From b1cb21a5f1c668534b25464717c806e141ba500f Mon Sep 17 00:00:00 2001 From: Madhav Chauhan Date: Thu, 5 Jul 2018 19:19:35 +0530 Subject: [PATCH] drm/i915/icl: Enable DSI IO power This patch configures mode of operation for DSI and enable DDI IO power by configuring power well. v2: Use for_each_dsi_port() for power get (Jani N) Signed-off-by: Madhav Chauhan Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/1530798591-2077-5-git-send-email-madhav.chauhan@intel.com --- drivers/gpu/drm/i915/icl_dsi.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/gpu/drm/i915/icl_dsi.c b/drivers/gpu/drm/i915/icl_dsi.c index 1eb4ac30e400..774ab262c8f3 100644 --- a/drivers/gpu/drm/i915/icl_dsi.c +++ b/drivers/gpu/drm/i915/icl_dsi.c @@ -54,11 +54,34 @@ static void gen11_dsi_program_esc_clk_div(struct intel_encoder *encoder) } } +static void gen11_dsi_enable_io_power(struct intel_encoder *encoder) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); + enum port port; + u32 tmp; + + for_each_dsi_port(port, intel_dsi->ports) { + tmp = I915_READ(ICL_DSI_IO_MODECTL(port)); + tmp |= COMBO_PHY_MODE_DSI; + I915_WRITE(ICL_DSI_IO_MODECTL(port), tmp); + } + + for_each_dsi_port(port, intel_dsi->ports) { + intel_display_power_get(dev_priv, port == PORT_A ? + POWER_DOMAIN_PORT_DDI_A_IO : + POWER_DOMAIN_PORT_DDI_B_IO); + } +} + static void __attribute__((unused)) gen11_dsi_pre_enable(struct intel_encoder *encoder, const struct intel_crtc_state *pipe_config, const struct drm_connector_state *conn_state) { + /* step2: enable IO power */ + gen11_dsi_enable_io_power(encoder); + /* step3: enable DSI PLL */ gen11_dsi_program_esc_clk_div(encoder); } -- 2.30.2