[PATCH 09/12] drm/i915/dp: Use consistent name for link bpp and compressed bpp
Ankit Nautiyal
ankit.k.nautiyal at intel.com
Wed Apr 26 12:46:28 UTC 2023
Currently there are many places where we use output_bpp for link bpp and
compressed bpp.
Lets use consistent naming:
output_bpp : The intermediate value taking into account the
output_format chroma subsampling.
compressed_bpp : target bpp for the DSC encoder.
link_bpp : final bpp used in the link.
For 444 sampling without DSC:
link_bpp = output_bpp = pipe_bpp
For 420 sampling without DSC:
output_bpp = pipe_bpp / 2
link_bpp = output_bpp
For 444 sampling with DSC:
output_bpp = pipe_bpp
link_bpp = compressed_bpp, computed with output_bpp (i.e. pipe_bpp in
this case)
For 420 sampling with DSC:
output_bpp = pipe_bpp/2
link_bpp = compressed_bpp, computed with output_bpp
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
drivers/gpu/drm/i915/display/intel_dp.c | 89 +++++++++++----------
drivers/gpu/drm/i915/display/intel_dp.h | 14 ++--
drivers/gpu/drm/i915/display/intel_dp_mst.c | 22 ++---
3 files changed, 64 insertions(+), 61 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 42e7b3d48a97..11bb7f3d7373 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -722,13 +722,13 @@ u32 intel_dp_dsc_nearest_valid_bpp(struct drm_i915_private *i915, u32 bpp, u32 p
return bits_per_pixel;
}
-u16 intel_dp_dsc_get_output_bpp(struct drm_i915_private *i915,
- u32 link_clock, u32 lane_count,
- u32 mode_clock, u32 mode_hdisplay,
- bool bigjoiner,
- enum intel_output_format output_format,
- u32 pipe_bpp,
- u32 timeslots)
+u16 intel_dp_dsc_get_max_compressed_bpp(struct drm_i915_private *i915,
+ u32 link_clock, u32 lane_count,
+ u32 mode_clock, u32 mode_hdisplay,
+ bool bigjoiner,
+ enum intel_output_format output_format,
+ u32 pipe_bpp,
+ u32 timeslots)
{
u32 bits_per_pixel, max_bpp_small_joiner_ram;
@@ -1109,7 +1109,7 @@ intel_dp_mode_valid(struct drm_connector *_connector,
int target_clock = mode->clock;
int max_rate, mode_rate, max_lanes, max_link_clock;
int max_dotclk = dev_priv->max_dotclk_freq;
- u16 dsc_max_output_bpp = 0;
+ u16 dsc_max_compressed_bpp = 0;
u8 dsc_slice_count = 0;
enum drm_mode_status status;
bool dsc = false, bigjoiner = false;
@@ -1164,21 +1164,21 @@ intel_dp_mode_valid(struct drm_connector *_connector,
* integer value since we support only integer values of bpp.
*/
if (intel_dp_is_edp(intel_dp)) {
- dsc_max_output_bpp =
+ dsc_max_compressed_bpp =
drm_edp_dsc_sink_output_bpp(intel_dp->dsc_dpcd) >> 4;
dsc_slice_count =
drm_dp_dsc_sink_max_slice_count(intel_dp->dsc_dpcd,
true);
} else if (drm_dp_sink_supports_fec(intel_dp->fec_capable)) {
- dsc_max_output_bpp =
- intel_dp_dsc_get_output_bpp(dev_priv,
- max_link_clock,
- max_lanes,
- target_clock,
- mode->hdisplay,
- bigjoiner,
- output_format,
- pipe_bpp, 64) >> 4;
+ dsc_max_compressed_bpp =
+ intel_dp_dsc_get_max_compressed_bpp(dev_priv,
+ max_link_clock,
+ max_lanes,
+ target_clock,
+ mode->hdisplay,
+ bigjoiner,
+ output_format,
+ pipe_bpp, 64) >> 4;
dsc_slice_count =
intel_dp_dsc_get_slice_count(intel_dp,
target_clock,
@@ -1186,7 +1186,7 @@ intel_dp_mode_valid(struct drm_connector *_connector,
bigjoiner);
}
- dsc = dsc_max_output_bpp && dsc_slice_count;
+ dsc = dsc_max_compressed_bpp && dsc_slice_count;
}
/*
@@ -1468,9 +1468,9 @@ intel_dp_compute_link_config_wide(struct intel_dp *intel_dp,
int mode_rate, link_rate, link_avail;
for (bpp = limits->max_bpp; bpp >= limits->min_bpp; bpp -= 2 * 3) {
- int output_bpp = intel_dp_output_bpp(pipe_config->output_format, bpp);
+ int link_bpp = intel_dp_output_bpp(pipe_config->output_format, bpp);
- mode_rate = intel_dp_link_required(clock, output_bpp);
+ mode_rate = intel_dp_link_required(clock, link_bpp);
for (i = 0; i < intel_dp->num_common_rates; i++) {
link_rate = intel_dp_common_rate(intel_dp, i);
@@ -1694,20 +1694,21 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
drm_dp_dsc_sink_max_slice_count(intel_dp->dsc_dpcd,
true);
} else {
- u16 dsc_max_output_bpp = 0;
+ u16 dsc_max_compressed_bpp = 0;
u8 dsc_dp_slice_count;
if (compute_pipe_bpp) {
- dsc_max_output_bpp =
- intel_dp_dsc_get_output_bpp(dev_priv,
- pipe_config->port_clock,
- pipe_config->lane_count,
- adjusted_mode->crtc_clock,
- adjusted_mode->crtc_hdisplay,
- pipe_config->bigjoiner_pipes,
- pipe_config->output_format,
- pipe_bpp,
- timeslots);
+ dsc_max_compressed_bpp =
+ intel_dp_dsc_get_max_compressed_bpp(dev_priv,
+ pipe_config->port_clock,
+ pipe_config->lane_count,
+ adjusted_mode->crtc_clock,
+ adjusted_mode->crtc_hdisplay,
+ pipe_config->bigjoiner_pipes,
+ pipe_config->output_format,
+ pipe_bpp,
+ timeslots);
+
/*
* According to DSC 1.2a Section 4.1.1 Table 4.1 the maximum
* supported PPS value can be 63.9375 and with the further
@@ -1715,9 +1716,11 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
* restricting our target bpp to be 31.9375 at max
*/
if (pipe_config->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
- dsc_max_output_bpp = min_t(u16, dsc_max_output_bpp, 31 << 4);
+ dsc_max_compressed_bpp = min_t(u16,
+ dsc_max_compressed_bpp,
+ 31 << 4);
- if (!dsc_max_output_bpp) {
+ if (!dsc_max_compressed_bpp) {
drm_dbg_kms(&dev_priv->drm,
"Compressed BPP not supported\n");
return -EINVAL;
@@ -1745,7 +1748,7 @@ int intel_dp_dsc_compute_config(struct intel_dp *intel_dp,
pipe_config->pipe_bpp);
pipe_config->dsc.compressed_bpp = min_t(u16,
- dsc_max_output_bpp >> 4,
+ dsc_max_compressed_bpp >> 4,
output_bpp);
}
pipe_config->dsc.slice_count = dsc_dp_slice_count;
@@ -2121,7 +2124,7 @@ static bool can_enable_drrs(struct intel_connector *connector,
static void
intel_dp_drrs_compute_config(struct intel_connector *connector,
struct intel_crtc_state *pipe_config,
- int output_bpp)
+ int link_bpp)
{
struct drm_i915_private *i915 = to_i915(connector->base.dev);
const struct drm_display_mode *downclock_mode =
@@ -2146,7 +2149,7 @@ intel_dp_drrs_compute_config(struct intel_connector *connector,
if (pipe_config->splitter.enable)
pixel_clock /= pipe_config->splitter.link_count;
- intel_link_compute_m_n(output_bpp, pipe_config->lane_count, pixel_clock,
+ intel_link_compute_m_n(link_bpp, pipe_config->lane_count, pixel_clock,
pipe_config->port_clock, &pipe_config->dp_m2_n2,
pipe_config->fec_enable);
@@ -2243,7 +2246,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
const struct drm_display_mode *fixed_mode;
struct intel_connector *connector = intel_dp->attached_connector;
- int ret = 0, output_bpp;
+ int ret = 0, link_bpp;
if (HAS_PCH_SPLIT(dev_priv) && !HAS_DDI(dev_priv) && encoder->port != PORT_A)
pipe_config->has_pch_encoder = true;
@@ -2293,10 +2296,10 @@ intel_dp_compute_config(struct intel_encoder *encoder,
intel_dp_limited_color_range(pipe_config, conn_state);
if (pipe_config->dsc.compression_enable)
- output_bpp = pipe_config->dsc.compressed_bpp;
+ link_bpp = pipe_config->dsc.compressed_bpp;
else
- output_bpp = intel_dp_output_bpp(pipe_config->output_format,
- pipe_config->pipe_bpp);
+ link_bpp = intel_dp_output_bpp(pipe_config->output_format,
+ pipe_config->pipe_bpp);
if (intel_dp->mso_link_count) {
int n = intel_dp->mso_link_count;
@@ -2320,7 +2323,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
intel_dp_audio_compute_config(encoder, pipe_config, conn_state);
- intel_link_compute_m_n(output_bpp,
+ intel_link_compute_m_n(link_bpp,
pipe_config->lane_count,
adjusted_mode->crtc_clock,
pipe_config->port_clock,
@@ -2336,7 +2339,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
intel_vrr_compute_config(pipe_config, conn_state);
intel_psr_compute_config(intel_dp, pipe_config, conn_state);
- intel_dp_drrs_compute_config(connector, pipe_config, output_bpp);
+ intel_dp_drrs_compute_config(connector, pipe_config, link_bpp);
intel_dp_compute_vsc_sdp(intel_dp, pipe_config, conn_state);
intel_dp_compute_hdr_metadata_infoframe_sdp(intel_dp, pipe_config, conn_state);
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 856172bfa13e..42b98546c140 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -103,13 +103,13 @@ void intel_read_dp_sdp(struct intel_encoder *encoder,
unsigned int type);
bool intel_digital_port_connected(struct intel_encoder *encoder);
int intel_dp_dsc_compute_bpp(struct intel_dp *intel_dp, u8 dsc_max_bpc);
-u16 intel_dp_dsc_get_output_bpp(struct drm_i915_private *i915,
- u32 link_clock, u32 lane_count,
- u32 mode_clock, u32 mode_hdisplay,
- bool bigjoiner,
- enum intel_output_format output_format,
- u32 pipe_bpp,
- u32 timeslots);
+u16 intel_dp_dsc_get_max_compressed_bpp(struct drm_i915_private *i915,
+ u32 link_clock, u32 lane_count,
+ u32 mode_clock, u32 mode_hdisplay,
+ bool bigjoiner,
+ enum intel_output_format output_format,
+ u32 pipe_bpp,
+ u32 timeslots);
u8 intel_dp_dsc_get_slice_count(struct intel_dp *intel_dp,
int mode_clock, int mode_hdisplay,
bool bigjoiner);
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 2c2d258a3a77..d92af6122763 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -915,7 +915,7 @@ intel_dp_mst_mode_valid_ctx(struct drm_connector *connector,
int max_rate, mode_rate, max_lanes, max_link_clock;
int ret;
bool dsc = false, bigjoiner = false;
- u16 dsc_max_output_bpp = 0;
+ u16 dsc_max_compressed_bpp = 0;
u8 dsc_slice_count = 0;
int target_clock = mode->clock;
@@ -969,15 +969,15 @@ intel_dp_mst_mode_valid_ctx(struct drm_connector *connector,
int pipe_bpp = intel_dp_dsc_compute_bpp(intel_dp, U8_MAX);
if (drm_dp_sink_supports_fec(intel_dp->fec_capable)) {
- dsc_max_output_bpp =
- intel_dp_dsc_get_output_bpp(dev_priv,
- max_link_clock,
- max_lanes,
- target_clock,
- mode->hdisplay,
- bigjoiner,
- INTEL_OUTPUT_FORMAT_RGB,
- pipe_bpp, 64) >> 4;
+ dsc_max_compressed_bpp =
+ intel_dp_dsc_get_max_compressed_bpp(dev_priv,
+ max_link_clock,
+ max_lanes,
+ target_clock,
+ mode->hdisplay,
+ bigjoiner,
+ INTEL_OUTPUT_FORMAT_RGB,
+ pipe_bpp, 64) >> 4;
dsc_slice_count =
intel_dp_dsc_get_slice_count(intel_dp,
target_clock,
@@ -985,7 +985,7 @@ intel_dp_mst_mode_valid_ctx(struct drm_connector *connector,
bigjoiner);
}
- dsc = dsc_max_output_bpp && dsc_slice_count;
+ dsc = dsc_max_compressed_bpp && dsc_slice_count;
}
/*
--
2.25.1
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