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.
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/icl_dsi.c | 75 ++++++++++++++++++++++++--
1 file changed, 72 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index 8eb2d7f29c82..823dbd9d4d06 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)
@@ -1050,6 +1051,9 @@ 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);
@@ -1211,6 +1215,13 @@ 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)
{
@@ -1258,6 +1269,56 @@ 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_connector_state *conn_state)
+{
+ 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;
+
+ dsc_max_bpc = min_t(int, dsc_max_bpc, conn_state->max_requested_bpc);
+
+ 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)
@@ -1286,14 +1347,22 @@ static int gen11_dsi_compute_config(struct intel_encoder *encoder,
pipe_config->clock_set = true;
pipe_config->port_clock = intel_dsi_bitrate(intel_dsi) / 5;
+ if (gen11_dsi_dsc_compute_config(encoder, pipe_config, conn_state))
+ DRM_DEBUG_KMS("Attempting to use DSC failed\n");
+
return 0;
}
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,
@@ -1360,7 +1429,7 @@ 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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