[PATCH 5.15 211/279] Revert "drm/i915/tgl/dsi: Gate the ddi clocks after pll mapping"

Greg Kroah-Hartman
2021-11-24T14:01:54Z

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

commit f15863b27752682bb700c21de5f83f613a0fb77e upstream.

This reverts commit 991d9557b0c4 ("drm/i915/tgl/dsi: Gate the ddi clocks
after pll mapping"). The Bspec was updated recently with the pll ungate
sequence similar to that of icl dsi enable sequence. Hence reverting.

Bspec: 49187
Fixes: 991d9557b0c4 ("drm/i915/tgl/dsi: Gate the ddi clocks after pll mapping")
Cc: <stable@vger.kernel.org> # v5.4+
Signed-off-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211109120428.15211-1-vandita.kulkarni@intel.com
(cherry picked from commit 4579509ef181480f4e4510d436c691519167c5c2)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/i915/display/icl_dsi.c | 10 ++--------
1 file changed, 2 insertions(+), 8 deletions(-)

--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -711,10 +711,7 @@ static void gen11_dsi_map_pll(struct int
intel_de_write(dev_priv, ICL_DPCLKA_CFGCR0, val);

for_each_dsi_phy(phy, intel_dsi->phys) {
- if (DISPLAY_VER(dev_priv) >= 12)
- val |= ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
- else
- val &= ~ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
+ val &= ~ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy);
}
intel_de_write(dev_priv, ICL_DPCLKA_CFGCR0, val);

@@ -1150,8 +1147,6 @@ static void
gen11_dsi_enable_port_and_phy(struct intel_encoder *encoder,
const struct intel_crtc_state *crtc_state)
{
- struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
-
/* step 4a: power up all lanes of the DDI used by DSI */
gen11_dsi_power_up_lanes(encoder);

@@ -1177,8 +1172,7 @@ gen11_dsi_enable_port_and_phy(struct int
gen11_dsi_configure_transcoder(encoder, crtc_state);

/* Step 4l: Gate DDI clocks */
- if (DISPLAY_VER(dev_priv) == 11)
- gen11_dsi_gate_clocks(encoder);
+ gen11_dsi_gate_clocks(encoder);
}

static void gen11_dsi_powerup_panel(struct intel_encoder *encoder)