From dc7890995e04bacb45ab21e0daaeae1e7c803eb3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Thu, 5 Sep 2019 16:50:43 +0300 Subject: [PATCH] drm/i915: Bump skl+ max plane width to 5k for linear/x-tiled MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The officially validated plane width limit is 4k on skl+, however we already had people using 5k displays before we started to enforce the limit. Also it seems Windows allows 5k resolutions as well (though not sure if they do it with one plane or two). According to hw folks 5k should work with the possible exception of the following features: - Ytile (already limited to 4k) - FP16 (already limited to 4k) - render compression (already limited to 4k) - KVMR sprite and cursor (don't care) - horizontal panning (need to verify this) - pipe and plane scaling (need to verify this) So apart from last two items on that list we are already fine. We should really verify what happens with those last two items but I don't have a 5k display on hand atm so it'll have to wait. In the meantime let's just bump the limit back up to 5k since several users have already been using it without apparent issues. At least we'll be no worse off than we were prior to lowering the limits. Cc: stable@vger.kernel.org Cc: Sean Paul Cc: José Roberto de Souza Tested-by: Leho Kraav Fixes: 372b9ffb5799 ("drm/i915: Fix skl+ max plane width") Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111501 Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20190905135044.2001-1-ville.syrjala@linux.intel.com Reviewed-by: Maarten Lankhorst Reviewed-by: Sean Paul (cherry picked from commit bed34ef544f9ab37ab349c04cf4142282c4dcf5d) Signed-off-by: Rodrigo Vivi --- drivers/gpu/drm/i915/display/intel_display.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index ce05e805b08f..aa54bb22796d 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -3280,7 +3280,20 @@ static int skl_max_plane_width(const struct drm_framebuffer *fb, switch (fb->modifier) { case DRM_FORMAT_MOD_LINEAR: case I915_FORMAT_MOD_X_TILED: - return 4096; + /* + * Validated limit is 4k, but has 5k should + * work apart from the following features: + * - Ytile (already limited to 4k) + * - FP16 (already limited to 4k) + * - render compression (already limited to 4k) + * - KVMR sprite and cursor (don't care) + * - horizontal panning (TODO verify this) + * - pipe and plane scaling (TODO verify this) + */ + if (cpp == 8) + return 4096; + else + return 5120; case I915_FORMAT_MOD_Y_TILED_CCS: case I915_FORMAT_MOD_Yf_TILED_CCS: /* FIXME AUX plane? */