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);
}
示例#2
0
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_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);
}
示例#4
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);
}
示例#5
0
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);
}