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path: root/drivers/gpu/drm/i915/intel_dsi.c
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Diffstat (limited to 'drivers/gpu/drm/i915/intel_dsi.c')
-rw-r--r--drivers/gpu/drm/i915/intel_dsi.c67
1 files changed, 50 insertions, 17 deletions
diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index bfcefbf33709..5bd9e09ad3c5 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -92,6 +92,9 @@ static bool intel_dsi_compute_config(struct intel_encoder *encoder,
if (fixed_mode)
intel_fixed_panel_mode(fixed_mode, adjusted_mode);
+ /* DSI uses short packets for sync events, so clear mode flags for DSI */
+ adjusted_mode->flags = 0;
+
if (intel_dsi->dev.dev_ops->mode_fixup)
return intel_dsi->dev.dev_ops->mode_fixup(&intel_dsi->dev,
mode, adjusted_mode);
@@ -152,6 +155,8 @@ static void intel_dsi_enable(struct intel_encoder *encoder)
if (intel_dsi->dev.dev_ops->enable)
intel_dsi->dev.dev_ops->enable(&intel_dsi->dev);
+ wait_for_dsi_fifo_empty(intel_dsi);
+
/* assert ip_tg_enable signal */
temp = I915_READ(MIPI_PORT_CTRL(pipe)) & ~LANE_CONFIGURATION_MASK;
temp = temp | intel_dsi->port_bits;
@@ -177,6 +182,10 @@ static void intel_dsi_pre_enable(struct intel_encoder *encoder)
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);
@@ -192,6 +201,8 @@ static void intel_dsi_pre_enable(struct intel_encoder *encoder)
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);
@@ -232,6 +243,8 @@ static void intel_dsi_disable(struct intel_encoder *encoder)
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);
@@ -246,8 +259,8 @@ static void intel_dsi_disable(struct intel_encoder *encoder)
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);
+ intel_dsi->escape_clk_div <<
+ ESCAPE_CLOCK_DIVIDER_SHIFT);
I915_WRITE(MIPI_EOT_DISABLE(pipe), CLOCKSTOP);
@@ -261,6 +274,8 @@ static void intel_dsi_disable(struct intel_encoder *encoder)
* 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 intel_dsi_clear_device_ready(struct intel_encoder *encoder)
@@ -282,7 +297,7 @@ static void intel_dsi_clear_device_ready(struct intel_encoder *encoder)
usleep_range(2000, 2500);
if (wait_for(((I915_READ(MIPI_PORT_CTRL(pipe)) & AFE_LATCHOUT)
- == 0x00000), 30))
+ == 0x00000), 30))
DRM_ERROR("DSI LP not going Low\n");
val = I915_READ(MIPI_PORT_CTRL(pipe));
@@ -351,9 +366,21 @@ static bool intel_dsi_get_hw_state(struct intel_encoder *encoder,
static void intel_dsi_get_config(struct intel_encoder *encoder,
struct intel_crtc_config *pipe_config)
{
+ u32 pclk;
DRM_DEBUG_KMS("\n");
- /* XXX: read flags, set to adjusted_mode */
+ /*
+ * DPLL_MD is not used in case of DSI, reading will get some default value
+ * set dpll_md = 0
+ */
+ pipe_config->dpll_hw_state.dpll_md = 0;
+
+ pclk = vlv_get_dsi_pclk(encoder, pipe_config->pipe_bpp);
+ if (!pclk)
+ return;
+
+ pipe_config->adjusted_mode.crtc_clock = pclk;
+ pipe_config->port_clock = pclk;
}
static enum drm_mode_status
@@ -396,9 +423,11 @@ static u16 txclkesc(u32 divider, unsigned int us)
}
/* return pixels in terms of txbyteclkhs */
-static u16 txbyteclkhs(u16 pixels, int bpp, int lane_count)
+static u16 txbyteclkhs(u16 pixels, int bpp, int lane_count,
+ u16 burst_mode_ratio)
{
- return DIV_ROUND_UP(DIV_ROUND_UP(pixels * bpp, 8), lane_count);
+ return DIV_ROUND_UP(DIV_ROUND_UP(pixels * bpp * burst_mode_ratio,
+ 8 * 100), lane_count);
}
static void set_dsi_timings(struct drm_encoder *encoder,
@@ -424,10 +453,12 @@ static void set_dsi_timings(struct drm_encoder *encoder,
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);
+ 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);
@@ -514,12 +545,14 @@ static void intel_dsi_prepare(struct intel_encoder *intel_encoder)
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);
+ intel_dsi->lane_count,
+ intel_dsi->burst_mode_ratio) + 1);
} else {
I915_WRITE(MIPI_HS_TX_TIMEOUT(pipe),
txbyteclkhs(adjusted_mode->vtotal *
adjusted_mode->htotal,
- bpp, intel_dsi->lane_count) + 1);
+ bpp, intel_dsi->lane_count,
+ intel_dsi->burst_mode_ratio) + 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);
@@ -549,7 +582,7 @@ static void intel_dsi_prepare(struct intel_encoder *intel_encoder)
* XXX: write MIPI_STOP_STATE_STALL?
*/
I915_WRITE(MIPI_HIGH_LOW_SWITCH_COUNT(pipe),
- intel_dsi->hs_to_lp_count);
+ 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
@@ -574,10 +607,10 @@ static void intel_dsi_prepare(struct intel_encoder *intel_encoder)
* 64 like 1366 x 768. Enable RANDOM resolution support for such
* panels by default */
I915_WRITE(MIPI_VIDEO_MODE_FORMAT(pipe),
- intel_dsi->video_frmt_cfg_bits |
- intel_dsi->video_mode_format |
- IP_TG_CONFIG |
- RANDOM_DPI_DISPLAY_RESOLUTION);
+ intel_dsi->video_frmt_cfg_bits |
+ intel_dsi->video_mode_format |
+ IP_TG_CONFIG |
+ RANDOM_DPI_DISPLAY_RESOLUTION);
}
static void intel_dsi_pre_pll_enable(struct intel_encoder *encoder)
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-16 17:32:37 +0300