diff options
| -rw-r--r-- | drivers/gpu/drm/i915/Makefile | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/icl_dsi.c | 64 |
3 files changed, 66 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index e7fedb83aafc..5794f102f9b8 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -135,6 +135,7 @@ i915-y += dvo_ch7017.o \ dvo_ns2501.o \ dvo_sil164.o \ dvo_tfp410.o \ + icl_dsi.o \ intel_crt.o \ intel_ddi.o \ intel_dp_aux_backlight.o \ diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index dc953ee7e3b3..a35f4142cced 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -9552,6 +9552,7 @@ enum skl_power_gate { #define ICL_BYTE_CLK_PER_ESC_CLK_SHIFT 16 #define ICL_ESC_CLK_DIV_MASK 0x1ff #define ICL_ESC_CLK_DIV_SHIFT 0 +#define DSI_MAX_ESC_CLK 20000 /* in KHz */ /* Gen4+ Timestamp and Pipe Frame time stamp registers */ #define GEN4_TIMESTAMP _MMIO(0x2358) diff --git a/drivers/gpu/drm/i915/icl_dsi.c b/drivers/gpu/drm/i915/icl_dsi.c new file mode 100644 index 000000000000..1eb4ac30e400 --- /dev/null +++ b/drivers/gpu/drm/i915/icl_dsi.c @@ -0,0 +1,64 @@ +/* + * Copyright © 2018 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Authors: + * Madhav Chauhan <madhav.chauhan@intel.com> + * Jani Nikula <jani.nikula@intel.com> + */ + +#include "intel_dsi.h" + +static void gen11_dsi_program_esc_clk_div(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 bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format); + u32 afe_clk_khz; /* 8X Clock */ + u32 esc_clk_div_m; + + afe_clk_khz = DIV_ROUND_CLOSEST(intel_dsi->pclk * bpp, + intel_dsi->lane_count); + + esc_clk_div_m = DIV_ROUND_UP(afe_clk_khz, DSI_MAX_ESC_CLK); + + for_each_dsi_port(port, intel_dsi->ports) { + I915_WRITE(ICL_DSI_ESC_CLK_DIV(port), + esc_clk_div_m & ICL_ESC_CLK_DIV_MASK); + POSTING_READ(ICL_DSI_ESC_CLK_DIV(port)); + } + + for_each_dsi_port(port, intel_dsi->ports) { + I915_WRITE(ICL_DPHY_ESC_CLK_DIV(port), + esc_clk_div_m & ICL_ESC_CLK_DIV_MASK); + POSTING_READ(ICL_DPHY_ESC_CLK_DIV(port)); + } +} + +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) +{ + /* step3: enable DSI PLL */ + gen11_dsi_program_esc_clk_div(encoder); +} |