drm/i915/display: HDMI C10 PLL entry for 265250 MHz

[Almahallawy, Khaled]

Thank You for the patch

Without this patch on monitors that support this mode like Acer x34 and
LG 34GS95QE. this resolution is rejected as follow:

[drm:drm_mode_prune_invalid] Rejected mode: "3440x1440": 50 265250 3440
3488 3520 3600 1440 1443 1453 1474 0x48 0x9 (CLOCK_RANGE)

With this patch, we are able to drive this resolution and pixel clock:

 pipe mode: "3440x1440": 50 265250 3440 3488 3520 3600 1440 1443 1453
1474 0x40 0x9

Tested-by: Khaled Almahallawy <khaled.almahallawy at intel.com> 

On Wed, 2025-01-15 at 15:08 -0800, Clint Taylor wrote:
> Add PLL values for 265.250MHz pixel clock to support recent 3440x1440
> monitors.
> 
> Signed-off-by: Clint Taylor <clinton.a.taylor at intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_cx0_phy.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c
> b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
> index e768dc6a15b3..c5ea8202a455 100644
> --- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c
> +++ b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
> @@ -1620,6 +1620,16 @@ static const struct intel_c10pll_state
> mtl_c10_hdmi_262750 = {
>  	.pll[15] = 0x09, .pll[16] = 0x09, .pll[17] = 0xCF, .pll[18]
> = 0x84, .pll[19] = 0x23,
>  };
>  
> +static const struct intel_c10pll_state mtl_c10_hdmi_265250 = {
> +	.clock = 265250,
> +	.tx = 0x10,
> +	.cmn = 0x1,
> +	.pll[0] = 0xF4, .pll[1] = 0x00, .pll[2] = 0x6A, .pll[3] =
> 0x00, .pll[4] = 0x00,
> +	.pll[5] = 0x00, .pll[6] = 0x00, .pll[7] = 0x00, .pll[8] =
> 0x20, .pll[9] = 0xFF,
> +	.pll[10] = 0xFF, .pll[11] = 0x55, .pll[12] = 0x13, .pll[13]
> = 0x55, .pll[14] = 0x55,
> +	.pll[15] = 0x09, .pll[16] = 0x08, .pll[17] = 0x0F, .pll[18]
> = 0x85, .pll[19] = 0x23,
> +};
> +
>  static const struct intel_c10pll_state mtl_c10_hdmi_268500 = {
>  	.clock = 268500,
>  	.tx = 0x10,
> @@ -1728,6 +1738,7 @@ static const struct intel_c10pll_state * const
> mtl_c10_hdmi_tables[] = {
>  	&mtl_c10_hdmi_209800,
>  	&mtl_c10_hdmi_241500,
>  	&mtl_c10_hdmi_262750,
> +	&mtl_c10_hdmi_265250,
>  	&mtl_c10_hdmi_268500,
>  	&mtl_c10_hdmi_296703,
>  	&mtl_c10_hdmi_297000,