drm/i915/dsc: fix DSC register selection for ICL DSI transcoders

ICL eDP and DSI transcoders have a DSC engine separate from the
pipe. Abstract the register selection and fix it for ICL.

Add a warning for pipe A DSC on ICL; it does not exist.

Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Vandita Kulkarni <vandita.kulkarni@intel.com>
Reviewed-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/01bcddcdf397b1c8eb859ed18ebe023fb64383d9.1576081155.git.jani.nikula@intel.com

1 files changed, 38 insertions, 20 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index ed9048140937..e6f60be9ee84 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -353,6 +353,26 @@ bool intel_dsc_source_support(struct intel_encoder *encoder,
 	return false;
 }
 
+static bool is_pipe_dsc(const struct intel_crtc_state *crtc_state)
+{
+	const struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	const struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
+
+	if (INTEL_GEN(i915) >= 12)
+		return true;
+
+	if (cpu_transcoder == TRANSCODER_EDP ||
+	    cpu_transcoder == TRANSCODER_DSI_0 ||
+	    cpu_transcoder == TRANSCODER_DSI_1)
+		return false;
+
+	/* There's no pipe A DSC engine on ICL */
+	WARN_ON(crtc->pipe == PIPE_A);
+
+	return true;
+}
+
 int intel_dsc_compute_params(struct intel_encoder *encoder,
 			     struct intel_crtc_state *pipe_config)
 {
@@ -471,7 +491,6 @@ static void intel_dsc_pps_configure(struct intel_encoder *encoder,
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	const struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
 	enum pipe pipe = crtc->pipe;
-	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 	u32 pps_val = 0;
 	u32 rc_buf_thresh_dword[4];
 	u32 rc_range_params_dword[8];
@@ -492,7 +511,7 @@ static void intel_dsc_pps_configure(struct intel_encoder *encoder,
 	if (vdsc_cfg->vbr_enable)
 		pps_val |= DSC_VBR_ENABLE;
 	DRM_INFO("PPS0 = 0x%08x\n", pps_val);
-	if (cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(crtc_state)) {
 		I915_WRITE(DSCA_PICTURE_PARAMETER_SET_0, pps_val);
 		/*
 		 * If 2 VDSC instances are needed, configure PPS for second
@@ -511,7 +530,7 @@ static void intel_dsc_pps_configure(struct intel_encoder *encoder,
 	pps_val = 0;
 	pps_val |= DSC_BPP(vdsc_cfg->bits_per_pixel);
 	DRM_INFO("PPS1 = 0x%08x\n", pps_val);
-	if (cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(crtc_state)) {
 		I915_WRITE(DSCA_PICTURE_PARAMETER_SET_1, pps_val);
 		/*
 		 * If 2 VDSC instances are needed, configure PPS for second
@@ -531,7 +550,7 @@ static void intel_dsc_pps_configure(struct intel_encoder *encoder,
 	pps_val |= DSC_PIC_HEIGHT(vdsc_cfg->pic_height) |
 		DSC_PIC_WIDTH(vdsc_cfg->pic_width / num_vdsc_instances);
 	DRM_INFO("PPS2 = 0x%08x\n", pps_val);
-	if (cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(crtc_state)) {
 		I915_WRITE(DSCA_PICTURE_PARAMETER_SET_2, pps_val);
 		/*
 		 * If 2 VDSC instances are needed, configure PPS for second
@@ -551,7 +570,7 @@ static void intel_dsc_pps_configure(struct intel_encoder *encoder,
 	pps_val |= DSC_SLICE_HEIGHT(vdsc_cfg->slice_height) |
 		DSC_SLICE_WIDTH(vdsc_cfg->slice_width);
 	DRM_INFO("PPS3 = 0x%08x\n", pps_val);
-	if (cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(crtc_state)) {
 		I915_WRITE(DSCA_PICTURE_PARAMETER_SET_3, pps_val);
 		/*
 		 * If 2 VDSC instances are needed, configure PPS for second
@@ -571,7 +590,7 @@ static void intel_dsc_pps_configure(struct intel_encoder *encoder,
 	pps_val |= DSC_INITIAL_XMIT_DELAY(vdsc_cfg->initial_xmit_delay) |
 		DSC_INITIAL_DEC_DELAY(vdsc_cfg->initial_dec_delay);
 	DRM_INFO("PPS4 = 0x%08x\n", pps_val);
-	if (cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(crtc_state)) {
 		I915_WRITE(DSCA_PICTURE_PARAMETER_SET_4, pps_val);
 		/*
 		 * If 2 VDSC instances are needed, configure PPS for second
@@ -591,7 +610,7 @@ static void intel_dsc_pps_configure(struct intel_encoder *encoder,
 	pps_val |= DSC_SCALE_INC_INT(vdsc_cfg->scale_increment_interval) |
 		DSC_SCALE_DEC_INT(vdsc_cfg->scale_decrement_interval);
 	DRM_INFO("PPS5 = 0x%08x\n", pps_val);
-	if (cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(crtc_state)) {
 		I915_WRITE(DSCA_PICTURE_PARAMETER_SET_5, pps_val);
 		/*
 		 * If 2 VDSC instances are needed, configure PPS for second
@@ -613,7 +632,7 @@ static void intel_dsc_pps_configure(struct intel_encoder *encoder,
 		DSC_FLATNESS_MIN_QP(vdsc_cfg->flatness_min_qp) |
 		DSC_FLATNESS_MAX_QP(vdsc_cfg->flatness_max_qp);
 	DRM_INFO("PPS6 = 0x%08x\n", pps_val);
-	if (cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(crtc_state)) {
 		I915_WRITE(DSCA_PICTURE_PARAMETER_SET_6, pps_val);
 		/*
 		 * If 2 VDSC instances are needed, configure PPS for second
@@ -633,7 +652,7 @@ static void intel_dsc_pps_configure(struct intel_encoder *encoder,
 	pps_val |= DSC_SLICE_BPG_OFFSET(vdsc_cfg->slice_bpg_offset) |
 		DSC_NFL_BPG_OFFSET(vdsc_cfg->nfl_bpg_offset);
 	DRM_INFO("PPS7 = 0x%08x\n", pps_val);
-	if (cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(crtc_state)) {
 		I915_WRITE(DSCA_PICTURE_PARAMETER_SET_7, pps_val);
 		/*
 		 * If 2 VDSC instances are needed, configure PPS for second
@@ -653,7 +672,7 @@ static void intel_dsc_pps_configure(struct intel_encoder *encoder,
 	pps_val |= DSC_FINAL_OFFSET(vdsc_cfg->final_offset) |
 		DSC_INITIAL_OFFSET(vdsc_cfg->initial_offset);
 	DRM_INFO("PPS8 = 0x%08x\n", pps_val);
-	if (cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(crtc_state)) {
 		I915_WRITE(DSCA_PICTURE_PARAMETER_SET_8, pps_val);
 		/*
 		 * If 2 VDSC instances are needed, configure PPS for second
@@ -673,7 +692,7 @@ static void intel_dsc_pps_configure(struct intel_encoder *encoder,
 	pps_val |= DSC_RC_MODEL_SIZE(DSC_RC_MODEL_SIZE_CONST) |
 		DSC_RC_EDGE_FACTOR(DSC_RC_EDGE_FACTOR_CONST);
 	DRM_INFO("PPS9 = 0x%08x\n", pps_val);
-	if (cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(crtc_state)) {
 		I915_WRITE(DSCA_PICTURE_PARAMETER_SET_9, pps_val);
 		/*
 		 * If 2 VDSC instances are needed, configure PPS for second
@@ -695,7 +714,7 @@ static void intel_dsc_pps_configure(struct intel_encoder *encoder,
 		DSC_RC_TARGET_OFF_HIGH(DSC_RC_TGT_OFFSET_HI_CONST) |
 		DSC_RC_TARGET_OFF_LOW(DSC_RC_TGT_OFFSET_LO_CONST);
 	DRM_INFO("PPS10 = 0x%08x\n", pps_val);
-	if (cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(crtc_state)) {
 		I915_WRITE(DSCA_PICTURE_PARAMETER_SET_10, pps_val);
 		/*
 		 * If 2 VDSC instances are needed, configure PPS for second
@@ -718,7 +737,7 @@ static void intel_dsc_pps_configure(struct intel_encoder *encoder,
 		DSC_SLICE_ROW_PER_FRAME(vdsc_cfg->pic_height /
 					vdsc_cfg->slice_height);
 	DRM_INFO("PPS16 = 0x%08x\n", pps_val);
-	if (cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(crtc_state)) {
 		I915_WRITE(DSCA_PICTURE_PARAMETER_SET_16, pps_val);
 		/*
 		 * If 2 VDSC instances are needed, configure PPS for second
@@ -742,7 +761,7 @@ static void intel_dsc_pps_configure(struct intel_encoder *encoder,
 		DRM_INFO(" RC_BUF_THRESH%d = 0x%08x\n", i,
 			 rc_buf_thresh_dword[i / 4]);
 	}
-	if (cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(crtc_state)) {
 		I915_WRITE(DSCA_RC_BUF_THRESH_0, rc_buf_thresh_dword[0]);
 		I915_WRITE(DSCA_RC_BUF_THRESH_0_UDW, rc_buf_thresh_dword[1]);
 		I915_WRITE(DSCA_RC_BUF_THRESH_1, rc_buf_thresh_dword[2]);
@@ -791,7 +810,7 @@ static void intel_dsc_pps_configure(struct intel_encoder *encoder,
 		DRM_INFO(" RC_RANGE_PARAM_%d = 0x%08x\n", i,
 			 rc_range_params_dword[i / 2]);
 	}
-	if (cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(crtc_state)) {
 		I915_WRITE(DSCA_RC_RANGE_PARAMETERS_0,
 			   rc_range_params_dword[0]);
 		I915_WRITE(DSCA_RC_RANGE_PARAMETERS_0_UDW,
@@ -870,7 +889,6 @@ void intel_dsc_get_config(struct intel_encoder *encoder,
 	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
 	struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
-	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
 	enum pipe pipe = crtc->pipe;
 	enum intel_display_power_domain power_domain;
 	intel_wakeref_t wakeref;
@@ -885,7 +903,7 @@ void intel_dsc_get_config(struct intel_encoder *encoder,
 	if (!wakeref)
 		return;
 
-	if (crtc_state->cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(crtc_state)) {
 		dss_ctl1 = I915_READ(DSS_CTL1);
 		dss_ctl2 = I915_READ(DSS_CTL2);
 	} else {
@@ -903,7 +921,7 @@ void intel_dsc_get_config(struct intel_encoder *encoder,
 	/* FIXME: add more state readout as needed */
 
 	/* PPS1 */
-	if (cpu_transcoder == TRANSCODER_EDP)
+	if (!is_pipe_dsc(crtc_state))
 		val = I915_READ(DSCA_PICTURE_PARAMETER_SET_1);
 	else
 		val = I915_READ(ICL_DSC0_PICTURE_PARAMETER_SET_1(pipe));
@@ -975,7 +993,7 @@ void intel_dsc_enable(struct intel_encoder *encoder,
 	else
 		intel_dsc_dp_pps_write(encoder, crtc_state);
 
-	if (crtc_state->cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(crtc_state)) {
 		dss_ctl1_reg = DSS_CTL1;
 		dss_ctl2_reg = DSS_CTL2;
 	} else {
@@ -1002,7 +1020,7 @@ void intel_dsc_disable(const struct intel_crtc_state *old_crtc_state)
 	if (!old_crtc_state->dsc.compression_enable)
 		return;
 
-	if (old_crtc_state->cpu_transcoder == TRANSCODER_EDP) {
+	if (!is_pipe_dsc(old_crtc_state)) {
 		dss_ctl1_reg = DSS_CTL1;
 		dss_ctl2_reg = DSS_CTL2;
 	} else {