diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0606-drm-vc4-Alter-the-HDMI-state-machine-clock-calc-to-a.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0606-drm-vc4-Alter-the-HDMI-state-machine-clock-calc-to-a.patch | 46 |
1 files changed, 0 insertions, 46 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0606-drm-vc4-Alter-the-HDMI-state-machine-clock-calc-to-a.patch b/target/linux/bcm27xx/patches-5.4/950-0606-drm-vc4-Alter-the-HDMI-state-machine-clock-calc-to-a.patch deleted file mode 100644 index dc2d1a2a04..0000000000 --- a/target/linux/bcm27xx/patches-5.4/950-0606-drm-vc4-Alter-the-HDMI-state-machine-clock-calc-to-a.patch +++ /dev/null @@ -1,46 +0,0 @@ -From 37b204f22778f51cad7bdf678d7574ff6d7508a6 Mon Sep 17 00:00:00 2001 -From: Dave Stevenson <dave.stevenson@raspberrypi.com> -Date: Wed, 25 Mar 2020 18:22:40 +0000 -Subject: [PATCH] drm/vc4: Alter the HDMI state machine clock calc to - allow for 1920x1200 - -Whilst the documentation for BCM2835 states that the HDMI state machine -clock needs to be 108% of the pixel clock, other documentation says -that it only has to be greater than the pixel clock. The firmware -uses 101%, and that allows 1920x1200@60Hz to work within the -constraint of the HSM clock being < 163.68MHz. - -Adopt 101%, and increase the maximum pixel clock for vc4 to 162MHz -so that it too supports 1920x1200@60. - -Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> ---- - drivers/gpu/drm/vc4/vc4_hdmi.c | 9 +++++---- - 1 file changed, 5 insertions(+), 4 deletions(-) - ---- a/drivers/gpu/drm/vc4/vc4_hdmi.c -+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c -@@ -581,10 +581,11 @@ static void vc4_hdmi_encoder_enable(stru - } - - /* -- * The HSM rate needs to be at 108% of the pixel clock, with a -- * minimum of 108MHz. -+ * The HSM rate needs to be slightly greater than the pixel clock, with -+ * a minimum of 108MHz. -+ * Use 101% as this is what the firmware uses. - */ -- hsm_rate = max_t(unsigned long, 108000000, (pixel_rate / 100) * 108); -+ hsm_rate = max_t(unsigned long, 108000000, (pixel_rate / 100) * 101); - ret = clk_set_rate(vc4_hdmi->hsm_clock, hsm_rate); - if (ret) { - DRM_ERROR("Failed to set HSM clock rate: %d\n", ret); -@@ -1731,7 +1732,7 @@ static int vc4_hdmi_dev_remove(struct pl - } - - static const struct vc4_hdmi_variant bcm2835_variant = { -- .max_pixel_clock = 148500000, -+ .max_pixel_clock = 162000000, - .audio_available = true, - .cec_available = true, - .registers = vc4_hdmi_fields, |