platform: msm_shared: enable programmable fetch for MDP
MDP starts fetching from vertical back porch currently.
Once the active region is finished, MDP stays idle during
the vertical front porch region. Starting from MDP v1.5, MDP
has the capability to fetch at a programmable line during
vertical front porch region. Add support for this feature.
Also flush the MDP timing interface registers for the
programming to take effect.
Change-Id: I52a0913269a4eb70b58808d33d211e4f6f28d211
diff --git a/platform/msm_shared/mdp5.c b/platform/msm_shared/mdp5.c
index 1c0f1aa..7db7306 100644
--- a/platform/msm_shared/mdp5.c
+++ b/platform/msm_shared/mdp5.c
@@ -40,6 +40,9 @@
#include <clock.h>
#include <scm.h>
+#define MDP_MIN_FETCH 9
+#define MDSS_MDP_MAX_FETCH 12
+
int restore_secure_cfg(uint32_t id);
static int mdp_rev;
@@ -121,11 +124,14 @@
*ctl1_reg_val = 0x24082;
break;
}
- /* For 8916/8939, MDP INTF registers are double buffered */
+ /* For targets from MDP v1.5, MDP INTF registers are double buffered */
if ((mdss_mdp_rev == MDSS_MDP_HW_REV_106) ||
(mdss_mdp_rev == MDSS_MDP_HW_REV_108)) {
*ctl0_reg_val |= BIT(30);
- *ctl1_reg_val |= BIT(30);
+ *ctl1_reg_val |= BIT(31);
+ } else if (mdss_mdp_rev == MDSS_MDP_HW_REV_105) {
+ *ctl0_reg_val |= BIT(30);
+ *ctl1_reg_val |= BIT(29);
}
}
@@ -442,6 +448,63 @@
writel(0x213F, MDP_PANEL_FORMAT + mdss_mdp_intf_off);
}
+void mdss_intf_fetch_start_config(struct msm_panel_info *pinfo,
+ uint32_t intf_base)
+{
+ uint32_t mdp_hw_rev = readl(MDP_HW_REV);
+ uint32_t mdss_mdp_intf_off;
+ uint32_t v_total, h_total, fetch_start, vfp_start, fetch_lines;
+ uint32_t adjust_xres = 0;
+
+ struct lcdc_panel_info *lcdc = NULL;
+
+ if (pinfo == NULL)
+ return;
+
+ lcdc = &(pinfo->lcdc);
+ if (lcdc == NULL)
+ return;
+
+ /*
+ * MDP programmable fetch is for MDP with rev >= 1.05.
+ * Programmable fetch is not needed if vertical back porch
+ * is >= 9.
+ */
+ if (mdp_hw_rev < MDSS_MDP_HW_REV_105 ||
+ lcdc->v_back_porch >= MDP_MIN_FETCH)
+ return;
+
+ mdss_mdp_intf_off = intf_base + mdss_mdp_intf_offset();
+
+ adjust_xres = pinfo->xres;
+ if (pinfo->lcdc.split_display)
+ adjust_xres /= 2;
+
+ /*
+ * Fetch should always be outside the active lines. If the fetching
+ * is programmed within active region, hardware behavior is unknown.
+ */
+ v_total = lcdc->v_pulse_width + lcdc->v_back_porch + pinfo->yres +
+ lcdc->v_front_porch;
+ h_total = lcdc->h_pulse_width + lcdc->h_back_porch + adjust_xres +
+ lcdc->h_front_porch;
+ vfp_start = lcdc->v_pulse_width + lcdc->v_back_porch + pinfo->yres;
+
+ fetch_lines = v_total - vfp_start;
+
+ /*
+ * In some cases, vertical front porch is too high. In such cases limit
+ * the mdp fetch lines as the last 12 lines of vertical front porch.
+ */
+ if (fetch_lines > MDSS_MDP_MAX_FETCH)
+ fetch_lines = MDSS_MDP_MAX_FETCH;
+
+ fetch_start = (v_total - fetch_lines) * h_total + 1;
+
+ writel(fetch_start, MDP_PROG_FETCH_START + mdss_mdp_intf_off);
+ writel(BIT(31), MDP_INTF_CONFIG + mdss_mdp_intf_off);
+}
+
void mdss_layer_mixer_setup(struct fbcon_config *fb, struct msm_panel_info
*pinfo)
{
@@ -601,9 +664,12 @@
uint32_t reg;
mdss_intf_tg_setup(pinfo, MDP_INTF_1_BASE);
+ mdss_intf_fetch_start_config(pinfo, MDP_INTF_1_BASE);
- if (pinfo->mipi.dual_dsi)
+ if (pinfo->mipi.dual_dsi) {
mdss_intf_tg_setup(pinfo, MDP_INTF_2_BASE);
+ mdss_intf_fetch_start_config(pinfo, MDP_INTF_2_BASE);
+ }
mdp_clk_gating_ctrl();