Re: [PATCH v2] drm/i915: Bump max TMDS bitrate to 6 Gbps on ADL-S/ADL-P/DG2+

[Jani Nikula]

On Mon, 20 May 2024, Ville Syrjala  wrote:
> From: Ville Syrjälä 
>
> Bspec lists the mas TMDS bitrate as 6 Gbps on ADL-S/ADL-P/DG2.
> Bump our limit to match.
>
> v2: Bump for ADL-S as well (Jani)
>
> Cc: Jani Nikula 
> Signed-off-by: Ville Syrjälä 

Reviewed-by: Jani Nikula 


> ---
>  drivers/gpu/drm/i915/display/intel_hdmi.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c 
> b/drivers/gpu/drm/i915/display/intel_hdmi.c
> index 0faf2afa1c09..9ac670a40bc1 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
> @@ -1784,7 +1784,9 @@ static int intel_hdmi_source_max_tmds_clock(struct 
> intel_encoder *encoder)
>   struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
>   int max_tmds_clock, vbt_max_tmds_clock;
>  
> - if (DISPLAY_VER(dev_priv) >= 10)
> + if (DISPLAY_VER(dev_priv) >= 13 || IS_ALDERLAKE_S(dev_priv))
> + max_tmds_clock = 60;
> + else if (DISPLAY_VER(dev_priv) >= 10)
>   max_tmds_clock = 594000;
>   else if (DISPLAY_VER(dev_priv) >= 8 || IS_HASWELL(dev_priv))
>   max_tmds_clock = 30;

-- 
Jani Nikula, Intel

[PATCH v2] drm/i915: Bump max TMDS bitrate to 6 Gbps on ADL-S/ADL-P/DG2+

[Ville Syrjala]

From: Ville Syrjälä 

Bspec lists the mas TMDS bitrate as 6 Gbps on ADL-S/ADL-P/DG2.
Bump our limit to match.

v2: Bump for ADL-S as well (Jani)

Cc: Jani Nikula 
Signed-off-by: Ville Syrjälä 
---
 drivers/gpu/drm/i915/display/intel_hdmi.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c 
b/drivers/gpu/drm/i915/display/intel_hdmi.c
index 0faf2afa1c09..9ac670a40bc1 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -1784,7 +1784,9 @@ static int intel_hdmi_source_max_tmds_clock(struct 
intel_encoder *encoder)
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
int max_tmds_clock, vbt_max_tmds_clock;
 
-   if (DISPLAY_VER(dev_priv) >= 10)
+   if (DISPLAY_VER(dev_priv) >= 13 || IS_ALDERLAKE_S(dev_priv))
+   max_tmds_clock = 60;
+   else if (DISPLAY_VER(dev_priv) >= 10)
max_tmds_clock = 594000;
else if (DISPLAY_VER(dev_priv) >= 8 || IS_HASWELL(dev_priv))
max_tmds_clock = 30;
-- 
2.44.1