[Intel-gfx] [PATCH v11 08/23] drm/i915/icl: Add get config functionality for DSI

[Jani Nikula]

From: Vandita Kulkarni <vandita.kulkarni at intel.com>

This patch implements the functionality for getting PIPE configuration
to which DSI encoder is connected. Use the same method to get port clock
like other DDI encoders. Used during the atomic modeset.

v2 by Jani:
- Squash Madhav's and Vandita's get config bits together
- Move cnl_calc_wrpll_link() to intel_drv.h
- Drop extra temp variables
- Use enc_to_intel_dsi() instead of open coding

Co-developed-by: Madhav Chauhan <madhav.chauhan at intel.com>
Signed-off-by: Vandita Kulkarni <vandita.kulkarni at intel.com>
Signed-off-by: Madhav Chauhan <madhav.chauhan at intel.com>
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/i915/icl_dsi.c   | 15 +++++++++++++++
 drivers/gpu/drm/i915/intel_ddi.c |  4 ++--
 drivers/gpu/drm/i915/intel_drv.h |  2 ++
 3 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/icl_dsi.c b/drivers/gpu/drm/i915/icl_dsi.c
index 43a4d19e36d8..fba68e1e1bd4 100644
--- a/drivers/gpu/drm/i915/icl_dsi.c
+++ b/drivers/gpu/drm/i915/icl_dsi.c
@@ -1060,6 +1060,20 @@ static void gen11_dsi_disable(struct intel_encoder *encoder,
 	gen11_dsi_disable_io_power(encoder);
 }
 
+static void gen11_dsi_get_config(struct intel_encoder *encoder,
+				 struct intel_crtc_state *pipe_config)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+	u32 pll_id;
+
+	/* FIXME: adapt icl_ddi_clock_get() for DSI and use that? */
+	pll_id = intel_get_shared_dpll_id(dev_priv, pipe_config->shared_dpll);
+	pipe_config->port_clock = cnl_calc_wrpll_link(dev_priv, pll_id);
+	pipe_config->base.adjusted_mode.crtc_clock = intel_dsi->pclk;
+	pipe_config->output_types |= BIT(INTEL_OUTPUT_DSI);
+}
+
 static void gen11_dsi_encoder_destroy(struct drm_encoder *encoder)
 {
 	intel_encoder_destroy(encoder);
@@ -1173,6 +1187,7 @@ void icl_dsi_init(struct drm_i915_private *dev_priv)
 	encoder->pre_enable = gen11_dsi_pre_enable;
 	encoder->disable = gen11_dsi_disable;
 	encoder->port = port;
+	encoder->get_config = gen11_dsi_get_config;
 	encoder->type = INTEL_OUTPUT_DSI;
 	encoder->cloneable = 0;
 	encoder->crtc_mask = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C);
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index b5fdf9a15338..64680c3c5d3d 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1364,8 +1364,8 @@ static int skl_calc_wrpll_link(struct drm_i915_private *dev_priv,
 	return dco_freq / (p0 * p1 * p2 * 5);
 }
 
-static int cnl_calc_wrpll_link(struct drm_i915_private *dev_priv,
-			       enum intel_dpll_id pll_id)
+int cnl_calc_wrpll_link(struct drm_i915_private *dev_priv,
+			enum intel_dpll_id pll_id)
 {
 	uint32_t cfgcr0, cfgcr1;
 	uint32_t p0, p1, p2, dco_freq, ref_clock;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 9018be2171ee..0005b261824e 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1523,6 +1523,8 @@ u8 intel_ddi_dp_pre_emphasis_max(struct intel_encoder *encoder,
 int intel_ddi_toggle_hdcp_signalling(struct intel_encoder *intel_encoder,
 				     bool enable);
 void icl_sanitize_encoder_pll_mapping(struct intel_encoder *encoder);
+int cnl_calc_wrpll_link(struct drm_i915_private *dev_priv,
+			enum intel_dpll_id pll_id);
 
 unsigned int intel_fb_align_height(const struct drm_framebuffer *fb,
 				   int color_plane, unsigned int height);
-- 
2.11.0