From 74e4ce6a78751f0a602dcbd00b53f710e312fcc5 Mon Sep 17 00:00:00 2001 From: Madhav Chauhan Date: Tue, 13 Jun 2017 13:18:14 +0530 Subject: [PATCH] drm/i915/glk: Split GLK DSI device ready functionality Git-commit: 74e4ce6a78751f0a602dcbd00b53f710e312fcc5 Patch-mainline: v4.13-rc1 References: FATE#322643 bsc#1055900 This patch divides glk_dsi_device_ready() function into two part. First part will program LP wake and MIPI DSI mode to MIPI_CTRL reg using newly defined function glk_dsi_enable_io(). glk_dsi_enable_io() will be called from intel_dsi_pre_enable. Second part will do remaining device ready activities using the existing function glk_dsi_device_ready(). Signed-off-by: Madhav Chauhan Signed-off-by: Jani Nikula Link: http://patchwork.freedesktop.org/patch/msgid/1497340095-5877-1-git-send-email-madhav.chauhan@intel.com Acked-by: Takashi Iwai --- drivers/gpu/drm/i915/intel_dsi.c | 25 ++++++++++++++++++------- 1 file changed, 18 insertions(+), 7 deletions(-) --- a/drivers/gpu/drm/i915/intel_dsi.c +++ b/drivers/gpu/drm/i915/intel_dsi.c @@ -346,12 +346,12 @@ static bool intel_dsi_compute_config(str return true; } -static void glk_dsi_device_ready(struct intel_encoder *encoder) +static void glk_dsi_enable_io(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, val; + u32 tmp; /* Set the MIPI mode * If MIPI_Mode is off, then writing to LP_Wake bit is not reflecting. @@ -381,6 +381,14 @@ static void glk_dsi_device_ready(struct GLK_MIPIIO_PORT_POWERED, 20)) DRM_ERROR("MIPIO port is powergated\n"); } +} + +static void glk_dsi_device_ready(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 val; /* Wait for MIPI PHY status bit to set */ for_each_dsi_port(port, intel_dsi->ports) { @@ -391,8 +399,8 @@ static void glk_dsi_device_ready(struct } /* Get IO out of reset */ - tmp = I915_READ(MIPI_CTRL(PORT_A)); - I915_WRITE(MIPI_CTRL(PORT_A), tmp | GLK_MIPIIO_RESET_RELEASED); + val = I915_READ(MIPI_CTRL(PORT_A)); + I915_WRITE(MIPI_CTRL(PORT_A), val | GLK_MIPIIO_RESET_RELEASED); /* Get IO out of Low power state*/ for_each_dsi_port(port, intel_dsi->ports) { @@ -427,9 +435,9 @@ static void glk_dsi_device_ready(struct val |= (ULPS_STATE_NORMAL_OPERATION | DEVICE_READY); I915_WRITE(MIPI_DEVICE_READY(port), val); - tmp = I915_READ(MIPI_CTRL(port)); - tmp &= ~GLK_LP_WAKE; - I915_WRITE(MIPI_CTRL(port), tmp); + val = I915_READ(MIPI_CTRL(port)); + val &= ~GLK_LP_WAKE; + I915_WRITE(MIPI_CTRL(port), val); } /* Wait for Stop state */ @@ -811,6 +819,9 @@ static void intel_dsi_pre_enable(struct /* Deassert reset */ intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_DEASSERT_RESET); + if (IS_GEMINILAKE(dev_priv)) + glk_dsi_enable_io(encoder); + /* Put device in ready state (LP-11) */ intel_dsi_device_ready(encoder);