[Intel-gfx] [PATCH v2 10/10] drm/i915/dsi: add support for DSC
Jani Nikula
jani.nikula at intel.com
Fri Nov 15 15:33:46 UTC 2019
Enable DSC for DSI, if specified in VBT.
This is now excessively dynamic, being enabled at compute config. I
don't expect us to need to switch between DSC and non-DSC for the same
panel. Cargo culting the DP DSC shows.
Mode valid lacks a sensible implementation, as does get config.
v3: take compressed bpp into account
v2: Nuke conn_state->max_requested_bpc, it's not used on DSI
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
The burst mode stuff wrt DSC are still whatever, but at least we should
be taking DSC better into account in port clock calculations.
---
drivers/gpu/drm/i915/display/icl_dsi.c | 113 ++++++++++++++++++++-----
1 file changed, 94 insertions(+), 19 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index d576f29cef75..dc87134f5c27 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -34,6 +34,7 @@
#include "intel_ddi.h"
#include "intel_dsi.h"
#include "intel_panel.h"
+#include "intel_vdsc.h"
static inline int header_credits_available(struct drm_i915_private *dev_priv,
enum transcoder dsi_trans)
@@ -302,17 +303,22 @@ static void configure_dual_link_mode(struct intel_encoder *encoder,
}
/* aka DSI 8X clock */
-static int afe_clk(struct intel_encoder *encoder)
+static int afe_clk(struct intel_encoder *encoder,
+ const struct intel_crtc_state *crtc_state)
{
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
int bpp;
- bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
+ if (crtc_state->dsc.compression_enable)
+ bpp = crtc_state->dsc.compressed_bpp;
+ else
+ bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
return DIV_ROUND_CLOSEST(intel_dsi->pclk * bpp, intel_dsi->lane_count);
}
-static void gen11_dsi_program_esc_clk_div(struct intel_encoder *encoder)
+static void gen11_dsi_program_esc_clk_div(struct intel_encoder *encoder,
+ const struct intel_crtc_state *crtc_state)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
@@ -320,7 +326,7 @@ static void gen11_dsi_program_esc_clk_div(struct intel_encoder *encoder)
int afe_clk_khz;
u32 esc_clk_div_m;
- afe_clk_khz = afe_clk(encoder);
+ afe_clk_khz = afe_clk(encoder, crtc_state);
esc_clk_div_m = DIV_ROUND_UP(afe_clk_khz, DSI_MAX_ESC_CLK);
for_each_dsi_port(port, intel_dsi->ports) {
@@ -498,7 +504,9 @@ static void gen11_dsi_enable_ddi_buffer(struct intel_encoder *encoder)
}
}
-static void gen11_dsi_setup_dphy_timings(struct intel_encoder *encoder)
+static void
+gen11_dsi_setup_dphy_timings(struct intel_encoder *encoder,
+ const struct intel_crtc_state *crtc_state)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
@@ -539,7 +547,7 @@ static void gen11_dsi_setup_dphy_timings(struct intel_encoder *encoder)
* leave all fields at HW default values.
*/
if (IS_GEN(dev_priv, 11)) {
- if (afe_clk(encoder) <= 800000) {
+ if (afe_clk(encoder, crtc_state) <= 800000) {
for_each_dsi_port(port, intel_dsi->ports) {
tmp = I915_READ(DPHY_TA_TIMING_PARAM(port));
tmp &= ~TA_SURE_MASK;
@@ -649,7 +657,7 @@ gen11_dsi_configure_transcoder(struct intel_encoder *encoder,
tmp |= EOTP_DISABLED;
/* enable link calibration if freq > 1.5Gbps */
- if (afe_clk(encoder) >= 1500 * 1000) {
+ if (afe_clk(encoder, pipe_config) >= 1500 * 1000) {
tmp &= ~LINK_CALIBRATION_MASK;
tmp |= CALIBRATION_ENABLED_INITIAL_ONLY;
}
@@ -915,7 +923,8 @@ static void gen11_dsi_enable_transcoder(struct intel_encoder *encoder)
}
}
-static void gen11_dsi_setup_timeouts(struct intel_encoder *encoder)
+static void gen11_dsi_setup_timeouts(struct intel_encoder *encoder,
+ const struct intel_crtc_state *crtc_state)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
@@ -930,7 +939,7 @@ static void gen11_dsi_setup_timeouts(struct intel_encoder *encoder)
* TIME_NS = (BYTE_CLK_COUNT * 8 * 10^6)/ Bitrate
* ESCAPE_CLK_COUNT = TIME_NS/ESC_CLK_NS
*/
- divisor = intel_dsi_tlpx_ns(intel_dsi) * afe_clk(encoder) * 1000;
+ divisor = intel_dsi_tlpx_ns(intel_dsi) * afe_clk(encoder, crtc_state) * 1000;
mul = 8 * 1000000;
hs_tx_timeout = DIV_ROUND_UP(intel_dsi->hs_tx_timeout * mul,
divisor);
@@ -966,7 +975,7 @@ static void gen11_dsi_setup_timeouts(struct intel_encoder *encoder)
static void
gen11_dsi_enable_port_and_phy(struct intel_encoder *encoder,
- const struct intel_crtc_state *pipe_config)
+ const struct intel_crtc_state *crtc_state)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
@@ -983,13 +992,13 @@ gen11_dsi_enable_port_and_phy(struct intel_encoder *encoder,
gen11_dsi_enable_ddi_buffer(encoder);
/* setup D-PHY timings */
- gen11_dsi_setup_dphy_timings(encoder);
+ gen11_dsi_setup_dphy_timings(encoder, crtc_state);
/* step 4h: setup DSI protocol timeouts */
- gen11_dsi_setup_timeouts(encoder);
+ gen11_dsi_setup_timeouts(encoder, crtc_state);
/* Step (4h, 4i, 4j, 4k): Configure transcoder */
- gen11_dsi_configure_transcoder(encoder, pipe_config);
+ gen11_dsi_configure_transcoder(encoder, crtc_state);
/* Step 4l: Gate DDI clocks */
if (IS_GEN(dev_priv, 11))
@@ -1036,14 +1045,14 @@ static void gen11_dsi_powerup_panel(struct intel_encoder *encoder)
}
static void gen11_dsi_pre_pll_enable(struct intel_encoder *encoder,
- const struct intel_crtc_state *pipe_config,
+ const struct intel_crtc_state *crtc_state,
const struct drm_connector_state *conn_state)
{
/* step2: enable IO power */
gen11_dsi_enable_io_power(encoder);
/* step3: enable DSI PLL */
- gen11_dsi_program_esc_clk_div(encoder);
+ gen11_dsi_program_esc_clk_div(encoder, crtc_state);
}
static void gen11_dsi_pre_enable(struct intel_encoder *encoder,
@@ -1061,6 +1070,9 @@ static void gen11_dsi_pre_enable(struct intel_encoder *encoder,
/* step5: program and powerup panel */
gen11_dsi_powerup_panel(encoder);
+ /* FIXME: location? */
+ intel_dsc_enable(encoder, pipe_config);
+
/* step6c: configure transcoder timings */
gen11_dsi_set_transcoder_timings(encoder, pipe_config);
@@ -1222,6 +1234,13 @@ static void gen11_dsi_disable(struct intel_encoder *encoder,
gen11_dsi_disable_io_power(encoder);
}
+static enum drm_mode_status gen11_dsi_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ /* FIXME: DSC? */
+ return intel_dsi_mode_valid(connector, mode);
+}
+
static void gen11_dsi_get_timings(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config)
{
@@ -1269,6 +1288,53 @@ static void gen11_dsi_get_config(struct intel_encoder *encoder,
pipe_config->pipe_bpp = bdw_get_pipemisc_bpp(crtc);
}
+static int gen11_dsi_dsc_compute_config(struct intel_encoder *encoder,
+ struct intel_crtc_state *pipe_config)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ struct drm_dsc_config *vdsc_cfg = &pipe_config->dsc.config;
+ struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode;
+ int dsc_max_bpc = INTEL_GEN(dev_priv) >= 12 ? 12 : 10;
+ bool use_dsc;
+ int ret;
+
+ use_dsc = intel_bios_get_dsc_params(encoder, pipe_config, dsc_max_bpc);
+ if (!use_dsc)
+ return 0;
+
+ if (pipe_config->pipe_bpp < 8 * 3)
+ return -EINVAL;
+
+ if (adjusted_mode->crtc_clock > dev_priv->max_cdclk_freq) {
+ if (pipe_config->dsc.slice_count > 1) {
+ pipe_config->dsc.dsc_split = true;
+ } else {
+ DRM_DEBUG_KMS("Cannot split stream to use 2 VDSC instances\n");
+ return -EINVAL;
+ }
+ }
+
+ vdsc_cfg->convert_rgb = false;
+
+ ret = intel_dsc_compute_params(encoder, pipe_config);
+ if (ret)
+ return ret;
+
+ /* DSI specific sanity checks on the common code */
+ WARN_ON(vdsc_cfg->vbr_enable);
+ WARN_ON(vdsc_cfg->pic_width % vdsc_cfg->slice_width);
+ WARN_ON(vdsc_cfg->slice_height < 8);
+ WARN_ON(vdsc_cfg->pic_height % vdsc_cfg->slice_height);
+
+ ret = drm_dsc_compute_rc_parameters(vdsc_cfg);
+ if (ret)
+ return ret;
+
+ pipe_config->dsc.compression_enable = true;
+
+ return 0;
+}
+
static int gen11_dsi_compute_config(struct intel_encoder *encoder,
struct intel_crtc_state *pipe_config,
struct drm_connector_state *conn_state)
@@ -1300,7 +1366,11 @@ static int gen11_dsi_compute_config(struct intel_encoder *encoder,
pipe_config->pipe_bpp = 18;
pipe_config->clock_set = true;
- pipe_config->port_clock = afe_clk(encoder) / 5;
+
+ if (gen11_dsi_dsc_compute_config(encoder, pipe_config))
+ DRM_DEBUG_KMS("Attempting to use DSC failed\n");
+
+ pipe_config->port_clock = afe_clk(encoder, pipe_config) / 5;
return 0;
}
@@ -1308,8 +1378,13 @@ static int gen11_dsi_compute_config(struct intel_encoder *encoder,
static void gen11_dsi_get_power_domains(struct intel_encoder *encoder,
struct intel_crtc_state *crtc_state)
{
- get_dsi_io_power_domains(to_i915(encoder->base.dev),
- enc_to_intel_dsi(&encoder->base));
+ struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+
+ get_dsi_io_power_domains(i915, enc_to_intel_dsi(&encoder->base));
+
+ if (crtc_state->dsc.compression_enable)
+ intel_display_power_get(i915,
+ intel_dsc_power_domain(crtc_state));
}
static bool gen11_dsi_get_hw_state(struct intel_encoder *encoder,
@@ -1379,7 +1454,7 @@ static const struct drm_connector_funcs gen11_dsi_connector_funcs = {
static const struct drm_connector_helper_funcs gen11_dsi_connector_helper_funcs = {
.get_modes = intel_dsi_get_modes,
- .mode_valid = intel_dsi_mode_valid,
+ .mode_valid = gen11_dsi_mode_valid,
.atomic_check = intel_digital_connector_atomic_check,
};
--
2.20.1
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