Add compressed bpp limitations for ultrajoiner. v2: Fix the case for 1 pipe. (Ankit) v3: Refactor existing helper separately and add only ultrajoiner limitation. (Ville) v4: Separate out function for ultrajoiner_ram_bits.
Signed-off-by: Ankit Nautiyal <[email protected]> --- drivers/gpu/drm/i915/display/intel_dp.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index a85527a55dc0..8a32d38d21bf 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -896,6 +896,16 @@ static u32 small_joiner_ram_max_bpp(struct intel_display *display, return max_bpp; } +static int ultrajoiner_ram_bits(void) +{ + return 4 * 72 * 512; +} + +static u32 ultrajoiner_ram_max_bpp(u32 mode_hdisplay) +{ + return ultrajoiner_ram_bits() / mode_hdisplay; +} + static u32 get_max_compressed_bpp_with_joiner(struct drm_i915_private *i915, u32 mode_clock, u32 mode_hdisplay, @@ -907,11 +917,18 @@ u32 get_max_compressed_bpp_with_joiner(struct drm_i915_private *i915, max_bpp_small_joiner_ram = small_joiner_ram_max_bpp(display, mode_hdisplay, num_joined_pipes); - if (num_joined_pipes == 2) { + if (num_joined_pipes > 1) { + u32 max_bpp; u32 max_bpp_bigjoiner = bigjoiner_bw_max_bpp(display, mode_clock, num_joined_pipes); - return min(max_bpp_small_joiner_ram, max_bpp_bigjoiner); + max_bpp = min(max_bpp_small_joiner_ram, max_bpp_bigjoiner); + + if (num_joined_pipes == 2) + return max_bpp; + + if (num_joined_pipes == 4) + return min(max_bpp, ultrajoiner_ram_max_bpp(mode_hdisplay)); } return max_bpp_small_joiner_ram; -- 2.45.2
