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drm/i915/icl: Disable DSI transcoders

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This patch disables transcoders by writing to TRANS_CONF
registers for each DSI ports.

v2 by Jani:
 - Wait for pipeconf active to go low

Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/c76035309fa721322cf9c1ca7fc42b822937c2f3.1540900289.git.jani.nikula@intel.com
This commit is contained in:
Madhav Chauhan 2018-10-30 13:56:14 +02:00 committed by Jani Nikula
parent d9d996b6ca
commit 4e123bd303
1 changed files with 26 additions and 0 deletions
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26
drivers/gpu/drm/i915/icl_dsi.c
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@ -777,6 +777,29 @@ gen11_dsi_pre_enable(struct intel_encoder *encoder,
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_BACKLIGHT_ON);
}
static void gen11_dsi_disable_transcoder(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;
enum transcoder dsi_trans;
u32 tmp;
for_each_dsi_port(port, intel_dsi->ports) {
dsi_trans = dsi_port_to_transcoder(port);
/* disable transcoder */
tmp = I915_READ(PIPECONF(dsi_trans));
tmp &= ~PIPECONF_ENABLE;
I915_WRITE(PIPECONF(dsi_trans), tmp);
/* wait for transcoder to be disabled */
if (intel_wait_for_register(dev_priv, PIPECONF(dsi_trans),
I965_PIPECONF_ACTIVE, 0, 50))
DRM_ERROR("DSI trancoder not disabled\n");
}
}
static void __attribute__((unused)) gen11_dsi_disable(
struct intel_encoder *encoder,
const struct intel_crtc_state *old_crtc_state,
@ -787,4 +810,7 @@ static void __attribute__((unused)) gen11_dsi_disable(
/* step1: turn off backlight */
intel_dsi_vbt_exec_sequence(intel_dsi, MIPI_SEQ_BACKLIGHT_OFF);
intel_panel_disable_backlight(old_conn_state);
/* step2d,e: disable transcoder and wait */
gen11_dsi_disable_transcoder(encoder);
}