */
I915_WRITE(MIPI_VFP_COUNT(pipe), vfp);
I915_WRITE(MIPI_VSYNC_PADDING_COUNT(pipe), vsync);
I915_WRITE(MIPI_VBP_COUNT(pipe), vbp);
}
static void intel_dsi_pre_enable(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
enum pipe pipe = intel_crtc->pipe;
u32 tmp;
DRM_DEBUG_KMS("\n");
/* Disable DPOunit clock gating, can stall pipe
* and we need DPLL REFA always enabled */
tmp = I915_READ(DPLL(pipe));
tmp |= DPLL_REFA_CLK_ENABLE_VLV;
I915_WRITE(DPLL(pipe), tmp);
/* update the hw state for DPLL */
intel_crtc->config.dpll_hw_state.dpll = DPLL_INTEGRATED_CLOCK_VLV |
DPLL_REFA_CLK_ENABLE_VLV;
tmp = I915_READ(DSPCLK_GATE_D);
tmp |= DPOUNIT_CLOCK_GATE_DISABLE;
I915_WRITE(DSPCLK_GATE_D, tmp);
/* put device in ready state */
intel_dsi_device_ready(encoder);
msleep(intel_dsi->panel_on_delay);
if (intel_dsi->dev.dev_ops->panel_reset)
intel_dsi->dev.dev_ops->panel_reset(&intel_dsi->dev);
if (intel_dsi->dev.dev_ops->send_otp_cmds)
intel_dsi->dev.dev_ops->send_otp_cmds(&intel_dsi->dev);
wait_for_dsi_fifo_empty(intel_dsi);
/* Enable port in pre-enable phase itself because as per hw team
* recommendation, port should be enabled befor plane & pipe */
intel_dsi_enable(encoder);
}
static void intel_dsi_enable(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
int pipe = intel_crtc->pipe;
u32 temp;
DRM_DEBUG_KMS("\n");
temp = I915_READ(MIPI_DEVICE_READY(pipe));
if ((temp & DEVICE_READY) == 0) {
temp &= ~ULPS_STATE_MASK;
I915_WRITE(MIPI_DEVICE_READY(pipe), temp | DEVICE_READY);
} else if (temp & ULPS_STATE_MASK) {
temp &= ~ULPS_STATE_MASK;
I915_WRITE(MIPI_DEVICE_READY(pipe), temp | ULPS_STATE_EXIT);
/*
* We need to ensure that there is a minimum of 1 ms time
* available before clearing the UPLS exit state.
*/
msleep(2);
I915_WRITE(MIPI_DEVICE_READY(pipe), temp);
}
if (is_cmd_mode(intel_dsi))
I915_WRITE(MIPI_MAX_RETURN_PKT_SIZE(pipe), 8 * 4);
if (is_vid_mode(intel_dsi)) {
msleep(20); /* XXX */
dpi_send_cmd(intel_dsi, TURN_ON);
msleep(100);
/* assert ip_tg_enable signal */
temp = I915_READ(MIPI_PORT_CTRL(pipe));
I915_WRITE(MIPI_PORT_CTRL(pipe), temp | DPI_ENABLE);
POSTING_READ(MIPI_PORT_CTRL(pipe));
}
intel_dsi->dev.dev_ops->enable(&intel_dsi->dev);
}
void intel_dsi_port_disable(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
int pipe = intel_crtc->pipe;
if (intel_dsi->dual_link) {
I915_WRITE_BITS(MIPI_PORT_CTRL(0), 0, DPI_ENABLE);
POSTING_READ(MIPI_PORT_CTRL(0));
I915_WRITE_BITS(MIPI_PORT_CTRL(1), 0, DPI_ENABLE);
POSTING_READ(MIPI_PORT_CTRL(1));
} else {
I915_WRITE_BITS(MIPI_PORT_CTRL(pipe), 0, DPI_ENABLE);
POSTING_READ(MIPI_PORT_CTRL(pipe));
}
usleep_range(2000, 2500);
}
static void intel_dsi_post_disable(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
u32 val;
DRM_DEBUG_KMS("\n");
intel_dsi_disable(encoder);
intel_dsi_clear_device_ready(encoder);
val = I915_READ(DSPCLK_GATE_D);
val &= ~DPOUNIT_CLOCK_GATE_DISABLE;
I915_WRITE(DSPCLK_GATE_D, val);
if (intel_dsi->dev.dev_ops->disable_panel_power)
intel_dsi->dev.dev_ops->disable_panel_power(&intel_dsi->dev);
msleep(intel_dsi->panel_off_delay);
msleep(intel_dsi->panel_pwr_cycle_delay);
}
static void intel_dsi_pre_enable(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
int pipe = intel_crtc->pipe;
bool is_dsi;
u32 temp;
DRM_DEBUG_KMS("\n");
is_dsi = intel_pipe_has_type(encoder->base.crtc, INTEL_OUTPUT_DSI);
intel_enable_dsi_pll(intel_dsi);
printk("====>DLP3430 debug 2.20.\n");
if (is_cmd_mode(intel_dsi)) {
/* XXX: Implement me */
I915_WRITE(MIPI_MAX_RETURN_PKT_SIZE(pipe), 8 * 4);
}
else {
intel_dsi->hs = 1;
dpi_send_cmd(intel_dsi, TURN_ON);
usleep_range(1000, 1500);
if (intel_dsi->dev.dev_ops->enable)
intel_dsi->dev.dev_ops->enable(&intel_dsi->dev);
temp = I915_READ(MIPI_PORT_CTRL(pipe));
temp = temp | intel_dsi->port_bits;
if (is_dsi && intel_crtc->config.dither)
temp |= DITHERING_ENABLE;
I915_WRITE(MIPI_PORT_CTRL(pipe), temp | DPI_ENABLE);
usleep_range(2000, 2500);
}
}
static int bxt_compute_dsi_pll(struct intel_encoder *encoder,
struct intel_crtc_state *config)
{
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
u8 dsi_ratio;
u32 dsi_clk;
dsi_clk = dsi_clk_from_pclk(intel_dsi->pclk, intel_dsi->pixel_format,
intel_dsi->lane_count);
/*
* From clock diagram, to get PLL ratio divider, divide double of DSI
* link rate (i.e., 2*8x=16x frequency value) by ref clock. Make sure to
* round 'up' the result
*/
dsi_ratio = DIV_ROUND_UP(dsi_clk * 2, BXT_REF_CLOCK_KHZ);
if (dsi_ratio < BXT_DSI_PLL_RATIO_MIN ||
dsi_ratio > BXT_DSI_PLL_RATIO_MAX) {
DRM_ERROR("Cant get a suitable ratio from DSI PLL ratios\n");
return -ECHRNG;
}
/*
* Program DSI ratio and Select MIPIC and MIPIA PLL output as 8x
* Spec says both have to be programmed, even if one is not getting
* used. Configure MIPI_CLOCK_CTL dividers in modeset
*/
config->dsi_pll.ctrl = dsi_ratio | BXT_DSIA_16X_BY2 | BXT_DSIC_16X_BY2;
/* As per recommendation from hardware team,
* Prog PVD ratio =1 if dsi ratio <= 50
*/
if (dsi_ratio <= 50)
config->dsi_pll.ctrl |= BXT_DSI_PLL_PVD_RATIO_1;
return 0;
}
static void intel_dsi_disable(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
DRM_DEBUG_KMS("\n");
intel_panel_disable_backlight(dev);
if (intel_dsi->backlight_off_delay >= 20)
msleep(intel_dsi->backlight_off_delay);
else
usleep_range(intel_dsi->backlight_off_delay * 1000,
(intel_dsi->backlight_off_delay * 1000) + 500);
if (is_cmd_mode(intel_dsi)) {
/* XXX Impementation TBD */
} else {
/* Send Shutdown command to the panel in LP mode */
intel_dsi->hs = 0;
dpi_send_cmd(intel_dsi, SHUTDOWN);
usleep_range(1000, 1500);
}
}
static void intel_dsi_mode_set(struct intel_encoder *intel_encoder)
{
struct drm_encoder *encoder = &intel_encoder->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);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
struct drm_display_mode *adjusted_mode =
&intel_crtc->config.adjusted_mode;
int pipe = intel_crtc->pipe;
unsigned int bpp = intel_crtc->config.pipe_bpp;
u32 val, tmp;
DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe));
/* XXX: Location of the call */
band_gap_reset(dev_priv);
/* escape clock divider, 20MHz, shared for A and C. device ready must be
* off when doing this! txclkesc? */
tmp = I915_READ(MIPI_CTRL(0));
tmp &= ~ESCAPE_CLOCK_DIVIDER_MASK;
I915_WRITE(MIPI_CTRL(0), tmp | ESCAPE_CLOCK_DIVIDER_1);
/* read request priority is per pipe */
tmp = I915_READ(MIPI_CTRL(pipe));
tmp &= ~READ_REQUEST_PRIORITY_MASK;
I915_WRITE(MIPI_CTRL(pipe), tmp | READ_REQUEST_PRIORITY_HIGH);
/* XXX: why here, why like this? handling in irq handler?! */
I915_WRITE(MIPI_INTR_STAT(pipe), 0xffffffff);
I915_WRITE(MIPI_INTR_EN(pipe), 0xffffffff);
I915_WRITE(MIPI_DPHY_PARAM(pipe), intel_dsi->dphy_reg);
I915_WRITE(MIPI_DPI_RESOLUTION(pipe),
adjusted_mode->vdisplay << VERTICAL_ADDRESS_SHIFT |
adjusted_mode->hdisplay << HORIZONTAL_ADDRESS_SHIFT);
set_dsi_timings(encoder, adjusted_mode);
val = intel_dsi->lane_count << DATA_LANES_PRG_REG_SHIFT;
if (is_cmd_mode(intel_dsi)) {
val |= intel_dsi->channel << CMD_MODE_CHANNEL_NUMBER_SHIFT;
val |= CMD_MODE_DATA_WIDTH_8_BIT; /* XXX */
} else {
val |= intel_dsi->channel << VID_MODE_CHANNEL_NUMBER_SHIFT;
/* XXX: cross-check bpp vs. pixel format? */
val |= intel_dsi->pixel_format;
}
I915_WRITE(MIPI_DSI_FUNC_PRG(pipe), val);
/* timeouts for recovery. one frame IIUC. if counter expires, EOT and
* stop state. */
/*
* In burst mode, value greater than one DPI line Time in byte clock
* (txbyteclkhs) To timeout this timer 1+ of the above said value is
* recommended.
*
* In non-burst mode, Value greater than one DPI frame time in byte
* clock(txbyteclkhs) To timeout this timer 1+ of the above said value
* is recommended.
*
* In DBI only mode, value greater than one DBI frame time in byte
* clock(txbyteclkhs) To timeout this timer 1+ of the above said value
* is recommended.
*/
if (is_vid_mode(intel_dsi) &&
intel_dsi->video_mode_format == VIDEO_MODE_BURST) {
I915_WRITE(MIPI_HS_TX_TIMEOUT(pipe),
txbyteclkhs(adjusted_mode->htotal, bpp,
intel_dsi->lane_count) + 1);
} else {
I915_WRITE(MIPI_HS_TX_TIMEOUT(pipe),
txbyteclkhs(adjusted_mode->vtotal *
adjusted_mode->htotal,
bpp, intel_dsi->lane_count) + 1);
}
I915_WRITE(MIPI_LP_RX_TIMEOUT(pipe), intel_dsi->lp_rx_timeout);
I915_WRITE(MIPI_TURN_AROUND_TIMEOUT(pipe), intel_dsi->turn_arnd_val);
I915_WRITE(MIPI_DEVICE_RESET_TIMER(pipe), intel_dsi->rst_timer_val);
/* dphy stuff */
/* in terms of low power clock */
I915_WRITE(MIPI_INIT_COUNT(pipe), txclkesc(ESCAPE_CLOCK_DIVIDER_1, 100));
/* recovery disables */
I915_WRITE(MIPI_EOT_DISABLE(pipe), intel_dsi->eot_disable);
/* in terms of txbyteclkhs. actual high to low switch +
* MIPI_STOP_STATE_STALL * MIPI_LP_BYTECLK.
*
* XXX: write MIPI_STOP_STATE_STALL?
*/
I915_WRITE(MIPI_HIGH_LOW_SWITCH_COUNT(pipe),
intel_dsi->hs_to_lp_count);
/* XXX: low power clock equivalence in terms of byte clock. the number
* of byte clocks occupied in one low power clock. based on txbyteclkhs
* and txclkesc. txclkesc time / txbyteclk time * (105 +
* MIPI_STOP_STATE_STALL) / 105.???
*/
I915_WRITE(MIPI_LP_BYTECLK(pipe), intel_dsi->lp_byte_clk);
/* the bw essential for transmitting 16 long packets containing 252
* bytes meant for dcs write memory command is programmed in this
* register in terms of byte clocks. based on dsi transfer rate and the
* number of lanes configured the time taken to transmit 16 long packets
* in a dsi stream varies. */
I915_WRITE(MIPI_DBI_BW_CTRL(pipe), intel_dsi->bw_timer);
I915_WRITE(MIPI_CLK_LANE_SWITCH_TIME_CNT(pipe),
intel_dsi->clk_lp_to_hs_count << LP_HS_SSW_CNT_SHIFT |
intel_dsi->clk_hs_to_lp_count << HS_LP_PWR_SW_CNT_SHIFT);
if (is_vid_mode(intel_dsi))
I915_WRITE(MIPI_VIDEO_MODE_FORMAT(pipe),
intel_dsi->video_frmt_cfg_bits |
intel_dsi->video_mode_format);
}
u32 vlv_dsi_get_pclk(struct intel_encoder *encoder, int pipe_bpp,
struct intel_crtc_state *config)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
u32 dsi_clock, pclk;
u32 pll_ctl, pll_div;
u32 m = 0, p = 0, n;
int refclk = IS_CHERRYVIEW(dev_priv) ? 100000 : 25000;
int i;
DRM_DEBUG_KMS("\n");
mutex_lock(&dev_priv->sb_lock);
pll_ctl = vlv_cck_read(dev_priv, CCK_REG_DSI_PLL_CONTROL);
pll_div = vlv_cck_read(dev_priv, CCK_REG_DSI_PLL_DIVIDER);
mutex_unlock(&dev_priv->sb_lock);
config->dsi_pll.ctrl = pll_ctl & ~DSI_PLL_LOCK;
config->dsi_pll.div = pll_div;
/* mask out other bits and extract the P1 divisor */
pll_ctl &= DSI_PLL_P1_POST_DIV_MASK;
pll_ctl = pll_ctl >> (DSI_PLL_P1_POST_DIV_SHIFT - 2);
/* N1 divisor */
n = (pll_div & DSI_PLL_N1_DIV_MASK) >> DSI_PLL_N1_DIV_SHIFT;
n = 1 << n; /* register has log2(N1) */
/* mask out the other bits and extract the M1 divisor */
pll_div &= DSI_PLL_M1_DIV_MASK;
pll_div = pll_div >> DSI_PLL_M1_DIV_SHIFT;
while (pll_ctl) {
pll_ctl = pll_ctl >> 1;
p++;
}
p--;
if (!p) {
DRM_ERROR("wrong P1 divisor\n");
return 0;
}
for (i = 0; i < ARRAY_SIZE(lfsr_converts); i++) {
if (lfsr_converts[i] == pll_div)
break;
}
if (i == ARRAY_SIZE(lfsr_converts)) {
DRM_ERROR("wrong m_seed programmed\n");
return 0;
}
m = i + 62;
dsi_clock = (m * refclk) / (p * n);
/* pixel_format and pipe_bpp should agree */
assert_bpp_mismatch(intel_dsi->pixel_format, pipe_bpp);
pclk = DIV_ROUND_CLOSEST(dsi_clock * intel_dsi->lane_count, pipe_bpp);
return pclk;
}