Use helpers for source min/max input bpc with DSC.
While at it, make them return int instead of u8 and use struct
intel_display.

v2: Make the helpers return int instead of u8. (Jani)
v3: Use min/max macros instead of min_t/max_t. (Jani)
v4: Use struct intel_display.

Signed-off-by: Ankit Nautiyal <[email protected]>
Reviewed-by: Suraj Kandpal <[email protected]>
---
 drivers/gpu/drm/i915/display/intel_dp.c     | 29 ++++++++++-----------
 drivers/gpu/drm/i915/display/intel_dp.h     |  3 +++
 drivers/gpu/drm/i915/display/intel_dp_mst.c | 14 +++++-----
 3 files changed, 23 insertions(+), 23 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c 
b/drivers/gpu/drm/i915/display/intel_dp.c
index cf09698b0ee9..b553b24604e1 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1763,16 +1763,15 @@ intel_dp_compute_link_config_wide(struct intel_dp 
*intel_dp,
        return -EINVAL;
 }
 
-static
-int intel_dp_dsc_max_src_input_bpc(struct drm_i915_private *i915)
+int intel_dp_dsc_max_src_input_bpc(struct intel_display *display)
 {
-       if (!HAS_DSC(i915))
+       if (!HAS_DSC(display))
                return 0;
 
        /* Max DSC Input BPC for ICL is 10 and for TGL+ is 12 */
-       if (DISPLAY_VER(i915) >= 12)
+       if (DISPLAY_VER(display) >= 12)
                return 12;
-       if (DISPLAY_VER(i915) == 11)
+       if (DISPLAY_VER(display) == 11)
                return 10;
 
        return 0;
@@ -1781,12 +1780,12 @@ int intel_dp_dsc_max_src_input_bpc(struct 
drm_i915_private *i915)
 int intel_dp_dsc_compute_max_bpp(const struct intel_connector *connector,
                                 u8 max_req_bpc)
 {
-       struct drm_i915_private *i915 = to_i915(connector->base.dev);
+       struct intel_display *display = to_intel_display(connector);
        int i, num_bpc;
        u8 dsc_bpc[3] = {};
        int dsc_max_bpc;
 
-       dsc_max_bpc = intel_dp_dsc_max_src_input_bpc(i915);
+       dsc_max_bpc = intel_dp_dsc_max_src_input_bpc(display);
 
        if (!dsc_max_bpc)
                return dsc_max_bpc;
@@ -2160,11 +2159,10 @@ static int dsc_compute_compressed_bpp(struct intel_dp 
*intel_dp,
                                           dsc_max_bpp, dsc_min_bpp, pipe_bpp, 
timeslots);
 }
 
-static
-int intel_dp_dsc_min_src_input_bpc(struct drm_i915_private *i915)
+int intel_dp_dsc_min_src_input_bpc(struct intel_display *display)
 {
        /* Min DSC Input BPC for ICL+ is 8 */
-       return HAS_DSC(i915) ? 8 : 0;
+       return HAS_DSC(display) ? 8 : 0;
 }
 
 static
@@ -2173,10 +2171,11 @@ bool is_dsc_pipe_bpp_sufficient(struct drm_i915_private 
*i915,
                                struct link_config_limits *limits,
                                int pipe_bpp)
 {
+       struct intel_display *display = to_intel_display(&i915->drm);
        int dsc_max_bpc, dsc_min_bpc, dsc_max_pipe_bpp, dsc_min_pipe_bpp;
 
-       dsc_max_bpc = min(intel_dp_dsc_max_src_input_bpc(i915), 
conn_state->max_requested_bpc);
-       dsc_min_bpc = intel_dp_dsc_min_src_input_bpc(i915);
+       dsc_max_bpc = min(intel_dp_dsc_max_src_input_bpc(display), 
conn_state->max_requested_bpc);
+       dsc_min_bpc = intel_dp_dsc_min_src_input_bpc(display);
 
        dsc_max_pipe_bpp = min(dsc_max_bpc * 3, limits->pipe.max_bpp);
        dsc_min_pipe_bpp = max(dsc_min_bpc * 3, limits->pipe.min_bpp);
@@ -2215,7 +2214,7 @@ static int intel_dp_dsc_compute_pipe_bpp(struct intel_dp 
*intel_dp,
                                         struct link_config_limits *limits,
                                         int timeslots)
 {
-       struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+       struct intel_display *display = to_intel_display(intel_dp);
        const struct intel_connector *connector =
                to_intel_connector(conn_state->connector);
        int max_req_bpc = conn_state->max_requested_bpc;
@@ -2236,14 +2235,14 @@ static int intel_dp_dsc_compute_pipe_bpp(struct 
intel_dp *intel_dp,
                }
        }
 
-       dsc_max_bpc = intel_dp_dsc_max_src_input_bpc(i915);
+       dsc_max_bpc = intel_dp_dsc_max_src_input_bpc(display);
        if (!dsc_max_bpc)
                return -EINVAL;
 
        dsc_max_bpc = min(dsc_max_bpc, max_req_bpc);
        dsc_max_bpp = min(dsc_max_bpc * 3, limits->pipe.max_bpp);
 
-       dsc_min_bpc = intel_dp_dsc_min_src_input_bpc(i915);
+       dsc_min_bpc = intel_dp_dsc_min_src_input_bpc(display);
        dsc_min_bpp = max(dsc_min_bpc * 3, limits->pipe.min_bpp);
 
        /*
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h 
b/drivers/gpu/drm/i915/display/intel_dp.h
index 53d1217800ef..8bd0bb4ec0e1 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -20,6 +20,7 @@ struct intel_atomic_state;
 struct intel_connector;
 struct intel_crtc_state;
 struct intel_digital_port;
+struct intel_display;
 struct intel_dp;
 struct intel_encoder;
 
@@ -205,5 +206,7 @@ bool intel_dp_link_params_valid(struct intel_dp *intel_dp, 
int link_rate,
                                u8 lane_count);
 bool intel_dp_has_connector(struct intel_dp *intel_dp,
                            const struct drm_connector_state *conn_state);
+int intel_dp_dsc_max_src_input_bpc(struct intel_display *display);
+int intel_dp_dsc_min_src_input_bpc(struct intel_display *display);
 
 #endif /* __INTEL_DP_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c 
b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 4765bda154c1..9453f3531910 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -328,6 +328,7 @@ static int intel_dp_dsc_mst_compute_link_config(struct 
intel_encoder *encoder,
                                                struct drm_connector_state 
*conn_state,
                                                struct link_config_limits 
*limits)
 {
+       struct intel_display *display = to_intel_display(encoder);
        struct intel_connector *connector =
                to_intel_connector(conn_state->connector);
        struct drm_i915_private *i915 = to_i915(connector->base.dev);
@@ -335,17 +336,14 @@ static int intel_dp_dsc_mst_compute_link_config(struct 
intel_encoder *encoder,
        int i, num_bpc;
        u8 dsc_bpc[3] = {};
        int min_bpp, max_bpp, sink_min_bpp, sink_max_bpp;
-       u8 dsc_max_bpc;
+       int dsc_max_bpc, dsc_min_bpc;
        int min_compressed_bpp, max_compressed_bpp;
 
-       /* Max DSC Input BPC for ICL is 10 and for TGL+ is 12 */
-       if (DISPLAY_VER(i915) >= 12)
-               dsc_max_bpc = min_t(u8, 12, conn_state->max_requested_bpc);
-       else
-               dsc_max_bpc = min_t(u8, 10, conn_state->max_requested_bpc);
+       dsc_max_bpc = intel_dp_dsc_max_src_input_bpc(display);
+       dsc_min_bpc = intel_dp_dsc_min_src_input_bpc(display);
 
-       max_bpp = min_t(u8, dsc_max_bpc * 3, limits->pipe.max_bpp);
-       min_bpp = limits->pipe.min_bpp;
+       max_bpp = min(dsc_max_bpc * 3, limits->pipe.max_bpp);
+       min_bpp = max(dsc_min_bpc * 3, limits->pipe.min_bpp);
 
        num_bpc = drm_dp_dsc_sink_supported_input_bpcs(connector->dp.dsc_dpcd,
                                                       dsc_bpc);
-- 
2.45.2

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