On 12/16/2024 11:45 PM, Suraj Kandpal wrote:
According to spec VDR_CUSTOM_WIDTH register gets programmed after pll
specific VDR registers and TX Lane programming registers are done.
Moreover we only program into C10_VDR_CONTROL1 to update config and
setup master lane once all VDR registers are written into.
Bspec: 67636
Fixes: 51390cc0e00a ("drm/i915/mtl: Add Support for C10 PHY message bus and pll programming")
Signed-off-by: Suraj Kandpal <suraj.kandpal@xxxxxxxxx>
Add the Bspec: 67636 as part of the trailer.
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_cx0_phy.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
index 142de06818a7..5ebc90d210d4 100644
--- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
@@ -2117,14 +2117,6 @@ static void intel_c10_pll_program(struct intel_display *display,
0, C10_VDR_CTRL_MSGBUS_ACCESS,
MB_WRITE_COMMITTED);
- /* Custom width needs to be programmed to 0 for both the phy lanes */
- intel_cx0_rmw(encoder, INTEL_CX0_BOTH_LANES, PHY_C10_VDR_CUSTOM_WIDTH,
- C10_VDR_CUSTOM_WIDTH_MASK, C10_VDR_CUSTOM_WIDTH_8_10,
- MB_WRITE_COMMITTED);
- intel_cx0_rmw(encoder, INTEL_CX0_BOTH_LANES, PHY_C10_VDR_CONTROL(1),
- 0, C10_VDR_CTRL_UPDATE_CFG,
- MB_WRITE_COMMITTED);
-
/* Program the pll values only for the master lane */
for (i = 0; i < ARRAY_SIZE(pll_state->pll); i++)
intel_cx0_write(encoder, INTEL_CX0_LANE0, PHY_C10_VDR_PLL(i),
@@ -2134,6 +2126,10 @@ static void intel_c10_pll_program(struct intel_display *display,
intel_cx0_write(encoder, INTEL_CX0_LANE0, PHY_C10_VDR_CMN(0), pll_state->cmn, MB_WRITE_COMMITTED);
intel_cx0_write(encoder, INTEL_CX0_LANE0, PHY_C10_VDR_TX(0), pll_state->tx, MB_WRITE_COMMITTED);
+ /* Custom width needs to be programmed to 0 for both the phy lanes */
+ intel_cx0_rmw(encoder, INTEL_CX0_BOTH_LANES, PHY_C10_VDR_CUSTOM_WIDTH,
+ C10_VDR_CUSTOM_WIDTH_MASK, C10_VDR_CUSTOM_WIDTH_8_10,
+ MB_WRITE_COMMITTED);
intel_cx0_rmw(encoder, INTEL_CX0_LANE0, PHY_C10_VDR_CONTROL(1),
0, C10_VDR_CTRL_MASTER_LANE | C10_VDR_CTRL_UPDATE_CFG,
MB_WRITE_COMMITTED);
