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Several DRM drivers already define their own constants for minimum and maximum TMDS character rates. By defining common rate constants in a shared header, drivers can just use them instead of having driver local define macros or use magic numbers. The values defined in the <linux/hdmi.h> header correspond to maximum TMDS character rates defined by each HDMI specification version: - HDMI_TMDS_CHAR_RATE_MIN_HZ: 25 MHz (minimum for all versions) - HDMI_1_0_TMDS_CHAR_RATE_MAX_HZ: 165 MHz (HDMI 1.0 maximum) - HDMI_1_3_TMDS_CHAR_RATE_MAX_HZ: 340 MHz (HDMI 1.3 maximum) - HDMI_2_0_TMDS_CHAR_RATE_MAX_HZ: 600 MHz (HDMI 2.0 maximum) Suggested-by: Maxime Ripard <mripard@kernel.org> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com> Reviewed-by: Maxime Ripard <mripard@kernel.org> Link: https://patch.msgid.link/20260520144424.1633354-2-javierm@redhat.com Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>